cvsserver: avoid warning about active db handles
[git/git.git] / git.c
CommitLineData
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
18static 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
38static const char *alias_command;
39static char *alias_string = NULL;
40
41static 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
49static 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
102static 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 158const char git_version_string[] = GIT_VERSION;
5b84f4d8 159
9201c707 160static 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 },
231af832
LT
205 };
206 int i;
207
1cd95087
LT
208 /* Turn "git cmd --help" into "git help cmd" */
209 if (argc > 1 && !strcmp(argv[1], "--help")) {
210 argv[1] = argv[0];
211 argv[0] = cmd = "help";
212 }
213
231af832
LT
214 for (i = 0; i < ARRAY_SIZE(commands); i++) {
215 struct cmd_struct *p = commands+i;
216 if (strcmp(p->cmd, cmd))
217 continue;
575ba9d6
ML
218
219 if (getenv("GIT_TRACE")) {
220 int i;
221 fprintf(stderr, "trace: built-in: git");
222 for (i = 0; i < argc; ++i) {
223 fputc(' ', stderr);
224 sq_quote_print(stderr, argv[i]);
225 }
226 putc('\n', stderr);
227 fflush(stderr);
228 }
229
231af832
LT
230 exit(p->fn(argc, argv, envp));
231 }
232}
233
9201c707 234int main(int argc, const char **argv, char **envp)
8e49d503 235{
9201c707 236 const char *cmd = argv[0];
231af832 237 char *slash = strrchr(cmd, '/');
231af832 238 const char *exec_path = NULL;
a025463b 239 int done_alias = 0;
231af832
LT
240
241 /*
242 * Take the basename of argv[0] as the command
243 * name, and the dirname as the default exec_path
244 * if it's an absolute path and we don't have
245 * anything better.
246 */
247 if (slash) {
248 *slash++ = 0;
249 if (*cmd == '/')
250 exec_path = cmd;
251 cmd = slash;
252 }
8e49d503 253
231af832
LT
254 /*
255 * "git-xxxx" is the same as "git xxxx", but we obviously:
256 *
257 * - cannot take flags in between the "git" and the "xxxx".
258 * - cannot execute it externally (since it would just do
259 * the same thing over again)
260 *
261 * So we just directly call the internal command handler, and
262 * die if that one cannot handle it.
263 */
264 if (!strncmp(cmd, "git-", 4)) {
265 cmd += 4;
266 argv[0] = cmd;
267 handle_internal_command(argc, argv, envp);
268 die("cannot handle %s internally", cmd);
269 }
8e49d503 270
231af832
LT
271 /* Default command: "help" */
272 cmd = "help";
8e49d503 273
231af832
LT
274 /* Look for flags.. */
275 while (argc > 1) {
276 cmd = *++argv;
277 argc--;
da6bf70e 278
85fb65ed
JH
279 if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
280 setup_pager();
281 continue;
282 }
283
231af832 284 if (strncmp(cmd, "--", 2))
8e49d503
AE
285 break;
286
231af832
LT
287 cmd += 2;
288
289 /*
290 * For legacy reasons, the "version" and "help"
291 * commands can be written with "--" prepended
292 * to make them look like flags.
293 */
294 if (!strcmp(cmd, "help"))
295 break;
296 if (!strcmp(cmd, "version"))
297 break;
8e49d503 298
231af832
LT
299 /*
300 * Check remaining flags (which by now must be
301 * "--exec-path", but maybe we will accept
302 * other arguments some day)
303 */
304 if (!strncmp(cmd, "exec-path", 9)) {
305 cmd += 9;
306 if (*cmd == '=') {
307 git_set_exec_path(cmd + 1);
308 continue;
8e49d503 309 }
231af832 310 puts(git_exec_path());
8e49d503
AE
311 exit(0);
312 }
a87cd02c 313 cmd_usage(0, NULL, NULL);
97fc6c5f 314 }
231af832
LT
315 argv[0] = cmd;
316
317 /*
318 * We search for git commands in the following order:
319 * - git_exec_path()
320 * - the path of the "git" command if we could find it
321 * in $0
322 * - the regular PATH.
323 */
324 if (exec_path)
325 prepend_to_path(exec_path, strlen(exec_path));
77cb17e9
MO
326 exec_path = git_exec_path();
327 prepend_to_path(exec_path, strlen(exec_path));
8e49d503 328
a025463b
JH
329 while (1) {
330 /* See if it's an internal command */
331 handle_internal_command(argc, argv, envp);
2b11e317 332
a025463b
JH
333 /* .. then try the external ones */
334 execv_git_cmd(argv);
231af832 335
a025463b
JH
336 /* It could be an alias -- this works around the insanity
337 * of overriding "git log" with "git show" by having
338 * alias.log = show
339 */
340 if (done_alias || !handle_alias(&argc, &argv))
341 break;
342 done_alias = 1;
343 }
10b15b86
AR
344
345 if (errno == ENOENT)
a87cd02c 346 cmd_usage(0, exec_path, "'%s' is not a git-command", cmd);
10b15b86
AR
347
348 fprintf(stderr, "Failed to run command '%s': %s\n",
33ebb871 349 cmd, strerror(errno));
8e49d503
AE
350
351 return 1;
352}