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Commit | Line | Data |
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8e49d503 | 1 | #include <stdio.h> |
7dbc2c04 JH |
2 | #include <sys/types.h> |
3 | #include <sys/stat.h> | |
4 | #include <dirent.h> | |
8e49d503 AE |
5 | #include <unistd.h> |
6 | #include <stdlib.h> | |
7 | #include <string.h> | |
8 | #include <errno.h> | |
9 | #include <limits.h> | |
10 | #include <stdarg.h> | |
4050c0df | 11 | #include "git-compat-util.h" |
77cb17e9 | 12 | #include "exec_cmd.h" |
2b11e317 | 13 | #include "cache.h" |
575ba9d6 | 14 | #include "quote.h" |
8e49d503 | 15 | |
70827b15 | 16 | #include "builtin.h" |
8e49d503 | 17 | |
822a7d50 RJ |
18 | const char git_usage_string[] = |
19 | "git [--version] [--exec-path[=GIT_EXEC_PATH]] [--help] COMMAND [ ARGS ]"; | |
20 | ||
8e49d503 AE |
21 | static void prepend_to_path(const char *dir, int len) |
22 | { | |
554fe20d TH |
23 | const char *old_path = getenv("PATH"); |
24 | char *path; | |
8e49d503 AE |
25 | int path_len = len; |
26 | ||
27 | if (!old_path) | |
7dbc2c04 | 28 | old_path = "/usr/local/bin:/usr/bin:/bin"; |
8e49d503 AE |
29 | |
30 | path_len = len + strlen(old_path) + 1; | |
31 | ||
32 | path = malloc(path_len + 1); | |
8e49d503 AE |
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 | ||
4ab243a9 JS |
41 | static int handle_options(const char*** argv, int* argc) |
42 | { | |
43 | int handled = 0; | |
44 | ||
45 | while (*argc > 0) { | |
46 | const char *cmd = (*argv)[0]; | |
47 | if (cmd[0] != '-') | |
48 | break; | |
49 | ||
6acbcb92 JS |
50 | /* |
51 | * For legacy reasons, the "version" and "help" | |
52 | * commands can be written with "--" prepended | |
53 | * to make them look like flags. | |
54 | */ | |
55 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version")) | |
56 | break; | |
57 | ||
58 | /* | |
59 | * Check remaining flags. | |
60 | */ | |
61 | if (!strncmp(cmd, "--exec-path", 11)) { | |
62 | cmd += 11; | |
63 | if (*cmd == '=') | |
64 | git_set_exec_path(cmd + 1); | |
65 | else { | |
66 | puts(git_exec_path()); | |
67 | exit(0); | |
68 | } | |
69 | } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { | |
4ab243a9 | 70 | setup_pager(); |
6acbcb92 JS |
71 | } else if (!strcmp(cmd, "--git-dir")) { |
72 | if (*argc < 1) | |
73 | return -1; | |
74 | setenv("GIT_DIR", (*argv)[1], 1); | |
75 | (*argv)++; | |
76 | (*argc)--; | |
77 | } else if (!strncmp(cmd, "--git-dir=", 10)) { | |
78 | setenv("GIT_DIR", cmd + 10, 1); | |
79 | } else if (!strcmp(cmd, "--bare")) { | |
80 | static char git_dir[1024]; | |
81 | setenv("GIT_DIR", getcwd(git_dir, 1024), 1); | |
82 | } else { | |
83 | fprintf(stderr, "Unknown option: %s\n", cmd); | |
822a7d50 | 84 | usage(git_usage_string); |
6acbcb92 | 85 | } |
4ab243a9 JS |
86 | |
87 | (*argv)++; | |
88 | (*argc)--; | |
89 | handled++; | |
90 | } | |
91 | return handled; | |
92 | } | |
93 | ||
2b11e317 | 94 | static const char *alias_command; |
96f1e58f | 95 | static char *alias_string; |
2b11e317 JS |
96 | |
97 | static int git_alias_config(const char *var, const char *value) | |
98 | { | |
99 | if (!strncmp(var, "alias.", 6) && !strcmp(var + 6, alias_command)) { | |
100 | alias_string = strdup(value); | |
101 | } | |
102 | return 0; | |
103 | } | |
104 | ||
105 | static int split_cmdline(char *cmdline, const char ***argv) | |
106 | { | |
107 | int src, dst, count = 0, size = 16; | |
108 | char quoted = 0; | |
109 | ||
110 | *argv = malloc(sizeof(char*) * size); | |
111 | ||
112 | /* split alias_string */ | |
113 | (*argv)[count++] = cmdline; | |
114 | for (src = dst = 0; cmdline[src];) { | |
115 | char c = cmdline[src]; | |
116 | if (!quoted && isspace(c)) { | |
117 | cmdline[dst++] = 0; | |
118 | while (cmdline[++src] | |
119 | && isspace(cmdline[src])) | |
120 | ; /* skip */ | |
121 | if (count >= size) { | |
122 | size += 16; | |
123 | *argv = realloc(*argv, sizeof(char*) * size); | |
124 | } | |
125 | (*argv)[count++] = cmdline + dst; | |
126 | } else if(!quoted && (c == '\'' || c == '"')) { | |
127 | quoted = c; | |
128 | src++; | |
129 | } else if (c == quoted) { | |
130 | quoted = 0; | |
131 | src++; | |
132 | } else { | |
133 | if (c == '\\' && quoted != '\'') { | |
134 | src++; | |
135 | c = cmdline[src]; | |
136 | if (!c) { | |
137 | free(*argv); | |
138 | *argv = NULL; | |
139 | return error("cmdline ends with \\"); | |
140 | } | |
141 | } | |
142 | cmdline[dst++] = c; | |
143 | src++; | |
144 | } | |
145 | } | |
146 | ||
147 | cmdline[dst] = 0; | |
148 | ||
149 | if (quoted) { | |
150 | free(*argv); | |
151 | *argv = NULL; | |
152 | return error("unclosed quote"); | |
153 | } | |
154 | ||
155 | return count; | |
156 | } | |
157 | ||
158 | static int handle_alias(int *argcp, const char ***argv) | |
159 | { | |
47e5c0ca | 160 | int nongit = 0, ret = 0, saved_errno = errno; |
2b11e317 | 161 | const char *subdir; |
0347a8c7 ML |
162 | int count, option_count; |
163 | const char** new_argv; | |
2b11e317 JS |
164 | |
165 | subdir = setup_git_directory_gently(&nongit); | |
0347a8c7 ML |
166 | |
167 | alias_command = (*argv)[0]; | |
168 | git_config(git_alias_config); | |
169 | if (alias_string) { | |
170 | count = split_cmdline(alias_string, &new_argv); | |
171 | option_count = handle_options(&new_argv, &count); | |
172 | memmove(new_argv - option_count, new_argv, | |
173 | count * sizeof(char *)); | |
174 | new_argv -= option_count; | |
175 | ||
176 | if (count < 1) | |
177 | die("empty alias for %s", alias_command); | |
178 | ||
179 | if (!strcmp(alias_command, new_argv[0])) | |
180 | die("recursive alias: %s", alias_command); | |
181 | ||
182 | if (getenv("GIT_TRACE")) { | |
183 | int i; | |
184 | fprintf(stderr, "trace: alias expansion: %s =>", | |
185 | alias_command); | |
186 | for (i = 0; i < count; ++i) { | |
187 | fputc(' ', stderr); | |
188 | sq_quote_print(stderr, new_argv[i]); | |
575ba9d6 | 189 | } |
0347a8c7 ML |
190 | fputc('\n', stderr); |
191 | fflush(stderr); | |
192 | } | |
575ba9d6 | 193 | |
0347a8c7 ML |
194 | new_argv = realloc(new_argv, sizeof(char*) * |
195 | (count + *argcp + 1)); | |
196 | /* insert after command name */ | |
197 | memcpy(new_argv + count, *argv + 1, sizeof(char*) * *argcp); | |
198 | new_argv[count+*argcp] = NULL; | |
2b11e317 | 199 | |
0347a8c7 ML |
200 | *argv = new_argv; |
201 | *argcp += count - 1; | |
2b11e317 | 202 | |
0347a8c7 | 203 | ret = 1; |
2b11e317 JS |
204 | } |
205 | ||
206 | if (subdir) | |
207 | chdir(subdir); | |
208 | ||
47e5c0ca JS |
209 | errno = saved_errno; |
210 | ||
2b11e317 JS |
211 | return ret; |
212 | } | |
213 | ||
70827b15 | 214 | const char git_version_string[] = GIT_VERSION; |
5b84f4d8 | 215 | |
efffea03 JH |
216 | #define RUN_SETUP (1<<0) |
217 | #define USE_PAGER (1<<1) | |
a633fca0 | 218 | |
9201c707 | 219 | static void handle_internal_command(int argc, const char **argv, char **envp) |
231af832 LT |
220 | { |
221 | const char *cmd = argv[0]; | |
222 | static struct cmd_struct { | |
223 | const char *cmd; | |
a633fca0 | 224 | int (*fn)(int, const char **, const char *); |
9590b041 | 225 | int option; |
231af832 | 226 | } commands[] = { |
efffea03 | 227 | { "add", cmd_add, RUN_SETUP }, |
f754fa9c | 228 | { "apply", cmd_apply }, |
efffea03 JH |
229 | { "cat-file", cmd_cat_file, RUN_SETUP }, |
230 | { "checkout-index", cmd_checkout_index, RUN_SETUP }, | |
0864f264 | 231 | { "check-ref-format", cmd_check_ref_format }, |
efffea03 | 232 | { "commit-tree", cmd_commit_tree, RUN_SETUP }, |
f754fa9c | 233 | { "count-objects", cmd_count_objects }, |
efffea03 JH |
234 | { "diff", cmd_diff, RUN_SETUP }, |
235 | { "diff-files", cmd_diff_files, RUN_SETUP }, | |
236 | { "diff-index", cmd_diff_index, RUN_SETUP }, | |
237 | { "diff-stages", cmd_diff_stages, RUN_SETUP }, | |
238 | { "diff-tree", cmd_diff_tree, RUN_SETUP }, | |
239 | { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP }, | |
240 | { "format-patch", cmd_format_patch, RUN_SETUP }, | |
f754fa9c | 241 | { "get-tar-commit-id", cmd_get_tar_commit_id }, |
efffea03 | 242 | { "grep", cmd_grep, RUN_SETUP }, |
f754fa9c JH |
243 | { "help", cmd_help }, |
244 | { "init-db", cmd_init_db }, | |
efffea03 JH |
245 | { "log", cmd_log, RUN_SETUP | USE_PAGER }, |
246 | { "ls-files", cmd_ls_files, RUN_SETUP }, | |
247 | { "ls-tree", cmd_ls_tree, RUN_SETUP }, | |
f754fa9c JH |
248 | { "mailinfo", cmd_mailinfo }, |
249 | { "mailsplit", cmd_mailsplit }, | |
efffea03 JH |
250 | { "mv", cmd_mv, RUN_SETUP }, |
251 | { "name-rev", cmd_name_rev, RUN_SETUP }, | |
252 | { "pack-objects", cmd_pack_objects, RUN_SETUP }, | |
253 | { "prune", cmd_prune, RUN_SETUP }, | |
254 | { "prune-packed", cmd_prune_packed, RUN_SETUP }, | |
102cb085 | 255 | { "push", cmd_push, RUN_SETUP }, |
efffea03 | 256 | { "read-tree", cmd_read_tree, RUN_SETUP }, |
f754fa9c | 257 | { "repo-config", cmd_repo_config }, |
efffea03 JH |
258 | { "rev-list", cmd_rev_list, RUN_SETUP }, |
259 | { "rev-parse", cmd_rev_parse, RUN_SETUP }, | |
260 | { "rm", cmd_rm, RUN_SETUP }, | |
261 | { "show-branch", cmd_show_branch, RUN_SETUP }, | |
262 | { "show", cmd_show, RUN_SETUP | USE_PAGER }, | |
f754fa9c | 263 | { "stripspace", cmd_stripspace }, |
efffea03 JH |
264 | { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP }, |
265 | { "tar-tree", cmd_tar_tree, RUN_SETUP }, | |
266 | { "unpack-objects", cmd_unpack_objects, RUN_SETUP }, | |
267 | { "update-index", cmd_update_index, RUN_SETUP }, | |
268 | { "update-ref", cmd_update_ref, RUN_SETUP }, | |
f754fa9c JH |
269 | { "upload-tar", cmd_upload_tar }, |
270 | { "version", cmd_version }, | |
efffea03 JH |
271 | { "whatchanged", cmd_whatchanged, RUN_SETUP | USE_PAGER }, |
272 | { "write-tree", cmd_write_tree, RUN_SETUP }, | |
2e3ed670 | 273 | { "verify-pack", cmd_verify_pack }, |
231af832 LT |
274 | }; |
275 | int i; | |
276 | ||
1cd95087 LT |
277 | /* Turn "git cmd --help" into "git help cmd" */ |
278 | if (argc > 1 && !strcmp(argv[1], "--help")) { | |
279 | argv[1] = argv[0]; | |
280 | argv[0] = cmd = "help"; | |
281 | } | |
282 | ||
231af832 LT |
283 | for (i = 0; i < ARRAY_SIZE(commands); i++) { |
284 | struct cmd_struct *p = commands+i; | |
a633fca0 | 285 | const char *prefix; |
231af832 LT |
286 | if (strcmp(p->cmd, cmd)) |
287 | continue; | |
575ba9d6 | 288 | |
a633fca0 | 289 | prefix = NULL; |
efffea03 | 290 | if (p->option & RUN_SETUP) |
a633fca0 | 291 | prefix = setup_git_directory(); |
9590b041 JH |
292 | if (p->option & USE_PAGER) |
293 | setup_pager(); | |
575ba9d6 ML |
294 | if (getenv("GIT_TRACE")) { |
295 | int i; | |
296 | fprintf(stderr, "trace: built-in: git"); | |
297 | for (i = 0; i < argc; ++i) { | |
298 | fputc(' ', stderr); | |
299 | sq_quote_print(stderr, argv[i]); | |
300 | } | |
301 | putc('\n', stderr); | |
302 | fflush(stderr); | |
303 | } | |
304 | ||
a633fca0 | 305 | exit(p->fn(argc, argv, prefix)); |
231af832 LT |
306 | } |
307 | } | |
308 | ||
9201c707 | 309 | int main(int argc, const char **argv, char **envp) |
8e49d503 | 310 | { |
9201c707 | 311 | const char *cmd = argv[0]; |
231af832 | 312 | char *slash = strrchr(cmd, '/'); |
231af832 | 313 | const char *exec_path = NULL; |
a025463b | 314 | int done_alias = 0; |
231af832 LT |
315 | |
316 | /* | |
317 | * Take the basename of argv[0] as the command | |
318 | * name, and the dirname as the default exec_path | |
319 | * if it's an absolute path and we don't have | |
320 | * anything better. | |
321 | */ | |
322 | if (slash) { | |
323 | *slash++ = 0; | |
324 | if (*cmd == '/') | |
325 | exec_path = cmd; | |
326 | cmd = slash; | |
327 | } | |
8e49d503 | 328 | |
231af832 LT |
329 | /* |
330 | * "git-xxxx" is the same as "git xxxx", but we obviously: | |
331 | * | |
332 | * - cannot take flags in between the "git" and the "xxxx". | |
333 | * - cannot execute it externally (since it would just do | |
334 | * the same thing over again) | |
335 | * | |
336 | * So we just directly call the internal command handler, and | |
337 | * die if that one cannot handle it. | |
338 | */ | |
339 | if (!strncmp(cmd, "git-", 4)) { | |
340 | cmd += 4; | |
341 | argv[0] = cmd; | |
342 | handle_internal_command(argc, argv, envp); | |
343 | die("cannot handle %s internally", cmd); | |
344 | } | |
8e49d503 | 345 | |
231af832 | 346 | /* Look for flags.. */ |
6acbcb92 JS |
347 | argv++; |
348 | argc--; | |
349 | handle_options(&argv, &argc); | |
350 | if (argc > 0) { | |
351 | if (!strncmp(argv[0], "--", 2)) | |
352 | argv[0] += 2; | |
353 | } else { | |
354 | /* Default command: "help" */ | |
355 | argv[0] = "help"; | |
356 | argc = 1; | |
97fc6c5f | 357 | } |
6acbcb92 | 358 | cmd = argv[0]; |
231af832 LT |
359 | |
360 | /* | |
361 | * We search for git commands in the following order: | |
362 | * - git_exec_path() | |
363 | * - the path of the "git" command if we could find it | |
364 | * in $0 | |
365 | * - the regular PATH. | |
366 | */ | |
367 | if (exec_path) | |
368 | prepend_to_path(exec_path, strlen(exec_path)); | |
77cb17e9 MO |
369 | exec_path = git_exec_path(); |
370 | prepend_to_path(exec_path, strlen(exec_path)); | |
8e49d503 | 371 | |
a025463b JH |
372 | while (1) { |
373 | /* See if it's an internal command */ | |
374 | handle_internal_command(argc, argv, envp); | |
2b11e317 | 375 | |
a025463b JH |
376 | /* .. then try the external ones */ |
377 | execv_git_cmd(argv); | |
231af832 | 378 | |
a025463b JH |
379 | /* It could be an alias -- this works around the insanity |
380 | * of overriding "git log" with "git show" by having | |
381 | * alias.log = show | |
382 | */ | |
383 | if (done_alias || !handle_alias(&argc, &argv)) | |
384 | break; | |
385 | done_alias = 1; | |
386 | } | |
10b15b86 AR |
387 | |
388 | if (errno == ENOENT) | |
822a7d50 | 389 | help_unknown_cmd(cmd); |
10b15b86 AR |
390 | |
391 | fprintf(stderr, "Failed to run command '%s': %s\n", | |
33ebb871 | 392 | cmd, strerror(errno)); |
8e49d503 AE |
393 | |
394 | return 1; | |
395 | } |