11 #include <sys/ioctl.h>
12 #include "git-compat-util.h"
14 #include "common-cmds.h"
21 # define PATH_MAX 4096
24 static const char git_usage[] =
25 "Usage: git [--version] [--exec-path[=GIT_EXEC_PATH]] [--help] COMMAND [ ARGS ]";
27 /* most gui terms set COLUMNS (although some don't export it) */
28 static int term_columns(void)
30 char *col_string = getenv("COLUMNS");
33 if (col_string && (n_cols = atoi(col_string)) > 0)
39 if (!ioctl(1, TIOCGWINSZ, &ws)) {
51 fprintf(stderr, "git: out of memory\n");
55 static inline void mput_char(char c, unsigned int num)
61 static struct cmdname {
65 static int cmdname_alloc, cmdname_cnt;
67 static void add_cmdname(const char *name, int len)
70 if (cmdname_alloc <= cmdname_cnt) {
71 cmdname_alloc = cmdname_alloc + 200;
72 cmdname = realloc(cmdname, cmdname_alloc * sizeof(*cmdname));
76 ent = malloc(sizeof(*ent) + len);
80 memcpy(ent->name, name, len);
82 cmdname[cmdname_cnt++] = ent;
85 static int cmdname_compare(const void *a_, const void *b_)
87 struct cmdname *a = *(struct cmdname **)a_;
88 struct cmdname *b = *(struct cmdname **)b_;
89 return strcmp(a->name, b->name);
92 static void pretty_print_string_list(struct cmdname **cmdname, int longest)
95 int space = longest + 1; /* min 1 SP between words */
96 int max_cols = term_columns() - 1; /* don't print *on* the edge */
100 cols = max_cols / space;
101 rows = (cmdname_cnt + cols - 1) / cols;
103 qsort(cmdname, cmdname_cnt, sizeof(*cmdname), cmdname_compare);
105 for (i = 0; i < rows; i++) {
108 for (j = 0; j < cols; j++) {
109 int n = j * rows + i;
111 if (n >= cmdname_cnt)
113 if (j == cols-1 || n + rows >= cmdname_cnt)
115 printf("%-*s", size, cmdname[n]->name);
121 static void list_commands(const char *exec_path, const char *pattern)
123 unsigned int longest = 0;
126 DIR *dir = opendir(exec_path);
130 fprintf(stderr, "git: '%s': %s\n", exec_path, strerror(errno));
134 dirlen = strlen(exec_path);
135 if (PATH_MAX - 20 < dirlen) {
136 fprintf(stderr, "git: insanely long exec-path '%s'\n",
141 memcpy(path, exec_path, dirlen);
142 path[dirlen++] = '/';
144 while ((de = readdir(dir)) != NULL) {
148 if (strncmp(de->d_name, "git-", 4))
150 strcpy(path+dirlen, de->d_name);
151 if (stat(path, &st) || /* stat, not lstat */
152 !S_ISREG(st.st_mode) ||
153 !(st.st_mode & S_IXUSR))
156 entlen = strlen(de->d_name);
157 if (4 < entlen && !strcmp(de->d_name + entlen - 4, ".exe"))
160 if (longest < entlen)
163 add_cmdname(de->d_name + 4, entlen-4);
167 printf("git commands available in '%s'\n", exec_path);
168 printf("----------------------------");
169 mput_char('-', strlen(exec_path));
171 pretty_print_string_list(cmdname, longest - 4);
175 static void list_common_cmds_help(void)
179 for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
180 if (longest < strlen(common_cmds[i].name))
181 longest = strlen(common_cmds[i].name);
184 puts("The most commonly used git commands are:");
185 for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
186 printf(" %s", common_cmds[i].name);
187 mput_char(' ', longest - strlen(common_cmds[i].name) + 4);
188 puts(common_cmds[i].help);
190 puts("(use 'git help -a' to get a list of all installed git commands)");
194 static void cmd_usage(int show_all, const char *exec_path, const char *fmt, ...)
195 __attribute__((__format__(__printf__, 3, 4), __noreturn__));
197 static void cmd_usage(int show_all, const char *exec_path, const char *fmt, ...)
214 list_commands(exec_path, "git-*");
216 list_common_cmds_help();
222 static void prepend_to_path(const char *dir, int len)
224 char *path, *old_path = getenv("PATH");
228 old_path = "/usr/local/bin:/usr/bin:/bin";
230 path_len = len + strlen(old_path) + 1;
232 path = malloc(path_len + 1);
234 memcpy(path, dir, len);
236 memcpy(path + len + 1, old_path, path_len - len);
238 setenv("PATH", path, 1);
241 static void show_man_page(const char *git_cmd)
245 if (!strncmp(git_cmd, "git", 3))
248 int page_len = strlen(git_cmd) + 4;
249 char *p = malloc(page_len + 1);
251 strcpy(p + 4, git_cmd);
256 execlp("man", "man", page, NULL);
259 static int cmd_version(int argc, const char **argv, char **envp)
261 printf("git version %s\n", GIT_VERSION);
265 static int cmd_help(int argc, const char **argv, char **envp)
267 const char *help_cmd = argv[1];
269 cmd_usage(0, git_exec_path(), NULL);
270 else if (!strcmp(help_cmd, "--all") || !strcmp(help_cmd, "-a"))
271 cmd_usage(1, git_exec_path(), NULL);
273 show_man_page(help_cmd);
277 #define LOGSIZE (65536)
279 static int cmd_log(int argc, const char **argv, char **envp)
282 struct commit *commit;
283 char *buf = xmalloc(LOGSIZE);
284 static enum cmit_fmt commit_format = CMIT_FMT_DEFAULT;
285 int abbrev = DEFAULT_ABBREV;
286 int abbrev_commit = 0;
287 const char *commit_prefix = "commit ";
289 argc = setup_revisions(argc, argv, &rev, "HEAD");
291 const char *arg = argv[1];
292 if (!strncmp(arg, "--pretty", 8)) {
293 commit_format = get_commit_format(arg + 8);
294 if (commit_format == CMIT_FMT_ONELINE)
297 else if (!strcmp(arg, "--no-abbrev")) {
300 else if (!strcmp(arg, "--abbrev")) {
301 abbrev = DEFAULT_ABBREV;
303 else if (!strcmp(arg, "--abbrev-commit")) {
306 else if (!strncmp(arg, "--abbrev=", 9)) {
307 abbrev = strtoul(arg + 9, NULL, 10);
308 if (abbrev && abbrev < MINIMUM_ABBREV)
309 abbrev = MINIMUM_ABBREV;
310 else if (40 < abbrev)
314 die("unrecognized argument: %s", arg);
318 prepare_revision_walk(&rev);
320 while ((commit = get_revision(&rev)) != NULL) {
321 fputs(commit_prefix, stdout);
322 if (abbrev_commit && abbrev)
323 fputs(find_unique_abbrev(commit->object.sha1, abbrev),
326 fputs(sha1_to_hex(commit->object.sha1), stdout);
328 struct commit_list *parents = commit->parents;
330 struct object *o = &(parents->item->object);
331 parents = parents->next;
332 if (o->flags & TMP_MARK)
334 printf(" %s", sha1_to_hex(o->sha1));
335 o->flags |= TMP_MARK;
337 /* TMP_MARK is a general purpose flag that can
338 * be used locally, but the user should clean
339 * things up after it is done with them.
341 for (parents = commit->parents;
343 parents = parents->next)
344 parents->item->object.flags &= ~TMP_MARK;
346 if (commit_format == CMIT_FMT_ONELINE)
350 pretty_print_commit(commit_format, commit, ~0, buf,
358 static void handle_internal_command(int argc, const char **argv, char **envp)
360 const char *cmd = argv[0];
361 static struct cmd_struct {
363 int (*fn)(int, const char **, char **);
365 { "version", cmd_version },
366 { "help", cmd_help },
371 for (i = 0; i < ARRAY_SIZE(commands); i++) {
372 struct cmd_struct *p = commands+i;
373 if (strcmp(p->cmd, cmd))
375 exit(p->fn(argc, argv, envp));
379 int main(int argc, const char **argv, char **envp)
381 const char *cmd = argv[0];
382 char *slash = strrchr(cmd, '/');
383 char git_command[PATH_MAX + 1];
384 const char *exec_path = NULL;
387 * Take the basename of argv[0] as the command
388 * name, and the dirname as the default exec_path
389 * if it's an absolute path and we don't have
400 * "git-xxxx" is the same as "git xxxx", but we obviously:
402 * - cannot take flags in between the "git" and the "xxxx".
403 * - cannot execute it externally (since it would just do
404 * the same thing over again)
406 * So we just directly call the internal command handler, and
407 * die if that one cannot handle it.
409 if (!strncmp(cmd, "git-", 4)) {
412 handle_internal_command(argc, argv, envp);
413 die("cannot handle %s internally", cmd);
416 /* Default command: "help" */
419 /* Look for flags.. */
424 if (strncmp(cmd, "--", 2))
430 * For legacy reasons, the "version" and "help"
431 * commands can be written with "--" prepended
432 * to make them look like flags.
434 if (!strcmp(cmd, "help"))
436 if (!strcmp(cmd, "version"))
440 * Check remaining flags (which by now must be
441 * "--exec-path", but maybe we will accept
442 * other arguments some day)
444 if (!strncmp(cmd, "exec-path", 9)) {
447 git_set_exec_path(cmd + 1);
450 puts(git_exec_path());
453 cmd_usage(0, NULL, NULL);
458 * We search for git commands in the following order:
460 * - the path of the "git" command if we could find it
462 * - the regular PATH.
465 prepend_to_path(exec_path, strlen(exec_path));
466 exec_path = git_exec_path();
467 prepend_to_path(exec_path, strlen(exec_path));
469 /* See if it's an internal command */
470 handle_internal_command(argc, argv, envp);
472 /* .. then try the external ones */
476 cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
478 fprintf(stderr, "Failed to run command '%s': %s\n",
479 git_command, strerror(errno));