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Commit | Line | Data |
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85023577 | 1 | #include "builtin.h" |
77cb17e9 | 2 | #include "exec_cmd.h" |
2b11e317 | 3 | #include "cache.h" |
575ba9d6 | 4 | #include "quote.h" |
8e49d503 | 5 | |
822a7d50 | 6 | const char git_usage_string[] = |
281e67d6 | 7 | "git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate] [--bare] [--git-dir=GIT_DIR] [--help] COMMAND [ARGS]"; |
822a7d50 | 8 | |
8e49d503 AE |
9 | static void prepend_to_path(const char *dir, int len) |
10 | { | |
554fe20d TH |
11 | const char *old_path = getenv("PATH"); |
12 | char *path; | |
8e49d503 AE |
13 | int path_len = len; |
14 | ||
15 | if (!old_path) | |
7dbc2c04 | 16 | old_path = "/usr/local/bin:/usr/bin:/bin"; |
8e49d503 AE |
17 | |
18 | path_len = len + strlen(old_path) + 1; | |
19 | ||
2d7320d0 | 20 | path = xmalloc(path_len + 1); |
8e49d503 AE |
21 | |
22 | memcpy(path, dir, len); | |
23 | path[len] = ':'; | |
24 | memcpy(path + len + 1, old_path, path_len - len); | |
25 | ||
26 | setenv("PATH", path, 1); | |
0caea90b CC |
27 | |
28 | free(path); | |
8e49d503 AE |
29 | } |
30 | ||
4ab243a9 JS |
31 | static int handle_options(const char*** argv, int* argc) |
32 | { | |
33 | int handled = 0; | |
34 | ||
35 | while (*argc > 0) { | |
36 | const char *cmd = (*argv)[0]; | |
37 | if (cmd[0] != '-') | |
38 | break; | |
39 | ||
6acbcb92 JS |
40 | /* |
41 | * For legacy reasons, the "version" and "help" | |
42 | * commands can be written with "--" prepended | |
43 | * to make them look like flags. | |
44 | */ | |
45 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "--version")) | |
46 | break; | |
47 | ||
48 | /* | |
49 | * Check remaining flags. | |
50 | */ | |
51 | if (!strncmp(cmd, "--exec-path", 11)) { | |
52 | cmd += 11; | |
53 | if (*cmd == '=') | |
54 | git_set_exec_path(cmd + 1); | |
55 | else { | |
56 | puts(git_exec_path()); | |
57 | exit(0); | |
58 | } | |
59 | } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { | |
4ab243a9 | 60 | setup_pager(); |
6acbcb92 JS |
61 | } else if (!strcmp(cmd, "--git-dir")) { |
62 | if (*argc < 1) | |
63 | return -1; | |
64 | setenv("GIT_DIR", (*argv)[1], 1); | |
65 | (*argv)++; | |
66 | (*argc)--; | |
67 | } else if (!strncmp(cmd, "--git-dir=", 10)) { | |
68 | setenv("GIT_DIR", cmd + 10, 1); | |
69 | } else if (!strcmp(cmd, "--bare")) { | |
70 | static char git_dir[1024]; | |
71 | setenv("GIT_DIR", getcwd(git_dir, 1024), 1); | |
72 | } else { | |
73 | fprintf(stderr, "Unknown option: %s\n", cmd); | |
822a7d50 | 74 | usage(git_usage_string); |
6acbcb92 | 75 | } |
4ab243a9 JS |
76 | |
77 | (*argv)++; | |
78 | (*argc)--; | |
79 | handled++; | |
80 | } | |
81 | return handled; | |
82 | } | |
83 | ||
2b11e317 | 84 | static const char *alias_command; |
96f1e58f | 85 | static char *alias_string; |
2b11e317 JS |
86 | |
87 | static int git_alias_config(const char *var, const char *value) | |
88 | { | |
89 | if (!strncmp(var, "alias.", 6) && !strcmp(var + 6, alias_command)) { | |
9befac47 | 90 | alias_string = xstrdup(value); |
2b11e317 JS |
91 | } |
92 | return 0; | |
93 | } | |
94 | ||
95 | static int split_cmdline(char *cmdline, const char ***argv) | |
96 | { | |
97 | int src, dst, count = 0, size = 16; | |
98 | char quoted = 0; | |
99 | ||
100 | *argv = malloc(sizeof(char*) * size); | |
101 | ||
102 | /* split alias_string */ | |
103 | (*argv)[count++] = cmdline; | |
104 | for (src = dst = 0; cmdline[src];) { | |
105 | char c = cmdline[src]; | |
106 | if (!quoted && isspace(c)) { | |
107 | cmdline[dst++] = 0; | |
108 | while (cmdline[++src] | |
109 | && isspace(cmdline[src])) | |
110 | ; /* skip */ | |
111 | if (count >= size) { | |
112 | size += 16; | |
83572c1a | 113 | *argv = xrealloc(*argv, sizeof(char*) * size); |
2b11e317 JS |
114 | } |
115 | (*argv)[count++] = cmdline + dst; | |
116 | } else if(!quoted && (c == '\'' || c == '"')) { | |
117 | quoted = c; | |
118 | src++; | |
119 | } else if (c == quoted) { | |
120 | quoted = 0; | |
121 | src++; | |
122 | } else { | |
123 | if (c == '\\' && quoted != '\'') { | |
124 | src++; | |
125 | c = cmdline[src]; | |
126 | if (!c) { | |
127 | free(*argv); | |
128 | *argv = NULL; | |
129 | return error("cmdline ends with \\"); | |
130 | } | |
131 | } | |
132 | cmdline[dst++] = c; | |
133 | src++; | |
134 | } | |
135 | } | |
136 | ||
137 | cmdline[dst] = 0; | |
138 | ||
139 | if (quoted) { | |
140 | free(*argv); | |
141 | *argv = NULL; | |
142 | return error("unclosed quote"); | |
143 | } | |
144 | ||
145 | return count; | |
146 | } | |
147 | ||
148 | static int handle_alias(int *argcp, const char ***argv) | |
149 | { | |
47e5c0ca | 150 | int nongit = 0, ret = 0, saved_errno = errno; |
2b11e317 | 151 | const char *subdir; |
0347a8c7 ML |
152 | int count, option_count; |
153 | const char** new_argv; | |
2b11e317 JS |
154 | |
155 | subdir = setup_git_directory_gently(&nongit); | |
0347a8c7 ML |
156 | |
157 | alias_command = (*argv)[0]; | |
158 | git_config(git_alias_config); | |
159 | if (alias_string) { | |
160 | count = split_cmdline(alias_string, &new_argv); | |
161 | option_count = handle_options(&new_argv, &count); | |
162 | memmove(new_argv - option_count, new_argv, | |
163 | count * sizeof(char *)); | |
164 | new_argv -= option_count; | |
165 | ||
166 | if (count < 1) | |
167 | die("empty alias for %s", alias_command); | |
168 | ||
169 | if (!strcmp(alias_command, new_argv[0])) | |
170 | die("recursive alias: %s", alias_command); | |
171 | ||
6ce4e61f CC |
172 | trace_argv_printf(new_argv, count, |
173 | "trace: alias expansion: %s =>", | |
174 | alias_command); | |
575ba9d6 | 175 | |
83572c1a JF |
176 | new_argv = xrealloc(new_argv, sizeof(char*) * |
177 | (count + *argcp + 1)); | |
0347a8c7 ML |
178 | /* insert after command name */ |
179 | memcpy(new_argv + count, *argv + 1, sizeof(char*) * *argcp); | |
180 | new_argv[count+*argcp] = NULL; | |
2b11e317 | 181 | |
0347a8c7 ML |
182 | *argv = new_argv; |
183 | *argcp += count - 1; | |
2b11e317 | 184 | |
0347a8c7 | 185 | ret = 1; |
2b11e317 JS |
186 | } |
187 | ||
188 | if (subdir) | |
189 | chdir(subdir); | |
190 | ||
47e5c0ca JS |
191 | errno = saved_errno; |
192 | ||
2b11e317 JS |
193 | return ret; |
194 | } | |
195 | ||
70827b15 | 196 | const char git_version_string[] = GIT_VERSION; |
5b84f4d8 | 197 | |
efffea03 JH |
198 | #define RUN_SETUP (1<<0) |
199 | #define USE_PAGER (1<<1) | |
a633fca0 | 200 | |
9201c707 | 201 | static void handle_internal_command(int argc, const char **argv, char **envp) |
231af832 LT |
202 | { |
203 | const char *cmd = argv[0]; | |
204 | static struct cmd_struct { | |
205 | const char *cmd; | |
a633fca0 | 206 | int (*fn)(int, const char **, const char *); |
9590b041 | 207 | int option; |
231af832 | 208 | } commands[] = { |
efffea03 | 209 | { "add", cmd_add, RUN_SETUP }, |
f789e347 | 210 | { "annotate", cmd_annotate, }, |
f754fa9c | 211 | { "apply", cmd_apply }, |
4df096a5 | 212 | { "archive", cmd_archive }, |
acca687f | 213 | { "blame", cmd_blame, RUN_SETUP | USE_PAGER }, |
1da1b3a3 | 214 | { "branch", cmd_branch, RUN_SETUP }, |
efffea03 JH |
215 | { "cat-file", cmd_cat_file, RUN_SETUP }, |
216 | { "checkout-index", cmd_checkout_index, RUN_SETUP }, | |
0864f264 | 217 | { "check-ref-format", cmd_check_ref_format }, |
e827633a | 218 | { "cherry", cmd_cherry, RUN_SETUP }, |
efffea03 | 219 | { "commit-tree", cmd_commit_tree, RUN_SETUP }, |
8112894d | 220 | { "count-objects", cmd_count_objects, RUN_SETUP }, |
e88ee291 | 221 | { "diff", cmd_diff, RUN_SETUP | USE_PAGER }, |
efffea03 JH |
222 | { "diff-files", cmd_diff_files, RUN_SETUP }, |
223 | { "diff-index", cmd_diff_index, RUN_SETUP }, | |
224 | { "diff-stages", cmd_diff_stages, RUN_SETUP }, | |
225 | { "diff-tree", cmd_diff_tree, RUN_SETUP }, | |
226 | { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP }, | |
9f613ddd | 227 | { "for-each-ref", cmd_for_each_ref, RUN_SETUP }, |
efffea03 | 228 | { "format-patch", cmd_format_patch, RUN_SETUP }, |
f754fa9c | 229 | { "get-tar-commit-id", cmd_get_tar_commit_id }, |
efffea03 | 230 | { "grep", cmd_grep, RUN_SETUP }, |
f754fa9c JH |
231 | { "help", cmd_help }, |
232 | { "init-db", cmd_init_db }, | |
efffea03 JH |
233 | { "log", cmd_log, RUN_SETUP | USE_PAGER }, |
234 | { "ls-files", cmd_ls_files, RUN_SETUP }, | |
235 | { "ls-tree", cmd_ls_tree, RUN_SETUP }, | |
f754fa9c JH |
236 | { "mailinfo", cmd_mailinfo }, |
237 | { "mailsplit", cmd_mailsplit }, | |
ba1f5f35 | 238 | { "merge-file", cmd_merge_file }, |
efffea03 JH |
239 | { "mv", cmd_mv, RUN_SETUP }, |
240 | { "name-rev", cmd_name_rev, RUN_SETUP }, | |
241 | { "pack-objects", cmd_pack_objects, RUN_SETUP }, | |
acca687f | 242 | { "pickaxe", cmd_blame, RUN_SETUP | USE_PAGER }, |
efffea03 JH |
243 | { "prune", cmd_prune, RUN_SETUP }, |
244 | { "prune-packed", cmd_prune_packed, RUN_SETUP }, | |
102cb085 | 245 | { "push", cmd_push, RUN_SETUP }, |
efffea03 | 246 | { "read-tree", cmd_read_tree, RUN_SETUP }, |
f754fa9c | 247 | { "repo-config", cmd_repo_config }, |
658f3650 | 248 | { "rerere", cmd_rerere, RUN_SETUP }, |
efffea03 JH |
249 | { "rev-list", cmd_rev_list, RUN_SETUP }, |
250 | { "rev-parse", cmd_rev_parse, RUN_SETUP }, | |
251 | { "rm", cmd_rm, RUN_SETUP }, | |
c91f0d92 | 252 | { "runstatus", cmd_runstatus, RUN_SETUP }, |
1d541c12 | 253 | { "shortlog", cmd_shortlog, RUN_SETUP | USE_PAGER }, |
efffea03 JH |
254 | { "show-branch", cmd_show_branch, RUN_SETUP }, |
255 | { "show", cmd_show, RUN_SETUP | USE_PAGER }, | |
f754fa9c | 256 | { "stripspace", cmd_stripspace }, |
efffea03 | 257 | { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP }, |
9cb90b80 | 258 | { "tar-tree", cmd_tar_tree }, |
efffea03 JH |
259 | { "unpack-objects", cmd_unpack_objects, RUN_SETUP }, |
260 | { "update-index", cmd_update_index, RUN_SETUP }, | |
261 | { "update-ref", cmd_update_ref, RUN_SETUP }, | |
39345a21 | 262 | { "upload-archive", cmd_upload_archive }, |
f754fa9c | 263 | { "version", cmd_version }, |
efffea03 JH |
264 | { "whatchanged", cmd_whatchanged, RUN_SETUP | USE_PAGER }, |
265 | { "write-tree", cmd_write_tree, RUN_SETUP }, | |
2e3ed670 | 266 | { "verify-pack", cmd_verify_pack }, |
358ddb62 | 267 | { "show-ref", cmd_show_ref, RUN_SETUP }, |
e1e22e37 | 268 | { "pack-refs", cmd_pack_refs, RUN_SETUP }, |
231af832 LT |
269 | }; |
270 | int i; | |
271 | ||
1cd95087 LT |
272 | /* Turn "git cmd --help" into "git help cmd" */ |
273 | if (argc > 1 && !strcmp(argv[1], "--help")) { | |
274 | argv[1] = argv[0]; | |
275 | argv[0] = cmd = "help"; | |
276 | } | |
277 | ||
231af832 LT |
278 | for (i = 0; i < ARRAY_SIZE(commands); i++) { |
279 | struct cmd_struct *p = commands+i; | |
a633fca0 | 280 | const char *prefix; |
231af832 LT |
281 | if (strcmp(p->cmd, cmd)) |
282 | continue; | |
575ba9d6 | 283 | |
a633fca0 | 284 | prefix = NULL; |
efffea03 | 285 | if (p->option & RUN_SETUP) |
a633fca0 | 286 | prefix = setup_git_directory(); |
9590b041 JH |
287 | if (p->option & USE_PAGER) |
288 | setup_pager(); | |
6ce4e61f | 289 | trace_argv_printf(argv, argc, "trace: built-in: git"); |
575ba9d6 | 290 | |
a633fca0 | 291 | exit(p->fn(argc, argv, prefix)); |
231af832 LT |
292 | } |
293 | } | |
294 | ||
9201c707 | 295 | int main(int argc, const char **argv, char **envp) |
8e49d503 | 296 | { |
5b6df8e4 | 297 | const char *cmd = argv[0] ? argv[0] : "git-help"; |
231af832 | 298 | char *slash = strrchr(cmd, '/'); |
231af832 | 299 | const char *exec_path = NULL; |
a025463b | 300 | int done_alias = 0; |
231af832 LT |
301 | |
302 | /* | |
303 | * Take the basename of argv[0] as the command | |
304 | * name, and the dirname as the default exec_path | |
305 | * if it's an absolute path and we don't have | |
306 | * anything better. | |
307 | */ | |
308 | if (slash) { | |
309 | *slash++ = 0; | |
310 | if (*cmd == '/') | |
311 | exec_path = cmd; | |
312 | cmd = slash; | |
313 | } | |
8e49d503 | 314 | |
231af832 LT |
315 | /* |
316 | * "git-xxxx" is the same as "git xxxx", but we obviously: | |
317 | * | |
318 | * - cannot take flags in between the "git" and the "xxxx". | |
319 | * - cannot execute it externally (since it would just do | |
320 | * the same thing over again) | |
321 | * | |
322 | * So we just directly call the internal command handler, and | |
323 | * die if that one cannot handle it. | |
324 | */ | |
325 | if (!strncmp(cmd, "git-", 4)) { | |
326 | cmd += 4; | |
327 | argv[0] = cmd; | |
328 | handle_internal_command(argc, argv, envp); | |
329 | die("cannot handle %s internally", cmd); | |
330 | } | |
8e49d503 | 331 | |
231af832 | 332 | /* Look for flags.. */ |
6acbcb92 JS |
333 | argv++; |
334 | argc--; | |
335 | handle_options(&argv, &argc); | |
336 | if (argc > 0) { | |
337 | if (!strncmp(argv[0], "--", 2)) | |
338 | argv[0] += 2; | |
339 | } else { | |
340 | /* Default command: "help" */ | |
341 | argv[0] = "help"; | |
342 | argc = 1; | |
97fc6c5f | 343 | } |
6acbcb92 | 344 | cmd = argv[0]; |
231af832 LT |
345 | |
346 | /* | |
347 | * We search for git commands in the following order: | |
348 | * - git_exec_path() | |
349 | * - the path of the "git" command if we could find it | |
350 | * in $0 | |
351 | * - the regular PATH. | |
352 | */ | |
353 | if (exec_path) | |
354 | prepend_to_path(exec_path, strlen(exec_path)); | |
77cb17e9 MO |
355 | exec_path = git_exec_path(); |
356 | prepend_to_path(exec_path, strlen(exec_path)); | |
8e49d503 | 357 | |
a025463b JH |
358 | while (1) { |
359 | /* See if it's an internal command */ | |
360 | handle_internal_command(argc, argv, envp); | |
2b11e317 | 361 | |
a025463b JH |
362 | /* .. then try the external ones */ |
363 | execv_git_cmd(argv); | |
231af832 | 364 | |
a025463b JH |
365 | /* It could be an alias -- this works around the insanity |
366 | * of overriding "git log" with "git show" by having | |
367 | * alias.log = show | |
368 | */ | |
369 | if (done_alias || !handle_alias(&argc, &argv)) | |
370 | break; | |
371 | done_alias = 1; | |
372 | } | |
10b15b86 AR |
373 | |
374 | if (errno == ENOENT) | |
822a7d50 | 375 | help_unknown_cmd(cmd); |
10b15b86 AR |
376 | |
377 | fprintf(stderr, "Failed to run command '%s': %s\n", | |
33ebb871 | 378 | cmd, strerror(errno)); |
8e49d503 AE |
379 | |
380 | return 1; | |
381 | } |