mirror of
https://github.com/git/git
synced 2024-08-27 19:49:21 +00:00
![Josh Triplett](/assets/img/avatar_default.png)
Add support for dividing the refs of a single repository into multiple namespaces, each of which can have its own branches, tags, and HEAD. Git can expose each namespace as an independent repository to pull from and push to, while sharing the object store, and exposing all the refs to operations such as git-gc. Storing multiple repositories as namespaces of a single repository avoids storing duplicate copies of the same objects, such as when storing multiple branches of the same source. The alternates mechanism provides similar support for avoiding duplicates, but alternates do not prevent duplication between new objects added to the repositories without ongoing maintenance, while namespaces do. To specify a namespace, set the GIT_NAMESPACE environment variable to the namespace. For each ref namespace, git stores the corresponding refs in a directory under refs/namespaces/. For example, GIT_NAMESPACE=foo will store refs under refs/namespaces/foo/. You can also specify namespaces via the --namespace option to git. Note that namespaces which include a / will expand to a hierarchy of namespaces; for example, GIT_NAMESPACE=foo/bar will store refs under refs/namespaces/foo/refs/namespaces/bar/. This makes paths in GIT_NAMESPACE behave hierarchically, so that cloning with GIT_NAMESPACE=foo/bar produces the same result as cloning with GIT_NAMESPACE=foo and cloning from that repo with GIT_NAMESPACE=bar. It also avoids ambiguity with strange namespace paths such as foo/refs/heads/, which could otherwise generate directory/file conflicts within the refs directory. Add the infrastructure for ref namespaces: handle the GIT_NAMESPACE environment variable and --namespace option, and support iterating over refs in a namespace. Signed-off-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Jamey Sharp <jamey@minilop.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
614 lines
17 KiB
C
614 lines
17 KiB
C
#include "builtin.h"
|
|
#include "cache.h"
|
|
#include "exec_cmd.h"
|
|
#include "help.h"
|
|
#include "quote.h"
|
|
#include "run-command.h"
|
|
|
|
const char git_usage_string[] =
|
|
"git [--version] [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
|
|
" [-p|--paginate|--no-pager] [--no-replace-objects] [--bare]\n"
|
|
" [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n"
|
|
" [-c name=value] [--help]\n"
|
|
" <command> [<args>]";
|
|
|
|
const char git_more_info_string[] =
|
|
"See 'git help <command>' for more information on a specific command.";
|
|
|
|
static struct startup_info git_startup_info;
|
|
static int use_pager = -1;
|
|
struct pager_config {
|
|
const char *cmd;
|
|
int want;
|
|
char *value;
|
|
};
|
|
|
|
static int pager_command_config(const char *var, const char *value, void *data)
|
|
{
|
|
struct pager_config *c = data;
|
|
if (!prefixcmp(var, "pager.") && !strcmp(var + 6, c->cmd)) {
|
|
int b = git_config_maybe_bool(var, value);
|
|
if (b >= 0)
|
|
c->want = b;
|
|
else {
|
|
c->want = 1;
|
|
c->value = xstrdup(value);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
|
|
int check_pager_config(const char *cmd)
|
|
{
|
|
struct pager_config c;
|
|
c.cmd = cmd;
|
|
c.want = -1;
|
|
c.value = NULL;
|
|
git_config(pager_command_config, &c);
|
|
if (c.value)
|
|
pager_program = c.value;
|
|
return c.want;
|
|
}
|
|
|
|
static void commit_pager_choice(void) {
|
|
switch (use_pager) {
|
|
case 0:
|
|
setenv("GIT_PAGER", "cat", 1);
|
|
break;
|
|
case 1:
|
|
setup_pager();
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int handle_options(const char ***argv, int *argc, int *envchanged)
|
|
{
|
|
int handled = 0;
|
|
|
|
while (*argc > 0) {
|
|
const char *cmd = (*argv)[0];
|
|
if (cmd[0] != '-')
|
|
break;
|
|
|
|
/*
|
|
* For legacy reasons, the "version" and "help"
|
|
* commands can be written with "--" prepended
|
|
* to make them look like flags.
|
|
*/
|
|
if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version"))
|
|
break;
|
|
|
|
/*
|
|
* Check remaining flags.
|
|
*/
|
|
if (!prefixcmp(cmd, "--exec-path")) {
|
|
cmd += 11;
|
|
if (*cmd == '=')
|
|
git_set_argv_exec_path(cmd + 1);
|
|
else {
|
|
puts(git_exec_path());
|
|
exit(0);
|
|
}
|
|
} else if (!strcmp(cmd, "--html-path")) {
|
|
puts(system_path(GIT_HTML_PATH));
|
|
exit(0);
|
|
} else if (!strcmp(cmd, "--man-path")) {
|
|
puts(system_path(GIT_MAN_PATH));
|
|
exit(0);
|
|
} else if (!strcmp(cmd, "--info-path")) {
|
|
puts(system_path(GIT_INFO_PATH));
|
|
exit(0);
|
|
} else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
|
|
use_pager = 1;
|
|
} else if (!strcmp(cmd, "--no-pager")) {
|
|
use_pager = 0;
|
|
if (envchanged)
|
|
*envchanged = 1;
|
|
} else if (!strcmp(cmd, "--no-replace-objects")) {
|
|
read_replace_refs = 0;
|
|
setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);
|
|
if (envchanged)
|
|
*envchanged = 1;
|
|
} else if (!strcmp(cmd, "--git-dir")) {
|
|
if (*argc < 2) {
|
|
fprintf(stderr, "No directory given for --git-dir.\n" );
|
|
usage(git_usage_string);
|
|
}
|
|
setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
|
|
if (envchanged)
|
|
*envchanged = 1;
|
|
(*argv)++;
|
|
(*argc)--;
|
|
handled++;
|
|
} else if (!prefixcmp(cmd, "--git-dir=")) {
|
|
setenv(GIT_DIR_ENVIRONMENT, cmd + 10, 1);
|
|
if (envchanged)
|
|
*envchanged = 1;
|
|
} else if (!strcmp(cmd, "--namespace")) {
|
|
if (*argc < 2) {
|
|
fprintf(stderr, "No namespace given for --namespace.\n" );
|
|
usage(git_usage_string);
|
|
}
|
|
setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
|
|
if (envchanged)
|
|
*envchanged = 1;
|
|
(*argv)++;
|
|
(*argc)--;
|
|
} else if (!prefixcmp(cmd, "--namespace=")) {
|
|
setenv(GIT_NAMESPACE_ENVIRONMENT, cmd + 12, 1);
|
|
if (envchanged)
|
|
*envchanged = 1;
|
|
} else if (!strcmp(cmd, "--work-tree")) {
|
|
if (*argc < 2) {
|
|
fprintf(stderr, "No directory given for --work-tree.\n" );
|
|
usage(git_usage_string);
|
|
}
|
|
setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
|
|
if (envchanged)
|
|
*envchanged = 1;
|
|
(*argv)++;
|
|
(*argc)--;
|
|
} else if (!prefixcmp(cmd, "--work-tree=")) {
|
|
setenv(GIT_WORK_TREE_ENVIRONMENT, cmd + 12, 1);
|
|
if (envchanged)
|
|
*envchanged = 1;
|
|
} else if (!strcmp(cmd, "--bare")) {
|
|
static char git_dir[PATH_MAX+1];
|
|
is_bare_repository_cfg = 1;
|
|
setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0);
|
|
if (envchanged)
|
|
*envchanged = 1;
|
|
} else if (!strcmp(cmd, "-c")) {
|
|
if (*argc < 2) {
|
|
fprintf(stderr, "-c expects a configuration string\n" );
|
|
usage(git_usage_string);
|
|
}
|
|
git_config_push_parameter((*argv)[1]);
|
|
(*argv)++;
|
|
(*argc)--;
|
|
} else {
|
|
fprintf(stderr, "Unknown option: %s\n", cmd);
|
|
usage(git_usage_string);
|
|
}
|
|
|
|
(*argv)++;
|
|
(*argc)--;
|
|
handled++;
|
|
}
|
|
return handled;
|
|
}
|
|
|
|
static int handle_alias(int *argcp, const char ***argv)
|
|
{
|
|
int envchanged = 0, ret = 0, saved_errno = errno;
|
|
const char *subdir;
|
|
int count, option_count;
|
|
const char **new_argv;
|
|
const char *alias_command;
|
|
char *alias_string;
|
|
int unused_nongit;
|
|
|
|
subdir = setup_git_directory_gently(&unused_nongit);
|
|
|
|
alias_command = (*argv)[0];
|
|
alias_string = alias_lookup(alias_command);
|
|
if (alias_string) {
|
|
if (alias_string[0] == '!') {
|
|
const char **alias_argv;
|
|
int argc = *argcp, i;
|
|
struct strbuf sb = STRBUF_INIT;
|
|
const char *env[2];
|
|
|
|
commit_pager_choice();
|
|
|
|
/* build alias_argv */
|
|
alias_argv = xmalloc(sizeof(*alias_argv) * (argc + 1));
|
|
alias_argv[0] = alias_string + 1;
|
|
for (i = 1; i < argc; ++i)
|
|
alias_argv[i] = (*argv)[i];
|
|
alias_argv[argc] = NULL;
|
|
|
|
strbuf_addstr(&sb, "GIT_PREFIX=");
|
|
if (subdir)
|
|
strbuf_addstr(&sb, subdir);
|
|
env[0] = sb.buf;
|
|
env[1] = NULL;
|
|
ret = run_command_v_opt_cd_env(alias_argv, RUN_USING_SHELL, NULL, env);
|
|
strbuf_release(&sb);
|
|
if (ret >= 0) /* normal exit */
|
|
exit(ret);
|
|
|
|
die_errno("While expanding alias '%s': '%s'",
|
|
alias_command, alias_string + 1);
|
|
}
|
|
count = split_cmdline(alias_string, &new_argv);
|
|
if (count < 0)
|
|
die("Bad alias.%s string: %s", alias_command,
|
|
split_cmdline_strerror(count));
|
|
option_count = handle_options(&new_argv, &count, &envchanged);
|
|
if (envchanged)
|
|
die("alias '%s' changes environment variables\n"
|
|
"You can use '!git' in the alias to do this.",
|
|
alias_command);
|
|
memmove(new_argv - option_count, new_argv,
|
|
count * sizeof(char *));
|
|
new_argv -= option_count;
|
|
|
|
if (count < 1)
|
|
die("empty alias for %s", alias_command);
|
|
|
|
if (!strcmp(alias_command, new_argv[0]))
|
|
die("recursive alias: %s", alias_command);
|
|
|
|
trace_argv_printf(new_argv,
|
|
"trace: alias expansion: %s =>",
|
|
alias_command);
|
|
|
|
new_argv = xrealloc(new_argv, sizeof(char *) *
|
|
(count + *argcp));
|
|
/* insert after command name */
|
|
memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
|
|
|
|
*argv = new_argv;
|
|
*argcp += count - 1;
|
|
|
|
ret = 1;
|
|
}
|
|
|
|
if (subdir && chdir(subdir))
|
|
die_errno("Cannot change to '%s'", subdir);
|
|
|
|
errno = saved_errno;
|
|
|
|
return ret;
|
|
}
|
|
|
|
const char git_version_string[] = GIT_VERSION;
|
|
|
|
#define RUN_SETUP (1<<0)
|
|
#define RUN_SETUP_GENTLY (1<<1)
|
|
#define USE_PAGER (1<<2)
|
|
/*
|
|
* require working tree to be present -- anything uses this needs
|
|
* RUN_SETUP for reading from the configuration file.
|
|
*/
|
|
#define NEED_WORK_TREE (1<<3)
|
|
|
|
struct cmd_struct {
|
|
const char *cmd;
|
|
int (*fn)(int, const char **, const char *);
|
|
int option;
|
|
};
|
|
|
|
static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
|
|
{
|
|
int status, help;
|
|
struct stat st;
|
|
const char *prefix;
|
|
|
|
prefix = NULL;
|
|
help = argc == 2 && !strcmp(argv[1], "-h");
|
|
if (!help) {
|
|
if (p->option & RUN_SETUP)
|
|
prefix = setup_git_directory();
|
|
if (p->option & RUN_SETUP_GENTLY) {
|
|
int nongit_ok;
|
|
prefix = setup_git_directory_gently(&nongit_ok);
|
|
}
|
|
|
|
if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY))
|
|
use_pager = check_pager_config(p->cmd);
|
|
if (use_pager == -1 && p->option & USE_PAGER)
|
|
use_pager = 1;
|
|
|
|
if ((p->option & (RUN_SETUP | RUN_SETUP_GENTLY)) &&
|
|
startup_info->have_repository) /* get_git_dir() may set up repo, avoid that */
|
|
trace_repo_setup(prefix);
|
|
}
|
|
commit_pager_choice();
|
|
|
|
if (!help && p->option & NEED_WORK_TREE)
|
|
setup_work_tree();
|
|
|
|
trace_argv_printf(argv, "trace: built-in: git");
|
|
|
|
status = p->fn(argc, argv, prefix);
|
|
if (status)
|
|
return status;
|
|
|
|
/* Somebody closed stdout? */
|
|
if (fstat(fileno(stdout), &st))
|
|
return 0;
|
|
/* Ignore write errors for pipes and sockets.. */
|
|
if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode))
|
|
return 0;
|
|
|
|
/* Check for ENOSPC and EIO errors.. */
|
|
if (fflush(stdout))
|
|
die_errno("write failure on standard output");
|
|
if (ferror(stdout))
|
|
die("unknown write failure on standard output");
|
|
if (fclose(stdout))
|
|
die_errno("close failed on standard output");
|
|
return 0;
|
|
}
|
|
|
|
static void handle_internal_command(int argc, const char **argv)
|
|
{
|
|
const char *cmd = argv[0];
|
|
static struct cmd_struct commands[] = {
|
|
{ "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "annotate", cmd_annotate, RUN_SETUP },
|
|
{ "apply", cmd_apply, RUN_SETUP_GENTLY },
|
|
{ "archive", cmd_archive },
|
|
{ "bisect--helper", cmd_bisect__helper, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "blame", cmd_blame, RUN_SETUP },
|
|
{ "branch", cmd_branch, RUN_SETUP },
|
|
{ "bundle", cmd_bundle, RUN_SETUP_GENTLY },
|
|
{ "cat-file", cmd_cat_file, RUN_SETUP },
|
|
{ "check-attr", cmd_check_attr, RUN_SETUP },
|
|
{ "check-ref-format", cmd_check_ref_format },
|
|
{ "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "checkout-index", cmd_checkout_index,
|
|
RUN_SETUP | NEED_WORK_TREE},
|
|
{ "cherry", cmd_cherry, RUN_SETUP },
|
|
{ "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "clone", cmd_clone },
|
|
{ "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "commit-tree", cmd_commit_tree, RUN_SETUP },
|
|
{ "config", cmd_config, RUN_SETUP_GENTLY },
|
|
{ "count-objects", cmd_count_objects, RUN_SETUP },
|
|
{ "describe", cmd_describe, RUN_SETUP },
|
|
{ "diff", cmd_diff },
|
|
{ "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "diff-index", cmd_diff_index, RUN_SETUP },
|
|
{ "diff-tree", cmd_diff_tree, RUN_SETUP },
|
|
{ "fast-export", cmd_fast_export, RUN_SETUP },
|
|
{ "fetch", cmd_fetch, RUN_SETUP },
|
|
{ "fetch-pack", cmd_fetch_pack, RUN_SETUP },
|
|
{ "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
|
|
{ "for-each-ref", cmd_for_each_ref, RUN_SETUP },
|
|
{ "format-patch", cmd_format_patch, RUN_SETUP },
|
|
{ "fsck", cmd_fsck, RUN_SETUP },
|
|
{ "fsck-objects", cmd_fsck, RUN_SETUP },
|
|
{ "gc", cmd_gc, RUN_SETUP },
|
|
{ "get-tar-commit-id", cmd_get_tar_commit_id },
|
|
{ "grep", cmd_grep, RUN_SETUP_GENTLY },
|
|
{ "hash-object", cmd_hash_object },
|
|
{ "help", cmd_help },
|
|
{ "index-pack", cmd_index_pack, RUN_SETUP_GENTLY },
|
|
{ "init", cmd_init_db },
|
|
{ "init-db", cmd_init_db },
|
|
{ "log", cmd_log, RUN_SETUP },
|
|
{ "ls-files", cmd_ls_files, RUN_SETUP },
|
|
{ "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
|
|
{ "ls-tree", cmd_ls_tree, RUN_SETUP },
|
|
{ "mailinfo", cmd_mailinfo },
|
|
{ "mailsplit", cmd_mailsplit },
|
|
{ "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "merge-base", cmd_merge_base, RUN_SETUP },
|
|
{ "merge-file", cmd_merge_file, RUN_SETUP_GENTLY },
|
|
{ "merge-index", cmd_merge_index, RUN_SETUP },
|
|
{ "merge-ours", cmd_merge_ours, RUN_SETUP },
|
|
{ "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "merge-tree", cmd_merge_tree, RUN_SETUP },
|
|
{ "mktag", cmd_mktag, RUN_SETUP },
|
|
{ "mktree", cmd_mktree, RUN_SETUP },
|
|
{ "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "name-rev", cmd_name_rev, RUN_SETUP },
|
|
{ "notes", cmd_notes, RUN_SETUP },
|
|
{ "pack-objects", cmd_pack_objects, RUN_SETUP },
|
|
{ "pack-redundant", cmd_pack_redundant, RUN_SETUP },
|
|
{ "pack-refs", cmd_pack_refs, RUN_SETUP },
|
|
{ "patch-id", cmd_patch_id },
|
|
{ "peek-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
|
|
{ "pickaxe", cmd_blame, RUN_SETUP },
|
|
{ "prune", cmd_prune, RUN_SETUP },
|
|
{ "prune-packed", cmd_prune_packed, RUN_SETUP },
|
|
{ "push", cmd_push, RUN_SETUP },
|
|
{ "read-tree", cmd_read_tree, RUN_SETUP },
|
|
{ "receive-pack", cmd_receive_pack },
|
|
{ "reflog", cmd_reflog, RUN_SETUP },
|
|
{ "remote", cmd_remote, RUN_SETUP },
|
|
{ "remote-ext", cmd_remote_ext },
|
|
{ "remote-fd", cmd_remote_fd },
|
|
{ "replace", cmd_replace, RUN_SETUP },
|
|
{ "repo-config", cmd_repo_config, RUN_SETUP_GENTLY },
|
|
{ "rerere", cmd_rerere, RUN_SETUP },
|
|
{ "reset", cmd_reset, RUN_SETUP },
|
|
{ "rev-list", cmd_rev_list, RUN_SETUP },
|
|
{ "rev-parse", cmd_rev_parse },
|
|
{ "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "rm", cmd_rm, RUN_SETUP },
|
|
{ "send-pack", cmd_send_pack, RUN_SETUP },
|
|
{ "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER },
|
|
{ "show", cmd_show, RUN_SETUP },
|
|
{ "show-branch", cmd_show_branch, RUN_SETUP },
|
|
{ "show-ref", cmd_show_ref, RUN_SETUP },
|
|
{ "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
|
|
{ "stripspace", cmd_stripspace },
|
|
{ "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
|
|
{ "tag", cmd_tag, RUN_SETUP },
|
|
{ "tar-tree", cmd_tar_tree },
|
|
{ "unpack-file", cmd_unpack_file, RUN_SETUP },
|
|
{ "unpack-objects", cmd_unpack_objects, RUN_SETUP },
|
|
{ "update-index", cmd_update_index, RUN_SETUP },
|
|
{ "update-ref", cmd_update_ref, RUN_SETUP },
|
|
{ "update-server-info", cmd_update_server_info, RUN_SETUP },
|
|
{ "upload-archive", cmd_upload_archive },
|
|
{ "var", cmd_var, RUN_SETUP_GENTLY },
|
|
{ "verify-pack", cmd_verify_pack },
|
|
{ "verify-tag", cmd_verify_tag, RUN_SETUP },
|
|
{ "version", cmd_version },
|
|
{ "whatchanged", cmd_whatchanged, RUN_SETUP },
|
|
{ "write-tree", cmd_write_tree, RUN_SETUP },
|
|
};
|
|
int i;
|
|
static const char ext[] = STRIP_EXTENSION;
|
|
|
|
if (sizeof(ext) > 1) {
|
|
i = strlen(argv[0]) - strlen(ext);
|
|
if (i > 0 && !strcmp(argv[0] + i, ext)) {
|
|
char *argv0 = xstrdup(argv[0]);
|
|
argv[0] = cmd = argv0;
|
|
argv0[i] = '\0';
|
|
}
|
|
}
|
|
|
|
/* Turn "git cmd --help" into "git help cmd" */
|
|
if (argc > 1 && !strcmp(argv[1], "--help")) {
|
|
argv[1] = argv[0];
|
|
argv[0] = cmd = "help";
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(commands); i++) {
|
|
struct cmd_struct *p = commands+i;
|
|
if (strcmp(p->cmd, cmd))
|
|
continue;
|
|
exit(run_builtin(p, argc, argv));
|
|
}
|
|
}
|
|
|
|
static void execv_dashed_external(const char **argv)
|
|
{
|
|
struct strbuf cmd = STRBUF_INIT;
|
|
const char *tmp;
|
|
int status;
|
|
|
|
commit_pager_choice();
|
|
|
|
strbuf_addf(&cmd, "git-%s", argv[0]);
|
|
|
|
/*
|
|
* argv[0] must be the git command, but the argv array
|
|
* belongs to the caller, and may be reused in
|
|
* subsequent loop iterations. Save argv[0] and
|
|
* restore it on error.
|
|
*/
|
|
tmp = argv[0];
|
|
argv[0] = cmd.buf;
|
|
|
|
trace_argv_printf(argv, "trace: exec:");
|
|
|
|
/*
|
|
* if we fail because the command is not found, it is
|
|
* OK to return. Otherwise, we just pass along the status code.
|
|
*/
|
|
status = run_command_v_opt(argv, RUN_SILENT_EXEC_FAILURE);
|
|
if (status >= 0 || errno != ENOENT)
|
|
exit(status);
|
|
|
|
argv[0] = tmp;
|
|
|
|
strbuf_release(&cmd);
|
|
}
|
|
|
|
static int run_argv(int *argcp, const char ***argv)
|
|
{
|
|
int done_alias = 0;
|
|
|
|
while (1) {
|
|
/* See if it's an internal command */
|
|
handle_internal_command(*argcp, *argv);
|
|
|
|
/* .. then try the external ones */
|
|
execv_dashed_external(*argv);
|
|
|
|
/* It could be an alias -- this works around the insanity
|
|
* of overriding "git log" with "git show" by having
|
|
* alias.log = show
|
|
*/
|
|
if (done_alias || !handle_alias(argcp, argv))
|
|
break;
|
|
done_alias = 1;
|
|
}
|
|
|
|
return done_alias;
|
|
}
|
|
|
|
|
|
int main(int argc, const char **argv)
|
|
{
|
|
const char *cmd;
|
|
|
|
startup_info = &git_startup_info;
|
|
|
|
cmd = git_extract_argv0_path(argv[0]);
|
|
if (!cmd)
|
|
cmd = "git-help";
|
|
|
|
/*
|
|
* "git-xxxx" is the same as "git xxxx", but we obviously:
|
|
*
|
|
* - cannot take flags in between the "git" and the "xxxx".
|
|
* - cannot execute it externally (since it would just do
|
|
* the same thing over again)
|
|
*
|
|
* So we just directly call the internal command handler, and
|
|
* die if that one cannot handle it.
|
|
*/
|
|
if (!prefixcmp(cmd, "git-")) {
|
|
cmd += 4;
|
|
argv[0] = cmd;
|
|
handle_internal_command(argc, argv);
|
|
die("cannot handle %s internally", cmd);
|
|
}
|
|
|
|
/* Look for flags.. */
|
|
argv++;
|
|
argc--;
|
|
handle_options(&argv, &argc, NULL);
|
|
if (argc > 0) {
|
|
if (!prefixcmp(argv[0], "--"))
|
|
argv[0] += 2;
|
|
} else {
|
|
/* The user didn't specify a command; give them help */
|
|
commit_pager_choice();
|
|
printf("usage: %s\n\n", git_usage_string);
|
|
list_common_cmds_help();
|
|
printf("\n%s\n", git_more_info_string);
|
|
exit(1);
|
|
}
|
|
cmd = argv[0];
|
|
|
|
/*
|
|
* We use PATH to find git commands, but we prepend some higher
|
|
* precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
|
|
* environment, and the $(gitexecdir) from the Makefile at build
|
|
* time.
|
|
*/
|
|
setup_path();
|
|
|
|
while (1) {
|
|
static int done_help = 0;
|
|
static int was_alias = 0;
|
|
was_alias = run_argv(&argc, &argv);
|
|
if (errno != ENOENT)
|
|
break;
|
|
if (was_alias) {
|
|
fprintf(stderr, "Expansion of alias '%s' failed; "
|
|
"'%s' is not a git command\n",
|
|
cmd, argv[0]);
|
|
exit(1);
|
|
}
|
|
if (!done_help) {
|
|
cmd = argv[0] = help_unknown_cmd(cmd);
|
|
done_help = 1;
|
|
} else
|
|
break;
|
|
}
|
|
|
|
fprintf(stderr, "Failed to run command '%s': %s\n",
|
|
cmd, strerror(errno));
|
|
|
|
return 1;
|
|
}
|