Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tag: v1.3.2
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 532 lines (462 sloc) 11.885 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531
#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 "diff.h"
#include "revision.h"
#include "log-tree.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;
int abbrev_commit = 0;
const char *commit_prefix = "commit ";
struct log_tree_opt opt;
int shown = 0;
int do_diff = 0;
int full_diff = 0;

init_log_tree_opt(&opt);
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 (!strcmp(arg, "--abbrev")) {
abbrev = DEFAULT_ABBREV;
}
else if (!strcmp(arg, "--abbrev-commit")) {
abbrev_commit = 1;
}
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 if (!strcmp(arg, "--full-diff")) {
do_diff = 1;
full_diff = 1;
}
else {
int cnt = log_tree_opt_parse(&opt, argv+1, argc-1);
if (0 < cnt) {
do_diff = 1;
argv += cnt;
argc -= cnt;
continue;
}
die("unrecognized argument: %s", arg);
}

argc--; argv++;
}

if (do_diff) {
opt.diffopt.abbrev = abbrev;
opt.verbose_header = 0;
opt.always_show_header = 0;
opt.no_commit_id = 1;
if (opt.combine_merges)
opt.ignore_merges = 0;
if (opt.dense_combined_merges)
opt.diffopt.output_format = DIFF_FORMAT_PATCH;
if (!full_diff && rev.prune_data)
diff_tree_setup_paths(rev.prune_data, &opt.diffopt);
diff_setup_done(&opt.diffopt);
}

prepare_revision_walk(&rev);
setup_pager();
while ((commit = get_revision(&rev)) != NULL) {
if (shown && do_diff && commit_format != CMIT_FMT_ONELINE)
putchar('\n');
fputs(commit_prefix, stdout);
if (abbrev_commit && abbrev)
fputs(find_unique_abbrev(commit->object.sha1, abbrev),
stdout);
else
fputs(sha1_to_hex(commit->object.sha1), stdout);
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);
if (do_diff) {
printf("---\n");
log_tree_commit(&opt, commit);
}
shown = 1;
free(commit->buffer);
commit->buffer = NULL;
}
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;

/* 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(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;
}
Something went wrong with that request. Please try again.