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Commit | Line | Data |
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07800601 | 1 | #include "cache.h" |
148be2c1 | 2 | #include "../builtin.h" |
07800601 IM |
3 | #include "exec_cmd.h" |
4 | #include "levenshtein.h" | |
5 | #include "help.h" | |
6 | ||
f37a291c | 7 | void add_cmdname(struct cmdnames *cmds, const char *name, size_t len) |
07800601 IM |
8 | { |
9 | struct cmdname *ent = malloc(sizeof(*ent) + len + 1); | |
10 | ||
11 | ent->len = len; | |
12 | memcpy(ent->name, name, len); | |
13 | ent->name[len] = 0; | |
14 | ||
15 | ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc); | |
16 | cmds->names[cmds->cnt++] = ent; | |
17 | } | |
18 | ||
19 | static void clean_cmdnames(struct cmdnames *cmds) | |
20 | { | |
f37a291c IM |
21 | unsigned int i; |
22 | ||
07800601 IM |
23 | for (i = 0; i < cmds->cnt; ++i) |
24 | free(cmds->names[i]); | |
25 | free(cmds->names); | |
26 | cmds->cnt = 0; | |
27 | cmds->alloc = 0; | |
28 | } | |
29 | ||
30 | static int cmdname_compare(const void *a_, const void *b_) | |
31 | { | |
32 | struct cmdname *a = *(struct cmdname **)a_; | |
33 | struct cmdname *b = *(struct cmdname **)b_; | |
34 | return strcmp(a->name, b->name); | |
35 | } | |
36 | ||
37 | static void uniq(struct cmdnames *cmds) | |
38 | { | |
f37a291c | 39 | unsigned int i, j; |
07800601 IM |
40 | |
41 | if (!cmds->cnt) | |
42 | return; | |
43 | ||
44 | for (i = j = 1; i < cmds->cnt; i++) | |
45 | if (strcmp(cmds->names[i]->name, cmds->names[i-1]->name)) | |
46 | cmds->names[j++] = cmds->names[i]; | |
47 | ||
48 | cmds->cnt = j; | |
49 | } | |
50 | ||
51 | void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes) | |
52 | { | |
f37a291c | 53 | size_t ci, cj, ei; |
07800601 IM |
54 | int cmp; |
55 | ||
56 | ci = cj = ei = 0; | |
57 | while (ci < cmds->cnt && ei < excludes->cnt) { | |
58 | cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name); | |
59 | if (cmp < 0) | |
60 | cmds->names[cj++] = cmds->names[ci++]; | |
61 | else if (cmp == 0) | |
62 | ci++, ei++; | |
63 | else if (cmp > 0) | |
64 | ei++; | |
65 | } | |
66 | ||
67 | while (ci < cmds->cnt) | |
68 | cmds->names[cj++] = cmds->names[ci++]; | |
69 | ||
70 | cmds->cnt = cj; | |
71 | } | |
72 | ||
73 | static void pretty_print_string_list(struct cmdnames *cmds, int longest) | |
74 | { | |
75 | int cols = 1, rows; | |
76 | int space = longest + 1; /* min 1 SP between words */ | |
a41794cd ACM |
77 | struct winsize win; |
78 | int max_cols; | |
07800601 IM |
79 | int i, j; |
80 | ||
a41794cd ACM |
81 | get_term_dimensions(&win); |
82 | max_cols = win.ws_col - 1; /* don't print *on* the edge */ | |
83 | ||
07800601 IM |
84 | if (space < max_cols) |
85 | cols = max_cols / space; | |
86 | rows = (cmds->cnt + cols - 1) / cols; | |
87 | ||
88 | for (i = 0; i < rows; i++) { | |
89 | printf(" "); | |
90 | ||
91 | for (j = 0; j < cols; j++) { | |
f37a291c IM |
92 | unsigned int n = j * rows + i; |
93 | unsigned int size = space; | |
94 | ||
07800601 IM |
95 | if (n >= cmds->cnt) |
96 | break; | |
97 | if (j == cols-1 || n + rows >= cmds->cnt) | |
98 | size = 1; | |
99 | printf("%-*s", size, cmds->names[n]->name); | |
100 | } | |
101 | putchar('\n'); | |
102 | } | |
103 | } | |
104 | ||
105 | static int is_executable(const char *name) | |
106 | { | |
107 | struct stat st; | |
108 | ||
109 | if (stat(name, &st) || /* stat, not lstat */ | |
110 | !S_ISREG(st.st_mode)) | |
111 | return 0; | |
112 | ||
07800601 IM |
113 | return st.st_mode & S_IXUSR; |
114 | } | |
115 | ||
116 | static void list_commands_in_dir(struct cmdnames *cmds, | |
117 | const char *path, | |
118 | const char *prefix) | |
119 | { | |
120 | int prefix_len; | |
121 | DIR *dir = opendir(path); | |
122 | struct dirent *de; | |
123 | struct strbuf buf = STRBUF_INIT; | |
124 | int len; | |
125 | ||
126 | if (!dir) | |
127 | return; | |
128 | if (!prefix) | |
129 | prefix = "perf-"; | |
130 | prefix_len = strlen(prefix); | |
131 | ||
132 | strbuf_addf(&buf, "%s/", path); | |
133 | len = buf.len; | |
134 | ||
135 | while ((de = readdir(dir)) != NULL) { | |
136 | int entlen; | |
137 | ||
138 | if (prefixcmp(de->d_name, prefix)) | |
139 | continue; | |
140 | ||
141 | strbuf_setlen(&buf, len); | |
142 | strbuf_addstr(&buf, de->d_name); | |
143 | if (!is_executable(buf.buf)) | |
144 | continue; | |
145 | ||
146 | entlen = strlen(de->d_name) - prefix_len; | |
147 | if (has_extension(de->d_name, ".exe")) | |
148 | entlen -= 4; | |
149 | ||
150 | add_cmdname(cmds, de->d_name + prefix_len, entlen); | |
151 | } | |
152 | closedir(dir); | |
153 | strbuf_release(&buf); | |
154 | } | |
155 | ||
156 | void load_command_list(const char *prefix, | |
157 | struct cmdnames *main_cmds, | |
158 | struct cmdnames *other_cmds) | |
159 | { | |
160 | const char *env_path = getenv("PATH"); | |
161 | const char *exec_path = perf_exec_path(); | |
162 | ||
163 | if (exec_path) { | |
164 | list_commands_in_dir(main_cmds, exec_path, prefix); | |
165 | qsort(main_cmds->names, main_cmds->cnt, | |
166 | sizeof(*main_cmds->names), cmdname_compare); | |
167 | uniq(main_cmds); | |
168 | } | |
169 | ||
170 | if (env_path) { | |
171 | char *paths, *path, *colon; | |
172 | path = paths = strdup(env_path); | |
173 | while (1) { | |
174 | if ((colon = strchr(path, PATH_SEP))) | |
175 | *colon = 0; | |
176 | if (!exec_path || strcmp(path, exec_path)) | |
177 | list_commands_in_dir(other_cmds, path, prefix); | |
178 | ||
179 | if (!colon) | |
180 | break; | |
181 | path = colon + 1; | |
182 | } | |
183 | free(paths); | |
184 | ||
185 | qsort(other_cmds->names, other_cmds->cnt, | |
186 | sizeof(*other_cmds->names), cmdname_compare); | |
187 | uniq(other_cmds); | |
188 | } | |
189 | exclude_cmds(other_cmds, main_cmds); | |
190 | } | |
191 | ||
192 | void list_commands(const char *title, struct cmdnames *main_cmds, | |
193 | struct cmdnames *other_cmds) | |
194 | { | |
f37a291c | 195 | unsigned int i, longest = 0; |
07800601 IM |
196 | |
197 | for (i = 0; i < main_cmds->cnt; i++) | |
198 | if (longest < main_cmds->names[i]->len) | |
199 | longest = main_cmds->names[i]->len; | |
200 | for (i = 0; i < other_cmds->cnt; i++) | |
201 | if (longest < other_cmds->names[i]->len) | |
202 | longest = other_cmds->names[i]->len; | |
203 | ||
204 | if (main_cmds->cnt) { | |
205 | const char *exec_path = perf_exec_path(); | |
206 | printf("available %s in '%s'\n", title, exec_path); | |
207 | printf("----------------"); | |
208 | mput_char('-', strlen(title) + strlen(exec_path)); | |
209 | putchar('\n'); | |
210 | pretty_print_string_list(main_cmds, longest); | |
211 | putchar('\n'); | |
212 | } | |
213 | ||
214 | if (other_cmds->cnt) { | |
215 | printf("%s available from elsewhere on your $PATH\n", title); | |
216 | printf("---------------------------------------"); | |
217 | mput_char('-', strlen(title)); | |
218 | putchar('\n'); | |
219 | pretty_print_string_list(other_cmds, longest); | |
220 | putchar('\n'); | |
221 | } | |
222 | } | |
223 | ||
224 | int is_in_cmdlist(struct cmdnames *c, const char *s) | |
225 | { | |
f37a291c IM |
226 | unsigned int i; |
227 | ||
07800601 IM |
228 | for (i = 0; i < c->cnt; i++) |
229 | if (!strcmp(s, c->names[i]->name)) | |
230 | return 1; | |
231 | return 0; | |
232 | } | |
233 | ||
234 | static int autocorrect; | |
235 | static struct cmdnames aliases; | |
236 | ||
237 | static int perf_unknown_cmd_config(const char *var, const char *value, void *cb) | |
238 | { | |
239 | if (!strcmp(var, "help.autocorrect")) | |
240 | autocorrect = perf_config_int(var,value); | |
241 | /* Also use aliases for command lookup */ | |
242 | if (!prefixcmp(var, "alias.")) | |
243 | add_cmdname(&aliases, var + 6, strlen(var + 6)); | |
244 | ||
245 | return perf_default_config(var, value, cb); | |
246 | } | |
247 | ||
248 | static int levenshtein_compare(const void *p1, const void *p2) | |
249 | { | |
250 | const struct cmdname *const *c1 = p1, *const *c2 = p2; | |
251 | const char *s1 = (*c1)->name, *s2 = (*c2)->name; | |
252 | int l1 = (*c1)->len; | |
253 | int l2 = (*c2)->len; | |
254 | return l1 != l2 ? l1 - l2 : strcmp(s1, s2); | |
255 | } | |
256 | ||
257 | static void add_cmd_list(struct cmdnames *cmds, struct cmdnames *old) | |
258 | { | |
f37a291c IM |
259 | unsigned int i; |
260 | ||
07800601 IM |
261 | ALLOC_GROW(cmds->names, cmds->cnt + old->cnt, cmds->alloc); |
262 | ||
263 | for (i = 0; i < old->cnt; i++) | |
264 | cmds->names[cmds->cnt++] = old->names[i]; | |
265 | free(old->names); | |
266 | old->cnt = 0; | |
267 | old->names = NULL; | |
268 | } | |
269 | ||
270 | const char *help_unknown_cmd(const char *cmd) | |
271 | { | |
f37a291c | 272 | unsigned int i, n = 0, best_similarity = 0; |
07800601 IM |
273 | struct cmdnames main_cmds, other_cmds; |
274 | ||
275 | memset(&main_cmds, 0, sizeof(main_cmds)); | |
276 | memset(&other_cmds, 0, sizeof(main_cmds)); | |
277 | memset(&aliases, 0, sizeof(aliases)); | |
278 | ||
279 | perf_config(perf_unknown_cmd_config, NULL); | |
280 | ||
281 | load_command_list("perf-", &main_cmds, &other_cmds); | |
282 | ||
283 | add_cmd_list(&main_cmds, &aliases); | |
284 | add_cmd_list(&main_cmds, &other_cmds); | |
285 | qsort(main_cmds.names, main_cmds.cnt, | |
286 | sizeof(main_cmds.names), cmdname_compare); | |
287 | uniq(&main_cmds); | |
288 | ||
051cdc3c IM |
289 | if (main_cmds.cnt) { |
290 | /* This reuses cmdname->len for similarity index */ | |
291 | for (i = 0; i < main_cmds.cnt; ++i) | |
292 | main_cmds.names[i]->len = | |
293 | levenshtein(cmd, main_cmds.names[i]->name, 0, 2, 1, 4); | |
07800601 | 294 | |
051cdc3c IM |
295 | qsort(main_cmds.names, main_cmds.cnt, |
296 | sizeof(*main_cmds.names), levenshtein_compare); | |
297 | ||
298 | best_similarity = main_cmds.names[0]->len; | |
299 | n = 1; | |
300 | while (n < main_cmds.cnt && best_similarity == main_cmds.names[n]->len) | |
301 | ++n; | |
302 | } | |
07800601 | 303 | |
07800601 IM |
304 | if (autocorrect && n == 1) { |
305 | const char *assumed = main_cmds.names[0]->name; | |
051cdc3c | 306 | |
07800601 IM |
307 | main_cmds.names[0] = NULL; |
308 | clean_cmdnames(&main_cmds); | |
a41794cd | 309 | fprintf(stderr, "WARNING: You called a perf program named '%s', " |
07800601 IM |
310 | "which does not exist.\n" |
311 | "Continuing under the assumption that you meant '%s'\n", | |
312 | cmd, assumed); | |
313 | if (autocorrect > 0) { | |
314 | fprintf(stderr, "in %0.1f seconds automatically...\n", | |
315 | (float)autocorrect/10.0); | |
316 | poll(NULL, 0, autocorrect * 100); | |
317 | } | |
318 | return assumed; | |
319 | } | |
320 | ||
321 | fprintf(stderr, "perf: '%s' is not a perf-command. See 'perf --help'.\n", cmd); | |
322 | ||
051cdc3c | 323 | if (main_cmds.cnt && best_similarity < 6) { |
07800601 IM |
324 | fprintf(stderr, "\nDid you mean %s?\n", |
325 | n < 2 ? "this": "one of these"); | |
326 | ||
327 | for (i = 0; i < n; i++) | |
328 | fprintf(stderr, "\t%s\n", main_cmds.names[i]->name); | |
329 | } | |
330 | ||
331 | exit(1); | |
332 | } | |
333 | ||
f37a291c | 334 | int cmd_version(int argc __used, const char **argv __used, const char *prefix __used) |
07800601 IM |
335 | { |
336 | printf("perf version %s\n", perf_version_string); | |
337 | return 0; | |
338 | } |