git/builtin/rev-parse.c

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/*
* rev-parse.c
*
* Copyright (C) Linus Torvalds, 2005
*/
#define USE_THE_INDEX_VARIABLE
#include "builtin.h"
#include "abspath.h"
#include "config.h"
#include "commit.h"
#include "environment.h"
#include "gettext.h"
#include "hash.h"
#include "hex.h"
#include "refs.h"
#include "quote.h"
#include "object-name.h"
#include "parse-options.h"
#include "path.h"
#include "diff.h"
#include "read-cache-ll.h"
#include "revision.h"
#include "setup.h"
#include "split-index.h"
#include "submodule.h"
#include "commit-reach.h"
#include "shallow.h"
#define DO_REVS 1
#define DO_NOREV 2
#define DO_FLAGS 4
#define DO_NONFLAGS 8
static int filter = ~0;
static const char *def;
#define NORMAL 0
#define REVERSED 1
static int show_type = NORMAL;
#define SHOW_SYMBOLIC_ASIS 1
#define SHOW_SYMBOLIC_FULL 2
static int symbolic;
static int abbrev;
static int abbrev_ref;
static int abbrev_ref_strict;
static int output_sq;
static int stuck_long;
static struct ref_exclusions ref_excludes = REF_EXCLUSIONS_INIT;
/*
* Some arguments are relevant "revision" arguments,
* others are about output format or other details.
* This sorts it all out.
*/
static int is_rev_argument(const char *arg)
{
static const char *rev_args[] = {
"--all",
"--bisect",
"--dense",
"--branches=",
"--branches",
"--header",
"--ignore-missing",
"--max-age=",
"--max-count=",
"--min-age=",
"--no-merges",
"--min-parents=",
"--no-min-parents",
"--max-parents=",
"--no-max-parents",
"--objects",
"--objects-edge",
"--parents",
"--pretty",
"--remotes=",
"--remotes",
"--glob=",
"--sparse",
"--tags=",
"--tags",
"--topo-order",
"--date-order",
"--unpacked",
NULL
};
const char **p = rev_args;
/* accept -<digit>, like traditional "head" */
if ((*arg == '-') && isdigit(arg[1]))
return 1;
for (;;) {
const char *str = *p++;
int len;
if (!str)
return 0;
len = strlen(str);
if (!strcmp(arg, str) ||
(str[len-1] == '=' && !strncmp(arg, str, len)))
return 1;
}
}
/* Output argument as a string, either SQ or normal */
static void show(const char *arg)
{
if (output_sq) {
int sq = '\'', ch;
putchar(sq);
while ((ch = *arg++)) {
if (ch == sq)
fputs("'\\'", stdout);
putchar(ch);
}
putchar(sq);
putchar(' ');
}
else
puts(arg);
}
/* Like show(), but with a negation prefix according to type */
static void show_with_type(int type, const char *arg)
{
if (type != show_type)
putchar('^');
show(arg);
}
/* Output a revision, only if filter allows it */
static void show_rev(int type, const struct object_id *oid, const char *name)
{
if (!(filter & DO_REVS))
return;
def = NULL;
if ((symbolic || abbrev_ref) && name) {
if (symbolic == SHOW_SYMBOLIC_FULL || abbrev_ref) {
struct object_id discard;
char *full;
switch (repo_dwim_ref(the_repository, name,
strlen(name), &discard, &full,
0)) {
case 0:
/*
* Not found -- not a ref. We could
* emit "name" here, but symbolic-full
* users are interested in finding the
* refs spelled in full, and they would
* need to filter non-refs if we did so.
*/
break;
case 1: /* happy */
if (abbrev_ref) {
char *old = full;
full = shorten_unambiguous_ref(full,
abbrev_ref_strict);
free(old);
}
show_with_type(type, full);
break;
default: /* ambiguous */
error("refname '%s' is ambiguous", name);
break;
}
free(full);
} else {
show_with_type(type, name);
}
}
else if (abbrev)
show_with_type(type,
repo_find_unique_abbrev(the_repository, oid, abbrev));
else
show_with_type(type, oid_to_hex(oid));
}
/* Output a flag, only if filter allows it. */
static int show_flag(const char *arg)
{
if (!(filter & DO_FLAGS))
return 0;
if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) {
show(arg);
return 1;
}
return 0;
}
static int show_default(void)
{
const char *s = def;
if (s) {
struct object_id oid;
def = NULL;
if (!repo_get_oid(the_repository, s, &oid)) {
show_rev(NORMAL, &oid, s);
return 1;
}
}
return 0;
}
static int show_reference(const char *refname, const struct object_id *oid,
int flag UNUSED, void *cb_data UNUSED)
{
if (ref_excluded(&ref_excludes, refname))
return 0;
show_rev(NORMAL, oid, refname);
return 0;
}
static int anti_reference(const char *refname, const struct object_id *oid,
int flag UNUSED, void *cb_data UNUSED)
{
show_rev(REVERSED, oid, refname);
return 0;
}
static int show_abbrev(const struct object_id *oid, void *cb_data UNUSED)
{
show_rev(NORMAL, oid, NULL);
return 0;
}
static void show_datestring(const char *flag, const char *datestr)
{
char *buffer;
/* date handling requires both flags and revs */
if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
return;
buffer = xstrfmt("%s%"PRItime, flag, approxidate(datestr));
show(buffer);
free(buffer);
}
static int show_file(const char *arg, int output_prefix)
{
show_default();
if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) {
if (output_prefix) {
const char *prefix = startup_info->prefix;
char *fname = prefix_filename(prefix, arg);
show(fname);
free(fname);
} else
show(arg);
return 1;
}
return 0;
}
static int try_difference(const char *arg)
{
char *dotdot;
struct object_id start_oid;
struct object_id end_oid;
const char *end;
const char *start;
int symmetric;
static const char head_by_default[] = "HEAD";
if (!(dotdot = strstr(arg, "..")))
return 0;
end = dotdot + 2;
start = arg;
symmetric = (*end == '.');
*dotdot = 0;
end += symmetric;
if (!*end)
end = head_by_default;
if (dotdot == arg)
start = head_by_default;
if (start == head_by_default && end == head_by_default &&
!symmetric) {
/*
* Just ".."? That is not a range but the
* pathspec for the parent directory.
*/
*dotdot = '.';
return 0;
}
if (!repo_get_oid_committish(the_repository, start, &start_oid) && !repo_get_oid_committish(the_repository, end, &end_oid)) {
show_rev(NORMAL, &end_oid, end);
show_rev(symmetric ? NORMAL : REVERSED, &start_oid, start);
if (symmetric) {
struct commit_list *exclude;
struct commit *a, *b;
a = lookup_commit_reference(the_repository, &start_oid);
b = lookup_commit_reference(the_repository, &end_oid);
if (!a || !b) {
*dotdot = '.';
return 0;
}
exclude = repo_get_merge_bases(the_repository, a, b);
while (exclude) {
struct commit *commit = pop_commit(&exclude);
show_rev(REVERSED, &commit->object.oid, NULL);
}
}
*dotdot = '.';
return 1;
}
*dotdot = '.';
return 0;
}
static int try_parent_shorthands(const char *arg)
{
char *dotdot;
struct object_id oid;
struct commit *commit;
struct commit_list *parents;
int parent_number;
int include_rev = 0;
int include_parents = 0;
int exclude_parent = 0;
if ((dotdot = strstr(arg, "^!"))) {
include_rev = 1;
if (dotdot[2])
return 0;
} else if ((dotdot = strstr(arg, "^@"))) {
include_parents = 1;
if (dotdot[2])
return 0;
} else if ((dotdot = strstr(arg, "^-"))) {
include_rev = 1;
exclude_parent = 1;
if (dotdot[2]) {
char *end;
exclude_parent = strtoul(dotdot + 2, &end, 10);
if (*end != '\0' || !exclude_parent)
return 0;
}
} else
return 0;
*dotdot = 0;
if (repo_get_oid_committish(the_repository, arg, &oid) ||
!(commit = lookup_commit_reference(the_repository, &oid))) {
*dotdot = '^';
return 0;
}
if (exclude_parent &&
exclude_parent > commit_list_count(commit->parents)) {
*dotdot = '^';
return 0;
}
if (include_rev)
show_rev(NORMAL, &oid, arg);
for (parents = commit->parents, parent_number = 1;
parents;
parents = parents->next, parent_number++) {
char *name = NULL;
if (exclude_parent && parent_number != exclude_parent)
continue;
if (symbolic)
name = xstrfmt("%s^%d", arg, parent_number);
show_rev(include_parents ? NORMAL : REVERSED,
&parents->item->object.oid, name);
free(name);
}
*dotdot = '^';
return 1;
}
static int parseopt_dump(const struct option *o, const char *arg, int unset)
{
struct strbuf *parsed = o->value;
if (unset)
strbuf_addf(parsed, " --no-%s", o->long_name);
else if (o->short_name && (o->long_name == NULL || !stuck_long))
strbuf_addf(parsed, " -%c", o->short_name);
else
strbuf_addf(parsed, " --%s", o->long_name);
if (arg) {
if (!stuck_long)
strbuf_addch(parsed, ' ');
else if (o->long_name)
strbuf_addch(parsed, '=');
sq_quote_buf(parsed, arg);
}
return 0;
}
static const char *skipspaces(const char *s)
{
while (isspace(*s))
s++;
return s;
}
static char *findspace(const char *s)
{
for (; *s; s++)
if (isspace(*s))
return (char*)s;
return NULL;
}
static int cmd_parseopt(int argc, const char **argv, const char *prefix)
{
static int keep_dashdash = 0, stop_at_non_option = 0;
static char const * const parseopt_usage[] = {
N_("git rev-parse --parseopt [<options>] -- [<args>...]"),
NULL
};
static struct option parseopt_opts[] = {
OPT_BOOL(0, "keep-dashdash", &keep_dashdash,
N_("keep the `--` passed as an arg")),
OPT_BOOL(0, "stop-at-non-option", &stop_at_non_option,
N_("stop parsing after the "
"first non-option argument")),
OPT_BOOL(0, "stuck-long", &stuck_long,
N_("output in stuck long form")),
OPT_END(),
};
static const char * const flag_chars = "*=?!";
struct strbuf sb = STRBUF_INIT, parsed = STRBUF_INIT;
const char **usage = NULL;
struct option *opts = NULL;
int onb = 0, osz = 0, unb = 0, usz = 0;
strbuf_addstr(&parsed, "set --");
argc = parse_options(argc, argv, prefix, parseopt_opts, parseopt_usage,
PARSE_OPT_KEEP_DASHDASH);
if (argc < 1 || strcmp(argv[0], "--"))
usage_with_options(parseopt_usage, parseopt_opts);
/* get the usage up to the first line with a -- on it */
for (;;) {
if (strbuf_getline(&sb, stdin) == EOF)
die(_("premature end of input"));
ALLOC_GROW(usage, unb + 1, usz);
if (!strcmp("--", sb.buf)) {
if (unb < 1)
die(_("no usage string given before the `--' separator"));
usage[unb] = NULL;
break;
}
usage[unb++] = strbuf_detach(&sb, NULL);
}
/* parse: (<short>|<short>,<long>|<long>)[*=?!]*<arghint>? SP+ <help> */
while (strbuf_getline(&sb, stdin) != EOF) {
const char *s;
char *help;
struct option *o;
if (!sb.len)
continue;
ALLOC_GROW(opts, onb + 1, osz);
memset(opts + onb, 0, sizeof(opts[onb]));
o = &opts[onb++];
help = findspace(sb.buf);
if (!help || sb.buf == help) {
o->type = OPTION_GROUP;
o->help = xstrdup(skipspaces(sb.buf));
continue;
}
*help = '\0';
o->type = OPTION_CALLBACK;
o->help = xstrdup(skipspaces(help+1));
o->value = &parsed;
o->flags = PARSE_OPT_NOARG;
o->callback = &parseopt_dump;
/* name(s) */
s = strpbrk(sb.buf, flag_chars);
if (!s)
s = help;
if (s == sb.buf)
die(_("missing opt-spec before option flags"));
if (s - sb.buf == 1) /* short option only */
o->short_name = *sb.buf;
else if (sb.buf[1] != ',') /* long option only */
o->long_name = xmemdupz(sb.buf, s - sb.buf);
else {
o->short_name = *sb.buf;
o->long_name = xmemdupz(sb.buf + 2, s - sb.buf - 2);
}
/* flags */
while (s < help) {
switch (*s++) {
case '=':
o->flags &= ~PARSE_OPT_NOARG;
continue;
case '?':
o->flags &= ~PARSE_OPT_NOARG;
o->flags |= PARSE_OPT_OPTARG;
continue;
case '!':
o->flags |= PARSE_OPT_NONEG;
continue;
case '*':
o->flags |= PARSE_OPT_HIDDEN;
continue;
}
s--;
break;
}
if (s < help)
o->argh = xmemdupz(s, help - s);
}
strbuf_release(&sb);
/* put an OPT_END() */
ALLOC_GROW(opts, onb + 1, osz);
memset(opts + onb, 0, sizeof(opts[onb]));
argc = parse_options(argc, argv, prefix, opts, usage,
(keep_dashdash ? PARSE_OPT_KEEP_DASHDASH : 0) |
(stop_at_non_option ? PARSE_OPT_STOP_AT_NON_OPTION : 0) |
PARSE_OPT_SHELL_EVAL);
strbuf_addstr(&parsed, " --");
sq_quote_argv(&parsed, argv);
puts(parsed.buf);
built-ins & libs & helpers: add/move destructors, fix leaks Fix various leaks in built-ins, libraries and a test helper here we were missing a call to strbuf_release(), string_list_clear() etc, or were calling them after a potential "return". Comments on individual changes: - builtin/checkout.c: Fix a memory leak that was introduced in [1]. A sibling leak introduced in [2] was recently fixed in [3]. As with [3] we should be using the wt_status_state_free_buffers() API introduced in [4]. - builtin/repack.c: Fix a leak that's been here since this use of "strbuf_release()" was added in a1bbc6c0176 (repack: rewrite the shell script in C, 2013-09-15). We don't use the variable for anything except this loop, so we can instead free it right afterwards. - builtin/rev-parse: Fix a leak that's been here since this code was added in 21d47835386 (Add a parseopt mode to git-rev-parse to bring parse-options to shell scripts., 2007-11-04). - builtin/stash.c: Fix a couple of leaks that have been here since this code was added in d4788af875c (stash: convert create to builtin, 2019-02-25), we strbuf_release()'d only some of the "struct strbuf" we allocated earlier in the function, let's release all of them. - ref-filter.c: Fix a leak in 482c1191869 (gpg-interface: improve interface for parsing tags, 2021-02-11), we don't use the "payload" variable that we ask parse_signature() to populate for us, so let's free it. - t/helper/test-fake-ssh.c: Fix a leak that's been here since this code was added in 3064d5a38c7 (mingw: fix t5601-clone.sh, 2016-01-27). Let's free the "struct strbuf" as soon as we don't need it anymore. 1. c45f0f525de (switch: reject if some operation is in progress, 2019-03-29) 2. 2708ce62d21 (branch: sort detached HEAD based on a flag, 2021-01-07) 3. abcac2e19fa (ref-filter.c: fix a leak in get_head_description, 2022-09-25) 4. 962dd7ebc3e (wt-status: introduce wt_status_state_free_buffers(), 2020-09-27). Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Taylor Blau <me@ttaylorr.com>
2022-11-08 18:17:42 +00:00
strbuf_release(&parsed);
return 0;
}
static int cmd_sq_quote(int argc, const char **argv)
{
struct strbuf buf = STRBUF_INIT;
if (argc)
sq_quote_argv(&buf, argv);
printf("%s\n", buf.buf);
strbuf_release(&buf);
return 0;
}
static void die_no_single_rev(int quiet)
{
if (quiet)
exit(1);
else
die(_("Needed a single revision"));
}
static const char builtin_rev_parse_usage[] =
N_("git rev-parse --parseopt [<options>] -- [<args>...]\n"
" or: git rev-parse --sq-quote [<arg>...]\n"
" or: git rev-parse [<options>] [<arg>...]\n"
"\n"
"Run \"git rev-parse --parseopt -h\" for more information on the first usage.");
/*
* Parse "opt" or "opt=<value>", setting value respectively to either
* NULL or the string after "=".
*/
static int opt_with_value(const char *arg, const char *opt, const char **value)
{
if (skip_prefix(arg, opt, &arg)) {
if (!*arg) {
*value = NULL;
return 1;
}
if (*arg++ == '=') {
*value = arg;
return 1;
}
}
return 0;
}
static void handle_ref_opt(const char *pattern, const char *prefix)
{
if (pattern)
for_each_glob_ref_in(show_reference, pattern, prefix, NULL);
else
for_each_ref_in(prefix, show_reference, NULL);
clear_ref_exclusions(&ref_excludes);
}
enum format_type {
/* We would like a relative path. */
FORMAT_RELATIVE,
/* We would like a canonical absolute path. */
FORMAT_CANONICAL,
/* We would like the default behavior. */
FORMAT_DEFAULT,
};
enum default_type {
/* Our default is a relative path. */
DEFAULT_RELATIVE,
/* Our default is a relative path if there's a shared root. */
DEFAULT_RELATIVE_IF_SHARED,
/* Our default is a canonical absolute path. */
DEFAULT_CANONICAL,
/* Our default is not to modify the item. */
DEFAULT_UNMODIFIED,
};
static void print_path(const char *path, const char *prefix, enum format_type format, enum default_type def)
{
char *cwd = NULL;
/*
* We don't ever produce a relative path if prefix is NULL, so set the
* prefix to the current directory so that we can produce a relative
* path whenever possible. If we're using RELATIVE_IF_SHARED mode, then
* we want an absolute path unless the two share a common prefix, so don't
* set it in that case, since doing so causes a relative path to always
* be produced if possible.
*/
if (!prefix && (format != FORMAT_DEFAULT || def != DEFAULT_RELATIVE_IF_SHARED))
prefix = cwd = xgetcwd();
if (format == FORMAT_DEFAULT && def == DEFAULT_UNMODIFIED) {
puts(path);
} else if (format == FORMAT_RELATIVE ||
(format == FORMAT_DEFAULT && def == DEFAULT_RELATIVE)) {
/*
* In order for relative_path to work as expected, we need to
* make sure that both paths are absolute paths. If we don't,
* we can end up with an unexpected absolute path that the user
* didn't want.
*/
struct strbuf buf = STRBUF_INIT, realbuf = STRBUF_INIT, prefixbuf = STRBUF_INIT;
if (!is_absolute_path(path)) {
strbuf_realpath_forgiving(&realbuf, path, 1);
path = realbuf.buf;
}
if (!is_absolute_path(prefix)) {
strbuf_realpath_forgiving(&prefixbuf, prefix, 1);
prefix = prefixbuf.buf;
}
puts(relative_path(path, prefix, &buf));
strbuf_release(&buf);
strbuf_release(&realbuf);
strbuf_release(&prefixbuf);
} else if (format == FORMAT_DEFAULT && def == DEFAULT_RELATIVE_IF_SHARED) {
struct strbuf buf = STRBUF_INIT;
puts(relative_path(path, prefix, &buf));
strbuf_release(&buf);
} else {
struct strbuf buf = STRBUF_INIT;
strbuf_realpath_forgiving(&buf, path, 1);
puts(buf.buf);
strbuf_release(&buf);
}
free(cwd);
}
int cmd_rev_parse(int argc, const char **argv, const char *prefix)
{
int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
int did_repo_setup = 0;
int has_dashdash = 0;
int output_prefix = 0;
struct object_id oid;
unsigned int flags = 0;
const char *name = NULL;
struct object_context unused;
rev-parse: fix several options when running in a subdirectory In addition to making git_path() aware of certain file names that need to be handled differently e.g. when running in worktrees, the commit 557bd833bb (git_path(): be aware of file relocation in $GIT_DIR, 2014-11-30) also snuck in a new option for `git rev-parse`: `--git-path`. On the face of it, there is no obvious bug in that commit's diff: it faithfully calls git_path() on the argument and prints it out, i.e. `git rev-parse --git-path <filename>` has the same precise behavior as calling `git_path("<filename>")` in C. The problem lies deeper, much deeper. In hindsight (which is always unfair), implementing the .git/ directory discovery in `setup_git_directory()` by changing the working directory may have allowed us to avoid passing around a struct that contains information about the current repository, but it bought us many, many problems. In this case, when being called in a subdirectory, `git rev-parse` changes the working directory to the top-level directory before calling `git_path()`. In the new working directory, the result is correct. But in the working directory of the calling script, it is incorrect. Example: when calling `git rev-parse --git-path HEAD` in, say, the Documentation/ subdirectory of Git's own source code, the string `.git/HEAD` is printed. Side note: that bug is hidden when running in a subdirectory of a worktree that was added by the `git worktree` command: in that case, the (correct) absolute path of the `HEAD` file is printed. In the interest of time, this patch does not go the "correct" route to introduce a struct with repository information (and removing global state in the process), instead this patch chooses to detect when the command was called in a subdirectory and forces the result to be an absolute path. While at it, we are also fixing the output of --git-common-dir and --shared-index-path. Lastly, please note that we reuse the same strbuf for all of the relative_path() calls; this avoids frequent allocation (and duplicated code), and it does not risk memory leaks, for two reasons: 1) the cmd_rev_parse() function does not return anywhere between the use of the new strbuf instance and its final release, and 2) git-rev-parse is one of these "one-shot" programs in Git, i.e. it exits after running for a very short time, meaning that all allocated memory is released with the exit() call anyway. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-17 16:59:06 +00:00
struct strbuf buf = STRBUF_INIT;
const int hexsz = the_hash_algo->hexsz;
rev-parse: handle --end-of-options We taught rev-list a new way to separate options from revisions in 19e8789b23 (revision: allow --end-of-options to end option parsing, 2019-08-06), but rev-parse uses its own parser. It should know about --end-of-options not only for consistency, but because it may be presented with similarly ambiguous cases. E.g., if a caller does: git rev-parse "$rev" -- "$path" to parse an untrusted input, then it will get confused if $rev contains an option-like string like "--local-env-vars". Or even "--not-real", which we'd keep as an option to pass along to rev-list. Or even more importantly: git rev-parse --verify "$rev" can be confused by options, even though its purpose is safely parsing untrusted input. On the plus side, it will always fail the --verify part, as it will not have parsed a revision, so the caller will generally "fail closed" rather than continue to use the untrusted string. But it will still trigger whatever option was in "$rev"; this should be mostly harmless, since rev-parse options are all read-only, but I didn't carefully audit all paths. This patch lets callers write: git rev-parse --end-of-options "$rev" -- "$path" and: git rev-parse --verify --end-of-options "$rev" which will both treat "$rev" always as a revision parameter. The latter is a bit clunky. It would be nicer if we had defined "--verify" to require that its next argument be the revision. But we have not historically done so, and: git rev-parse --verify -q "$rev" does currently work. I added a test here to confirm that we didn't break that. A few implementation notes: - We don't document --end-of-options explicitly in commands, but rather in gitcli(7). So I didn't give it its own section in git-rev-parse(1). But I did call it out specifically in the --verify section, and include it in the examples, which should show best practices. - We don't have to re-indent the main option-parsing block, because we can combine our "did we see end of options" check with "does it start with a dash". The exception is the pre-setup options, which need their own block. - We do however have to pull the "--" parsing out of the "does it start with dash" block, because we want to parse it even if we've seen --end-of-options. - We'll leave "--end-of-options" in the output. This is probably not technically necessary, as a careful caller will do: git rev-parse --end-of-options $revs -- $paths and anything in $revs will be resolved to an object id. However, it does help a slightly less careful caller like: git rev-parse --end-of-options $revs_or_paths where a path "--foo" will remain in the output as long as it also exists on disk. In that case, it's helpful to retain --end-of-options to get passed along to rev-list, s it would otherwise see just "--foo". Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-10 21:40:19 +00:00
int seen_end_of_options = 0;
enum format_type format = FORMAT_DEFAULT;
if (argc > 1 && !strcmp("--parseopt", argv[1]))
return cmd_parseopt(argc - 1, argv + 1, prefix);
if (argc > 1 && !strcmp("--sq-quote", argv[1]))
return cmd_sq_quote(argc - 2, argv + 2);
if (argc > 1 && !strcmp("-h", argv[1]))
usage(builtin_rev_parse_usage);
for (i = 1; i < argc; i++) {
if (!strcmp(argv[i], "--")) {
has_dashdash = 1;
break;
}
}
/* No options; just report on whether we're in a git repo or not. */
if (argc == 1) {
setup_git_directory();
git_config(git_default_config, NULL);
return 0;
}
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (as_is) {
if (show_file(arg, output_prefix) && as_is < 2)
verify_filename(prefix, arg, 0);
continue;
}
rev-parse: handle --end-of-options We taught rev-list a new way to separate options from revisions in 19e8789b23 (revision: allow --end-of-options to end option parsing, 2019-08-06), but rev-parse uses its own parser. It should know about --end-of-options not only for consistency, but because it may be presented with similarly ambiguous cases. E.g., if a caller does: git rev-parse "$rev" -- "$path" to parse an untrusted input, then it will get confused if $rev contains an option-like string like "--local-env-vars". Or even "--not-real", which we'd keep as an option to pass along to rev-list. Or even more importantly: git rev-parse --verify "$rev" can be confused by options, even though its purpose is safely parsing untrusted input. On the plus side, it will always fail the --verify part, as it will not have parsed a revision, so the caller will generally "fail closed" rather than continue to use the untrusted string. But it will still trigger whatever option was in "$rev"; this should be mostly harmless, since rev-parse options are all read-only, but I didn't carefully audit all paths. This patch lets callers write: git rev-parse --end-of-options "$rev" -- "$path" and: git rev-parse --verify --end-of-options "$rev" which will both treat "$rev" always as a revision parameter. The latter is a bit clunky. It would be nicer if we had defined "--verify" to require that its next argument be the revision. But we have not historically done so, and: git rev-parse --verify -q "$rev" does currently work. I added a test here to confirm that we didn't break that. A few implementation notes: - We don't document --end-of-options explicitly in commands, but rather in gitcli(7). So I didn't give it its own section in git-rev-parse(1). But I did call it out specifically in the --verify section, and include it in the examples, which should show best practices. - We don't have to re-indent the main option-parsing block, because we can combine our "did we see end of options" check with "does it start with a dash". The exception is the pre-setup options, which need their own block. - We do however have to pull the "--" parsing out of the "does it start with dash" block, because we want to parse it even if we've seen --end-of-options. - We'll leave "--end-of-options" in the output. This is probably not technically necessary, as a careful caller will do: git rev-parse --end-of-options $revs -- $paths and anything in $revs will be resolved to an object id. However, it does help a slightly less careful caller like: git rev-parse --end-of-options $revs_or_paths where a path "--foo" will remain in the output as long as it also exists on disk. In that case, it's helpful to retain --end-of-options to get passed along to rev-list, s it would otherwise see just "--foo". Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-10 21:40:19 +00:00
if (!seen_end_of_options) {
if (!strcmp(arg, "--local-env-vars")) {
int i;
for (i = 0; local_repo_env[i]; i++)
printf("%s\n", local_repo_env[i]);
continue;
}
if (!strcmp(arg, "--resolve-git-dir")) {
const char *gitdir = argv[++i];
if (!gitdir)
die(_("--resolve-git-dir requires an argument"));
rev-parse: handle --end-of-options We taught rev-list a new way to separate options from revisions in 19e8789b23 (revision: allow --end-of-options to end option parsing, 2019-08-06), but rev-parse uses its own parser. It should know about --end-of-options not only for consistency, but because it may be presented with similarly ambiguous cases. E.g., if a caller does: git rev-parse "$rev" -- "$path" to parse an untrusted input, then it will get confused if $rev contains an option-like string like "--local-env-vars". Or even "--not-real", which we'd keep as an option to pass along to rev-list. Or even more importantly: git rev-parse --verify "$rev" can be confused by options, even though its purpose is safely parsing untrusted input. On the plus side, it will always fail the --verify part, as it will not have parsed a revision, so the caller will generally "fail closed" rather than continue to use the untrusted string. But it will still trigger whatever option was in "$rev"; this should be mostly harmless, since rev-parse options are all read-only, but I didn't carefully audit all paths. This patch lets callers write: git rev-parse --end-of-options "$rev" -- "$path" and: git rev-parse --verify --end-of-options "$rev" which will both treat "$rev" always as a revision parameter. The latter is a bit clunky. It would be nicer if we had defined "--verify" to require that its next argument be the revision. But we have not historically done so, and: git rev-parse --verify -q "$rev" does currently work. I added a test here to confirm that we didn't break that. A few implementation notes: - We don't document --end-of-options explicitly in commands, but rather in gitcli(7). So I didn't give it its own section in git-rev-parse(1). But I did call it out specifically in the --verify section, and include it in the examples, which should show best practices. - We don't have to re-indent the main option-parsing block, because we can combine our "did we see end of options" check with "does it start with a dash". The exception is the pre-setup options, which need their own block. - We do however have to pull the "--" parsing out of the "does it start with dash" block, because we want to parse it even if we've seen --end-of-options. - We'll leave "--end-of-options" in the output. This is probably not technically necessary, as a careful caller will do: git rev-parse --end-of-options $revs -- $paths and anything in $revs will be resolved to an object id. However, it does help a slightly less careful caller like: git rev-parse --end-of-options $revs_or_paths where a path "--foo" will remain in the output as long as it also exists on disk. In that case, it's helpful to retain --end-of-options to get passed along to rev-list, s it would otherwise see just "--foo". Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-10 21:40:19 +00:00
gitdir = resolve_gitdir(gitdir);
if (!gitdir)
die(_("not a gitdir '%s'"), argv[i]);
rev-parse: handle --end-of-options We taught rev-list a new way to separate options from revisions in 19e8789b23 (revision: allow --end-of-options to end option parsing, 2019-08-06), but rev-parse uses its own parser. It should know about --end-of-options not only for consistency, but because it may be presented with similarly ambiguous cases. E.g., if a caller does: git rev-parse "$rev" -- "$path" to parse an untrusted input, then it will get confused if $rev contains an option-like string like "--local-env-vars". Or even "--not-real", which we'd keep as an option to pass along to rev-list. Or even more importantly: git rev-parse --verify "$rev" can be confused by options, even though its purpose is safely parsing untrusted input. On the plus side, it will always fail the --verify part, as it will not have parsed a revision, so the caller will generally "fail closed" rather than continue to use the untrusted string. But it will still trigger whatever option was in "$rev"; this should be mostly harmless, since rev-parse options are all read-only, but I didn't carefully audit all paths. This patch lets callers write: git rev-parse --end-of-options "$rev" -- "$path" and: git rev-parse --verify --end-of-options "$rev" which will both treat "$rev" always as a revision parameter. The latter is a bit clunky. It would be nicer if we had defined "--verify" to require that its next argument be the revision. But we have not historically done so, and: git rev-parse --verify -q "$rev" does currently work. I added a test here to confirm that we didn't break that. A few implementation notes: - We don't document --end-of-options explicitly in commands, but rather in gitcli(7). So I didn't give it its own section in git-rev-parse(1). But I did call it out specifically in the --verify section, and include it in the examples, which should show best practices. - We don't have to re-indent the main option-parsing block, because we can combine our "did we see end of options" check with "does it start with a dash". The exception is the pre-setup options, which need their own block. - We do however have to pull the "--" parsing out of the "does it start with dash" block, because we want to parse it even if we've seen --end-of-options. - We'll leave "--end-of-options" in the output. This is probably not technically necessary, as a careful caller will do: git rev-parse --end-of-options $revs -- $paths and anything in $revs will be resolved to an object id. However, it does help a slightly less careful caller like: git rev-parse --end-of-options $revs_or_paths where a path "--foo" will remain in the output as long as it also exists on disk. In that case, it's helpful to retain --end-of-options to get passed along to rev-list, s it would otherwise see just "--foo". Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-10 21:40:19 +00:00
puts(gitdir);
continue;
}
}
/* The rest of the options require a git repository. */
if (!did_repo_setup) {
prefix = setup_git_directory();
git_config(git_default_config, NULL);
did_repo_setup = 1;
prepare_repo_settings(the_repository);
the_repository->settings.command_requires_full_index = 0;
}
rev-parse: handle --end-of-options We taught rev-list a new way to separate options from revisions in 19e8789b23 (revision: allow --end-of-options to end option parsing, 2019-08-06), but rev-parse uses its own parser. It should know about --end-of-options not only for consistency, but because it may be presented with similarly ambiguous cases. E.g., if a caller does: git rev-parse "$rev" -- "$path" to parse an untrusted input, then it will get confused if $rev contains an option-like string like "--local-env-vars". Or even "--not-real", which we'd keep as an option to pass along to rev-list. Or even more importantly: git rev-parse --verify "$rev" can be confused by options, even though its purpose is safely parsing untrusted input. On the plus side, it will always fail the --verify part, as it will not have parsed a revision, so the caller will generally "fail closed" rather than continue to use the untrusted string. But it will still trigger whatever option was in "$rev"; this should be mostly harmless, since rev-parse options are all read-only, but I didn't carefully audit all paths. This patch lets callers write: git rev-parse --end-of-options "$rev" -- "$path" and: git rev-parse --verify --end-of-options "$rev" which will both treat "$rev" always as a revision parameter. The latter is a bit clunky. It would be nicer if we had defined "--verify" to require that its next argument be the revision. But we have not historically done so, and: git rev-parse --verify -q "$rev" does currently work. I added a test here to confirm that we didn't break that. A few implementation notes: - We don't document --end-of-options explicitly in commands, but rather in gitcli(7). So I didn't give it its own section in git-rev-parse(1). But I did call it out specifically in the --verify section, and include it in the examples, which should show best practices. - We don't have to re-indent the main option-parsing block, because we can combine our "did we see end of options" check with "does it start with a dash". The exception is the pre-setup options, which need their own block. - We do however have to pull the "--" parsing out of the "does it start with dash" block, because we want to parse it even if we've seen --end-of-options. - We'll leave "--end-of-options" in the output. This is probably not technically necessary, as a careful caller will do: git rev-parse --end-of-options $revs -- $paths and anything in $revs will be resolved to an object id. However, it does help a slightly less careful caller like: git rev-parse --end-of-options $revs_or_paths where a path "--foo" will remain in the output as long as it also exists on disk. In that case, it's helpful to retain --end-of-options to get passed along to rev-list, s it would otherwise see just "--foo". Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-10 21:40:19 +00:00
if (!strcmp(arg, "--")) {
as_is = 2;
/* Pass on the "--" if we show anything but files.. */
if (filter & (DO_FLAGS | DO_REVS))
show_file(arg, 0);
continue;
}
if (!seen_end_of_options && *arg == '-') {
if (!strcmp(arg, "--git-path")) {
if (!argv[i + 1])
die(_("--git-path requires an argument"));
strbuf_reset(&buf);
print_path(git_path("%s", argv[i + 1]), prefix,
format,
DEFAULT_RELATIVE_IF_SHARED);
i++;
continue;
}
if (!strcmp(arg,"-n")) {
if (++i >= argc)
die(_("-n requires an argument"));
if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
show(arg);
show(argv[i]);
}
continue;
}
if (starts_with(arg, "-n")) {
if ((filter & DO_FLAGS) && (filter & DO_REVS))
show(arg);
continue;
}
if (opt_with_value(arg, "--path-format", &arg)) {
if (!arg)
die(_("--path-format requires an argument"));
if (!strcmp(arg, "absolute")) {
format = FORMAT_CANONICAL;
} else if (!strcmp(arg, "relative")) {
format = FORMAT_RELATIVE;
} else {
die(_("unknown argument to --path-format: %s"), arg);
}
continue;
}
if (!strcmp(arg, "--default")) {
def = argv[++i];
if (!def)
die(_("--default requires an argument"));
continue;
}
if (!strcmp(arg, "--prefix")) {
prefix = argv[++i];
if (!prefix)
die(_("--prefix requires an argument"));
startup_info->prefix = prefix;
output_prefix = 1;
continue;
}
if (!strcmp(arg, "--revs-only")) {
filter &= ~DO_NOREV;
continue;
}
if (!strcmp(arg, "--no-revs")) {
filter &= ~DO_REVS;
continue;
}
if (!strcmp(arg, "--flags")) {
filter &= ~DO_NONFLAGS;
continue;
}
if (!strcmp(arg, "--no-flags")) {
filter &= ~DO_FLAGS;
continue;
}
if (!strcmp(arg, "--verify")) {
filter &= ~(DO_FLAGS|DO_NOREV);
verify = 1;
continue;
}
if (!strcmp(arg, "--quiet") || !strcmp(arg, "-q")) {
quiet = 1;
flags |= GET_OID_QUIETLY;
continue;
}
if (opt_with_value(arg, "--short", &arg)) {
filter &= ~(DO_FLAGS|DO_NOREV);
verify = 1;
abbrev = DEFAULT_ABBREV;
if (!arg)
continue;
abbrev = strtoul(arg, NULL, 10);
if (abbrev < MINIMUM_ABBREV)
abbrev = MINIMUM_ABBREV;
else if (hexsz <= abbrev)
abbrev = hexsz;
continue;
}
if (!strcmp(arg, "--sq")) {
output_sq = 1;
continue;
}
if (!strcmp(arg, "--not")) {
show_type ^= REVERSED;
continue;
}
if (!strcmp(arg, "--symbolic")) {
symbolic = SHOW_SYMBOLIC_ASIS;
continue;
}
if (!strcmp(arg, "--symbolic-full-name")) {
symbolic = SHOW_SYMBOLIC_FULL;
continue;
}
if (opt_with_value(arg, "--abbrev-ref", &arg)) {
abbrev_ref = 1;
abbrev_ref_strict = warn_ambiguous_refs;
if (arg) {
if (!strcmp(arg, "strict"))
abbrev_ref_strict = 1;
else if (!strcmp(arg, "loose"))
abbrev_ref_strict = 0;
else
die(_("unknown mode for --abbrev-ref: %s"),
arg);
}
continue;
}
if (!strcmp(arg, "--all")) {
for_each_ref(show_reference, NULL);
clear_ref_exclusions(&ref_excludes);
continue;
}
if (skip_prefix(arg, "--disambiguate=", &arg)) {
repo_for_each_abbrev(the_repository, arg,
show_abbrev, NULL);
continue;
}
if (!strcmp(arg, "--bisect")) {
for_each_fullref_in("refs/bisect/bad", show_reference, NULL);
for_each_fullref_in("refs/bisect/good", anti_reference, NULL);
continue;
}
if (opt_with_value(arg, "--branches", &arg)) {
if (ref_excludes.hidden_refs_configured)
return error(_("options '%s' and '%s' cannot be used together"),
"--exclude-hidden", "--branches");
handle_ref_opt(arg, "refs/heads/");
continue;
}
if (opt_with_value(arg, "--tags", &arg)) {
if (ref_excludes.hidden_refs_configured)
return error(_("options '%s' and '%s' cannot be used together"),
"--exclude-hidden", "--tags");
handle_ref_opt(arg, "refs/tags/");
continue;
}
if (skip_prefix(arg, "--glob=", &arg)) {
handle_ref_opt(arg, NULL);
continue;
}
if (opt_with_value(arg, "--remotes", &arg)) {
if (ref_excludes.hidden_refs_configured)
return error(_("options '%s' and '%s' cannot be used together"),
"--exclude-hidden", "--remotes");
handle_ref_opt(arg, "refs/remotes/");
continue;
}
if (skip_prefix(arg, "--exclude=", &arg)) {
add_ref_exclusion(&ref_excludes, arg);
continue;
}
if (skip_prefix(arg, "--exclude-hidden=", &arg)) {
exclude_hidden_refs(&ref_excludes, arg);
continue;
}
if (!strcmp(arg, "--show-toplevel")) {
const char *work_tree = get_git_work_tree();
if (work_tree)
print_path(work_tree, prefix, format, DEFAULT_UNMODIFIED);
else
die(_("this operation must be run in a work tree"));
continue;
}
if (!strcmp(arg, "--show-superproject-working-tree")) {
struct strbuf superproject = STRBUF_INIT;
if (get_superproject_working_tree(&superproject))
print_path(superproject.buf, prefix, format, DEFAULT_UNMODIFIED);
strbuf_release(&superproject);
continue;
}
if (!strcmp(arg, "--show-prefix")) {
if (prefix)
puts(prefix);
else
putchar('\n');
continue;
}
if (!strcmp(arg, "--show-cdup")) {
const char *pfx = prefix;
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 (!is_inside_work_tree()) {
const char *work_tree =
get_git_work_tree();
if (work_tree)
printf("%s\n", work_tree);
continue;
}
while (pfx) {
pfx = strchr(pfx, '/');
if (pfx) {
pfx++;
printf("../");
}
}
putchar('\n');
continue;
}
rev-parse: add '--absolute-git-dir' option The output of 'git rev-parse --git-dir' can be either a relative or an absolute path, depending on whether the current working directory is at the top of the worktree or the .git directory or not, or how the path to the repository is specified via the '--git-dir=<path>' option or the $GIT_DIR environment variable. And if that output is a relative path, then it is relative to the directory where any 'git -C <path>' options might have led us. This doesn't matter at all for regular scripts, because the git wrapper automatically takes care of changing directories according to the '-C <path>' options, and the scripts can then simply follow any path returned by 'git rev-parse --git-dir', even if it's a relative path. Our Bash completion script, however, is unique in that it must run directly in the user's interactive shell environment. This means that it's not executed through the git wrapper and would have to take care of any '-C <path> options on its own, and it can't just change directories as it pleases. Consequently, adding support for taking any '-C <path>' options on the command line into account during completion turned out to be considerably more difficult, error prone and required more subshells and git processes when it had to cope with a relative path to the .git directory. Help this rather special use case and teach 'git rev-parse' a new '--absolute-git-dir' option which always outputs a canonicalized absolute path to the .git directory, regardless of whether the path is discovered automatically or is specified via $GIT_DIR or 'git --git-dir=<path>'. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-03 02:48:23 +00:00
if (!strcmp(arg, "--git-dir") ||
!strcmp(arg, "--absolute-git-dir")) {
const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
char *cwd;
int len;
enum format_type wanted = format;
rev-parse: add '--absolute-git-dir' option The output of 'git rev-parse --git-dir' can be either a relative or an absolute path, depending on whether the current working directory is at the top of the worktree or the .git directory or not, or how the path to the repository is specified via the '--git-dir=<path>' option or the $GIT_DIR environment variable. And if that output is a relative path, then it is relative to the directory where any 'git -C <path>' options might have led us. This doesn't matter at all for regular scripts, because the git wrapper automatically takes care of changing directories according to the '-C <path>' options, and the scripts can then simply follow any path returned by 'git rev-parse --git-dir', even if it's a relative path. Our Bash completion script, however, is unique in that it must run directly in the user's interactive shell environment. This means that it's not executed through the git wrapper and would have to take care of any '-C <path> options on its own, and it can't just change directories as it pleases. Consequently, adding support for taking any '-C <path>' options on the command line into account during completion turned out to be considerably more difficult, error prone and required more subshells and git processes when it had to cope with a relative path to the .git directory. Help this rather special use case and teach 'git rev-parse' a new '--absolute-git-dir' option which always outputs a canonicalized absolute path to the .git directory, regardless of whether the path is discovered automatically or is specified via $GIT_DIR or 'git --git-dir=<path>'. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-03 02:48:23 +00:00
if (arg[2] == 'g') { /* --git-dir */
if (gitdir) {
print_path(gitdir, prefix, format, DEFAULT_UNMODIFIED);
rev-parse: add '--absolute-git-dir' option The output of 'git rev-parse --git-dir' can be either a relative or an absolute path, depending on whether the current working directory is at the top of the worktree or the .git directory or not, or how the path to the repository is specified via the '--git-dir=<path>' option or the $GIT_DIR environment variable. And if that output is a relative path, then it is relative to the directory where any 'git -C <path>' options might have led us. This doesn't matter at all for regular scripts, because the git wrapper automatically takes care of changing directories according to the '-C <path>' options, and the scripts can then simply follow any path returned by 'git rev-parse --git-dir', even if it's a relative path. Our Bash completion script, however, is unique in that it must run directly in the user's interactive shell environment. This means that it's not executed through the git wrapper and would have to take care of any '-C <path> options on its own, and it can't just change directories as it pleases. Consequently, adding support for taking any '-C <path>' options on the command line into account during completion turned out to be considerably more difficult, error prone and required more subshells and git processes when it had to cope with a relative path to the .git directory. Help this rather special use case and teach 'git rev-parse' a new '--absolute-git-dir' option which always outputs a canonicalized absolute path to the .git directory, regardless of whether the path is discovered automatically or is specified via $GIT_DIR or 'git --git-dir=<path>'. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-03 02:48:23 +00:00
continue;
}
if (!prefix) {
print_path(".git", prefix, format, DEFAULT_UNMODIFIED);
rev-parse: add '--absolute-git-dir' option The output of 'git rev-parse --git-dir' can be either a relative or an absolute path, depending on whether the current working directory is at the top of the worktree or the .git directory or not, or how the path to the repository is specified via the '--git-dir=<path>' option or the $GIT_DIR environment variable. And if that output is a relative path, then it is relative to the directory where any 'git -C <path>' options might have led us. This doesn't matter at all for regular scripts, because the git wrapper automatically takes care of changing directories according to the '-C <path>' options, and the scripts can then simply follow any path returned by 'git rev-parse --git-dir', even if it's a relative path. Our Bash completion script, however, is unique in that it must run directly in the user's interactive shell environment. This means that it's not executed through the git wrapper and would have to take care of any '-C <path> options on its own, and it can't just change directories as it pleases. Consequently, adding support for taking any '-C <path>' options on the command line into account during completion turned out to be considerably more difficult, error prone and required more subshells and git processes when it had to cope with a relative path to the .git directory. Help this rather special use case and teach 'git rev-parse' a new '--absolute-git-dir' option which always outputs a canonicalized absolute path to the .git directory, regardless of whether the path is discovered automatically or is specified via $GIT_DIR or 'git --git-dir=<path>'. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-03 02:48:23 +00:00
continue;
}
} else { /* --absolute-git-dir */
wanted = FORMAT_CANONICAL;
rev-parse: add '--absolute-git-dir' option The output of 'git rev-parse --git-dir' can be either a relative or an absolute path, depending on whether the current working directory is at the top of the worktree or the .git directory or not, or how the path to the repository is specified via the '--git-dir=<path>' option or the $GIT_DIR environment variable. And if that output is a relative path, then it is relative to the directory where any 'git -C <path>' options might have led us. This doesn't matter at all for regular scripts, because the git wrapper automatically takes care of changing directories according to the '-C <path>' options, and the scripts can then simply follow any path returned by 'git rev-parse --git-dir', even if it's a relative path. Our Bash completion script, however, is unique in that it must run directly in the user's interactive shell environment. This means that it's not executed through the git wrapper and would have to take care of any '-C <path> options on its own, and it can't just change directories as it pleases. Consequently, adding support for taking any '-C <path>' options on the command line into account during completion turned out to be considerably more difficult, error prone and required more subshells and git processes when it had to cope with a relative path to the .git directory. Help this rather special use case and teach 'git rev-parse' a new '--absolute-git-dir' option which always outputs a canonicalized absolute path to the .git directory, regardless of whether the path is discovered automatically or is specified via $GIT_DIR or 'git --git-dir=<path>'. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-03 02:48:23 +00:00
if (!gitdir && !prefix)
gitdir = ".git";
if (gitdir) {
struct strbuf realpath = STRBUF_INIT;
strbuf_realpath(&realpath, gitdir, 1);
puts(realpath.buf);
strbuf_release(&realpath);
rev-parse: add '--absolute-git-dir' option The output of 'git rev-parse --git-dir' can be either a relative or an absolute path, depending on whether the current working directory is at the top of the worktree or the .git directory or not, or how the path to the repository is specified via the '--git-dir=<path>' option or the $GIT_DIR environment variable. And if that output is a relative path, then it is relative to the directory where any 'git -C <path>' options might have led us. This doesn't matter at all for regular scripts, because the git wrapper automatically takes care of changing directories according to the '-C <path>' options, and the scripts can then simply follow any path returned by 'git rev-parse --git-dir', even if it's a relative path. Our Bash completion script, however, is unique in that it must run directly in the user's interactive shell environment. This means that it's not executed through the git wrapper and would have to take care of any '-C <path> options on its own, and it can't just change directories as it pleases. Consequently, adding support for taking any '-C <path>' options on the command line into account during completion turned out to be considerably more difficult, error prone and required more subshells and git processes when it had to cope with a relative path to the .git directory. Help this rather special use case and teach 'git rev-parse' a new '--absolute-git-dir' option which always outputs a canonicalized absolute path to the .git directory, regardless of whether the path is discovered automatically or is specified via $GIT_DIR or 'git --git-dir=<path>'. Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-03 02:48:23 +00:00
continue;
}
}
cwd = xgetcwd();
len = strlen(cwd);
strbuf_reset(&buf);
strbuf_addf(&buf, "%s%s.git", cwd, len && cwd[len-1] != '/' ? "/" : "");
free(cwd);
print_path(buf.buf, prefix, wanted, DEFAULT_CANONICAL);
continue;
}
if (!strcmp(arg, "--git-common-dir")) {
print_path(get_git_common_dir(), prefix, format, DEFAULT_RELATIVE_IF_SHARED);
continue;
}
if (!strcmp(arg, "--is-inside-git-dir")) {
printf("%s\n", is_inside_git_dir() ? "true"
: "false");
continue;
}
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
if (!strcmp(arg, "--is-inside-work-tree")) {
printf("%s\n", is_inside_work_tree() ? "true"
: "false");
continue;
}
if (!strcmp(arg, "--is-bare-repository")) {
printf("%s\n", is_bare_repository() ? "true"
: "false");
continue;
}
if (!strcmp(arg, "--is-shallow-repository")) {
printf("%s\n",
is_repository_shallow(the_repository) ? "true"
: "false");
continue;
}
if (!strcmp(arg, "--shared-index-path")) {
if (repo_read_index(the_repository) < 0)
die(_("Could not read the index"));
if (the_index.split_index) {
const struct object_id *oid = &the_index.split_index->base_oid;
const char *path = git_path("sharedindex.%s", oid_to_hex(oid));
print_path(path, prefix, format, DEFAULT_RELATIVE);
}
continue;
}
if (skip_prefix(arg, "--since=", &arg)) {
show_datestring("--max-age=", arg);
continue;
}
if (skip_prefix(arg, "--after=", &arg)) {
show_datestring("--max-age=", arg);
continue;
}
if (skip_prefix(arg, "--before=", &arg)) {
show_datestring("--min-age=", arg);
continue;
}
if (skip_prefix(arg, "--until=", &arg)) {
show_datestring("--min-age=", arg);
continue;
}
if (opt_with_value(arg, "--show-object-format", &arg)) {
const char *val = arg ? arg : "storage";
if (strcmp(val, "storage") &&
strcmp(val, "input") &&
strcmp(val, "output"))
die(_("unknown mode for --show-object-format: %s"),
arg);
puts(the_hash_algo->name);
continue;
}
if (!strcmp(arg, "--show-ref-format")) {
puts(ref_storage_format_to_name(the_repository->ref_storage_format));
continue;
}
rev-parse: handle --end-of-options We taught rev-list a new way to separate options from revisions in 19e8789b23 (revision: allow --end-of-options to end option parsing, 2019-08-06), but rev-parse uses its own parser. It should know about --end-of-options not only for consistency, but because it may be presented with similarly ambiguous cases. E.g., if a caller does: git rev-parse "$rev" -- "$path" to parse an untrusted input, then it will get confused if $rev contains an option-like string like "--local-env-vars". Or even "--not-real", which we'd keep as an option to pass along to rev-list. Or even more importantly: git rev-parse --verify "$rev" can be confused by options, even though its purpose is safely parsing untrusted input. On the plus side, it will always fail the --verify part, as it will not have parsed a revision, so the caller will generally "fail closed" rather than continue to use the untrusted string. But it will still trigger whatever option was in "$rev"; this should be mostly harmless, since rev-parse options are all read-only, but I didn't carefully audit all paths. This patch lets callers write: git rev-parse --end-of-options "$rev" -- "$path" and: git rev-parse --verify --end-of-options "$rev" which will both treat "$rev" always as a revision parameter. The latter is a bit clunky. It would be nicer if we had defined "--verify" to require that its next argument be the revision. But we have not historically done so, and: git rev-parse --verify -q "$rev" does currently work. I added a test here to confirm that we didn't break that. A few implementation notes: - We don't document --end-of-options explicitly in commands, but rather in gitcli(7). So I didn't give it its own section in git-rev-parse(1). But I did call it out specifically in the --verify section, and include it in the examples, which should show best practices. - We don't have to re-indent the main option-parsing block, because we can combine our "did we see end of options" check with "does it start with a dash". The exception is the pre-setup options, which need their own block. - We do however have to pull the "--" parsing out of the "does it start with dash" block, because we want to parse it even if we've seen --end-of-options. - We'll leave "--end-of-options" in the output. This is probably not technically necessary, as a careful caller will do: git rev-parse --end-of-options $revs -- $paths and anything in $revs will be resolved to an object id. However, it does help a slightly less careful caller like: git rev-parse --end-of-options $revs_or_paths where a path "--foo" will remain in the output as long as it also exists on disk. In that case, it's helpful to retain --end-of-options to get passed along to rev-list, s it would otherwise see just "--foo". Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-10 21:40:19 +00:00
if (!strcmp(arg, "--end-of-options")) {
seen_end_of_options = 1;
if (filter & (DO_FLAGS | DO_REVS))
show_file(arg, 0);
continue;
}
if (show_flag(arg) && verify)
die_no_single_rev(quiet);
continue;
}
/* Not a flag argument */
if (try_difference(arg))
continue;
if (try_parent_shorthands(arg))
continue;
name = arg;
type = NORMAL;
if (*arg == '^') {
name++;
type = REVERSED;
}
if (!get_oid_with_context(the_repository, name,
flags, &oid, &unused)) {
if (verify)
revs_count++;
else
show_rev(type, &oid, name);
continue;
}
if (verify)
die_no_single_rev(quiet);
if (has_dashdash)
die(_("bad revision '%s'"), arg);
as_is = 1;
if (!show_file(arg, output_prefix))
continue;
verify_filename(prefix, arg, 1);
}
rev-parse: fix several options when running in a subdirectory In addition to making git_path() aware of certain file names that need to be handled differently e.g. when running in worktrees, the commit 557bd833bb (git_path(): be aware of file relocation in $GIT_DIR, 2014-11-30) also snuck in a new option for `git rev-parse`: `--git-path`. On the face of it, there is no obvious bug in that commit's diff: it faithfully calls git_path() on the argument and prints it out, i.e. `git rev-parse --git-path <filename>` has the same precise behavior as calling `git_path("<filename>")` in C. The problem lies deeper, much deeper. In hindsight (which is always unfair), implementing the .git/ directory discovery in `setup_git_directory()` by changing the working directory may have allowed us to avoid passing around a struct that contains information about the current repository, but it bought us many, many problems. In this case, when being called in a subdirectory, `git rev-parse` changes the working directory to the top-level directory before calling `git_path()`. In the new working directory, the result is correct. But in the working directory of the calling script, it is incorrect. Example: when calling `git rev-parse --git-path HEAD` in, say, the Documentation/ subdirectory of Git's own source code, the string `.git/HEAD` is printed. Side note: that bug is hidden when running in a subdirectory of a worktree that was added by the `git worktree` command: in that case, the (correct) absolute path of the `HEAD` file is printed. In the interest of time, this patch does not go the "correct" route to introduce a struct with repository information (and removing global state in the process), instead this patch chooses to detect when the command was called in a subdirectory and forces the result to be an absolute path. While at it, we are also fixing the output of --git-common-dir and --shared-index-path. Lastly, please note that we reuse the same strbuf for all of the relative_path() calls; this avoids frequent allocation (and duplicated code), and it does not risk memory leaks, for two reasons: 1) the cmd_rev_parse() function does not return anywhere between the use of the new strbuf instance and its final release, and 2) git-rev-parse is one of these "one-shot" programs in Git, i.e. it exits after running for a very short time, meaning that all allocated memory is released with the exit() call anyway. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-17 16:59:06 +00:00
strbuf_release(&buf);
if (verify) {
if (revs_count == 1) {
show_rev(type, &oid, name);
return 0;
} else if (revs_count == 0 && show_default())
return 0;
die_no_single_rev(quiet);
} else
show_default();
return 0;
}