]>
Commit | Line | Data |
---|---|---|
1 | #include <stdio.h> | |
2 | #include <sys/types.h> | |
3 | #include <sys/stat.h> | |
4 | #include <dirent.h> | |
5 | #include <unistd.h> | |
6 | #include <stdlib.h> | |
7 | #include <string.h> | |
8 | #include <errno.h> | |
9 | #include <limits.h> | |
10 | #include <stdarg.h> | |
11 | #include "git-compat-util.h" | |
12 | #include "exec_cmd.h" | |
13 | #include "cache.h" | |
14 | #include "quote.h" | |
15 | ||
16 | #include "builtin.h" | |
17 | ||
18 | const char git_usage_string[] = | |
19 | "git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate] [--bare] [--git-dir=GIT_DIR] [--help] COMMAND [ARGS]"; | |
20 | ||
21 | static void prepend_to_path(const char *dir, int len) | |
22 | { | |
23 | const char *old_path = getenv("PATH"); | |
24 | char *path; | |
25 | int path_len = len; | |
26 | ||
27 | if (!old_path) | |
28 | old_path = "/usr/local/bin:/usr/bin:/bin"; | |
29 | ||
30 | path_len = len + strlen(old_path) + 1; | |
31 | ||
32 | path = xmalloc(path_len + 1); | |
33 | ||
34 | memcpy(path, dir, len); | |
35 | path[len] = ':'; | |
36 | memcpy(path + len + 1, old_path, path_len - len); | |
37 | ||
38 | setenv("PATH", path, 1); | |
39 | ||
40 | free(path); | |
41 | } | |
42 | ||
43 | static int handle_options(const char*** argv, int* argc) | |
44 | { | |
45 | int handled = 0; | |
46 | ||
47 | while (*argc > 0) { | |
48 | const char *cmd = (*argv)[0]; | |
49 | if (cmd[0] != '-') | |
50 | break; | |
51 | ||
52 | /* | |
53 | * For legacy reasons, the "version" and "help" | |
54 | * commands can be written with "--" prepended | |
55 | * to make them look like flags. | |
56 | */ | |
57 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version")) | |
58 | break; | |
59 | ||
60 | /* | |
61 | * Check remaining flags. | |
62 | */ | |
63 | if (!strncmp(cmd, "--exec-path", 11)) { | |
64 | cmd += 11; | |
65 | if (*cmd == '=') | |
66 | git_set_exec_path(cmd + 1); | |
67 | else { | |
68 | puts(git_exec_path()); | |
69 | exit(0); | |
70 | } | |
71 | } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { | |
72 | setup_pager(); | |
73 | } else if (!strcmp(cmd, "--git-dir")) { | |
74 | if (*argc < 1) | |
75 | return -1; | |
76 | setenv("GIT_DIR", (*argv)[1], 1); | |
77 | (*argv)++; | |
78 | (*argc)--; | |
79 | } else if (!strncmp(cmd, "--git-dir=", 10)) { | |
80 | setenv("GIT_DIR", cmd + 10, 1); | |
81 | } else if (!strcmp(cmd, "--bare")) { | |
82 | static char git_dir[1024]; | |
83 | setenv("GIT_DIR", getcwd(git_dir, 1024), 1); | |
84 | } else { | |
85 | fprintf(stderr, "Unknown option: %s\n", cmd); | |
86 | usage(git_usage_string); | |
87 | } | |
88 | ||
89 | (*argv)++; | |
90 | (*argc)--; | |
91 | handled++; | |
92 | } | |
93 | return handled; | |
94 | } | |
95 | ||
96 | static const char *alias_command; | |
97 | static char *alias_string; | |
98 | ||
99 | static int git_alias_config(const char *var, const char *value) | |
100 | { | |
101 | if (!strncmp(var, "alias.", 6) && !strcmp(var + 6, alias_command)) { | |
102 | alias_string = xstrdup(value); | |
103 | } | |
104 | return 0; | |
105 | } | |
106 | ||
107 | static int split_cmdline(char *cmdline, const char ***argv) | |
108 | { | |
109 | int src, dst, count = 0, size = 16; | |
110 | char quoted = 0; | |
111 | ||
112 | *argv = malloc(sizeof(char*) * size); | |
113 | ||
114 | /* split alias_string */ | |
115 | (*argv)[count++] = cmdline; | |
116 | for (src = dst = 0; cmdline[src];) { | |
117 | char c = cmdline[src]; | |
118 | if (!quoted && isspace(c)) { | |
119 | cmdline[dst++] = 0; | |
120 | while (cmdline[++src] | |
121 | && isspace(cmdline[src])) | |
122 | ; /* skip */ | |
123 | if (count >= size) { | |
124 | size += 16; | |
125 | *argv = xrealloc(*argv, sizeof(char*) * size); | |
126 | } | |
127 | (*argv)[count++] = cmdline + dst; | |
128 | } else if(!quoted && (c == '\'' || c == '"')) { | |
129 | quoted = c; | |
130 | src++; | |
131 | } else if (c == quoted) { | |
132 | quoted = 0; | |
133 | src++; | |
134 | } else { | |
135 | if (c == '\\' && quoted != '\'') { | |
136 | src++; | |
137 | c = cmdline[src]; | |
138 | if (!c) { | |
139 | free(*argv); | |
140 | *argv = NULL; | |
141 | return error("cmdline ends with \\"); | |
142 | } | |
143 | } | |
144 | cmdline[dst++] = c; | |
145 | src++; | |
146 | } | |
147 | } | |
148 | ||
149 | cmdline[dst] = 0; | |
150 | ||
151 | if (quoted) { | |
152 | free(*argv); | |
153 | *argv = NULL; | |
154 | return error("unclosed quote"); | |
155 | } | |
156 | ||
157 | return count; | |
158 | } | |
159 | ||
160 | static int handle_alias(int *argcp, const char ***argv) | |
161 | { | |
162 | int nongit = 0, ret = 0, saved_errno = errno; | |
163 | const char *subdir; | |
164 | int count, option_count; | |
165 | const char** new_argv; | |
166 | ||
167 | subdir = setup_git_directory_gently(&nongit); | |
168 | ||
169 | alias_command = (*argv)[0]; | |
170 | git_config(git_alias_config); | |
171 | if (alias_string) { | |
172 | count = split_cmdline(alias_string, &new_argv); | |
173 | option_count = handle_options(&new_argv, &count); | |
174 | memmove(new_argv - option_count, new_argv, | |
175 | count * sizeof(char *)); | |
176 | new_argv -= option_count; | |
177 | ||
178 | if (count < 1) | |
179 | die("empty alias for %s", alias_command); | |
180 | ||
181 | if (!strcmp(alias_command, new_argv[0])) | |
182 | die("recursive alias: %s", alias_command); | |
183 | ||
184 | trace_argv_printf(new_argv, count, | |
185 | "trace: alias expansion: %s =>", | |
186 | alias_command); | |
187 | ||
188 | new_argv = xrealloc(new_argv, sizeof(char*) * | |
189 | (count + *argcp + 1)); | |
190 | /* insert after command name */ | |
191 | memcpy(new_argv + count, *argv + 1, sizeof(char*) * *argcp); | |
192 | new_argv[count+*argcp] = NULL; | |
193 | ||
194 | *argv = new_argv; | |
195 | *argcp += count - 1; | |
196 | ||
197 | ret = 1; | |
198 | } | |
199 | ||
200 | if (subdir) | |
201 | chdir(subdir); | |
202 | ||
203 | errno = saved_errno; | |
204 | ||
205 | return ret; | |
206 | } | |
207 | ||
208 | const char git_version_string[] = GIT_VERSION; | |
209 | ||
210 | #define RUN_SETUP (1<<0) | |
211 | #define USE_PAGER (1<<1) | |
212 | ||
213 | static void handle_internal_command(int argc, const char **argv, char **envp) | |
214 | { | |
215 | const char *cmd = argv[0]; | |
216 | static struct cmd_struct { | |
217 | const char *cmd; | |
218 | int (*fn)(int, const char **, const char *); | |
219 | int option; | |
220 | } commands[] = { | |
221 | { "add", cmd_add, RUN_SETUP }, | |
222 | { "annotate", cmd_annotate, }, | |
223 | { "apply", cmd_apply }, | |
224 | { "archive", cmd_archive }, | |
225 | { "blame", cmd_blame, RUN_SETUP | USE_PAGER }, | |
226 | { "branch", cmd_branch, RUN_SETUP }, | |
227 | { "cat-file", cmd_cat_file, RUN_SETUP }, | |
228 | { "checkout-index", cmd_checkout_index, RUN_SETUP }, | |
229 | { "check-ref-format", cmd_check_ref_format }, | |
230 | { "cherry", cmd_cherry, RUN_SETUP }, | |
231 | { "commit-tree", cmd_commit_tree, RUN_SETUP }, | |
232 | { "count-objects", cmd_count_objects, RUN_SETUP }, | |
233 | { "diff", cmd_diff, RUN_SETUP | USE_PAGER }, | |
234 | { "diff-files", cmd_diff_files, RUN_SETUP }, | |
235 | { "diff-index", cmd_diff_index, RUN_SETUP }, | |
236 | { "diff-stages", cmd_diff_stages, RUN_SETUP }, | |
237 | { "diff-tree", cmd_diff_tree, RUN_SETUP }, | |
238 | { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP }, | |
239 | { "for-each-ref", cmd_for_each_ref, RUN_SETUP }, | |
240 | { "format-patch", cmd_format_patch, RUN_SETUP }, | |
241 | { "get-tar-commit-id", cmd_get_tar_commit_id }, | |
242 | { "grep", cmd_grep, RUN_SETUP }, | |
243 | { "help", cmd_help }, | |
244 | { "init-db", cmd_init_db }, | |
245 | { "log", cmd_log, RUN_SETUP | USE_PAGER }, | |
246 | { "ls-files", cmd_ls_files, RUN_SETUP }, | |
247 | { "ls-tree", cmd_ls_tree, RUN_SETUP }, | |
248 | { "mailinfo", cmd_mailinfo }, | |
249 | { "mailsplit", cmd_mailsplit }, | |
250 | { "mv", cmd_mv, RUN_SETUP }, | |
251 | { "name-rev", cmd_name_rev, RUN_SETUP }, | |
252 | { "pack-objects", cmd_pack_objects, RUN_SETUP }, | |
253 | { "pickaxe", cmd_blame, RUN_SETUP | USE_PAGER }, | |
254 | { "prune", cmd_prune, RUN_SETUP }, | |
255 | { "prune-packed", cmd_prune_packed, RUN_SETUP }, | |
256 | { "push", cmd_push, RUN_SETUP }, | |
257 | { "read-tree", cmd_read_tree, RUN_SETUP }, | |
258 | { "repo-config", cmd_repo_config }, | |
259 | { "rev-list", cmd_rev_list, RUN_SETUP }, | |
260 | { "rev-parse", cmd_rev_parse, RUN_SETUP }, | |
261 | { "rm", cmd_rm, RUN_SETUP }, | |
262 | { "runstatus", cmd_runstatus, RUN_SETUP }, | |
263 | { "shortlog", cmd_shortlog, RUN_SETUP | USE_PAGER }, | |
264 | { "show-branch", cmd_show_branch, RUN_SETUP }, | |
265 | { "show", cmd_show, RUN_SETUP | USE_PAGER }, | |
266 | { "stripspace", cmd_stripspace }, | |
267 | { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP }, | |
268 | { "tar-tree", cmd_tar_tree }, | |
269 | { "unpack-objects", cmd_unpack_objects, RUN_SETUP }, | |
270 | { "update-index", cmd_update_index, RUN_SETUP }, | |
271 | { "update-ref", cmd_update_ref, RUN_SETUP }, | |
272 | { "upload-archive", cmd_upload_archive }, | |
273 | { "version", cmd_version }, | |
274 | { "whatchanged", cmd_whatchanged, RUN_SETUP | USE_PAGER }, | |
275 | { "write-tree", cmd_write_tree, RUN_SETUP }, | |
276 | { "verify-pack", cmd_verify_pack }, | |
277 | { "show-ref", cmd_show_ref, RUN_SETUP }, | |
278 | { "pack-refs", cmd_pack_refs, RUN_SETUP }, | |
279 | }; | |
280 | int i; | |
281 | ||
282 | /* Turn "git cmd --help" into "git help cmd" */ | |
283 | if (argc > 1 && !strcmp(argv[1], "--help")) { | |
284 | argv[1] = argv[0]; | |
285 | argv[0] = cmd = "help"; | |
286 | } | |
287 | ||
288 | for (i = 0; i < ARRAY_SIZE(commands); i++) { | |
289 | struct cmd_struct *p = commands+i; | |
290 | const char *prefix; | |
291 | if (strcmp(p->cmd, cmd)) | |
292 | continue; | |
293 | ||
294 | prefix = NULL; | |
295 | if (p->option & RUN_SETUP) | |
296 | prefix = setup_git_directory(); | |
297 | if (p->option & USE_PAGER) | |
298 | setup_pager(); | |
299 | trace_argv_printf(argv, argc, "trace: built-in: git"); | |
300 | ||
301 | exit(p->fn(argc, argv, prefix)); | |
302 | } | |
303 | } | |
304 | ||
305 | int main(int argc, const char **argv, char **envp) | |
306 | { | |
307 | const char *cmd = argv[0] ? argv[0] : "git-help"; | |
308 | char *slash = strrchr(cmd, '/'); | |
309 | const char *exec_path = NULL; | |
310 | int done_alias = 0; | |
311 | ||
312 | /* | |
313 | * Take the basename of argv[0] as the command | |
314 | * name, and the dirname as the default exec_path | |
315 | * if it's an absolute path and we don't have | |
316 | * anything better. | |
317 | */ | |
318 | if (slash) { | |
319 | *slash++ = 0; | |
320 | if (*cmd == '/') | |
321 | exec_path = cmd; | |
322 | cmd = slash; | |
323 | } | |
324 | ||
325 | /* | |
326 | * "git-xxxx" is the same as "git xxxx", but we obviously: | |
327 | * | |
328 | * - cannot take flags in between the "git" and the "xxxx". | |
329 | * - cannot execute it externally (since it would just do | |
330 | * the same thing over again) | |
331 | * | |
332 | * So we just directly call the internal command handler, and | |
333 | * die if that one cannot handle it. | |
334 | */ | |
335 | if (!strncmp(cmd, "git-", 4)) { | |
336 | cmd += 4; | |
337 | argv[0] = cmd; | |
338 | handle_internal_command(argc, argv, envp); | |
339 | die("cannot handle %s internally", cmd); | |
340 | } | |
341 | ||
342 | /* Look for flags.. */ | |
343 | argv++; | |
344 | argc--; | |
345 | handle_options(&argv, &argc); | |
346 | if (argc > 0) { | |
347 | if (!strncmp(argv[0], "--", 2)) | |
348 | argv[0] += 2; | |
349 | } else { | |
350 | /* Default command: "help" */ | |
351 | argv[0] = "help"; | |
352 | argc = 1; | |
353 | } | |
354 | cmd = argv[0]; | |
355 | ||
356 | /* | |
357 | * We search for git commands in the following order: | |
358 | * - git_exec_path() | |
359 | * - the path of the "git" command if we could find it | |
360 | * in $0 | |
361 | * - the regular PATH. | |
362 | */ | |
363 | if (exec_path) | |
364 | prepend_to_path(exec_path, strlen(exec_path)); | |
365 | exec_path = git_exec_path(); | |
366 | prepend_to_path(exec_path, strlen(exec_path)); | |
367 | ||
368 | while (1) { | |
369 | /* See if it's an internal command */ | |
370 | handle_internal_command(argc, argv, envp); | |
371 | ||
372 | /* .. then try the external ones */ | |
373 | execv_git_cmd(argv); | |
374 | ||
375 | /* It could be an alias -- this works around the insanity | |
376 | * of overriding "git log" with "git show" by having | |
377 | * alias.log = show | |
378 | */ | |
379 | if (done_alias || !handle_alias(&argc, &argv)) | |
380 | break; | |
381 | done_alias = 1; | |
382 | } | |
383 | ||
384 | if (errno == ENOENT) | |
385 | help_unknown_cmd(cmd); | |
386 | ||
387 | fprintf(stderr, "Failed to run command '%s': %s\n", | |
388 | cmd, strerror(errno)); | |
389 | ||
390 | return 1; | |
391 | } |