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Commit | Line | Data |
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70827b15 LT |
1 | #include "cache.h" |
2 | #include "builtin.h" | |
3 | #include "exec_cmd.h" | |
8af84dad | 4 | #include "levenshtein.h" |
940208a7 | 5 | #include "help.h" |
6612b9e4 | 6 | #include "common-cmds.h" |
dbfae689 NTND |
7 | #include "string-list.h" |
8 | #include "column.h" | |
816fb46b | 9 | #include "version.h" |
e5618106 | 10 | #include "refs.h" |
64949984 | 11 | |
940208a7 | 12 | void add_cmdname(struct cmdnames *cmds, const char *name, int len) |
70827b15 | 13 | { |
940208a7 | 14 | struct cmdname *ent = xmalloc(sizeof(*ent) + len + 1); |
1eb05690 | 15 | |
70827b15 LT |
16 | ent->len = len; |
17 | memcpy(ent->name, name, len); | |
18 | ent->name[len] = 0; | |
1eb05690 SP |
19 | |
20 | ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc); | |
21 | cmds->names[cmds->cnt++] = ent; | |
70827b15 LT |
22 | } |
23 | ||
8af84dad JS |
24 | static void clean_cmdnames(struct cmdnames *cmds) |
25 | { | |
26 | int i; | |
27 | for (i = 0; i < cmds->cnt; ++i) | |
28 | free(cmds->names[i]); | |
29 | free(cmds->names); | |
30 | cmds->cnt = 0; | |
31 | cmds->alloc = 0; | |
32 | } | |
33 | ||
70827b15 LT |
34 | static int cmdname_compare(const void *a_, const void *b_) |
35 | { | |
36 | struct cmdname *a = *(struct cmdname **)a_; | |
37 | struct cmdname *b = *(struct cmdname **)b_; | |
38 | return strcmp(a->name, b->name); | |
39 | } | |
40 | ||
1eb05690 SP |
41 | static void uniq(struct cmdnames *cmds) |
42 | { | |
43 | int i, j; | |
44 | ||
45 | if (!cmds->cnt) | |
46 | return; | |
47 | ||
4a15758f JK |
48 | for (i = j = 1; i < cmds->cnt; i++) { |
49 | if (!strcmp(cmds->names[i]->name, cmds->names[j-1]->name)) | |
50 | free(cmds->names[i]); | |
51 | else | |
1eb05690 | 52 | cmds->names[j++] = cmds->names[i]; |
4a15758f | 53 | } |
1eb05690 SP |
54 | |
55 | cmds->cnt = j; | |
56 | } | |
57 | ||
940208a7 | 58 | void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes) |
f3fa1838 | 59 | { |
1eb05690 SP |
60 | int ci, cj, ei; |
61 | int cmp; | |
62 | ||
63 | ci = cj = ei = 0; | |
64 | while (ci < cmds->cnt && ei < excludes->cnt) { | |
65 | cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name); | |
66 | if (cmp < 0) | |
67 | cmds->names[cj++] = cmds->names[ci++]; | |
6a17f583 JH |
68 | else if (cmp == 0) { |
69 | ei++; | |
70 | free(cmds->names[ci++]); | |
71 | } else if (cmp > 0) | |
1eb05690 SP |
72 | ei++; |
73 | } | |
74 | ||
75 | while (ci < cmds->cnt) | |
76 | cmds->names[cj++] = cmds->names[ci++]; | |
77 | ||
78 | cmds->cnt = cj; | |
79 | } | |
80 | ||
dbfae689 NTND |
81 | static void pretty_print_string_list(struct cmdnames *cmds, |
82 | unsigned int colopts) | |
70827b15 | 83 | { |
dbfae689 NTND |
84 | struct string_list list = STRING_LIST_INIT_NODUP; |
85 | struct column_options copts; | |
86 | int i; | |
70827b15 | 87 | |
dbfae689 NTND |
88 | for (i = 0; i < cmds->cnt; i++) |
89 | string_list_append(&list, cmds->names[i]->name); | |
90 | /* | |
91 | * always enable column display, we only consult column.* | |
92 | * about layout strategy and stuff | |
93 | */ | |
94 | colopts = (colopts & ~COL_ENABLE_MASK) | COL_ENABLED; | |
95 | memset(&copts, 0, sizeof(copts)); | |
96 | copts.indent = " "; | |
97 | copts.padding = 2; | |
98 | print_columns(&list, colopts, &copts); | |
99 | string_list_clear(&list, 0); | |
70827b15 LT |
100 | } |
101 | ||
cc3b7a97 JS |
102 | static int is_executable(const char *name) |
103 | { | |
104 | struct stat st; | |
105 | ||
106 | if (stat(name, &st) || /* stat, not lstat */ | |
107 | !S_ISREG(st.st_mode)) | |
108 | return 0; | |
109 | ||
b8a97333 RJ |
110 | #if defined(WIN32) || defined(__CYGWIN__) |
111 | #if defined(__CYGWIN__) | |
112 | if ((st.st_mode & S_IXUSR) == 0) | |
113 | #endif | |
0d30ad71 | 114 | { /* cannot trust the executable bit, peek into the file instead */ |
cc3b7a97 JS |
115 | char buf[3] = { 0 }; |
116 | int n; | |
117 | int fd = open(name, O_RDONLY); | |
118 | st.st_mode &= ~S_IXUSR; | |
119 | if (fd >= 0) { | |
120 | n = read(fd, buf, 2); | |
121 | if (n == 2) | |
122 | /* DOS executables start with "MZ" */ | |
123 | if (!strcmp(buf, "#!") || !strcmp(buf, "MZ")) | |
124 | st.st_mode |= S_IXUSR; | |
125 | close(fd); | |
126 | } | |
0d30ad71 | 127 | } |
cc3b7a97 JS |
128 | #endif |
129 | return st.st_mode & S_IXUSR; | |
130 | } | |
131 | ||
e321180e | 132 | static void list_commands_in_dir(struct cmdnames *cmds, |
940208a7 MV |
133 | const char *path, |
134 | const char *prefix) | |
70827b15 | 135 | { |
940208a7 | 136 | int prefix_len; |
1eb05690 | 137 | DIR *dir = opendir(path); |
70827b15 | 138 | struct dirent *de; |
f5d600e2 JS |
139 | struct strbuf buf = STRBUF_INIT; |
140 | int len; | |
70827b15 | 141 | |
f5d600e2 | 142 | if (!dir) |
e321180e | 143 | return; |
940208a7 MV |
144 | if (!prefix) |
145 | prefix = "git-"; | |
146 | prefix_len = strlen(prefix); | |
70827b15 | 147 | |
f5d600e2 JS |
148 | strbuf_addf(&buf, "%s/", path); |
149 | len = buf.len; | |
150 | ||
70827b15 | 151 | while ((de = readdir(dir)) != NULL) { |
70827b15 LT |
152 | int entlen; |
153 | ||
edb6ddc5 | 154 | if (prefixcmp(de->d_name, prefix)) |
70827b15 | 155 | continue; |
0966003c | 156 | |
f5d600e2 JS |
157 | strbuf_setlen(&buf, len); |
158 | strbuf_addstr(&buf, de->d_name); | |
159 | if (!is_executable(buf.buf)) | |
70827b15 LT |
160 | continue; |
161 | ||
edb6ddc5 | 162 | entlen = strlen(de->d_name) - prefix_len; |
5bb1cda5 | 163 | if (has_extension(de->d_name, ".exe")) |
70827b15 LT |
164 | entlen -= 4; |
165 | ||
1eb05690 | 166 | add_cmdname(cmds, de->d_name + prefix_len, entlen); |
70827b15 LT |
167 | } |
168 | closedir(dir); | |
f5d600e2 | 169 | strbuf_release(&buf); |
1eb05690 SP |
170 | } |
171 | ||
e321180e | 172 | void load_command_list(const char *prefix, |
940208a7 MV |
173 | struct cmdnames *main_cmds, |
174 | struct cmdnames *other_cmds) | |
1eb05690 | 175 | { |
1eb05690 | 176 | const char *env_path = getenv("PATH"); |
1eb05690 SP |
177 | const char *exec_path = git_exec_path(); |
178 | ||
1f08e5ce | 179 | if (exec_path) { |
e321180e | 180 | list_commands_in_dir(main_cmds, exec_path, prefix); |
1f08e5ce AR |
181 | qsort(main_cmds->names, main_cmds->cnt, |
182 | sizeof(*main_cmds->names), cmdname_compare); | |
183 | uniq(main_cmds); | |
1eb05690 SP |
184 | } |
185 | ||
1f08e5ce AR |
186 | if (env_path) { |
187 | char *paths, *path, *colon; | |
188 | path = paths = xstrdup(env_path); | |
189 | while (1) { | |
190 | if ((colon = strchr(path, PATH_SEP))) | |
191 | *colon = 0; | |
746c221a PB |
192 | if (!exec_path || strcmp(path, exec_path)) |
193 | list_commands_in_dir(other_cmds, path, prefix); | |
1eb05690 | 194 | |
1f08e5ce AR |
195 | if (!colon) |
196 | break; | |
197 | path = colon + 1; | |
198 | } | |
199 | free(paths); | |
1eb05690 | 200 | |
1f08e5ce AR |
201 | qsort(other_cmds->names, other_cmds->cnt, |
202 | sizeof(*other_cmds->names), cmdname_compare); | |
203 | uniq(other_cmds); | |
204 | } | |
940208a7 | 205 | exclude_cmds(other_cmds, main_cmds); |
2156435f JK |
206 | } |
207 | ||
f4ed0af6 | 208 | void list_commands(unsigned int colopts, |
dbfae689 | 209 | struct cmdnames *main_cmds, struct cmdnames *other_cmds) |
2156435f | 210 | { |
940208a7 | 211 | if (main_cmds->cnt) { |
61c5d431 | 212 | const char *exec_path = git_exec_path(); |
4470ef94 | 213 | printf_ln(_("available git commands in '%s'"), exec_path); |
1eb05690 | 214 | putchar('\n'); |
dbfae689 | 215 | pretty_print_string_list(main_cmds, colopts); |
1eb05690 SP |
216 | putchar('\n'); |
217 | } | |
218 | ||
940208a7 | 219 | if (other_cmds->cnt) { |
4470ef94 | 220 | printf_ln(_("git commands available from elsewhere on your $PATH")); |
940208a7 | 221 | putchar('\n'); |
dbfae689 | 222 | pretty_print_string_list(other_cmds, colopts); |
1eb05690 SP |
223 | putchar('\n'); |
224 | } | |
70827b15 LT |
225 | } |
226 | ||
1542d4cd JH |
227 | void list_common_cmds_help(void) |
228 | { | |
229 | int i, longest = 0; | |
230 | ||
231 | for (i = 0; i < ARRAY_SIZE(common_cmds); i++) { | |
232 | if (longest < strlen(common_cmds[i].name)) | |
233 | longest = strlen(common_cmds[i].name); | |
234 | } | |
235 | ||
236 | puts(_("The most commonly used git commands are:")); | |
237 | for (i = 0; i < ARRAY_SIZE(common_cmds); i++) { | |
238 | printf(" %s ", common_cmds[i].name); | |
239 | mput_char(' ', longest - strlen(common_cmds[i].name)); | |
240 | puts(_(common_cmds[i].help)); | |
241 | } | |
242 | } | |
243 | ||
940208a7 | 244 | int is_in_cmdlist(struct cmdnames *c, const char *s) |
2156435f JK |
245 | { |
246 | int i; | |
247 | for (i = 0; i < c->cnt; i++) | |
248 | if (!strcmp(s, c->names[i]->name)) | |
249 | return 1; | |
250 | return 0; | |
251 | } | |
252 | ||
f0e90716 | 253 | static int autocorrect; |
746c221a | 254 | static struct cmdnames aliases; |
f0e90716 AR |
255 | |
256 | static int git_unknown_cmd_config(const char *var, const char *value, void *cb) | |
257 | { | |
258 | if (!strcmp(var, "help.autocorrect")) | |
259 | autocorrect = git_config_int(var,value); | |
746c221a PB |
260 | /* Also use aliases for command lookup */ |
261 | if (!prefixcmp(var, "alias.")) | |
262 | add_cmdname(&aliases, var + 6, strlen(var + 6)); | |
f0e90716 AR |
263 | |
264 | return git_default_config(var, value, cb); | |
265 | } | |
266 | ||
8af84dad | 267 | static int levenshtein_compare(const void *p1, const void *p2) |
822a7d50 | 268 | { |
8af84dad JS |
269 | const struct cmdname *const *c1 = p1, *const *c2 = p2; |
270 | const char *s1 = (*c1)->name, *s2 = (*c2)->name; | |
271 | int l1 = (*c1)->len; | |
272 | int l2 = (*c2)->len; | |
273 | return l1 != l2 ? l1 - l2 : strcmp(s1, s2); | |
274 | } | |
275 | ||
746c221a PB |
276 | static void add_cmd_list(struct cmdnames *cmds, struct cmdnames *old) |
277 | { | |
278 | int i; | |
279 | ALLOC_GROW(cmds->names, cmds->cnt + old->cnt, cmds->alloc); | |
280 | ||
281 | for (i = 0; i < old->cnt; i++) | |
282 | cmds->names[cmds->cnt++] = old->names[i]; | |
283 | free(old->names); | |
284 | old->cnt = 0; | |
285 | old->names = NULL; | |
286 | } | |
287 | ||
06500a02 | 288 | /* An empirically derived magic number */ |
6612b9e4 EFL |
289 | #define SIMILARITY_FLOOR 7 |
290 | #define SIMILAR_ENOUGH(x) ((x) < SIMILARITY_FLOOR) | |
06500a02 | 291 | |
823e0ded MS |
292 | static const char bad_interpreter_advice[] = |
293 | N_("'%s' appears to be a git command, but we were not\n" | |
294 | "able to execute it. Maybe git-%s is broken?"); | |
295 | ||
8af84dad | 296 | const char *help_unknown_cmd(const char *cmd) |
822a7d50 | 297 | { |
8af84dad JS |
298 | int i, n, best_similarity = 0; |
299 | struct cmdnames main_cmds, other_cmds; | |
300 | ||
301 | memset(&main_cmds, 0, sizeof(main_cmds)); | |
0b74f5dc | 302 | memset(&other_cmds, 0, sizeof(other_cmds)); |
746c221a | 303 | memset(&aliases, 0, sizeof(aliases)); |
8af84dad | 304 | |
f0e90716 AR |
305 | git_config(git_unknown_cmd_config, NULL); |
306 | ||
8af84dad JS |
307 | load_command_list("git-", &main_cmds, &other_cmds); |
308 | ||
746c221a PB |
309 | add_cmd_list(&main_cmds, &aliases); |
310 | add_cmd_list(&main_cmds, &other_cmds); | |
311 | qsort(main_cmds.names, main_cmds.cnt, | |
312 | sizeof(main_cmds.names), cmdname_compare); | |
313 | uniq(&main_cmds); | |
8af84dad | 314 | |
6612b9e4 EFL |
315 | /* This abuses cmdname->len for levenshtein distance */ |
316 | for (i = 0, n = 0; i < main_cmds.cnt; i++) { | |
317 | int cmp = 0; /* avoid compiler stupidity */ | |
318 | const char *candidate = main_cmds.names[i]->name; | |
319 | ||
823e0ded MS |
320 | /* |
321 | * An exact match means we have the command, but | |
322 | * for some reason exec'ing it gave us ENOENT; probably | |
323 | * it's a bad interpreter in the #! line. | |
324 | */ | |
325 | if (!strcmp(candidate, cmd)) | |
326 | die(_(bad_interpreter_advice), cmd, cmd); | |
327 | ||
6612b9e4 EFL |
328 | /* Does the candidate appear in common_cmds list? */ |
329 | while (n < ARRAY_SIZE(common_cmds) && | |
330 | (cmp = strcmp(common_cmds[n].name, candidate)) < 0) | |
331 | n++; | |
332 | if ((n < ARRAY_SIZE(common_cmds)) && !cmp) { | |
333 | /* Yes, this is one of the common commands */ | |
334 | n++; /* use the entry from common_cmds[] */ | |
335 | if (!prefixcmp(candidate, cmd)) { | |
336 | /* Give prefix match a very good score */ | |
337 | main_cmds.names[i]->len = 0; | |
338 | continue; | |
339 | } | |
340 | } | |
341 | ||
8af84dad | 342 | main_cmds.names[i]->len = |
c41494f8 | 343 | levenshtein(cmd, candidate, 0, 2, 1, 3) + 1; |
6612b9e4 | 344 | } |
8af84dad JS |
345 | |
346 | qsort(main_cmds.names, main_cmds.cnt, | |
347 | sizeof(*main_cmds.names), levenshtein_compare); | |
348 | ||
349 | if (!main_cmds.cnt) | |
9665627d | 350 | die(_("Uh oh. Your system reports no Git commands at all.")); |
8af84dad | 351 | |
6612b9e4 EFL |
352 | /* skip and count prefix matches */ |
353 | for (n = 0; n < main_cmds.cnt && !main_cmds.names[n]->len; n++) | |
354 | ; /* still counting */ | |
355 | ||
356 | if (main_cmds.cnt <= n) { | |
357 | /* prefix matches with everything? that is too ambiguous */ | |
358 | best_similarity = SIMILARITY_FLOOR + 1; | |
359 | } else { | |
360 | /* count all the most similar ones */ | |
361 | for (best_similarity = main_cmds.names[n++]->len; | |
362 | (n < main_cmds.cnt && | |
363 | best_similarity == main_cmds.names[n]->len); | |
364 | n++) | |
365 | ; /* still counting */ | |
366 | } | |
06500a02 | 367 | if (autocorrect && n == 1 && SIMILAR_ENOUGH(best_similarity)) { |
8af84dad JS |
368 | const char *assumed = main_cmds.names[0]->name; |
369 | main_cmds.names[0] = NULL; | |
370 | clean_cmdnames(&main_cmds); | |
9665627d NTND |
371 | fprintf_ln(stderr, |
372 | _("WARNING: You called a Git command named '%s', " | |
373 | "which does not exist.\n" | |
374 | "Continuing under the assumption that you meant '%s'"), | |
8af84dad | 375 | cmd, assumed); |
f0e90716 | 376 | if (autocorrect > 0) { |
9665627d | 377 | fprintf_ln(stderr, _("in %0.1f seconds automatically..."), |
f0e90716 AR |
378 | (float)autocorrect/10.0); |
379 | poll(NULL, 0, autocorrect * 100); | |
380 | } | |
8af84dad JS |
381 | return assumed; |
382 | } | |
383 | ||
9665627d | 384 | fprintf_ln(stderr, _("git: '%s' is not a git command. See 'git --help'."), cmd); |
8af84dad | 385 | |
06500a02 | 386 | if (SIMILAR_ENOUGH(best_similarity)) { |
9665627d NTND |
387 | fprintf_ln(stderr, |
388 | Q_("\nDid you mean this?", | |
389 | "\nDid you mean one of these?", | |
390 | n)); | |
8af84dad JS |
391 | |
392 | for (i = 0; i < n; i++) | |
393 | fprintf(stderr, "\t%s\n", main_cmds.names[i]->name); | |
394 | } | |
395 | ||
822a7d50 RJ |
396 | exit(1); |
397 | } | |
398 | ||
a633fca0 | 399 | int cmd_version(int argc, const char **argv, const char *prefix) |
70827b15 | 400 | { |
f2de0b97 DA |
401 | /* |
402 | * The format of this string should be kept stable for compatibility | |
403 | * with external projects that rely on the output of "git version". | |
404 | */ | |
70827b15 LT |
405 | printf("git version %s\n", git_version_string); |
406 | return 0; | |
407 | } | |
e5618106 VV |
408 | |
409 | struct similar_ref_cb { | |
410 | const char *base_ref; | |
411 | struct string_list *similar_refs; | |
412 | }; | |
413 | ||
414 | static int append_similar_ref(const char *refname, const unsigned char *sha1, | |
415 | int flags, void *cb_data) | |
416 | { | |
417 | struct similar_ref_cb *cb = (struct similar_ref_cb *)(cb_data); | |
418 | char *branch = strrchr(refname, '/') + 1; | |
419 | /* A remote branch of the same name is deemed similar */ | |
420 | if (!prefixcmp(refname, "refs/remotes/") && | |
421 | !strcmp(branch, cb->base_ref)) | |
422 | string_list_append(cb->similar_refs, | |
423 | refname + strlen("refs/remotes/")); | |
424 | return 0; | |
425 | } | |
426 | ||
427 | static struct string_list guess_refs(const char *ref) | |
428 | { | |
429 | struct similar_ref_cb ref_cb; | |
430 | struct string_list similar_refs = STRING_LIST_INIT_NODUP; | |
431 | ||
432 | ref_cb.base_ref = ref; | |
433 | ref_cb.similar_refs = &similar_refs; | |
434 | for_each_ref(append_similar_ref, &ref_cb); | |
435 | return similar_refs; | |
436 | } | |
437 | ||
438 | void help_unknown_ref(const char *ref, const char *cmd, const char *error) | |
439 | { | |
440 | int i; | |
441 | struct string_list suggested_refs = guess_refs(ref); | |
442 | ||
443 | fprintf_ln(stderr, _("%s: %s - %s"), cmd, ref, error); | |
444 | ||
445 | if (suggested_refs.nr > 0) { | |
446 | fprintf_ln(stderr, | |
447 | Q_("\nDid you mean this?", | |
448 | "\nDid you mean one of these?", | |
449 | suggested_refs.nr)); | |
450 | for (i = 0; i < suggested_refs.nr; i++) | |
451 | fprintf(stderr, "\t%s\n", suggested_refs.items[i].string); | |
452 | } | |
453 | ||
454 | string_list_clear(&suggested_refs, 0); | |
455 | exit(1); | |
456 | } |