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

472 lines (405 sloc) 10.466 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 <sys/ioctl.h>
#include "git-compat-util.h"
#include "exec_cmd.h"
#include "common-cmds.h"
#include "cache.h"
#include "commit.h"
#include "revision.h"
#ifndef PATH_MAX
# define PATH_MAX 4096
#endif
static const char git_usage[] =
"Usage: git [--version] [--exec-path[=GIT_EXEC_PATH]] [--help] COMMAND [ ARGS ]";
/* most gui terms set COLUMNS (although some don't export it) */
static int term_columns(void)
{
char *col_string = getenv("COLUMNS");
int n_cols = 0;
if (col_string && (n_cols = atoi(col_string)) > 0)
return n_cols;
#ifdef TIOCGWINSZ
{
struct winsize ws;
if (!ioctl(1, TIOCGWINSZ, &ws)) {
if (ws.ws_col)
return ws.ws_col;
}
}
#endif
return 80;
}
static void oom(void)
{
fprintf(stderr, "git: out of memory\n");
exit(1);
}
static inline void mput_char(char c, unsigned int num)
{
while(num--)
putchar(c);
}
static struct cmdname {
size_t len;
char name[1];
} **cmdname;
static int cmdname_alloc, cmdname_cnt;
static void add_cmdname(const char *name, int len)
{
struct cmdname *ent;
if (cmdname_alloc <= cmdname_cnt) {
cmdname_alloc = cmdname_alloc + 200;
cmdname = realloc(cmdname, cmdname_alloc * sizeof(*cmdname));
if (!cmdname)
oom();
}
ent = malloc(sizeof(*ent) + len);
if (!ent)
oom();
ent->len = len;
memcpy(ent->name, name, len);
ent->name[len] = 0;
cmdname[cmdname_cnt++] = ent;
}
static int cmdname_compare(const void *a_, const void *b_)
{
struct cmdname *a = *(struct cmdname **)a_;
struct cmdname *b = *(struct cmdname **)b_;
return strcmp(a->name, b->name);
}
static void pretty_print_string_list(struct cmdname **cmdname, int longest)
{
int cols = 1, rows;
int space = longest + 1; /* min 1 SP between words */
int max_cols = term_columns() - 1; /* don't print *on* the edge */
int i, j;
if (space < max_cols)
cols = max_cols / space;
rows = (cmdname_cnt + cols - 1) / cols;
qsort(cmdname, cmdname_cnt, sizeof(*cmdname), cmdname_compare);
for (i = 0; i < rows; i++) {
printf(" ");
for (j = 0; j < cols; j++) {
int n = j * rows + i;
int size = space;
if (n >= cmdname_cnt)
break;
if (j == cols-1 || n + rows >= cmdname_cnt)
size = 1;
printf("%-*s", size, cmdname[n]->name);
}
putchar('\n');
}
}
static void list_commands(const char *exec_path, const char *pattern)
{
unsigned int longest = 0;
char path[PATH_MAX];
int dirlen;
DIR *dir = opendir(exec_path);
struct dirent *de;
if (!dir) {
fprintf(stderr, "git: '%s': %s\n", exec_path, strerror(errno));
exit(1);
}
dirlen = strlen(exec_path);
if (PATH_MAX - 20 < dirlen) {
fprintf(stderr, "git: insanely long exec-path '%s'\n",
exec_path);
exit(1);
}
memcpy(path, exec_path, dirlen);
path[dirlen++] = '/';
while ((de = readdir(dir)) != NULL) {
struct stat st;
int entlen;
if (strncmp(de->d_name, "git-", 4))
continue;
strcpy(path+dirlen, de->d_name);
if (stat(path, &st) || /* stat, not lstat */
!S_ISREG(st.st_mode) ||
!(st.st_mode & S_IXUSR))
continue;
entlen = strlen(de->d_name);
if (4 < entlen && !strcmp(de->d_name + entlen - 4, ".exe"))
entlen -= 4;
if (longest < entlen)
longest = entlen;
add_cmdname(de->d_name + 4, entlen-4);
}
closedir(dir);
printf("git commands available in '%s'\n", exec_path);
printf("----------------------------");
mput_char('-', strlen(exec_path));
putchar('\n');
pretty_print_string_list(cmdname, longest - 4);
putchar('\n');
}
static void list_common_cmds_help(void)
{
int i, longest = 0;
for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
if (longest < strlen(common_cmds[i].name))
longest = strlen(common_cmds[i].name);
}
puts("The most commonly used git commands are:");
for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
printf(" %s", common_cmds[i].name);
mput_char(' ', longest - strlen(common_cmds[i].name) + 4);
puts(common_cmds[i].help);
}
puts("(use 'git help -a' to get a list of all installed git commands)");
}
#ifdef __GNUC__
static void cmd_usage(int show_all, const char *exec_path, const char *fmt, ...)
__attribute__((__format__(__printf__, 3, 4), __noreturn__));
#endif
static void cmd_usage(int show_all, const char *exec_path, const char *fmt, ...)
{
if (fmt) {
va_list ap;
va_start(ap, fmt);
printf("git: ");
vprintf(fmt, ap);
va_end(ap);
putchar('\n');
}
else
puts(git_usage);
if (exec_path) {
putchar('\n');
if (show_all)
list_commands(exec_path, "git-*");
else
list_common_cmds_help();
}
exit(1);
}
static void prepend_to_path(const char *dir, int len)
{
char *path, *old_path = getenv("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 void show_man_page(const char *git_cmd)
{
const char *page;
if (!strncmp(git_cmd, "git", 3))
page = git_cmd;
else {
int page_len = strlen(git_cmd) + 4;
char *p = malloc(page_len + 1);
strcpy(p, "git-");
strcpy(p + 4, git_cmd);
p[page_len] = 0;
page = p;
}
execlp("man", "man", page, NULL);
}
static int cmd_version(int argc, const char **argv, char **envp)
{
printf("git version %s\n", GIT_VERSION);
return 0;
}
static int cmd_help(int argc, const char **argv, char **envp)
{
const char *help_cmd = argv[1];
if (!help_cmd)
cmd_usage(0, git_exec_path(), NULL);
else if (!strcmp(help_cmd, "--all") || !strcmp(help_cmd, "-a"))
cmd_usage(1, git_exec_path(), NULL);
else
show_man_page(help_cmd);
return 0;
}
#define LOGSIZE (65536)
static int cmd_log(int argc, const char **argv, char **envp)
{
struct rev_info rev;
struct commit *commit;
char *buf = xmalloc(LOGSIZE);
static enum cmit_fmt commit_format = CMIT_FMT_DEFAULT;
int abbrev = DEFAULT_ABBREV;
const char *commit_prefix = "commit ";
argc = setup_revisions(argc, argv, &rev, "HEAD");
while (1 < argc) {
const char *arg = argv[1];
if (!strncmp(arg, "--pretty", 8)) {
commit_format = get_commit_format(arg + 8);
if (commit_format == CMIT_FMT_ONELINE)
commit_prefix = "";
}
else if (!strcmp(arg, "--no-abbrev")) {
abbrev = 0;
}
else if (!strncmp(arg, "--abbrev=", 9)) {
abbrev = strtoul(arg + 9, NULL, 10);
if (abbrev && abbrev < MINIMUM_ABBREV)
abbrev = MINIMUM_ABBREV;
else if (40 < abbrev)
abbrev = 40;
}
else
die("unrecognized argument: %s", arg);
argc--; argv++;
}
prepare_revision_walk(&rev);
setup_pager();
while ((commit = get_revision(&rev)) != NULL) {
printf("%s%s", commit_prefix,
sha1_to_hex(commit->object.sha1));
if (rev.parents) {
struct commit_list *parents = commit->parents;
while (parents) {
struct object *o = &(parents->item->object);
parents = parents->next;
if (o->flags & TMP_MARK)
continue;
printf(" %s", sha1_to_hex(o->sha1));
o->flags |= TMP_MARK;
}
/* TMP_MARK is a general purpose flag that can
* be used locally, but the user should clean
* things up after it is done with them.
*/
for (parents = commit->parents;
parents;
parents = parents->next)
parents->item->object.flags &= ~TMP_MARK;
}
if (commit_format == CMIT_FMT_ONELINE)
putchar(' ');
else
putchar('\n');
pretty_print_commit(commit_format, commit, ~0, buf,
LOGSIZE, abbrev);
printf("%s\n", buf);
}
free(buf);
return 0;
}
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 **, char **);
} commands[] = {
{ "version", cmd_version },
{ "help", cmd_help },
{ "log", cmd_log },
};
int i;
for (i = 0; i < ARRAY_SIZE(commands); i++) {
struct cmd_struct *p = commands+i;
if (strcmp(p->cmd, cmd))
continue;
exit(p->fn(argc, argv, envp));
}
}
int main(int argc, const char **argv, char **envp)
{
const char *cmd = argv[0];
char *slash = strrchr(cmd, '/');
char git_command[PATH_MAX + 1];
const char *exec_path = NULL;
/*
* 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);
}
/* Default command: "help" */
cmd = "help";
/* Look for flags.. */
while (argc > 1) {
cmd = *++argv;
argc--;
if (strncmp(cmd, "--", 2))
break;
cmd += 2;
/*
* For legacy reasons, the "version" and "help"
* commands can be written with "--" prepended
* to make them look like flags.
*/
if (!strcmp(cmd, "help"))
break;
if (!strcmp(cmd, "version"))
break;
/*
* Check remaining flags (which by now must be
* "--exec-path", but maybe we will accept
* other arguments some day)
*/
if (!strncmp(cmd, "exec-path", 9)) {
cmd += 9;
if (*cmd == '=') {
git_set_exec_path(cmd + 1);
continue;
}
puts(git_exec_path());
exit(0);
}
cmd_usage(0, NULL, NULL);
}
argv[0] = cmd;
/*
* 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));
/* See if it's an internal command */
handle_internal_command(argc, argv, envp);
/* .. then try the external ones */
execv_git_cmd(argv);
if (errno == ENOENT)
cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
fprintf(stderr, "Failed to run command '%s': %s\n",
git_command, strerror(errno));
return 1;
}
Jump to Line
Something went wrong with that request. Please try again.