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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 AE |
17 | |
18 | static void prepend_to_path(const char *dir, int len) | |
19 | { | |
554fe20d TH |
20 | const char *old_path = getenv("PATH"); |
21 | char *path; | |
8e49d503 AE |
22 | int path_len = len; |
23 | ||
24 | if (!old_path) | |
7dbc2c04 | 25 | old_path = "/usr/local/bin:/usr/bin:/bin"; |
8e49d503 AE |
26 | |
27 | path_len = len + strlen(old_path) + 1; | |
28 | ||
29 | path = malloc(path_len + 1); | |
8e49d503 AE |
30 | |
31 | memcpy(path, dir, len); | |
32 | path[len] = ':'; | |
33 | memcpy(path + len + 1, old_path, path_len - len); | |
34 | ||
35 | setenv("PATH", path, 1); | |
36 | } | |
37 | ||
2b11e317 JS |
38 | static const char *alias_command; |
39 | static char *alias_string = NULL; | |
40 | ||
41 | static int git_alias_config(const char *var, const char *value) | |
42 | { | |
43 | if (!strncmp(var, "alias.", 6) && !strcmp(var + 6, alias_command)) { | |
44 | alias_string = strdup(value); | |
45 | } | |
46 | return 0; | |
47 | } | |
48 | ||
49 | static int split_cmdline(char *cmdline, const char ***argv) | |
50 | { | |
51 | int src, dst, count = 0, size = 16; | |
52 | char quoted = 0; | |
53 | ||
54 | *argv = malloc(sizeof(char*) * size); | |
55 | ||
56 | /* split alias_string */ | |
57 | (*argv)[count++] = cmdline; | |
58 | for (src = dst = 0; cmdline[src];) { | |
59 | char c = cmdline[src]; | |
60 | if (!quoted && isspace(c)) { | |
61 | cmdline[dst++] = 0; | |
62 | while (cmdline[++src] | |
63 | && isspace(cmdline[src])) | |
64 | ; /* skip */ | |
65 | if (count >= size) { | |
66 | size += 16; | |
67 | *argv = realloc(*argv, sizeof(char*) * size); | |
68 | } | |
69 | (*argv)[count++] = cmdline + dst; | |
70 | } else if(!quoted && (c == '\'' || c == '"')) { | |
71 | quoted = c; | |
72 | src++; | |
73 | } else if (c == quoted) { | |
74 | quoted = 0; | |
75 | src++; | |
76 | } else { | |
77 | if (c == '\\' && quoted != '\'') { | |
78 | src++; | |
79 | c = cmdline[src]; | |
80 | if (!c) { | |
81 | free(*argv); | |
82 | *argv = NULL; | |
83 | return error("cmdline ends with \\"); | |
84 | } | |
85 | } | |
86 | cmdline[dst++] = c; | |
87 | src++; | |
88 | } | |
89 | } | |
90 | ||
91 | cmdline[dst] = 0; | |
92 | ||
93 | if (quoted) { | |
94 | free(*argv); | |
95 | *argv = NULL; | |
96 | return error("unclosed quote"); | |
97 | } | |
98 | ||
99 | return count; | |
100 | } | |
101 | ||
102 | static int handle_alias(int *argcp, const char ***argv) | |
103 | { | |
47e5c0ca | 104 | int nongit = 0, ret = 0, saved_errno = errno; |
2b11e317 JS |
105 | const char *subdir; |
106 | ||
107 | subdir = setup_git_directory_gently(&nongit); | |
108 | if (!nongit) { | |
109 | int count; | |
110 | const char** new_argv; | |
111 | ||
112 | alias_command = (*argv)[0]; | |
113 | git_config(git_alias_config); | |
114 | if (alias_string) { | |
115 | ||
116 | count = split_cmdline(alias_string, &new_argv); | |
117 | ||
118 | if (count < 1) | |
119 | die("empty alias for %s", alias_command); | |
120 | ||
121 | if (!strcmp(alias_command, new_argv[0])) | |
122 | die("recursive alias: %s", alias_command); | |
123 | ||
575ba9d6 ML |
124 | if (getenv("GIT_TRACE")) { |
125 | int i; | |
126 | fprintf(stderr, "trace: alias expansion: %s =>", | |
127 | alias_command); | |
128 | for (i = 0; i < count; ++i) { | |
129 | fputc(' ', stderr); | |
130 | sq_quote_print(stderr, new_argv[i]); | |
131 | } | |
132 | fputc('\n', stderr); | |
133 | fflush(stderr); | |
134 | } | |
135 | ||
d5b9e6cf ML |
136 | new_argv = realloc(new_argv, sizeof(char*) * |
137 | (count + *argcp + 1)); | |
2b11e317 | 138 | /* insert after command name */ |
d5b9e6cf ML |
139 | memcpy(new_argv + count, *argv + 1, |
140 | sizeof(char*) * *argcp); | |
141 | new_argv[count+*argcp] = NULL; | |
2b11e317 JS |
142 | |
143 | *argv = new_argv; | |
144 | *argcp += count - 1; | |
145 | ||
146 | ret = 1; | |
147 | } | |
148 | } | |
149 | ||
150 | if (subdir) | |
151 | chdir(subdir); | |
152 | ||
47e5c0ca JS |
153 | errno = saved_errno; |
154 | ||
2b11e317 JS |
155 | return ret; |
156 | } | |
157 | ||
70827b15 | 158 | const char git_version_string[] = GIT_VERSION; |
5b84f4d8 | 159 | |
9201c707 | 160 | static void handle_internal_command(int argc, const char **argv, char **envp) |
231af832 LT |
161 | { |
162 | const char *cmd = argv[0]; | |
163 | static struct cmd_struct { | |
164 | const char *cmd; | |
9201c707 | 165 | int (*fn)(int, const char **, char **); |
231af832 LT |
166 | } commands[] = { |
167 | { "version", cmd_version }, | |
168 | { "help", cmd_help }, | |
70b006b9 | 169 | { "log", cmd_log }, |
70827b15 | 170 | { "whatchanged", cmd_whatchanged }, |
ba1d4505 | 171 | { "show", cmd_show }, |
755225de | 172 | { "push", cmd_push }, |
68563738 | 173 | { "format-patch", cmd_format_patch }, |
c7432087 | 174 | { "count-objects", cmd_count_objects }, |
8ab99476 | 175 | { "diff", cmd_diff }, |
5010cb5f | 176 | { "grep", cmd_grep }, |
d9b814cc | 177 | { "rm", cmd_rm }, |
0d781539 | 178 | { "add", cmd_add }, |
5fb61b8d | 179 | { "rev-list", cmd_rev_list }, |
c3c8835f | 180 | { "init-db", cmd_init_db }, |
52ba03cb | 181 | { "get-tar-commit-id", cmd_get_tar_commit_id }, |
21754264 | 182 | { "upload-tar", cmd_upload_tar }, |
0864f264 | 183 | { "check-ref-format", cmd_check_ref_format }, |
aae01bda | 184 | { "ls-files", cmd_ls_files }, |
56d1398a | 185 | { "ls-tree", cmd_ls_tree }, |
d147e501 | 186 | { "tar-tree", cmd_tar_tree }, |
6d96ac18 | 187 | { "read-tree", cmd_read_tree }, |
ac6245e3 | 188 | { "commit-tree", cmd_commit_tree }, |
51ce34b9 | 189 | { "apply", cmd_apply }, |
e8cc9cd9 PE |
190 | { "show-branch", cmd_show_branch }, |
191 | { "diff-files", cmd_diff_files }, | |
192 | { "diff-index", cmd_diff_index }, | |
193 | { "diff-stages", cmd_diff_stages }, | |
f81daefe | 194 | { "diff-tree", cmd_diff_tree }, |
895f10c3 | 195 | { "cat-file", cmd_cat_file }, |
8ed05fb5 | 196 | { "rev-parse", cmd_rev_parse }, |
e690e843 | 197 | { "write-tree", cmd_write_tree }, |
34488e3c | 198 | { "mailsplit", cmd_mailsplit }, |
7499c996 | 199 | { "mailinfo", cmd_mailinfo }, |
fefe81c9 | 200 | { "stripspace", cmd_stripspace }, |
854b4629 | 201 | { "update-index", cmd_update_index }, |
00449f99 | 202 | { "update-ref", cmd_update_ref }, |
ba84a797 LT |
203 | { "fmt-merge-msg", cmd_fmt_merge_msg }, |
204 | { "prune", cmd_prune }, | |
11be42a4 | 205 | { "mv", cmd_mv }, |
231af832 LT |
206 | }; |
207 | int i; | |
208 | ||
1cd95087 LT |
209 | /* Turn "git cmd --help" into "git help cmd" */ |
210 | if (argc > 1 && !strcmp(argv[1], "--help")) { | |
211 | argv[1] = argv[0]; | |
212 | argv[0] = cmd = "help"; | |
213 | } | |
214 | ||
231af832 LT |
215 | for (i = 0; i < ARRAY_SIZE(commands); i++) { |
216 | struct cmd_struct *p = commands+i; | |
217 | if (strcmp(p->cmd, cmd)) | |
218 | continue; | |
575ba9d6 ML |
219 | |
220 | if (getenv("GIT_TRACE")) { | |
221 | int i; | |
222 | fprintf(stderr, "trace: built-in: git"); | |
223 | for (i = 0; i < argc; ++i) { | |
224 | fputc(' ', stderr); | |
225 | sq_quote_print(stderr, argv[i]); | |
226 | } | |
227 | putc('\n', stderr); | |
228 | fflush(stderr); | |
229 | } | |
230 | ||
231af832 LT |
231 | exit(p->fn(argc, argv, envp)); |
232 | } | |
233 | } | |
234 | ||
9201c707 | 235 | int main(int argc, const char **argv, char **envp) |
8e49d503 | 236 | { |
9201c707 | 237 | const char *cmd = argv[0]; |
231af832 | 238 | char *slash = strrchr(cmd, '/'); |
231af832 | 239 | const char *exec_path = NULL; |
a025463b | 240 | int done_alias = 0; |
231af832 LT |
241 | |
242 | /* | |
243 | * Take the basename of argv[0] as the command | |
244 | * name, and the dirname as the default exec_path | |
245 | * if it's an absolute path and we don't have | |
246 | * anything better. | |
247 | */ | |
248 | if (slash) { | |
249 | *slash++ = 0; | |
250 | if (*cmd == '/') | |
251 | exec_path = cmd; | |
252 | cmd = slash; | |
253 | } | |
8e49d503 | 254 | |
231af832 LT |
255 | /* |
256 | * "git-xxxx" is the same as "git xxxx", but we obviously: | |
257 | * | |
258 | * - cannot take flags in between the "git" and the "xxxx". | |
259 | * - cannot execute it externally (since it would just do | |
260 | * the same thing over again) | |
261 | * | |
262 | * So we just directly call the internal command handler, and | |
263 | * die if that one cannot handle it. | |
264 | */ | |
265 | if (!strncmp(cmd, "git-", 4)) { | |
266 | cmd += 4; | |
267 | argv[0] = cmd; | |
268 | handle_internal_command(argc, argv, envp); | |
269 | die("cannot handle %s internally", cmd); | |
270 | } | |
8e49d503 | 271 | |
231af832 LT |
272 | /* Default command: "help" */ |
273 | cmd = "help"; | |
8e49d503 | 274 | |
231af832 LT |
275 | /* Look for flags.. */ |
276 | while (argc > 1) { | |
277 | cmd = *++argv; | |
278 | argc--; | |
da6bf70e | 279 | |
85fb65ed JH |
280 | if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) { |
281 | setup_pager(); | |
282 | continue; | |
283 | } | |
284 | ||
231af832 | 285 | if (strncmp(cmd, "--", 2)) |
8e49d503 AE |
286 | break; |
287 | ||
231af832 LT |
288 | cmd += 2; |
289 | ||
290 | /* | |
291 | * For legacy reasons, the "version" and "help" | |
292 | * commands can be written with "--" prepended | |
293 | * to make them look like flags. | |
294 | */ | |
295 | if (!strcmp(cmd, "help")) | |
296 | break; | |
297 | if (!strcmp(cmd, "version")) | |
298 | break; | |
8e49d503 | 299 | |
231af832 LT |
300 | /* |
301 | * Check remaining flags (which by now must be | |
302 | * "--exec-path", but maybe we will accept | |
303 | * other arguments some day) | |
304 | */ | |
305 | if (!strncmp(cmd, "exec-path", 9)) { | |
306 | cmd += 9; | |
307 | if (*cmd == '=') { | |
308 | git_set_exec_path(cmd + 1); | |
309 | continue; | |
8e49d503 | 310 | } |
231af832 | 311 | puts(git_exec_path()); |
8e49d503 AE |
312 | exit(0); |
313 | } | |
a87cd02c | 314 | cmd_usage(0, NULL, NULL); |
97fc6c5f | 315 | } |
231af832 LT |
316 | argv[0] = cmd; |
317 | ||
318 | /* | |
319 | * We search for git commands in the following order: | |
320 | * - git_exec_path() | |
321 | * - the path of the "git" command if we could find it | |
322 | * in $0 | |
323 | * - the regular PATH. | |
324 | */ | |
325 | if (exec_path) | |
326 | prepend_to_path(exec_path, strlen(exec_path)); | |
77cb17e9 MO |
327 | exec_path = git_exec_path(); |
328 | prepend_to_path(exec_path, strlen(exec_path)); | |
8e49d503 | 329 | |
a025463b JH |
330 | while (1) { |
331 | /* See if it's an internal command */ | |
332 | handle_internal_command(argc, argv, envp); | |
2b11e317 | 333 | |
a025463b JH |
334 | /* .. then try the external ones */ |
335 | execv_git_cmd(argv); | |
231af832 | 336 | |
a025463b JH |
337 | /* It could be an alias -- this works around the insanity |
338 | * of overriding "git log" with "git show" by having | |
339 | * alias.log = show | |
340 | */ | |
341 | if (done_alias || !handle_alias(&argc, &argv)) | |
342 | break; | |
343 | done_alias = 1; | |
344 | } | |
10b15b86 AR |
345 | |
346 | if (errno == ENOENT) | |
a87cd02c | 347 | cmd_usage(0, exec_path, "'%s' is not a git-command", cmd); |
10b15b86 AR |
348 | |
349 | fprintf(stderr, "Failed to run command '%s': %s\n", | |
33ebb871 | 350 | cmd, strerror(errno)); |
8e49d503 AE |
351 | |
352 | return 1; | |
353 | } |