git/setup.c

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#include "cache.h"
Clean up work-tree handling The old version of work-tree support was an unholy mess, barely readable, and not to the point. For example, why do you have to provide a worktree, when it is not used? As in "git status". Now it works. Another riddle was: if you can have work trees inside the git dir, why are some programs complaining that they need a work tree? IOW it is allowed to call $ git --git-dir=../ --work-tree=. bla when you really want to. In this case, you are both in the git directory and in the working tree. So, programs have to actually test for the right thing, namely if they are inside a working tree, and not if they are inside a git directory. Also, GIT_DIR=../.git should behave the same as if no GIT_DIR was specified, unless there is a repository in the current working directory. It does now. The logic to determine if a repository is bare, or has a work tree (tertium non datur), is this: --work-tree=bla overrides GIT_WORK_TREE, which overrides core.bare = true, which overrides core.worktree, which overrides GIT_DIR/.. when GIT_DIR ends in /.git, which overrides the directory in which .git/ was found. In related news, a long standing bug was fixed: when in .git/bla/x.git/, which is a bare repository, git formerly assumed ../.. to be the appropriate git dir. This problem was reported by Shawn Pearce to have caused much pain, where a colleague mistakenly ran "git init" in "/" a long time ago, and bare repositories just would not work. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-01 00:30:14 +00:00
#include "dir.h"
#include "string-list.h"
Clean up work-tree handling The old version of work-tree support was an unholy mess, barely readable, and not to the point. For example, why do you have to provide a worktree, when it is not used? As in "git status". Now it works. Another riddle was: if you can have work trees inside the git dir, why are some programs complaining that they need a work tree? IOW it is allowed to call $ git --git-dir=../ --work-tree=. bla when you really want to. In this case, you are both in the git directory and in the working tree. So, programs have to actually test for the right thing, namely if they are inside a working tree, and not if they are inside a git directory. Also, GIT_DIR=../.git should behave the same as if no GIT_DIR was specified, unless there is a repository in the current working directory. It does now. The logic to determine if a repository is bare, or has a work tree (tertium non datur), is this: --work-tree=bla overrides GIT_WORK_TREE, which overrides core.bare = true, which overrides core.worktree, which overrides GIT_DIR/.. when GIT_DIR ends in /.git, which overrides the directory in which .git/ was found. In related news, a long standing bug was fixed: when in .git/bla/x.git/, which is a bare repository, git formerly assumed ../.. to be the appropriate git dir. This problem was reported by Shawn Pearce to have caused much pain, where a colleague mistakenly ran "git init" in "/" a long time ago, and bare repositories just would not work. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-01 00:30:14 +00:00
static int inside_git_dir = -1;
static int inside_work_tree = -1;
static char *prefix_path_gently(const char *prefix, int len, const char *path)
setup: sanitize absolute and funny paths in get_pathspec() The prefix_path() function called from get_pathspec() is responsible for translating list of user-supplied pathspecs to list of pathspecs that is relative to the root of the work tree. When working inside a subdirectory, the user-supplied pathspecs are taken to be relative to the current subdirectory. Among special path components in pathspecs, we used to accept and interpret only "." ("the directory", meaning a no-op) and ".." ("up one level") at the beginning. Everything else was passed through as-is. For example, if you are in Documentation/ directory of the project, you can name Documentation/howto/maintain-git.txt as: howto/maintain-git.txt ../Documentation/howto/maitain-git.txt ../././Documentation/howto/maitain-git.txt but not as: howto/./maintain-git.txt $(pwd)/howto/maintain-git.txt This patch updates prefix_path() in several ways: - If the pathspec is not absolute, prefix (i.e. the current subdirectory relative to the root of the work tree, with terminating slash, if not empty) and the pathspec is concatenated first and used in the next step. Otherwise, that absolute pathspec is used in the next step. - Then special path components "." (no-op) and ".." (up one level) are interpreted to simplify the path. It is an error to have too many ".." to cause the intermediate result to step outside of the input to this step. - If the original pathspec was not absolute, the result from the previous step is the resulting "sanitized" pathspec. Otherwise, the result from the previous step is still absolute, and it is an error if it does not begin with the directory that corresponds to the root of the work tree. The directory is stripped away from the result and is returned. - In any case, the resulting pathspec in the array get_pathspec() returns omit the ones that caused errors. With this patch, the last two examples also behave as expected. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-29 06:44:27 +00:00
{
const char *orig = path;
char *sanitized;
if (is_absolute_path(orig)) {
const char *temp = real_path(path);
sanitized = xmalloc(len + strlen(temp) + 1);
strcpy(sanitized, temp);
} else {
sanitized = xmalloc(len + strlen(path) + 1);
setup: sanitize absolute and funny paths in get_pathspec() The prefix_path() function called from get_pathspec() is responsible for translating list of user-supplied pathspecs to list of pathspecs that is relative to the root of the work tree. When working inside a subdirectory, the user-supplied pathspecs are taken to be relative to the current subdirectory. Among special path components in pathspecs, we used to accept and interpret only "." ("the directory", meaning a no-op) and ".." ("up one level") at the beginning. Everything else was passed through as-is. For example, if you are in Documentation/ directory of the project, you can name Documentation/howto/maintain-git.txt as: howto/maintain-git.txt ../Documentation/howto/maitain-git.txt ../././Documentation/howto/maitain-git.txt but not as: howto/./maintain-git.txt $(pwd)/howto/maintain-git.txt This patch updates prefix_path() in several ways: - If the pathspec is not absolute, prefix (i.e. the current subdirectory relative to the root of the work tree, with terminating slash, if not empty) and the pathspec is concatenated first and used in the next step. Otherwise, that absolute pathspec is used in the next step. - Then special path components "." (no-op) and ".." (up one level) are interpreted to simplify the path. It is an error to have too many ".." to cause the intermediate result to step outside of the input to this step. - If the original pathspec was not absolute, the result from the previous step is the resulting "sanitized" pathspec. Otherwise, the result from the previous step is still absolute, and it is an error if it does not begin with the directory that corresponds to the root of the work tree. The directory is stripped away from the result and is returned. - In any case, the resulting pathspec in the array get_pathspec() returns omit the ones that caused errors. With this patch, the last two examples also behave as expected. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-29 06:44:27 +00:00
if (len)
memcpy(sanitized, prefix, len);
strcpy(sanitized + len, path);
}
if (normalize_path_copy(sanitized, sanitized))
setup: sanitize absolute and funny paths in get_pathspec() The prefix_path() function called from get_pathspec() is responsible for translating list of user-supplied pathspecs to list of pathspecs that is relative to the root of the work tree. When working inside a subdirectory, the user-supplied pathspecs are taken to be relative to the current subdirectory. Among special path components in pathspecs, we used to accept and interpret only "." ("the directory", meaning a no-op) and ".." ("up one level") at the beginning. Everything else was passed through as-is. For example, if you are in Documentation/ directory of the project, you can name Documentation/howto/maintain-git.txt as: howto/maintain-git.txt ../Documentation/howto/maitain-git.txt ../././Documentation/howto/maitain-git.txt but not as: howto/./maintain-git.txt $(pwd)/howto/maintain-git.txt This patch updates prefix_path() in several ways: - If the pathspec is not absolute, prefix (i.e. the current subdirectory relative to the root of the work tree, with terminating slash, if not empty) and the pathspec is concatenated first and used in the next step. Otherwise, that absolute pathspec is used in the next step. - Then special path components "." (no-op) and ".." (up one level) are interpreted to simplify the path. It is an error to have too many ".." to cause the intermediate result to step outside of the input to this step. - If the original pathspec was not absolute, the result from the previous step is the resulting "sanitized" pathspec. Otherwise, the result from the previous step is still absolute, and it is an error if it does not begin with the directory that corresponds to the root of the work tree. The directory is stripped away from the result and is returned. - In any case, the resulting pathspec in the array get_pathspec() returns omit the ones that caused errors. With this patch, the last two examples also behave as expected. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-29 06:44:27 +00:00
goto error_out;
if (is_absolute_path(orig)) {
size_t root_len, len, total;
setup: sanitize absolute and funny paths in get_pathspec() The prefix_path() function called from get_pathspec() is responsible for translating list of user-supplied pathspecs to list of pathspecs that is relative to the root of the work tree. When working inside a subdirectory, the user-supplied pathspecs are taken to be relative to the current subdirectory. Among special path components in pathspecs, we used to accept and interpret only "." ("the directory", meaning a no-op) and ".." ("up one level") at the beginning. Everything else was passed through as-is. For example, if you are in Documentation/ directory of the project, you can name Documentation/howto/maintain-git.txt as: howto/maintain-git.txt ../Documentation/howto/maitain-git.txt ../././Documentation/howto/maitain-git.txt but not as: howto/./maintain-git.txt $(pwd)/howto/maintain-git.txt This patch updates prefix_path() in several ways: - If the pathspec is not absolute, prefix (i.e. the current subdirectory relative to the root of the work tree, with terminating slash, if not empty) and the pathspec is concatenated first and used in the next step. Otherwise, that absolute pathspec is used in the next step. - Then special path components "." (no-op) and ".." (up one level) are interpreted to simplify the path. It is an error to have too many ".." to cause the intermediate result to step outside of the input to this step. - If the original pathspec was not absolute, the result from the previous step is the resulting "sanitized" pathspec. Otherwise, the result from the previous step is still absolute, and it is an error if it does not begin with the directory that corresponds to the root of the work tree. The directory is stripped away from the result and is returned. - In any case, the resulting pathspec in the array get_pathspec() returns omit the ones that caused errors. With this patch, the last two examples also behave as expected. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-29 06:44:27 +00:00
const char *work_tree = get_git_work_tree();
if (!work_tree)
goto error_out;
len = strlen(work_tree);
root_len = offset_1st_component(work_tree);
total = strlen(sanitized) + 1;
setup: sanitize absolute and funny paths in get_pathspec() The prefix_path() function called from get_pathspec() is responsible for translating list of user-supplied pathspecs to list of pathspecs that is relative to the root of the work tree. When working inside a subdirectory, the user-supplied pathspecs are taken to be relative to the current subdirectory. Among special path components in pathspecs, we used to accept and interpret only "." ("the directory", meaning a no-op) and ".." ("up one level") at the beginning. Everything else was passed through as-is. For example, if you are in Documentation/ directory of the project, you can name Documentation/howto/maintain-git.txt as: howto/maintain-git.txt ../Documentation/howto/maitain-git.txt ../././Documentation/howto/maitain-git.txt but not as: howto/./maintain-git.txt $(pwd)/howto/maintain-git.txt This patch updates prefix_path() in several ways: - If the pathspec is not absolute, prefix (i.e. the current subdirectory relative to the root of the work tree, with terminating slash, if not empty) and the pathspec is concatenated first and used in the next step. Otherwise, that absolute pathspec is used in the next step. - Then special path components "." (no-op) and ".." (up one level) are interpreted to simplify the path. It is an error to have too many ".." to cause the intermediate result to step outside of the input to this step. - If the original pathspec was not absolute, the result from the previous step is the resulting "sanitized" pathspec. Otherwise, the result from the previous step is still absolute, and it is an error if it does not begin with the directory that corresponds to the root of the work tree. The directory is stripped away from the result and is returned. - In any case, the resulting pathspec in the array get_pathspec() returns omit the ones that caused errors. With this patch, the last two examples also behave as expected. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-29 06:44:27 +00:00
if (strncmp(sanitized, work_tree, len) ||
(len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) {
setup: sanitize absolute and funny paths in get_pathspec() The prefix_path() function called from get_pathspec() is responsible for translating list of user-supplied pathspecs to list of pathspecs that is relative to the root of the work tree. When working inside a subdirectory, the user-supplied pathspecs are taken to be relative to the current subdirectory. Among special path components in pathspecs, we used to accept and interpret only "." ("the directory", meaning a no-op) and ".." ("up one level") at the beginning. Everything else was passed through as-is. For example, if you are in Documentation/ directory of the project, you can name Documentation/howto/maintain-git.txt as: howto/maintain-git.txt ../Documentation/howto/maitain-git.txt ../././Documentation/howto/maitain-git.txt but not as: howto/./maintain-git.txt $(pwd)/howto/maintain-git.txt This patch updates prefix_path() in several ways: - If the pathspec is not absolute, prefix (i.e. the current subdirectory relative to the root of the work tree, with terminating slash, if not empty) and the pathspec is concatenated first and used in the next step. Otherwise, that absolute pathspec is used in the next step. - Then special path components "." (no-op) and ".." (up one level) are interpreted to simplify the path. It is an error to have too many ".." to cause the intermediate result to step outside of the input to this step. - If the original pathspec was not absolute, the result from the previous step is the resulting "sanitized" pathspec. Otherwise, the result from the previous step is still absolute, and it is an error if it does not begin with the directory that corresponds to the root of the work tree. The directory is stripped away from the result and is returned. - In any case, the resulting pathspec in the array get_pathspec() returns omit the ones that caused errors. With this patch, the last two examples also behave as expected. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-29 06:44:27 +00:00
error_out:
free(sanitized);
return NULL;
setup: sanitize absolute and funny paths in get_pathspec() The prefix_path() function called from get_pathspec() is responsible for translating list of user-supplied pathspecs to list of pathspecs that is relative to the root of the work tree. When working inside a subdirectory, the user-supplied pathspecs are taken to be relative to the current subdirectory. Among special path components in pathspecs, we used to accept and interpret only "." ("the directory", meaning a no-op) and ".." ("up one level") at the beginning. Everything else was passed through as-is. For example, if you are in Documentation/ directory of the project, you can name Documentation/howto/maintain-git.txt as: howto/maintain-git.txt ../Documentation/howto/maitain-git.txt ../././Documentation/howto/maitain-git.txt but not as: howto/./maintain-git.txt $(pwd)/howto/maintain-git.txt This patch updates prefix_path() in several ways: - If the pathspec is not absolute, prefix (i.e. the current subdirectory relative to the root of the work tree, with terminating slash, if not empty) and the pathspec is concatenated first and used in the next step. Otherwise, that absolute pathspec is used in the next step. - Then special path components "." (no-op) and ".." (up one level) are interpreted to simplify the path. It is an error to have too many ".." to cause the intermediate result to step outside of the input to this step. - If the original pathspec was not absolute, the result from the previous step is the resulting "sanitized" pathspec. Otherwise, the result from the previous step is still absolute, and it is an error if it does not begin with the directory that corresponds to the root of the work tree. The directory is stripped away from the result and is returned. - In any case, the resulting pathspec in the array get_pathspec() returns omit the ones that caused errors. With this patch, the last two examples also behave as expected. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-29 06:44:27 +00:00
}
if (sanitized[len] == '/')
len++;
memmove(sanitized, sanitized + len, total - len);
}
return sanitized;
}
char *prefix_path(const char *prefix, int len, const char *path)
{
char *r = prefix_path_gently(prefix, len, path);
if (!r)
die("'%s' is outside repository", path);
return r;
}
int path_inside_repo(const char *prefix, const char *path)
{
int len = prefix ? strlen(prefix) : 0;
char *r = prefix_path_gently(prefix, len, path);
if (r) {
free(r);
return 1;
}
return 0;
}
int check_filename(const char *prefix, const char *arg)
{
const char *name;
struct stat st;
name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
if (!lstat(name, &st))
return 1; /* file exists */
if (errno == ENOENT || errno == ENOTDIR)
return 0; /* file does not exist */
die_errno("failed to stat '%s'", arg);
}
static void NORETURN die_verify_filename(const char *prefix,
const char *arg,
int diagnose_misspelt_rev)
{
if (!diagnose_misspelt_rev)
die("%s: no such path in the working tree.\n"
"Use 'git <command> -- <path>...' to specify paths that do not exist locally.",
arg);
/*
* Saying "'(icase)foo' does not exist in the index" when the
* user gave us ":(icase)foo" is just stupid. A magic pathspec
* begins with a colon and is followed by a non-alnum; do not
* let maybe_die_on_misspelt_object_name() even trigger.
*/
if (!(arg[0] == ':' && !isalnum(arg[1])))
maybe_die_on_misspelt_object_name(arg, prefix);
/* ... or fall back the most general message. */
die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
"Use '--' to separate paths from revisions, like this:\n"
"'git <command> [<revision>...] -- [<file>...]'", arg);
}
/*
* Verify a filename that we got as an argument for a pathspec
* entry. Note that a filename that begins with "-" never verifies
* as true, because even if such a filename were to exist, we want
* it to be preceded by the "--" marker (or we want the user to
* use a format like "./-filename")
*
* The "diagnose_misspelt_rev" is used to provide a user-friendly
* diagnosis when dying upon finding that "name" is not a pathname.
* If set to 1, the diagnosis will try to diagnose "name" as an
* invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
* will only complain about an inexisting file.
*
* This function is typically called to check that a "file or rev"
* argument is unambiguous. In this case, the caller will want
* diagnose_misspelt_rev == 1 when verifying the first non-rev
* argument (which could have been a revision), and
* diagnose_misspelt_rev == 0 for the next ones (because we already
* saw a filename, there's not ambiguity anymore).
*/
void verify_filename(const char *prefix,
const char *arg,
int diagnose_misspelt_rev)
{
if (*arg == '-')
die("bad flag '%s' used after filename", arg);
if (check_filename(prefix, arg))
return;
die_verify_filename(prefix, arg, diagnose_misspelt_rev);
}
/*
* Opposite of the above: the command line did not have -- marker
* and we parsed the arg as a refname. It should not be interpretable
* as a filename.
*/
void verify_non_filename(const char *prefix, const char *arg)
{
if (!is_inside_work_tree() || is_inside_git_dir())
return;
if (*arg == '-')
return; /* flag */
if (!check_filename(prefix, arg))
return;
die("ambiguous argument '%s': both revision and filename\n"
"Use '--' to separate paths from revisions, like this:\n"
"'git <command> [<revision>...] -- [<file>...]'", arg);
}
magic pathspec: add tentative ":/path/from/top/level" pathspec support Support ":/" magic string that can be prefixed to a pathspec element to say "this names the path from the top-level of the working tree", when you are in the subdirectory. For example, you should be able to say: $ edit Makefile ;# top-level $ cd Documentation $ edit git.txt ;# in the subdirectory and then do one of three things, still inside the subdirectory: $ git add -u . ;# add only Documentation/git.txt $ git add -u :/ ;# add everything, including paths outside Documentation $ git add -u ;# whatever the default setting is. To truly support magic pathspec, the API needs to be restructured so that get_pathspec() and init_pathspec() are unified into one call. Currently, the former just prefixes the user supplied pathspec with the current subdirectory path, and the latter takes the output from the former and pre-parses them into a bit richer structure for easier handling. They should become a single API function that takes the current subdirectory path and the remainder of argv[] (after parsing --options and revision arguments from the command line) and returns an array of parsed pathspec elements, and "magic" should become attributes of struct pathspec_item. This patch implements only "top" magic because it can be hacked into the system without such a refactoring. The syntax for magic pathspec prefix is designed to be extensible yet simple to type to invoke a simple magic like "from the top". The parser for the magic prefix is hooked into get_pathspec() function in this patch, and it needs to be moved when we refactor the API. But we have to start from somewhere. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-04-06 23:11:56 +00:00
/*
* Magic pathspec
*
* NEEDSWORK: These need to be moved to dir.h or even to a new
* pathspec.h when we restructure get_pathspec() users to use the
* "struct pathspec" interface.
*
* Possible future magic semantics include stuff like:
*
* { PATHSPEC_NOGLOB, '!', "noglob" },
* { PATHSPEC_ICASE, '\0', "icase" },
magic pathspec: add tentative ":/path/from/top/level" pathspec support Support ":/" magic string that can be prefixed to a pathspec element to say "this names the path from the top-level of the working tree", when you are in the subdirectory. For example, you should be able to say: $ edit Makefile ;# top-level $ cd Documentation $ edit git.txt ;# in the subdirectory and then do one of three things, still inside the subdirectory: $ git add -u . ;# add only Documentation/git.txt $ git add -u :/ ;# add everything, including paths outside Documentation $ git add -u ;# whatever the default setting is. To truly support magic pathspec, the API needs to be restructured so that get_pathspec() and init_pathspec() are unified into one call. Currently, the former just prefixes the user supplied pathspec with the current subdirectory path, and the latter takes the output from the former and pre-parses them into a bit richer structure for easier handling. They should become a single API function that takes the current subdirectory path and the remainder of argv[] (after parsing --options and revision arguments from the command line) and returns an array of parsed pathspec elements, and "magic" should become attributes of struct pathspec_item. This patch implements only "top" magic because it can be hacked into the system without such a refactoring. The syntax for magic pathspec prefix is designed to be extensible yet simple to type to invoke a simple magic like "from the top". The parser for the magic prefix is hooked into get_pathspec() function in this patch, and it needs to be moved when we refactor the API. But we have to start from somewhere. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-04-06 23:11:56 +00:00
* { PATHSPEC_RECURSIVE, '*', "recursive" },
* { PATHSPEC_REGEXP, '\0', "regexp" },
*
*/
#define PATHSPEC_FROMTOP (1<<0)
static struct pathspec_magic {
magic pathspec: add tentative ":/path/from/top/level" pathspec support Support ":/" magic string that can be prefixed to a pathspec element to say "this names the path from the top-level of the working tree", when you are in the subdirectory. For example, you should be able to say: $ edit Makefile ;# top-level $ cd Documentation $ edit git.txt ;# in the subdirectory and then do one of three things, still inside the subdirectory: $ git add -u . ;# add only Documentation/git.txt $ git add -u :/ ;# add everything, including paths outside Documentation $ git add -u ;# whatever the default setting is. To truly support magic pathspec, the API needs to be restructured so that get_pathspec() and init_pathspec() are unified into one call. Currently, the former just prefixes the user supplied pathspec with the current subdirectory path, and the latter takes the output from the former and pre-parses them into a bit richer structure for easier handling. They should become a single API function that takes the current subdirectory path and the remainder of argv[] (after parsing --options and revision arguments from the command line) and returns an array of parsed pathspec elements, and "magic" should become attributes of struct pathspec_item. This patch implements only "top" magic because it can be hacked into the system without such a refactoring. The syntax for magic pathspec prefix is designed to be extensible yet simple to type to invoke a simple magic like "from the top". The parser for the magic prefix is hooked into get_pathspec() function in this patch, and it needs to be moved when we refactor the API. But we have to start from somewhere. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-04-06 23:11:56 +00:00
unsigned bit;
char mnemonic; /* this cannot be ':'! */
const char *name;
} pathspec_magic[] = {
{ PATHSPEC_FROMTOP, '/', "top" },
};
/*
* Take an element of a pathspec and check for magic signatures.
* Append the result to the prefix.
*
* For now, we only parse the syntax and throw out anything other than
* "top" magic.
*
* NEEDSWORK: This needs to be rewritten when we start migrating
* get_pathspec() users to use the "struct pathspec" interface. For
* example, a pathspec element may be marked as case-insensitive, but
* the prefix part must always match literally, and a single stupid
* string cannot express such a case.
*/
static const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt)
magic pathspec: add tentative ":/path/from/top/level" pathspec support Support ":/" magic string that can be prefixed to a pathspec element to say "this names the path from the top-level of the working tree", when you are in the subdirectory. For example, you should be able to say: $ edit Makefile ;# top-level $ cd Documentation $ edit git.txt ;# in the subdirectory and then do one of three things, still inside the subdirectory: $ git add -u . ;# add only Documentation/git.txt $ git add -u :/ ;# add everything, including paths outside Documentation $ git add -u ;# whatever the default setting is. To truly support magic pathspec, the API needs to be restructured so that get_pathspec() and init_pathspec() are unified into one call. Currently, the former just prefixes the user supplied pathspec with the current subdirectory path, and the latter takes the output from the former and pre-parses them into a bit richer structure for easier handling. They should become a single API function that takes the current subdirectory path and the remainder of argv[] (after parsing --options and revision arguments from the command line) and returns an array of parsed pathspec elements, and "magic" should become attributes of struct pathspec_item. This patch implements only "top" magic because it can be hacked into the system without such a refactoring. The syntax for magic pathspec prefix is designed to be extensible yet simple to type to invoke a simple magic like "from the top". The parser for the magic prefix is hooked into get_pathspec() function in this patch, and it needs to be moved when we refactor the API. But we have to start from somewhere. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-04-06 23:11:56 +00:00
{
unsigned magic = 0;
const char *copyfrom = elt;
int i;
magic pathspec: add tentative ":/path/from/top/level" pathspec support Support ":/" magic string that can be prefixed to a pathspec element to say "this names the path from the top-level of the working tree", when you are in the subdirectory. For example, you should be able to say: $ edit Makefile ;# top-level $ cd Documentation $ edit git.txt ;# in the subdirectory and then do one of three things, still inside the subdirectory: $ git add -u . ;# add only Documentation/git.txt $ git add -u :/ ;# add everything, including paths outside Documentation $ git add -u ;# whatever the default setting is. To truly support magic pathspec, the API needs to be restructured so that get_pathspec() and init_pathspec() are unified into one call. Currently, the former just prefixes the user supplied pathspec with the current subdirectory path, and the latter takes the output from the former and pre-parses them into a bit richer structure for easier handling. They should become a single API function that takes the current subdirectory path and the remainder of argv[] (after parsing --options and revision arguments from the command line) and returns an array of parsed pathspec elements, and "magic" should become attributes of struct pathspec_item. This patch implements only "top" magic because it can be hacked into the system without such a refactoring. The syntax for magic pathspec prefix is designed to be extensible yet simple to type to invoke a simple magic like "from the top". The parser for the magic prefix is hooked into get_pathspec() function in this patch, and it needs to be moved when we refactor the API. But we have to start from somewhere. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-04-06 23:11:56 +00:00
if (elt[0] != ':') {
; /* nothing to do */
} else if (elt[1] == '(') {
/* longhand */
const char *nextat;
for (copyfrom = elt + 2;
*copyfrom && *copyfrom != ')';
copyfrom = nextat) {
size_t len = strcspn(copyfrom, ",)");
if (copyfrom[len] == ')')
nextat = copyfrom + len;
else
nextat = copyfrom + len + 1;
if (!len)
continue;
for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
if (strlen(pathspec_magic[i].name) == len &&
!strncmp(pathspec_magic[i].name, copyfrom, len)) {
magic |= pathspec_magic[i].bit;
break;
}
if (ARRAY_SIZE(pathspec_magic) <= i)
die("Invalid pathspec magic '%.*s' in '%s'",
(int) len, copyfrom, elt);
}
if (*copyfrom == ')')
copyfrom++;
} else {
/* shorthand */
for (copyfrom = elt + 1;
*copyfrom && *copyfrom != ':';
copyfrom++) {
char ch = *copyfrom;
if (!is_pathspec_magic(ch))
break;
magic pathspec: add tentative ":/path/from/top/level" pathspec support Support ":/" magic string that can be prefixed to a pathspec element to say "this names the path from the top-level of the working tree", when you are in the subdirectory. For example, you should be able to say: $ edit Makefile ;# top-level $ cd Documentation $ edit git.txt ;# in the subdirectory and then do one of three things, still inside the subdirectory: $ git add -u . ;# add only Documentation/git.txt $ git add -u :/ ;# add everything, including paths outside Documentation $ git add -u ;# whatever the default setting is. To truly support magic pathspec, the API needs to be restructured so that get_pathspec() and init_pathspec() are unified into one call. Currently, the former just prefixes the user supplied pathspec with the current subdirectory path, and the latter takes the output from the former and pre-parses them into a bit richer structure for easier handling. They should become a single API function that takes the current subdirectory path and the remainder of argv[] (after parsing --options and revision arguments from the command line) and returns an array of parsed pathspec elements, and "magic" should become attributes of struct pathspec_item. This patch implements only "top" magic because it can be hacked into the system without such a refactoring. The syntax for magic pathspec prefix is designed to be extensible yet simple to type to invoke a simple magic like "from the top". The parser for the magic prefix is hooked into get_pathspec() function in this patch, and it needs to be moved when we refactor the API. But we have to start from somewhere. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-04-06 23:11:56 +00:00
for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
if (pathspec_magic[i].mnemonic == ch) {
magic |= pathspec_magic[i].bit;
break;
}
if (ARRAY_SIZE(pathspec_magic) <= i)
die("Unimplemented pathspec magic '%c' in '%s'",
ch, elt);
magic pathspec: add tentative ":/path/from/top/level" pathspec support Support ":/" magic string that can be prefixed to a pathspec element to say "this names the path from the top-level of the working tree", when you are in the subdirectory. For example, you should be able to say: $ edit Makefile ;# top-level $ cd Documentation $ edit git.txt ;# in the subdirectory and then do one of three things, still inside the subdirectory: $ git add -u . ;# add only Documentation/git.txt $ git add -u :/ ;# add everything, including paths outside Documentation $ git add -u ;# whatever the default setting is. To truly support magic pathspec, the API needs to be restructured so that get_pathspec() and init_pathspec() are unified into one call. Currently, the former just prefixes the user supplied pathspec with the current subdirectory path, and the latter takes the output from the former and pre-parses them into a bit richer structure for easier handling. They should become a single API function that takes the current subdirectory path and the remainder of argv[] (after parsing --options and revision arguments from the command line) and returns an array of parsed pathspec elements, and "magic" should become attributes of struct pathspec_item. This patch implements only "top" magic because it can be hacked into the system without such a refactoring. The syntax for magic pathspec prefix is designed to be extensible yet simple to type to invoke a simple magic like "from the top". The parser for the magic prefix is hooked into get_pathspec() function in this patch, and it needs to be moved when we refactor the API. But we have to start from somewhere. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-04-06 23:11:56 +00:00
}
if (*copyfrom == ':')
copyfrom++;
}
if (magic & PATHSPEC_FROMTOP)
return xstrdup(copyfrom);
magic pathspec: add tentative ":/path/from/top/level" pathspec support Support ":/" magic string that can be prefixed to a pathspec element to say "this names the path from the top-level of the working tree", when you are in the subdirectory. For example, you should be able to say: $ edit Makefile ;# top-level $ cd Documentation $ edit git.txt ;# in the subdirectory and then do one of three things, still inside the subdirectory: $ git add -u . ;# add only Documentation/git.txt $ git add -u :/ ;# add everything, including paths outside Documentation $ git add -u ;# whatever the default setting is. To truly support magic pathspec, the API needs to be restructured so that get_pathspec() and init_pathspec() are unified into one call. Currently, the former just prefixes the user supplied pathspec with the current subdirectory path, and the latter takes the output from the former and pre-parses them into a bit richer structure for easier handling. They should become a single API function that takes the current subdirectory path and the remainder of argv[] (after parsing --options and revision arguments from the command line) and returns an array of parsed pathspec elements, and "magic" should become attributes of struct pathspec_item. This patch implements only "top" magic because it can be hacked into the system without such a refactoring. The syntax for magic pathspec prefix is designed to be extensible yet simple to type to invoke a simple magic like "from the top". The parser for the magic prefix is hooked into get_pathspec() function in this patch, and it needs to be moved when we refactor the API. But we have to start from somewhere. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-04-06 23:11:56 +00:00
else
return prefix_path(prefix, prefixlen, copyfrom);
magic pathspec: add tentative ":/path/from/top/level" pathspec support Support ":/" magic string that can be prefixed to a pathspec element to say "this names the path from the top-level of the working tree", when you are in the subdirectory. For example, you should be able to say: $ edit Makefile ;# top-level $ cd Documentation $ edit git.txt ;# in the subdirectory and then do one of three things, still inside the subdirectory: $ git add -u . ;# add only Documentation/git.txt $ git add -u :/ ;# add everything, including paths outside Documentation $ git add -u ;# whatever the default setting is. To truly support magic pathspec, the API needs to be restructured so that get_pathspec() and init_pathspec() are unified into one call. Currently, the former just prefixes the user supplied pathspec with the current subdirectory path, and the latter takes the output from the former and pre-parses them into a bit richer structure for easier handling. They should become a single API function that takes the current subdirectory path and the remainder of argv[] (after parsing --options and revision arguments from the command line) and returns an array of parsed pathspec elements, and "magic" should become attributes of struct pathspec_item. This patch implements only "top" magic because it can be hacked into the system without such a refactoring. The syntax for magic pathspec prefix is designed to be extensible yet simple to type to invoke a simple magic like "from the top". The parser for the magic prefix is hooked into get_pathspec() function in this patch, and it needs to be moved when we refactor the API. But we have to start from somewhere. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-04-06 23:11:56 +00:00
}
const char **get_pathspec(const char *prefix, const char **pathspec)
{
const char *entry = *pathspec;
setup: sanitize absolute and funny paths in get_pathspec() The prefix_path() function called from get_pathspec() is responsible for translating list of user-supplied pathspecs to list of pathspecs that is relative to the root of the work tree. When working inside a subdirectory, the user-supplied pathspecs are taken to be relative to the current subdirectory. Among special path components in pathspecs, we used to accept and interpret only "." ("the directory", meaning a no-op) and ".." ("up one level") at the beginning. Everything else was passed through as-is. For example, if you are in Documentation/ directory of the project, you can name Documentation/howto/maintain-git.txt as: howto/maintain-git.txt ../Documentation/howto/maitain-git.txt ../././Documentation/howto/maitain-git.txt but not as: howto/./maintain-git.txt $(pwd)/howto/maintain-git.txt This patch updates prefix_path() in several ways: - If the pathspec is not absolute, prefix (i.e. the current subdirectory relative to the root of the work tree, with terminating slash, if not empty) and the pathspec is concatenated first and used in the next step. Otherwise, that absolute pathspec is used in the next step. - Then special path components "." (no-op) and ".." (up one level) are interpreted to simplify the path. It is an error to have too many ".." to cause the intermediate result to step outside of the input to this step. - If the original pathspec was not absolute, the result from the previous step is the resulting "sanitized" pathspec. Otherwise, the result from the previous step is still absolute, and it is an error if it does not begin with the directory that corresponds to the root of the work tree. The directory is stripped away from the result and is returned. - In any case, the resulting pathspec in the array get_pathspec() returns omit the ones that caused errors. With this patch, the last two examples also behave as expected. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-29 06:44:27 +00:00
const char **src, **dst;
int prefixlen;
if (!prefix && !entry)
return NULL;
if (!entry) {
static const char *spec[2];
spec[0] = prefix;
spec[1] = NULL;
return spec;
}
/* Otherwise we have to re-write the entries.. */
setup: sanitize absolute and funny paths in get_pathspec() The prefix_path() function called from get_pathspec() is responsible for translating list of user-supplied pathspecs to list of pathspecs that is relative to the root of the work tree. When working inside a subdirectory, the user-supplied pathspecs are taken to be relative to the current subdirectory. Among special path components in pathspecs, we used to accept and interpret only "." ("the directory", meaning a no-op) and ".." ("up one level") at the beginning. Everything else was passed through as-is. For example, if you are in Documentation/ directory of the project, you can name Documentation/howto/maintain-git.txt as: howto/maintain-git.txt ../Documentation/howto/maitain-git.txt ../././Documentation/howto/maitain-git.txt but not as: howto/./maintain-git.txt $(pwd)/howto/maintain-git.txt This patch updates prefix_path() in several ways: - If the pathspec is not absolute, prefix (i.e. the current subdirectory relative to the root of the work tree, with terminating slash, if not empty) and the pathspec is concatenated first and used in the next step. Otherwise, that absolute pathspec is used in the next step. - Then special path components "." (no-op) and ".." (up one level) are interpreted to simplify the path. It is an error to have too many ".." to cause the intermediate result to step outside of the input to this step. - If the original pathspec was not absolute, the result from the previous step is the resulting "sanitized" pathspec. Otherwise, the result from the previous step is still absolute, and it is an error if it does not begin with the directory that corresponds to the root of the work tree. The directory is stripped away from the result and is returned. - In any case, the resulting pathspec in the array get_pathspec() returns omit the ones that caused errors. With this patch, the last two examples also behave as expected. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-29 06:44:27 +00:00
src = pathspec;
dst = pathspec;
prefixlen = prefix ? strlen(prefix) : 0;
setup: sanitize absolute and funny paths in get_pathspec() The prefix_path() function called from get_pathspec() is responsible for translating list of user-supplied pathspecs to list of pathspecs that is relative to the root of the work tree. When working inside a subdirectory, the user-supplied pathspecs are taken to be relative to the current subdirectory. Among special path components in pathspecs, we used to accept and interpret only "." ("the directory", meaning a no-op) and ".." ("up one level") at the beginning. Everything else was passed through as-is. For example, if you are in Documentation/ directory of the project, you can name Documentation/howto/maintain-git.txt as: howto/maintain-git.txt ../Documentation/howto/maitain-git.txt ../././Documentation/howto/maitain-git.txt but not as: howto/./maintain-git.txt $(pwd)/howto/maintain-git.txt This patch updates prefix_path() in several ways: - If the pathspec is not absolute, prefix (i.e. the current subdirectory relative to the root of the work tree, with terminating slash, if not empty) and the pathspec is concatenated first and used in the next step. Otherwise, that absolute pathspec is used in the next step. - Then special path components "." (no-op) and ".." (up one level) are interpreted to simplify the path. It is an error to have too many ".." to cause the intermediate result to step outside of the input to this step. - If the original pathspec was not absolute, the result from the previous step is the resulting "sanitized" pathspec. Otherwise, the result from the previous step is still absolute, and it is an error if it does not begin with the directory that corresponds to the root of the work tree. The directory is stripped away from the result and is returned. - In any case, the resulting pathspec in the array get_pathspec() returns omit the ones that caused errors. With this patch, the last two examples also behave as expected. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-29 06:44:27 +00:00
while (*src) {
magic pathspec: add tentative ":/path/from/top/level" pathspec support Support ":/" magic string that can be prefixed to a pathspec element to say "this names the path from the top-level of the working tree", when you are in the subdirectory. For example, you should be able to say: $ edit Makefile ;# top-level $ cd Documentation $ edit git.txt ;# in the subdirectory and then do one of three things, still inside the subdirectory: $ git add -u . ;# add only Documentation/git.txt $ git add -u :/ ;# add everything, including paths outside Documentation $ git add -u ;# whatever the default setting is. To truly support magic pathspec, the API needs to be restructured so that get_pathspec() and init_pathspec() are unified into one call. Currently, the former just prefixes the user supplied pathspec with the current subdirectory path, and the latter takes the output from the former and pre-parses them into a bit richer structure for easier handling. They should become a single API function that takes the current subdirectory path and the remainder of argv[] (after parsing --options and revision arguments from the command line) and returns an array of parsed pathspec elements, and "magic" should become attributes of struct pathspec_item. This patch implements only "top" magic because it can be hacked into the system without such a refactoring. The syntax for magic pathspec prefix is designed to be extensible yet simple to type to invoke a simple magic like "from the top". The parser for the magic prefix is hooked into get_pathspec() function in this patch, and it needs to be moved when we refactor the API. But we have to start from somewhere. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-04-06 23:11:56 +00:00
*(dst++) = prefix_pathspec(prefix, prefixlen, *src);
setup: sanitize absolute and funny paths in get_pathspec() The prefix_path() function called from get_pathspec() is responsible for translating list of user-supplied pathspecs to list of pathspecs that is relative to the root of the work tree. When working inside a subdirectory, the user-supplied pathspecs are taken to be relative to the current subdirectory. Among special path components in pathspecs, we used to accept and interpret only "." ("the directory", meaning a no-op) and ".." ("up one level") at the beginning. Everything else was passed through as-is. For example, if you are in Documentation/ directory of the project, you can name Documentation/howto/maintain-git.txt as: howto/maintain-git.txt ../Documentation/howto/maitain-git.txt ../././Documentation/howto/maitain-git.txt but not as: howto/./maintain-git.txt $(pwd)/howto/maintain-git.txt This patch updates prefix_path() in several ways: - If the pathspec is not absolute, prefix (i.e. the current subdirectory relative to the root of the work tree, with terminating slash, if not empty) and the pathspec is concatenated first and used in the next step. Otherwise, that absolute pathspec is used in the next step. - Then special path components "." (no-op) and ".." (up one level) are interpreted to simplify the path. It is an error to have too many ".." to cause the intermediate result to step outside of the input to this step. - If the original pathspec was not absolute, the result from the previous step is the resulting "sanitized" pathspec. Otherwise, the result from the previous step is still absolute, and it is an error if it does not begin with the directory that corresponds to the root of the work tree. The directory is stripped away from the result and is returned. - In any case, the resulting pathspec in the array get_pathspec() returns omit the ones that caused errors. With this patch, the last two examples also behave as expected. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-29 06:44:27 +00:00
src++;
}
*dst = NULL;
if (!*pathspec)
return NULL;
return pathspec;
}
/*
* Test if it looks like we're at a git directory.
* We want to see:
*
* - either an objects/ directory _or_ the proper
* GIT_OBJECT_DIRECTORY environment variable
* - a refs/ directory
* - either a HEAD symlink or a HEAD file that is formatted as
* a proper "ref:", or a regular file HEAD that has a properly
* formatted sha1 object name.
*/
standardize and improve lookup rules for external local repos When you specify a local repository on the command line of clone, ls-remote, upload-pack, receive-pack, or upload-archive, or in a request to git-daemon, we perform a little bit of lookup magic, doing things like looking in working trees for .git directories and appending ".git" for bare repos. For clone, this magic happens in get_repo_path. For everything else, it happens in enter_repo. In both cases, there are some ambiguous or confusing cases that aren't handled well, and there is one case that is not handled the same by both methods. This patch tries to provide (and test!) standard, sensible lookup rules for both code paths. The intended changes are: 1. When looking up "foo", we have always preferred a working tree "foo" (containing "foo/.git" over the bare "foo.git". But we did not prefer a bare "foo" over "foo.git". With this patch, we do so. 2. We would select directories that existed but didn't actually look like git repositories. With this patch, we make sure a selected directory looks like a git repo. Not only is this more sensible in general, but it will help anybody who is negatively affected by change (1) negatively (e.g., if they had "foo.git" next to its separate work tree "foo", and expect to keep finding "foo.git" when they reference "foo"). 3. The enter_repo code path would, given "foo", look for "foo.git/.git" (i.e., do the ".git" append magic even for a repo with working tree). The clone code path did not; with this patch, they now behave the same. In the unlikely case of a working tree overlaying a bare repo (i.e., a ".git" directory _inside_ a bare repo), we continue to treat it as a working tree (prefering the "inner" .git over the bare repo). This is mainly because the combination seems nonsensical, and I'd rather stick with existing behavior on the off chance that somebody is relying on it. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-02 21:59:13 +00:00
int is_git_directory(const char *suspect)
{
char path[PATH_MAX];
size_t len = strlen(suspect);
if (PATH_MAX <= len + strlen("/objects"))
die("Too long path: %.*s", 60, suspect);
strcpy(path, suspect);
if (getenv(DB_ENVIRONMENT)) {
if (access(getenv(DB_ENVIRONMENT), X_OK))
return 0;
}
else {
strcpy(path + len, "/objects");
if (access(path, X_OK))
return 0;
}
strcpy(path + len, "/refs");
if (access(path, X_OK))
return 0;
strcpy(path + len, "/HEAD");
if (validate_headref(path))
return 0;
return 1;
}
int is_inside_git_dir(void)
{
Clean up work-tree handling The old version of work-tree support was an unholy mess, barely readable, and not to the point. For example, why do you have to provide a worktree, when it is not used? As in "git status". Now it works. Another riddle was: if you can have work trees inside the git dir, why are some programs complaining that they need a work tree? IOW it is allowed to call $ git --git-dir=../ --work-tree=. bla when you really want to. In this case, you are both in the git directory and in the working tree. So, programs have to actually test for the right thing, namely if they are inside a working tree, and not if they are inside a git directory. Also, GIT_DIR=../.git should behave the same as if no GIT_DIR was specified, unless there is a repository in the current working directory. It does now. The logic to determine if a repository is bare, or has a work tree (tertium non datur), is this: --work-tree=bla overrides GIT_WORK_TREE, which overrides core.bare = true, which overrides core.worktree, which overrides GIT_DIR/.. when GIT_DIR ends in /.git, which overrides the directory in which .git/ was found. In related news, a long standing bug was fixed: when in .git/bla/x.git/, which is a bare repository, git formerly assumed ../.. to be the appropriate git dir. This problem was reported by Shawn Pearce to have caused much pain, where a colleague mistakenly ran "git init" in "/" a long time ago, and bare repositories just would not work. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-01 00:30:14 +00:00
if (inside_git_dir < 0)
inside_git_dir = is_inside_dir(get_git_dir());
return inside_git_dir;
introduce GIT_WORK_TREE to specify the work tree setup_gdg is used as abbreviation for setup_git_directory_gently. The work tree can be specified using the environment variable GIT_WORK_TREE and the config option core.worktree (the environment variable has precendence over the config option). Additionally there is a command line option --work-tree which sets the environment variable. setup_gdg does the following now: GIT_DIR unspecified repository in .git directory parent directory of the .git directory is used as work tree, GIT_WORK_TREE is ignored GIT_DIR unspecified repository in cwd GIT_DIR is set to cwd see the cases with GIT_DIR specified what happens next and also see the note below GIT_DIR specified GIT_WORK_TREE/core.worktree unspecified cwd is used as work tree GIT_DIR specified GIT_WORK_TREE/core.worktree specified the specified work tree is used Note on the case where GIT_DIR is unspecified and repository is in cwd: GIT_WORK_TREE is used but is_inside_git_dir is always true. I did it this way because setup_gdg might be called multiple times (e.g. when doing alias expansion) and in successive calls setup_gdg should do the same thing every time. Meaning of is_bare/is_inside_work_tree/is_inside_git_dir: (1) is_bare_repository A repository is bare if core.bare is true or core.bare is unspecified and the name suggests it is bare (directory not named .git). The bare option disables a few protective checks which are useful with a working tree. Currently this changes if a repository is bare: updates of HEAD are allowed git gc packs the refs the reflog is disabled by default (2) is_inside_work_tree True if the cwd is inside the associated working tree (if there is one), false otherwise. (3) is_inside_git_dir True if the cwd is inside the git directory, false otherwise. Before this patch is_inside_git_dir was always true for bare repositories. When setup_gdg finds a repository git_config(git_default_config) is always called. This ensure that is_bare_repository makes use of core.bare and does not guess even though core.bare is specified. inside_work_tree and inside_git_dir are set if setup_gdg finds a repository. The is_inside_work_tree and is_inside_git_dir functions will die if they are called before a successful call to setup_gdg. Signed-off-by: Matthias Lederhofer <matled@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-06 07:10:42 +00:00
}
int is_inside_work_tree(void)
{
Clean up work-tree handling The old version of work-tree support was an unholy mess, barely readable, and not to the point. For example, why do you have to provide a worktree, when it is not used? As in "git status". Now it works. Another riddle was: if you can have work trees inside the git dir, why are some programs complaining that they need a work tree? IOW it is allowed to call $ git --git-dir=../ --work-tree=. bla when you really want to. In this case, you are both in the git directory and in the working tree. So, programs have to actually test for the right thing, namely if they are inside a working tree, and not if they are inside a git directory. Also, GIT_DIR=../.git should behave the same as if no GIT_DIR was specified, unless there is a repository in the current working directory. It does now. The logic to determine if a repository is bare, or has a work tree (tertium non datur), is this: --work-tree=bla overrides GIT_WORK_TREE, which overrides core.bare = true, which overrides core.worktree, which overrides GIT_DIR/.. when GIT_DIR ends in /.git, which overrides the directory in which .git/ was found. In related news, a long standing bug was fixed: when in .git/bla/x.git/, which is a bare repository, git formerly assumed ../.. to be the appropriate git dir. This problem was reported by Shawn Pearce to have caused much pain, where a colleague mistakenly ran "git init" in "/" a long time ago, and bare repositories just would not work. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-01 00:30:14 +00:00
if (inside_work_tree < 0)
inside_work_tree = is_inside_dir(get_git_work_tree());
return inside_work_tree;
introduce GIT_WORK_TREE to specify the work tree setup_gdg is used as abbreviation for setup_git_directory_gently. The work tree can be specified using the environment variable GIT_WORK_TREE and the config option core.worktree (the environment variable has precendence over the config option). Additionally there is a command line option --work-tree which sets the environment variable. setup_gdg does the following now: GIT_DIR unspecified repository in .git directory parent directory of the .git directory is used as work tree, GIT_WORK_TREE is ignored GIT_DIR unspecified repository in cwd GIT_DIR is set to cwd see the cases with GIT_DIR specified what happens next and also see the note below GIT_DIR specified GIT_WORK_TREE/core.worktree unspecified cwd is used as work tree GIT_DIR specified GIT_WORK_TREE/core.worktree specified the specified work tree is used Note on the case where GIT_DIR is unspecified and repository is in cwd: GIT_WORK_TREE is used but is_inside_git_dir is always true. I did it this way because setup_gdg might be called multiple times (e.g. when doing alias expansion) and in successive calls setup_gdg should do the same thing every time. Meaning of is_bare/is_inside_work_tree/is_inside_git_dir: (1) is_bare_repository A repository is bare if core.bare is true or core.bare is unspecified and the name suggests it is bare (directory not named .git). The bare option disables a few protective checks which are useful with a working tree. Currently this changes if a repository is bare: updates of HEAD are allowed git gc packs the refs the reflog is disabled by default (2) is_inside_work_tree True if the cwd is inside the associated working tree (if there is one), false otherwise. (3) is_inside_git_dir True if the cwd is inside the git directory, false otherwise. Before this patch is_inside_git_dir was always true for bare repositories. When setup_gdg finds a repository git_config(git_default_config) is always called. This ensure that is_bare_repository makes use of core.bare and does not guess even though core.bare is specified. inside_work_tree and inside_git_dir are set if setup_gdg finds a repository. The is_inside_work_tree and is_inside_git_dir functions will die if they are called before a successful call to setup_gdg. Signed-off-by: Matthias Lederhofer <matled@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-06 07:10:42 +00:00
}
void setup_work_tree(void)
{
const char *work_tree, *git_dir;
static int initialized = 0;
if (initialized)
return;
work_tree = get_git_work_tree();
git_dir = get_git_dir();
if (!is_absolute_path(git_dir))
git_dir = real_path(get_git_dir());
if (!work_tree || chdir(work_tree))
die("This operation must be run in a work tree");
/*
* Make sure subsequent git processes find correct worktree
* if $GIT_WORK_TREE is set relative
*/
if (getenv(GIT_WORK_TREE_ENVIRONMENT))
setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
set_git_dir(relative_path(git_dir, work_tree));
initialized = 1;
}
static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
{
char repo_config[PATH_MAX+1];
/*
* git_config() can't be used here because it calls git_pathdup()
* to get $GIT_CONFIG/config. That call will make setup_git_env()
* set git_dir to ".git".
*
* We are in gitdir setup, no git dir has been found useable yet.
* Use a gentler version of git_config() to check if this repo
* is a good one.
*/
snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
git_config_early(check_repository_format_version, NULL, repo_config);
if (GIT_REPO_VERSION < repository_format_version) {
if (!nongit_ok)
die ("Expected git repo version <= %d, found %d",
GIT_REPO_VERSION, repository_format_version);
warning("Expected git repo version <= %d, found %d",
GIT_REPO_VERSION, repository_format_version);
warning("Please upgrade Git");
*nongit_ok = -1;
return -1;
}
return 0;
}
/*
* Try to read the location of the git directory from the .git file,
* return path to git directory if found.
*/
const char *read_gitfile(const char *path)
{
char *buf;
char *dir;
const char *slash;
struct stat st;
int fd;
ssize_t len;
if (stat(path, &st))
return NULL;
if (!S_ISREG(st.st_mode))
return NULL;
fd = open(path, O_RDONLY);
if (fd < 0)
die_errno("Error opening '%s'", path);
buf = xmalloc(st.st_size + 1);
len = read_in_full(fd, buf, st.st_size);
close(fd);
if (len != st.st_size)
die("Error reading %s", path);
buf[len] = '\0';
if (prefixcmp(buf, "gitdir: "))
die("Invalid gitfile format: %s", path);
while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
len--;
if (len < 9)
die("No path in gitfile: %s", path);
buf[len] = '\0';
dir = buf + 8;
if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
size_t pathlen = slash+1 - path;
size_t dirlen = pathlen + len - 8;
dir = xmalloc(dirlen + 1);
strncpy(dir, path, pathlen);
strncpy(dir + pathlen, buf + 8, len - 8);
dir[dirlen] = '\0';
free(buf);
buf = dir;
}
if (!is_git_directory(dir))
die("Not a git repository: %s", dir);
path = real_path(dir);
free(buf);
return path;
}
static const char *setup_explicit_git_dir(const char *gitdirenv,
char *cwd, int len,
int *nongit_ok)
{
const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
const char *worktree;
char *gitfile;
int offset;
if (PATH_MAX - 40 < strlen(gitdirenv))
die("'$%s' too big", GIT_DIR_ENVIRONMENT);
gitfile = (char*)read_gitfile(gitdirenv);
if (gitfile) {
gitfile = xstrdup(gitfile);
gitdirenv = gitfile;
}
if (!is_git_directory(gitdirenv)) {
if (nongit_ok) {
*nongit_ok = 1;
free(gitfile);
return NULL;
}
die("Not a git repository: '%s'", gitdirenv);
}
if (check_repository_format_gently(gitdirenv, nongit_ok)) {
free(gitfile);
return NULL;
}
/* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
if (work_tree_env)
set_git_work_tree(work_tree_env);
else if (is_bare_repository_cfg > 0) {
if (git_work_tree_cfg) /* #22.2, #30 */
die("core.bare and core.worktree do not make sense");
/* #18, #26 */
set_git_dir(gitdirenv);
free(gitfile);
return NULL;
}
else if (git_work_tree_cfg) { /* #6, #14 */
if (is_absolute_path(git_work_tree_cfg))
set_git_work_tree(git_work_tree_cfg);
else {
char core_worktree[PATH_MAX];
if (chdir(gitdirenv))
die_errno("Could not chdir to '%s'", gitdirenv);
if (chdir(git_work_tree_cfg))
die_errno("Could not chdir to '%s'", git_work_tree_cfg);
if (!getcwd(core_worktree, PATH_MAX))
die_errno("Could not get directory '%s'", git_work_tree_cfg);
if (chdir(cwd))
die_errno("Could not come back to cwd");
set_git_work_tree(core_worktree);
}
}
else /* #2, #10 */
set_git_work_tree(".");
/* set_git_work_tree() must have been called by now */
worktree = get_git_work_tree();
/* both get_git_work_tree() and cwd are already normalized */
if (!strcmp(cwd, worktree)) { /* cwd == worktree */
set_git_dir(gitdirenv);
free(gitfile);
return NULL;
}
offset = dir_inside_of(cwd, worktree);
if (offset >= 0) { /* cwd inside worktree? */
set_git_dir(real_path(gitdirenv));
if (chdir(worktree))
die_errno("Could not chdir to '%s'", worktree);
cwd[len++] = '/';
cwd[len] = '\0';
free(gitfile);
return cwd + offset;
}
/* cwd outside worktree */
set_git_dir(gitdirenv);
free(gitfile);
return NULL;
}
static const char *setup_discovered_git_dir(const char *gitdir,
char *cwd, int offset, int len,
int *nongit_ok)
{
if (check_repository_format_gently(gitdir, nongit_ok))
return NULL;
/* --work-tree is set without --git-dir; use discovered one */
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
if (offset != len && !is_absolute_path(gitdir))
gitdir = xstrdup(real_path(gitdir));
if (chdir(cwd))
die_errno("Could not come back to cwd");
return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
}
/* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
if (is_bare_repository_cfg > 0) {
set_git_dir(offset == len ? gitdir : real_path(gitdir));
if (chdir(cwd))
die_errno("Could not come back to cwd");
return NULL;
}
/* #0, #1, #5, #8, #9, #12, #13 */
set_git_work_tree(".");
if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
set_git_dir(gitdir);
inside_git_dir = 0;
inside_work_tree = 1;
if (offset == len)
return NULL;
/* Make "offset" point to past the '/', and add a '/' at the end */
offset++;
cwd[len++] = '/';
cwd[len] = 0;
return cwd + offset;
}
/* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
{
int root_len;
if (check_repository_format_gently(".", nongit_ok))
return NULL;
/* --work-tree is set without --git-dir; use discovered one */
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
const char *gitdir;
gitdir = offset == len ? "." : xmemdupz(cwd, offset);
if (chdir(cwd))
die_errno("Could not come back to cwd");
return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
}
inside_git_dir = 1;
inside_work_tree = 0;
if (offset != len) {
if (chdir(cwd))
die_errno("Cannot come back to cwd");
root_len = offset_1st_component(cwd);
cwd[offset > root_len ? offset : root_len] = '\0';
set_git_dir(cwd);
}
else
set_git_dir(".");
return NULL;
}
static const char *setup_nongit(const char *cwd, int *nongit_ok)
{
if (!nongit_ok)
die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
if (chdir(cwd))
die_errno("Cannot come back to cwd");
*nongit_ok = 1;
return NULL;
}
static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len)
{
struct stat buf;
if (stat(path, &buf)) {
die_errno("failed to stat '%*s%s%s'",
prefix_len,
prefix ? prefix : "",
prefix ? "/" : "", path);
}
return buf.st_dev;
}
longest_ancestor_length(): require prefix list entries to be normalized Move the responsibility for normalizing prefixes from longest_ancestor_length() to its callers. Use slightly different normalizations at the two callers: In setup_git_directory_gently_1(), use the old normalization, which ignores paths that are not usable. In the next commit we will change this caller to also resolve symlinks in the paths from GIT_CEILING_DIRECTORIES as part of the normalization. In "test-path-utils longest_ancestor_length", use the old normalization, but die() if any paths are unusable. Also change t0060 to only pass normalized paths to the test program (no empty entries or non-absolute paths, strip trailing slashes from the paths, and remove tests that thereby become redundant). The point of this change is to reduce the scope of the ancestor_length tests in t0060 from testing normalization+longest_prefix to testing only mostly longest_prefix. This is necessary because when setup_git_directory_gently_1() starts resolving symlinks as part of its normalization, it will not be reasonable to do the same in the test suite, because that would make the test results depend on the contents of the root directory of the filesystem on which the test is run. HOWEVER: under Windows, bash mangles arguments that look like absolute POSIX paths into DOS paths. So we have to retain the level of normalization done by normalize_path_copy() to convert the bash-mangled DOS paths (which contain backslashes) into paths that use forward slashes. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Jeff King <peff@peff.net>
2012-10-28 16:16:25 +00:00
/*
* A "string_list_each_func_t" function that canonicalizes an entry
* from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or
* discards it if unusable.
longest_ancestor_length(): require prefix list entries to be normalized Move the responsibility for normalizing prefixes from longest_ancestor_length() to its callers. Use slightly different normalizations at the two callers: In setup_git_directory_gently_1(), use the old normalization, which ignores paths that are not usable. In the next commit we will change this caller to also resolve symlinks in the paths from GIT_CEILING_DIRECTORIES as part of the normalization. In "test-path-utils longest_ancestor_length", use the old normalization, but die() if any paths are unusable. Also change t0060 to only pass normalized paths to the test program (no empty entries or non-absolute paths, strip trailing slashes from the paths, and remove tests that thereby become redundant). The point of this change is to reduce the scope of the ancestor_length tests in t0060 from testing normalization+longest_prefix to testing only mostly longest_prefix. This is necessary because when setup_git_directory_gently_1() starts resolving symlinks as part of its normalization, it will not be reasonable to do the same in the test suite, because that would make the test results depend on the contents of the root directory of the filesystem on which the test is run. HOWEVER: under Windows, bash mangles arguments that look like absolute POSIX paths into DOS paths. So we have to retain the level of normalization done by normalize_path_copy() to convert the bash-mangled DOS paths (which contain backslashes) into paths that use forward slashes. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Jeff King <peff@peff.net>
2012-10-28 16:16:25 +00:00
*/
static int canonicalize_ceiling_entry(struct string_list_item *item,
void *unused)
longest_ancestor_length(): require prefix list entries to be normalized Move the responsibility for normalizing prefixes from longest_ancestor_length() to its callers. Use slightly different normalizations at the two callers: In setup_git_directory_gently_1(), use the old normalization, which ignores paths that are not usable. In the next commit we will change this caller to also resolve symlinks in the paths from GIT_CEILING_DIRECTORIES as part of the normalization. In "test-path-utils longest_ancestor_length", use the old normalization, but die() if any paths are unusable. Also change t0060 to only pass normalized paths to the test program (no empty entries or non-absolute paths, strip trailing slashes from the paths, and remove tests that thereby become redundant). The point of this change is to reduce the scope of the ancestor_length tests in t0060 from testing normalization+longest_prefix to testing only mostly longest_prefix. This is necessary because when setup_git_directory_gently_1() starts resolving symlinks as part of its normalization, it will not be reasonable to do the same in the test suite, because that would make the test results depend on the contents of the root directory of the filesystem on which the test is run. HOWEVER: under Windows, bash mangles arguments that look like absolute POSIX paths into DOS paths. So we have to retain the level of normalization done by normalize_path_copy() to convert the bash-mangled DOS paths (which contain backslashes) into paths that use forward slashes. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Jeff King <peff@peff.net>
2012-10-28 16:16:25 +00:00
{
char *ceil = item->string;
const char *real_path;
longest_ancestor_length(): require prefix list entries to be normalized Move the responsibility for normalizing prefixes from longest_ancestor_length() to its callers. Use slightly different normalizations at the two callers: In setup_git_directory_gently_1(), use the old normalization, which ignores paths that are not usable. In the next commit we will change this caller to also resolve symlinks in the paths from GIT_CEILING_DIRECTORIES as part of the normalization. In "test-path-utils longest_ancestor_length", use the old normalization, but die() if any paths are unusable. Also change t0060 to only pass normalized paths to the test program (no empty entries or non-absolute paths, strip trailing slashes from the paths, and remove tests that thereby become redundant). The point of this change is to reduce the scope of the ancestor_length tests in t0060 from testing normalization+longest_prefix to testing only mostly longest_prefix. This is necessary because when setup_git_directory_gently_1() starts resolving symlinks as part of its normalization, it will not be reasonable to do the same in the test suite, because that would make the test results depend on the contents of the root directory of the filesystem on which the test is run. HOWEVER: under Windows, bash mangles arguments that look like absolute POSIX paths into DOS paths. So we have to retain the level of normalization done by normalize_path_copy() to convert the bash-mangled DOS paths (which contain backslashes) into paths that use forward slashes. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Jeff King <peff@peff.net>
2012-10-28 16:16:25 +00:00
if (!*ceil || !is_absolute_path(ceil))
longest_ancestor_length(): require prefix list entries to be normalized Move the responsibility for normalizing prefixes from longest_ancestor_length() to its callers. Use slightly different normalizations at the two callers: In setup_git_directory_gently_1(), use the old normalization, which ignores paths that are not usable. In the next commit we will change this caller to also resolve symlinks in the paths from GIT_CEILING_DIRECTORIES as part of the normalization. In "test-path-utils longest_ancestor_length", use the old normalization, but die() if any paths are unusable. Also change t0060 to only pass normalized paths to the test program (no empty entries or non-absolute paths, strip trailing slashes from the paths, and remove tests that thereby become redundant). The point of this change is to reduce the scope of the ancestor_length tests in t0060 from testing normalization+longest_prefix to testing only mostly longest_prefix. This is necessary because when setup_git_directory_gently_1() starts resolving symlinks as part of its normalization, it will not be reasonable to do the same in the test suite, because that would make the test results depend on the contents of the root directory of the filesystem on which the test is run. HOWEVER: under Windows, bash mangles arguments that look like absolute POSIX paths into DOS paths. So we have to retain the level of normalization done by normalize_path_copy() to convert the bash-mangled DOS paths (which contain backslashes) into paths that use forward slashes. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Jeff King <peff@peff.net>
2012-10-28 16:16:25 +00:00
return 0;
real_path = real_path_if_valid(ceil);
if (!real_path)
longest_ancestor_length(): require prefix list entries to be normalized Move the responsibility for normalizing prefixes from longest_ancestor_length() to its callers. Use slightly different normalizations at the two callers: In setup_git_directory_gently_1(), use the old normalization, which ignores paths that are not usable. In the next commit we will change this caller to also resolve symlinks in the paths from GIT_CEILING_DIRECTORIES as part of the normalization. In "test-path-utils longest_ancestor_length", use the old normalization, but die() if any paths are unusable. Also change t0060 to only pass normalized paths to the test program (no empty entries or non-absolute paths, strip trailing slashes from the paths, and remove tests that thereby become redundant). The point of this change is to reduce the scope of the ancestor_length tests in t0060 from testing normalization+longest_prefix to testing only mostly longest_prefix. This is necessary because when setup_git_directory_gently_1() starts resolving symlinks as part of its normalization, it will not be reasonable to do the same in the test suite, because that would make the test results depend on the contents of the root directory of the filesystem on which the test is run. HOWEVER: under Windows, bash mangles arguments that look like absolute POSIX paths into DOS paths. So we have to retain the level of normalization done by normalize_path_copy() to convert the bash-mangled DOS paths (which contain backslashes) into paths that use forward slashes. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Jeff King <peff@peff.net>
2012-10-28 16:16:25 +00:00
return 0;
free(item->string);
item->string = xstrdup(real_path);
longest_ancestor_length(): require prefix list entries to be normalized Move the responsibility for normalizing prefixes from longest_ancestor_length() to its callers. Use slightly different normalizations at the two callers: In setup_git_directory_gently_1(), use the old normalization, which ignores paths that are not usable. In the next commit we will change this caller to also resolve symlinks in the paths from GIT_CEILING_DIRECTORIES as part of the normalization. In "test-path-utils longest_ancestor_length", use the old normalization, but die() if any paths are unusable. Also change t0060 to only pass normalized paths to the test program (no empty entries or non-absolute paths, strip trailing slashes from the paths, and remove tests that thereby become redundant). The point of this change is to reduce the scope of the ancestor_length tests in t0060 from testing normalization+longest_prefix to testing only mostly longest_prefix. This is necessary because when setup_git_directory_gently_1() starts resolving symlinks as part of its normalization, it will not be reasonable to do the same in the test suite, because that would make the test results depend on the contents of the root directory of the filesystem on which the test is run. HOWEVER: under Windows, bash mangles arguments that look like absolute POSIX paths into DOS paths. So we have to retain the level of normalization done by normalize_path_copy() to convert the bash-mangled DOS paths (which contain backslashes) into paths that use forward slashes. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Jeff King <peff@peff.net>
2012-10-28 16:16:25 +00:00
return 1;
}
Clean up work-tree handling The old version of work-tree support was an unholy mess, barely readable, and not to the point. For example, why do you have to provide a worktree, when it is not used? As in "git status". Now it works. Another riddle was: if you can have work trees inside the git dir, why are some programs complaining that they need a work tree? IOW it is allowed to call $ git --git-dir=../ --work-tree=. bla when you really want to. In this case, you are both in the git directory and in the working tree. So, programs have to actually test for the right thing, namely if they are inside a working tree, and not if they are inside a git directory. Also, GIT_DIR=../.git should behave the same as if no GIT_DIR was specified, unless there is a repository in the current working directory. It does now. The logic to determine if a repository is bare, or has a work tree (tertium non datur), is this: --work-tree=bla overrides GIT_WORK_TREE, which overrides core.bare = true, which overrides core.worktree, which overrides GIT_DIR/.. when GIT_DIR ends in /.git, which overrides the directory in which .git/ was found. In related news, a long standing bug was fixed: when in .git/bla/x.git/, which is a bare repository, git formerly assumed ../.. to be the appropriate git dir. This problem was reported by Shawn Pearce to have caused much pain, where a colleague mistakenly ran "git init" in "/" a long time ago, and bare repositories just would not work. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-01 00:30:14 +00:00
/*
* We cannot decide in this function whether we are in the work tree or
* not, since the config can only be read _after_ this function was called.
*/
static const char *setup_git_directory_gently_1(int *nongit_ok)
{
const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
static char cwd[PATH_MAX+1];
const char *gitdirenv, *ret;
char *gitfile;
int len, offset, offset_parent, ceil_offset = -1;
dev_t current_device = 0;
int one_filesystem = 1;
/*
* Let's assume that we are in a git repository.
* If it turns out later that we are somewhere else, the value will be
* updated accordingly.
*/
if (nongit_ok)
*nongit_ok = 0;
if (!getcwd(cwd, sizeof(cwd)-1))
die_errno("Unable to read current working directory");
offset = len = strlen(cwd);
Clean up work-tree handling The old version of work-tree support was an unholy mess, barely readable, and not to the point. For example, why do you have to provide a worktree, when it is not used? As in "git status". Now it works. Another riddle was: if you can have work trees inside the git dir, why are some programs complaining that they need a work tree? IOW it is allowed to call $ git --git-dir=../ --work-tree=. bla when you really want to. In this case, you are both in the git directory and in the working tree. So, programs have to actually test for the right thing, namely if they are inside a working tree, and not if they are inside a git directory. Also, GIT_DIR=../.git should behave the same as if no GIT_DIR was specified, unless there is a repository in the current working directory. It does now. The logic to determine if a repository is bare, or has a work tree (tertium non datur), is this: --work-tree=bla overrides GIT_WORK_TREE, which overrides core.bare = true, which overrides core.worktree, which overrides GIT_DIR/.. when GIT_DIR ends in /.git, which overrides the directory in which .git/ was found. In related news, a long standing bug was fixed: when in .git/bla/x.git/, which is a bare repository, git formerly assumed ../.. to be the appropriate git dir. This problem was reported by Shawn Pearce to have caused much pain, where a colleague mistakenly ran "git init" in "/" a long time ago, and bare repositories just would not work. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-01 00:30:14 +00:00
/*
* If GIT_DIR is set explicitly, we're not going
* to do any discovery, but we still do repository
* validation.
*/
gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
if (gitdirenv)
return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
if (env_ceiling_dirs) {
string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1);
filter_string_list(&ceiling_dirs, 0,
canonicalize_ceiling_entry, NULL);
ceil_offset = longest_ancestor_length(cwd, &ceiling_dirs);
string_list_clear(&ceiling_dirs, 0);
}
if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
ceil_offset = 1;
introduce GIT_WORK_TREE to specify the work tree setup_gdg is used as abbreviation for setup_git_directory_gently. The work tree can be specified using the environment variable GIT_WORK_TREE and the config option core.worktree (the environment variable has precendence over the config option). Additionally there is a command line option --work-tree which sets the environment variable. setup_gdg does the following now: GIT_DIR unspecified repository in .git directory parent directory of the .git directory is used as work tree, GIT_WORK_TREE is ignored GIT_DIR unspecified repository in cwd GIT_DIR is set to cwd see the cases with GIT_DIR specified what happens next and also see the note below GIT_DIR specified GIT_WORK_TREE/core.worktree unspecified cwd is used as work tree GIT_DIR specified GIT_WORK_TREE/core.worktree specified the specified work tree is used Note on the case where GIT_DIR is unspecified and repository is in cwd: GIT_WORK_TREE is used but is_inside_git_dir is always true. I did it this way because setup_gdg might be called multiple times (e.g. when doing alias expansion) and in successive calls setup_gdg should do the same thing every time. Meaning of is_bare/is_inside_work_tree/is_inside_git_dir: (1) is_bare_repository A repository is bare if core.bare is true or core.bare is unspecified and the name suggests it is bare (directory not named .git). The bare option disables a few protective checks which are useful with a working tree. Currently this changes if a repository is bare: updates of HEAD are allowed git gc packs the refs the reflog is disabled by default (2) is_inside_work_tree True if the cwd is inside the associated working tree (if there is one), false otherwise. (3) is_inside_git_dir True if the cwd is inside the git directory, false otherwise. Before this patch is_inside_git_dir was always true for bare repositories. When setup_gdg finds a repository git_config(git_default_config) is always called. This ensure that is_bare_repository makes use of core.bare and does not guess even though core.bare is specified. inside_work_tree and inside_git_dir are set if setup_gdg finds a repository. The is_inside_work_tree and is_inside_git_dir functions will die if they are called before a successful call to setup_gdg. Signed-off-by: Matthias Lederhofer <matled@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-06 07:10:42 +00:00
/*
Clean up work-tree handling The old version of work-tree support was an unholy mess, barely readable, and not to the point. For example, why do you have to provide a worktree, when it is not used? As in "git status". Now it works. Another riddle was: if you can have work trees inside the git dir, why are some programs complaining that they need a work tree? IOW it is allowed to call $ git --git-dir=../ --work-tree=. bla when you really want to. In this case, you are both in the git directory and in the working tree. So, programs have to actually test for the right thing, namely if they are inside a working tree, and not if they are inside a git directory. Also, GIT_DIR=../.git should behave the same as if no GIT_DIR was specified, unless there is a repository in the current working directory. It does now. The logic to determine if a repository is bare, or has a work tree (tertium non datur), is this: --work-tree=bla overrides GIT_WORK_TREE, which overrides core.bare = true, which overrides core.worktree, which overrides GIT_DIR/.. when GIT_DIR ends in /.git, which overrides the directory in which .git/ was found. In related news, a long standing bug was fixed: when in .git/bla/x.git/, which is a bare repository, git formerly assumed ../.. to be the appropriate git dir. This problem was reported by Shawn Pearce to have caused much pain, where a colleague mistakenly ran "git init" in "/" a long time ago, and bare repositories just would not work. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-01 00:30:14 +00:00
* Test in the following order (relative to the cwd):
* - .git (file containing "gitdir: <path>")
Clean up work-tree handling The old version of work-tree support was an unholy mess, barely readable, and not to the point. For example, why do you have to provide a worktree, when it is not used? As in "git status". Now it works. Another riddle was: if you can have work trees inside the git dir, why are some programs complaining that they need a work tree? IOW it is allowed to call $ git --git-dir=../ --work-tree=. bla when you really want to. In this case, you are both in the git directory and in the working tree. So, programs have to actually test for the right thing, namely if they are inside a working tree, and not if they are inside a git directory. Also, GIT_DIR=../.git should behave the same as if no GIT_DIR was specified, unless there is a repository in the current working directory. It does now. The logic to determine if a repository is bare, or has a work tree (tertium non datur), is this: --work-tree=bla overrides GIT_WORK_TREE, which overrides core.bare = true, which overrides core.worktree, which overrides GIT_DIR/.. when GIT_DIR ends in /.git, which overrides the directory in which .git/ was found. In related news, a long standing bug was fixed: when in .git/bla/x.git/, which is a bare repository, git formerly assumed ../.. to be the appropriate git dir. This problem was reported by Shawn Pearce to have caused much pain, where a colleague mistakenly ran "git init" in "/" a long time ago, and bare repositories just would not work. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-01 00:30:14 +00:00
* - .git/
* - ./ (bare)
* - ../.git
Clean up work-tree handling The old version of work-tree support was an unholy mess, barely readable, and not to the point. For example, why do you have to provide a worktree, when it is not used? As in "git status". Now it works. Another riddle was: if you can have work trees inside the git dir, why are some programs complaining that they need a work tree? IOW it is allowed to call $ git --git-dir=../ --work-tree=. bla when you really want to. In this case, you are both in the git directory and in the working tree. So, programs have to actually test for the right thing, namely if they are inside a working tree, and not if they are inside a git directory. Also, GIT_DIR=../.git should behave the same as if no GIT_DIR was specified, unless there is a repository in the current working directory. It does now. The logic to determine if a repository is bare, or has a work tree (tertium non datur), is this: --work-tree=bla overrides GIT_WORK_TREE, which overrides core.bare = true, which overrides core.worktree, which overrides GIT_DIR/.. when GIT_DIR ends in /.git, which overrides the directory in which .git/ was found. In related news, a long standing bug was fixed: when in .git/bla/x.git/, which is a bare repository, git formerly assumed ../.. to be the appropriate git dir. This problem was reported by Shawn Pearce to have caused much pain, where a colleague mistakenly ran "git init" in "/" a long time ago, and bare repositories just would not work. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-01 00:30:14 +00:00
* - ../.git/
* - ../ (bare)
* - ../../.git/
* etc.
introduce GIT_WORK_TREE to specify the work tree setup_gdg is used as abbreviation for setup_git_directory_gently. The work tree can be specified using the environment variable GIT_WORK_TREE and the config option core.worktree (the environment variable has precendence over the config option). Additionally there is a command line option --work-tree which sets the environment variable. setup_gdg does the following now: GIT_DIR unspecified repository in .git directory parent directory of the .git directory is used as work tree, GIT_WORK_TREE is ignored GIT_DIR unspecified repository in cwd GIT_DIR is set to cwd see the cases with GIT_DIR specified what happens next and also see the note below GIT_DIR specified GIT_WORK_TREE/core.worktree unspecified cwd is used as work tree GIT_DIR specified GIT_WORK_TREE/core.worktree specified the specified work tree is used Note on the case where GIT_DIR is unspecified and repository is in cwd: GIT_WORK_TREE is used but is_inside_git_dir is always true. I did it this way because setup_gdg might be called multiple times (e.g. when doing alias expansion) and in successive calls setup_gdg should do the same thing every time. Meaning of is_bare/is_inside_work_tree/is_inside_git_dir: (1) is_bare_repository A repository is bare if core.bare is true or core.bare is unspecified and the name suggests it is bare (directory not named .git). The bare option disables a few protective checks which are useful with a working tree. Currently this changes if a repository is bare: updates of HEAD are allowed git gc packs the refs the reflog is disabled by default (2) is_inside_work_tree True if the cwd is inside the associated working tree (if there is one), false otherwise. (3) is_inside_git_dir True if the cwd is inside the git directory, false otherwise. Before this patch is_inside_git_dir was always true for bare repositories. When setup_gdg finds a repository git_config(git_default_config) is always called. This ensure that is_bare_repository makes use of core.bare and does not guess even though core.bare is specified. inside_work_tree and inside_git_dir are set if setup_gdg finds a repository. The is_inside_work_tree and is_inside_git_dir functions will die if they are called before a successful call to setup_gdg. Signed-off-by: Matthias Lederhofer <matled@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-06 07:10:42 +00:00
*/
one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
if (one_filesystem)
current_device = get_device_or_die(".", NULL, 0);
Clean up work-tree handling The old version of work-tree support was an unholy mess, barely readable, and not to the point. For example, why do you have to provide a worktree, when it is not used? As in "git status". Now it works. Another riddle was: if you can have work trees inside the git dir, why are some programs complaining that they need a work tree? IOW it is allowed to call $ git --git-dir=../ --work-tree=. bla when you really want to. In this case, you are both in the git directory and in the working tree. So, programs have to actually test for the right thing, namely if they are inside a working tree, and not if they are inside a git directory. Also, GIT_DIR=../.git should behave the same as if no GIT_DIR was specified, unless there is a repository in the current working directory. It does now. The logic to determine if a repository is bare, or has a work tree (tertium non datur), is this: --work-tree=bla overrides GIT_WORK_TREE, which overrides core.bare = true, which overrides core.worktree, which overrides GIT_DIR/.. when GIT_DIR ends in /.git, which overrides the directory in which .git/ was found. In related news, a long standing bug was fixed: when in .git/bla/x.git/, which is a bare repository, git formerly assumed ../.. to be the appropriate git dir. This problem was reported by Shawn Pearce to have caused much pain, where a colleague mistakenly ran "git init" in "/" a long time ago, and bare repositories just would not work. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-01 00:30:14 +00:00
for (;;) {
gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
if (gitfile)
gitdirenv = gitfile = xstrdup(gitfile);
else {
if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
}
if (gitdirenv) {
ret = setup_discovered_git_dir(gitdirenv,
cwd, offset, len,
nongit_ok);
free(gitfile);
return ret;
}
free(gitfile);
if (is_git_directory("."))
return setup_bare_git_dir(cwd, offset, len, nongit_ok);
offset_parent = offset;
while (--offset_parent > ceil_offset && cwd[offset_parent] != '/');
if (offset_parent <= ceil_offset)
return setup_nongit(cwd, nongit_ok);
if (one_filesystem) {
dev_t parent_device = get_device_or_die("..", cwd, offset);
if (parent_device != current_device) {
if (nongit_ok) {
if (chdir(cwd))
die_errno("Cannot come back to cwd");
*nongit_ok = 1;
return NULL;
}
cwd[offset] = '\0';
die("Not a git repository (or any parent up to mount point %s)\n"
"Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
}
}
if (chdir("..")) {
cwd[offset] = '\0';
die_errno("Cannot change to '%s/..'", cwd);
}
offset = offset_parent;
introduce GIT_WORK_TREE to specify the work tree setup_gdg is used as abbreviation for setup_git_directory_gently. The work tree can be specified using the environment variable GIT_WORK_TREE and the config option core.worktree (the environment variable has precendence over the config option). Additionally there is a command line option --work-tree which sets the environment variable. setup_gdg does the following now: GIT_DIR unspecified repository in .git directory parent directory of the .git directory is used as work tree, GIT_WORK_TREE is ignored GIT_DIR unspecified repository in cwd GIT_DIR is set to cwd see the cases with GIT_DIR specified what happens next and also see the note below GIT_DIR specified GIT_WORK_TREE/core.worktree unspecified cwd is used as work tree GIT_DIR specified GIT_WORK_TREE/core.worktree specified the specified work tree is used Note on the case where GIT_DIR is unspecified and repository is in cwd: GIT_WORK_TREE is used but is_inside_git_dir is always true. I did it this way because setup_gdg might be called multiple times (e.g. when doing alias expansion) and in successive calls setup_gdg should do the same thing every time. Meaning of is_bare/is_inside_work_tree/is_inside_git_dir: (1) is_bare_repository A repository is bare if core.bare is true or core.bare is unspecified and the name suggests it is bare (directory not named .git). The bare option disables a few protective checks which are useful with a working tree. Currently this changes if a repository is bare: updates of HEAD are allowed git gc packs the refs the reflog is disabled by default (2) is_inside_work_tree True if the cwd is inside the associated working tree (if there is one), false otherwise. (3) is_inside_git_dir True if the cwd is inside the git directory, false otherwise. Before this patch is_inside_git_dir was always true for bare repositories. When setup_gdg finds a repository git_config(git_default_config) is always called. This ensure that is_bare_repository makes use of core.bare and does not guess even though core.bare is specified. inside_work_tree and inside_git_dir are set if setup_gdg finds a repository. The is_inside_work_tree and is_inside_git_dir functions will die if they are called before a successful call to setup_gdg. Signed-off-by: Matthias Lederhofer <matled@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-06 07:10:42 +00:00
}
}
const char *setup_git_directory_gently(int *nongit_ok)
{
const char *prefix;
prefix = setup_git_directory_gently_1(nongit_ok);
if (prefix)
setenv("GIT_PREFIX", prefix, 1);
else
setenv("GIT_PREFIX", "", 1);
if (startup_info) {
startup_info->have_repository = !nongit_ok || !*nongit_ok;
startup_info->prefix = prefix;
}
return prefix;
}
int git_config_perm(const char *var, const char *value)
{
int i;
char *endptr;
if (value == NULL)
return PERM_GROUP;
if (!strcmp(value, "umask"))
return PERM_UMASK;
if (!strcmp(value, "group"))
return PERM_GROUP;
if (!strcmp(value, "all") ||
!strcmp(value, "world") ||
!strcmp(value, "everybody"))
return PERM_EVERYBODY;
/* Parse octal numbers */
i = strtol(value, &endptr, 8);
/* If not an octal number, maybe true/false? */
if (*endptr != 0)
return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK;
/*
* Treat values 0, 1 and 2 as compatibility cases, otherwise it is
* a chmod value to restrict to.
*/
switch (i) {
case PERM_UMASK: /* 0 */
return PERM_UMASK;
case OLD_PERM_GROUP: /* 1 */
return PERM_GROUP;
case OLD_PERM_EVERYBODY: /* 2 */
return PERM_EVERYBODY;
}
/* A filemode value was given: 0xxx */
if ((i & 0600) != 0600)
die("Problem with core.sharedRepository filemode value "
"(0%.3o).\nThe owner of files must always have "
"read and write permissions.", i);
/*
* Mask filemode value. Others can not get write permission.
* x flags for directories are handled separately.
*/
return -(i & 0666);
}
int check_repository_format_version(const char *var, const char *value, void *cb)
{
if (strcmp(var, "core.repositoryformatversion") == 0)
repository_format_version = git_config_int(var, value);
else if (strcmp(var, "core.sharedrepository") == 0)
shared_repository = git_config_perm(var, value);
Clean up work-tree handling The old version of work-tree support was an unholy mess, barely readable, and not to the point. For example, why do you have to provide a worktree, when it is not used? As in "git status". Now it works. Another riddle was: if you can have work trees inside the git dir, why are some programs complaining that they need a work tree? IOW it is allowed to call $ git --git-dir=../ --work-tree=. bla when you really want to. In this case, you are both in the git directory and in the working tree. So, programs have to actually test for the right thing, namely if they are inside a working tree, and not if they are inside a git directory. Also, GIT_DIR=../.git should behave the same as if no GIT_DIR was specified, unless there is a repository in the current working directory. It does now. The logic to determine if a repository is bare, or has a work tree (tertium non datur), is this: --work-tree=bla overrides GIT_WORK_TREE, which overrides core.bare = true, which overrides core.worktree, which overrides GIT_DIR/.. when GIT_DIR ends in /.git, which overrides the directory in which .git/ was found. In related news, a long standing bug was fixed: when in .git/bla/x.git/, which is a bare repository, git formerly assumed ../.. to be the appropriate git dir. This problem was reported by Shawn Pearce to have caused much pain, where a colleague mistakenly ran "git init" in "/" a long time ago, and bare repositories just would not work. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-01 00:30:14 +00:00
else if (strcmp(var, "core.bare") == 0) {
is_bare_repository_cfg = git_config_bool(var, value);
if (is_bare_repository_cfg == 1)
inside_work_tree = -1;
} else if (strcmp(var, "core.worktree") == 0) {
if (!value)
return config_error_nonbool(var);
Avoid unnecessary "if-before-free" tests. This change removes all obvious useless if-before-free tests. E.g., it replaces code like this: if (some_expression) free (some_expression); with the now-equivalent: free (some_expression); It is equivalent not just because POSIX has required free(NULL) to work for a long time, but simply because it has worked for so long that no reasonable porting target fails the test. Here's some evidence from nearly 1.5 years ago: http://www.winehq.org/pipermail/wine-patches/2006-October/031544.html FYI, the change below was prepared by running the following: git ls-files -z | xargs -0 \ perl -0x3b -pi -e \ 's/\bif\s*\(\s*(\S+?)(?:\s*!=\s*NULL)?\s*\)\s+(free\s*\(\s*\1\s*\))/$2/s' Note however, that it doesn't handle brace-enclosed blocks like "if (x) { free (x); }". But that's ok, since there were none like that in git sources. Beware: if you do use the above snippet, note that it can produce syntactically invalid C code. That happens when the affected "if"-statement has a matching "else". E.g., it would transform this if (x) free (x); else foo (); into this: free (x); else foo (); There were none of those here, either. If you're interested in automating detection of the useless tests, you might like the useless-if-before-free script in gnulib: [it *does* detect brace-enclosed free statements, and has a --name=S option to make it detect free-like functions with different names] http://git.sv.gnu.org/gitweb/?p=gnulib.git;a=blob;f=build-aux/useless-if-before-free Addendum: Remove one more (in imap-send.c), spotted by Jean-Luc Herren <jlh@gmx.ch>. Signed-off-by: Jim Meyering <meyering@redhat.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-31 17:26:32 +00:00
free(git_work_tree_cfg);
Clean up work-tree handling The old version of work-tree support was an unholy mess, barely readable, and not to the point. For example, why do you have to provide a worktree, when it is not used? As in "git status". Now it works. Another riddle was: if you can have work trees inside the git dir, why are some programs complaining that they need a work tree? IOW it is allowed to call $ git --git-dir=../ --work-tree=. bla when you really want to. In this case, you are both in the git directory and in the working tree. So, programs have to actually test for the right thing, namely if they are inside a working tree, and not if they are inside a git directory. Also, GIT_DIR=../.git should behave the same as if no GIT_DIR was specified, unless there is a repository in the current working directory. It does now. The logic to determine if a repository is bare, or has a work tree (tertium non datur), is this: --work-tree=bla overrides GIT_WORK_TREE, which overrides core.bare = true, which overrides core.worktree, which overrides GIT_DIR/.. when GIT_DIR ends in /.git, which overrides the directory in which .git/ was found. In related news, a long standing bug was fixed: when in .git/bla/x.git/, which is a bare repository, git formerly assumed ../.. to be the appropriate git dir. This problem was reported by Shawn Pearce to have caused much pain, where a colleague mistakenly ran "git init" in "/" a long time ago, and bare repositories just would not work. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-08-01 00:30:14 +00:00
git_work_tree_cfg = xstrdup(value);
inside_work_tree = -1;
}
return 0;
}
int check_repository_format(void)
{
return check_repository_format_gently(get_git_dir(), NULL);
}
/*
* Returns the "prefix", a path to the current working directory
* relative to the work tree root, or NULL, if the current working
* directory is not a strict subdirectory of the work tree root. The
* prefix always ends with a '/' character.
*/
const char *setup_git_directory(void)
{
return setup_git_directory_gently(NULL);
}
const char *resolve_gitdir(const char *suspect)
{
if (is_git_directory(suspect))
return suspect;
return read_gitfile(suspect);
}