Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

390 lines (338 sloc) 9.331 kb
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include "git-compat-util.h"
#include "exec_cmd.h"
#include "cache.h"
#include "quote.h"
#include "builtin.h"
const char git_usage_string[] =
"git [--version] [--exec-path[=GIT_EXEC_PATH]] [--help] COMMAND [ ARGS ]";
static void prepend_to_path(const char *dir, int len)
{
const char *old_path = getenv("PATH");
char *path;
int path_len = len;
if (!old_path)
old_path = "/usr/local/bin:/usr/bin:/bin";
path_len = len + strlen(old_path) + 1;
path = malloc(path_len + 1);
memcpy(path, dir, len);
path[len] = ':';
memcpy(path + len + 1, old_path, path_len - len);
setenv("PATH", path, 1);
}
static int handle_options(const char*** argv, int* argc)
{
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 (!strncmp(cmd, "--exec-path", 11)) {
cmd += 11;
if (*cmd == '=')
git_set_exec_path(cmd + 1);
else {
puts(git_exec_path());
exit(0);
}
} else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
setup_pager();
} else if (!strcmp(cmd, "--git-dir")) {
if (*argc < 1)
return -1;
setenv("GIT_DIR", (*argv)[1], 1);
(*argv)++;
(*argc)--;
} else if (!strncmp(cmd, "--git-dir=", 10)) {
setenv("GIT_DIR", cmd + 10, 1);
} else if (!strcmp(cmd, "--bare")) {
static char git_dir[1024];
setenv("GIT_DIR", getcwd(git_dir, 1024), 1);
} else {
fprintf(stderr, "Unknown option: %s\n", cmd);
usage(git_usage_string);
}
(*argv)++;
(*argc)--;
handled++;
}
return handled;
}
static const char *alias_command;
static char *alias_string = NULL;
static int git_alias_config(const char *var, const char *value)
{
if (!strncmp(var, "alias.", 6) && !strcmp(var + 6, alias_command)) {
alias_string = strdup(value);
}
return 0;
}
static int split_cmdline(char *cmdline, const char ***argv)
{
int src, dst, count = 0, size = 16;
char quoted = 0;
*argv = malloc(sizeof(char*) * size);
/* split alias_string */
(*argv)[count++] = cmdline;
for (src = dst = 0; cmdline[src];) {
char c = cmdline[src];
if (!quoted && isspace(c)) {
cmdline[dst++] = 0;
while (cmdline[++src]
&& isspace(cmdline[src]))
; /* skip */
if (count >= size) {
size += 16;
*argv = realloc(*argv, sizeof(char*) * size);
}
(*argv)[count++] = cmdline + dst;
} else if(!quoted && (c == '\'' || c == '"')) {
quoted = c;
src++;
} else if (c == quoted) {
quoted = 0;
src++;
} else {
if (c == '\\' && quoted != '\'') {
src++;
c = cmdline[src];
if (!c) {
free(*argv);
*argv = NULL;
return error("cmdline ends with \\");
}
}
cmdline[dst++] = c;
src++;
}
}
cmdline[dst] = 0;
if (quoted) {
free(*argv);
*argv = NULL;
return error("unclosed quote");
}
return count;
}
static int handle_alias(int *argcp, const char ***argv)
{
int nongit = 0, ret = 0, saved_errno = errno;
const char *subdir;
int count, option_count;
const char** new_argv;
subdir = setup_git_directory_gently(&nongit);
alias_command = (*argv)[0];
git_config(git_alias_config);
if (alias_string) {
count = split_cmdline(alias_string, &new_argv);
option_count = handle_options(&new_argv, &count);
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);
if (getenv("GIT_TRACE")) {
int i;
fprintf(stderr, "trace: alias expansion: %s =>",
alias_command);
for (i = 0; i < count; ++i) {
fputc(' ', stderr);
sq_quote_print(stderr, new_argv[i]);
}
fputc('\n', stderr);
fflush(stderr);
}
new_argv = realloc(new_argv, sizeof(char*) *
(count + *argcp + 1));
/* insert after command name */
memcpy(new_argv + count, *argv + 1, sizeof(char*) * *argcp);
new_argv[count+*argcp] = NULL;
*argv = new_argv;
*argcp += count - 1;
ret = 1;
}
if (subdir)
chdir(subdir);
errno = saved_errno;
return ret;
}
const char git_version_string[] = GIT_VERSION;
#define NEEDS_PREFIX 1
#define USE_PAGER 2
static void handle_internal_command(int argc, const char **argv, char **envp)
{
const char *cmd = argv[0];
static struct cmd_struct {
const char *cmd;
int (*fn)(int, const char **, const char *);
int option;
} commands[] = {
{ "version", cmd_version },
{ "help", cmd_help },
{ "log", cmd_log, NEEDS_PREFIX | USE_PAGER },
{ "whatchanged", cmd_whatchanged, NEEDS_PREFIX | USE_PAGER },
{ "show", cmd_show, NEEDS_PREFIX | USE_PAGER },
{ "push", cmd_push, NEEDS_PREFIX },
{ "format-patch", cmd_format_patch, NEEDS_PREFIX },
{ "count-objects", cmd_count_objects },
{ "diff", cmd_diff, NEEDS_PREFIX },
{ "grep", cmd_grep, NEEDS_PREFIX },
{ "rm", cmd_rm, NEEDS_PREFIX },
{ "add", cmd_add, NEEDS_PREFIX },
{ "rev-list", cmd_rev_list, NEEDS_PREFIX },
{ "init-db", cmd_init_db },
{ "get-tar-commit-id", cmd_get_tar_commit_id },
{ "upload-tar", cmd_upload_tar },
{ "check-ref-format", cmd_check_ref_format },
{ "ls-files", cmd_ls_files, NEEDS_PREFIX },
{ "ls-tree", cmd_ls_tree, NEEDS_PREFIX },
{ "tar-tree", cmd_tar_tree, NEEDS_PREFIX },
{ "read-tree", cmd_read_tree, NEEDS_PREFIX },
{ "commit-tree", cmd_commit_tree, NEEDS_PREFIX },
{ "apply", cmd_apply },
{ "show-branch", cmd_show_branch, NEEDS_PREFIX },
{ "diff-files", cmd_diff_files, NEEDS_PREFIX },
{ "diff-index", cmd_diff_index, NEEDS_PREFIX },
{ "diff-stages", cmd_diff_stages, NEEDS_PREFIX },
{ "diff-tree", cmd_diff_tree, NEEDS_PREFIX },
{ "cat-file", cmd_cat_file, NEEDS_PREFIX },
{ "rev-parse", cmd_rev_parse, NEEDS_PREFIX },
{ "write-tree", cmd_write_tree, NEEDS_PREFIX },
{ "mailsplit", cmd_mailsplit },
{ "mailinfo", cmd_mailinfo },
{ "stripspace", cmd_stripspace },
{ "update-index", cmd_update_index, NEEDS_PREFIX },
{ "update-ref", cmd_update_ref, NEEDS_PREFIX },
{ "fmt-merge-msg", cmd_fmt_merge_msg, NEEDS_PREFIX },
{ "prune", cmd_prune, NEEDS_PREFIX },
{ "mv", cmd_mv, NEEDS_PREFIX },
{ "prune-packed", cmd_prune_packed, NEEDS_PREFIX },
{ "repo-config", cmd_repo_config },
};
int i;
/* 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;
const char *prefix;
if (strcmp(p->cmd, cmd))
continue;
prefix = NULL;
if (p->option & NEEDS_PREFIX)
prefix = setup_git_directory();
if (p->option & USE_PAGER)
setup_pager();
if (getenv("GIT_TRACE")) {
int i;
fprintf(stderr, "trace: built-in: git");
for (i = 0; i < argc; ++i) {
fputc(' ', stderr);
sq_quote_print(stderr, argv[i]);
}
putc('\n', stderr);
fflush(stderr);
}
exit(p->fn(argc, argv, prefix));
}
}
int main(int argc, const char **argv, char **envp)
{
const char *cmd = argv[0];
char *slash = strrchr(cmd, '/');
const char *exec_path = NULL;
int done_alias = 0;
/*
* Take the basename of argv[0] as the command
* name, and the dirname as the default exec_path
* if it's an absolute path and we don't have
* anything better.
*/
if (slash) {
*slash++ = 0;
if (*cmd == '/')
exec_path = cmd;
cmd = slash;
}
/*
* "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 (!strncmp(cmd, "git-", 4)) {
cmd += 4;
argv[0] = cmd;
handle_internal_command(argc, argv, envp);
die("cannot handle %s internally", cmd);
}
/* Look for flags.. */
argv++;
argc--;
handle_options(&argv, &argc);
if (argc > 0) {
if (!strncmp(argv[0], "--", 2))
argv[0] += 2;
} else {
/* Default command: "help" */
argv[0] = "help";
argc = 1;
}
cmd = argv[0];
/*
* We search for git commands in the following order:
* - git_exec_path()
* - the path of the "git" command if we could find it
* in $0
* - the regular PATH.
*/
if (exec_path)
prepend_to_path(exec_path, strlen(exec_path));
exec_path = git_exec_path();
prepend_to_path(exec_path, strlen(exec_path));
while (1) {
/* See if it's an internal command */
handle_internal_command(argc, argv, envp);
/* .. then try the external ones */
execv_git_cmd(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(&argc, &argv))
break;
done_alias = 1;
}
if (errno == ENOENT)
help_unknown_cmd(cmd);
fprintf(stderr, "Failed to run command '%s': %s\n",
cmd, strerror(errno));
return 1;
}
Jump to Line
Something went wrong with that request. Please try again.