Fix git-rerere documentation
[git] / wt-status.c
1 #include "cache.h"
2 #include "wt-status.h"
3 #include "color.h"
4 #include "object.h"
5 #include "dir.h"
6 #include "commit.h"
7 #include "diff.h"
8 #include "revision.h"
9 #include "diffcore.h"
10
11 int wt_status_relative_paths = 1;
12 int wt_status_use_color = 0;
13 static char wt_status_colors[][COLOR_MAXLEN] = {
14         "",         /* WT_STATUS_HEADER: normal */
15         "\033[32m", /* WT_STATUS_UPDATED: green */
16         "\033[31m", /* WT_STATUS_CHANGED: red */
17         "\033[31m", /* WT_STATUS_UNTRACKED: red */
18 };
19
20 static const char use_add_msg[] =
21 "use \"git add <file>...\" to update what will be committed";
22 static const char use_add_rm_msg[] =
23 "use \"git add/rm <file>...\" to update what will be committed";
24 static const char use_add_to_include_msg[] =
25 "use \"git add <file>...\" to include in what will be committed";
26
27 static int parse_status_slot(const char *var, int offset)
28 {
29         if (!strcasecmp(var+offset, "header"))
30                 return WT_STATUS_HEADER;
31         if (!strcasecmp(var+offset, "updated")
32                 || !strcasecmp(var+offset, "added"))
33                 return WT_STATUS_UPDATED;
34         if (!strcasecmp(var+offset, "changed"))
35                 return WT_STATUS_CHANGED;
36         if (!strcasecmp(var+offset, "untracked"))
37                 return WT_STATUS_UNTRACKED;
38         die("bad config variable '%s'", var);
39 }
40
41 static const char* color(int slot)
42 {
43         return wt_status_use_color ? wt_status_colors[slot] : "";
44 }
45
46 void wt_status_prepare(struct wt_status *s)
47 {
48         unsigned char sha1[20];
49         const char *head;
50
51         memset(s, 0, sizeof(*s));
52         head = resolve_ref("HEAD", sha1, 0, NULL);
53         s->branch = head ? xstrdup(head) : NULL;
54         s->reference = "HEAD";
55         s->fp = stdout;
56         s->index_file = get_index_file();
57 }
58
59 static void wt_status_print_cached_header(struct wt_status *s)
60 {
61         const char *c = color(WT_STATUS_HEADER);
62         color_fprintf_ln(s->fp, c, "# Changes to be committed:");
63         if (s->reference) {
64                 color_fprintf_ln(s->fp, c, "#   (use \"git reset %s <file>...\" to unstage)", s->reference);
65         } else {
66                 color_fprintf_ln(s->fp, c, "#   (use \"git rm --cached <file>...\" to unstage)");
67         }
68         color_fprintf_ln(s->fp, c, "#");
69 }
70
71 static void wt_status_print_header(struct wt_status *s,
72                                    const char *main, const char *sub)
73 {
74         const char *c = color(WT_STATUS_HEADER);
75         color_fprintf_ln(s->fp, c, "# %s:", main);
76         color_fprintf_ln(s->fp, c, "#   (%s)", sub);
77         color_fprintf_ln(s->fp, c, "#");
78 }
79
80 static void wt_status_print_trailer(struct wt_status *s)
81 {
82         color_fprintf_ln(s->fp, color(WT_STATUS_HEADER), "#");
83 }
84
85 static char *quote_path(const char *in, int len,
86                         struct strbuf *out, const char *prefix)
87 {
88         if (len < 0)
89                 len = strlen(in);
90
91         strbuf_grow(out, len);
92         strbuf_setlen(out, 0);
93         if (prefix) {
94                 int off = 0;
95                 while (prefix[off] && off < len && prefix[off] == in[off])
96                         if (prefix[off] == '/') {
97                                 prefix += off + 1;
98                                 in += off + 1;
99                                 len -= off + 1;
100                                 off = 0;
101                         } else
102                                 off++;
103
104                 for (; *prefix; prefix++)
105                         if (*prefix == '/')
106                                 strbuf_addstr(out, "../");
107         }
108
109         for ( ; len > 0; in++, len--) {
110                 int ch = *in;
111
112                 switch (ch) {
113                 case '\n':
114                         strbuf_addstr(out, "\\n");
115                         break;
116                 case '\r':
117                         strbuf_addstr(out, "\\r");
118                         break;
119                 default:
120                         strbuf_addch(out, ch);
121                         continue;
122                 }
123         }
124
125         if (!out->len)
126                 strbuf_addstr(out, "./");
127
128         return out->buf;
129 }
130
131 static void wt_status_print_filepair(struct wt_status *s,
132                                      int t, struct diff_filepair *p)
133 {
134         const char *c = color(t);
135         const char *one, *two;
136         struct strbuf onebuf, twobuf;
137
138         strbuf_init(&onebuf, 0);
139         strbuf_init(&twobuf, 0);
140         one = quote_path(p->one->path, -1, &onebuf, s->prefix);
141         two = quote_path(p->two->path, -1, &twobuf, s->prefix);
142
143         color_fprintf(s->fp, color(WT_STATUS_HEADER), "#\t");
144         switch (p->status) {
145         case DIFF_STATUS_ADDED:
146                 color_fprintf(s->fp, c, "new file:   %s", one);
147                 break;
148         case DIFF_STATUS_COPIED:
149                 color_fprintf(s->fp, c, "copied:     %s -> %s", one, two);
150                 break;
151         case DIFF_STATUS_DELETED:
152                 color_fprintf(s->fp, c, "deleted:    %s", one);
153                 break;
154         case DIFF_STATUS_MODIFIED:
155                 color_fprintf(s->fp, c, "modified:   %s", one);
156                 break;
157         case DIFF_STATUS_RENAMED:
158                 color_fprintf(s->fp, c, "renamed:    %s -> %s", one, two);
159                 break;
160         case DIFF_STATUS_TYPE_CHANGED:
161                 color_fprintf(s->fp, c, "typechange: %s", one);
162                 break;
163         case DIFF_STATUS_UNKNOWN:
164                 color_fprintf(s->fp, c, "unknown:    %s", one);
165                 break;
166         case DIFF_STATUS_UNMERGED:
167                 color_fprintf(s->fp, c, "unmerged:   %s", one);
168                 break;
169         default:
170                 die("bug: unhandled diff status %c", p->status);
171         }
172         fprintf(s->fp, "\n");
173         strbuf_release(&onebuf);
174         strbuf_release(&twobuf);
175 }
176
177 static void wt_status_print_updated_cb(struct diff_queue_struct *q,
178                 struct diff_options *options,
179                 void *data)
180 {
181         struct wt_status *s = data;
182         int shown_header = 0;
183         int i;
184         for (i = 0; i < q->nr; i++) {
185                 if (q->queue[i]->status == 'U')
186                         continue;
187                 if (!shown_header) {
188                         wt_status_print_cached_header(s);
189                         s->commitable = 1;
190                         shown_header = 1;
191                 }
192                 wt_status_print_filepair(s, WT_STATUS_UPDATED, q->queue[i]);
193         }
194         if (shown_header)
195                 wt_status_print_trailer(s);
196 }
197
198 static void wt_status_print_changed_cb(struct diff_queue_struct *q,
199                         struct diff_options *options,
200                         void *data)
201 {
202         struct wt_status *s = data;
203         int i;
204         if (q->nr) {
205                 const char *msg = use_add_msg;
206                 s->workdir_dirty = 1;
207                 for (i = 0; i < q->nr; i++)
208                         if (q->queue[i]->status == DIFF_STATUS_DELETED) {
209                                 msg = use_add_rm_msg;
210                                 break;
211                         }
212                 wt_status_print_header(s, "Changed but not updated", msg);
213         }
214         for (i = 0; i < q->nr; i++)
215                 wt_status_print_filepair(s, WT_STATUS_CHANGED, q->queue[i]);
216         if (q->nr)
217                 wt_status_print_trailer(s);
218 }
219
220 static void wt_read_cache(struct wt_status *s)
221 {
222         discard_cache();
223         read_cache_from(s->index_file);
224 }
225
226 static void wt_status_print_initial(struct wt_status *s)
227 {
228         int i;
229         struct strbuf buf;
230
231         strbuf_init(&buf, 0);
232         wt_read_cache(s);
233         if (active_nr) {
234                 s->commitable = 1;
235                 wt_status_print_cached_header(s);
236         }
237         for (i = 0; i < active_nr; i++) {
238                 color_fprintf(s->fp, color(WT_STATUS_HEADER), "#\t");
239                 color_fprintf_ln(s->fp, color(WT_STATUS_UPDATED), "new file: %s",
240                                 quote_path(active_cache[i]->name, -1,
241                                            &buf, s->prefix));
242         }
243         if (active_nr)
244                 wt_status_print_trailer(s);
245         strbuf_release(&buf);
246 }
247
248 static void wt_status_print_updated(struct wt_status *s)
249 {
250         struct rev_info rev;
251         init_revisions(&rev, NULL);
252         setup_revisions(0, NULL, &rev, s->reference);
253         rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
254         rev.diffopt.format_callback = wt_status_print_updated_cb;
255         rev.diffopt.format_callback_data = s;
256         rev.diffopt.detect_rename = 1;
257         rev.diffopt.rename_limit = 100;
258         rev.diffopt.break_opt = 0;
259         wt_read_cache(s);
260         run_diff_index(&rev, 1);
261 }
262
263 static void wt_status_print_changed(struct wt_status *s)
264 {
265         struct rev_info rev;
266         init_revisions(&rev, "");
267         setup_revisions(0, NULL, &rev, NULL);
268         rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
269         rev.diffopt.format_callback = wt_status_print_changed_cb;
270         rev.diffopt.format_callback_data = s;
271         wt_read_cache(s);
272         run_diff_files(&rev, 0);
273 }
274
275 static void wt_status_print_untracked(struct wt_status *s)
276 {
277         struct dir_struct dir;
278         int i;
279         int shown_header = 0;
280         struct strbuf buf;
281
282         strbuf_init(&buf, 0);
283         memset(&dir, 0, sizeof(dir));
284
285         if (!s->untracked) {
286                 dir.show_other_directories = 1;
287                 dir.hide_empty_directories = 1;
288         }
289         setup_standard_excludes(&dir);
290
291         read_directory(&dir, ".", "", 0, NULL);
292         for(i = 0; i < dir.nr; i++) {
293                 /* check for matching entry, which is unmerged; lifted from
294                  * builtin-ls-files:show_other_files */
295                 struct dir_entry *ent = dir.entries[i];
296                 int pos = cache_name_pos(ent->name, ent->len);
297                 struct cache_entry *ce;
298                 if (0 <= pos)
299                         die("bug in wt_status_print_untracked");
300                 pos = -pos - 1;
301                 if (pos < active_nr) {
302                         ce = active_cache[pos];
303                         if (ce_namelen(ce) == ent->len &&
304                             !memcmp(ce->name, ent->name, ent->len))
305                                 continue;
306                 }
307                 if (!shown_header) {
308                         s->workdir_untracked = 1;
309                         wt_status_print_header(s, "Untracked files",
310                                                use_add_to_include_msg);
311                         shown_header = 1;
312                 }
313                 color_fprintf(s->fp, color(WT_STATUS_HEADER), "#\t");
314                 color_fprintf_ln(s->fp, color(WT_STATUS_UNTRACKED), "%s",
315                                 quote_path(ent->name, ent->len,
316                                         &buf, s->prefix));
317         }
318         strbuf_release(&buf);
319 }
320
321 static void wt_status_print_verbose(struct wt_status *s)
322 {
323         struct rev_info rev;
324         int saved_stdout;
325
326         fflush(s->fp);
327
328         /* Sigh, the entire diff machinery is hardcoded to output to
329          * stdout.  Do the dup-dance...*/
330         saved_stdout = dup(STDOUT_FILENO);
331         if (saved_stdout < 0 ||dup2(fileno(s->fp), STDOUT_FILENO) < 0)
332                 die("couldn't redirect stdout\n");
333
334         init_revisions(&rev, NULL);
335         setup_revisions(0, NULL, &rev, s->reference);
336         rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
337         rev.diffopt.detect_rename = 1;
338         wt_read_cache(s);
339         run_diff_index(&rev, 1);
340
341         fflush(stdout);
342
343         if (dup2(saved_stdout, STDOUT_FILENO) < 0)
344                 die("couldn't restore stdout\n");
345         close(saved_stdout);
346 }
347
348 void wt_status_print(struct wt_status *s)
349 {
350         unsigned char sha1[20];
351         s->is_initial = get_sha1(s->reference, sha1) ? 1 : 0;
352
353         if (s->branch) {
354                 const char *on_what = "On branch ";
355                 const char *branch_name = s->branch;
356                 if (!prefixcmp(branch_name, "refs/heads/"))
357                         branch_name += 11;
358                 else if (!strcmp(branch_name, "HEAD")) {
359                         branch_name = "";
360                         on_what = "Not currently on any branch.";
361                 }
362                 color_fprintf_ln(s->fp, color(WT_STATUS_HEADER),
363                         "# %s%s", on_what, branch_name);
364         }
365
366         if (s->is_initial) {
367                 color_fprintf_ln(s->fp, color(WT_STATUS_HEADER), "#");
368                 color_fprintf_ln(s->fp, color(WT_STATUS_HEADER), "# Initial commit");
369                 color_fprintf_ln(s->fp, color(WT_STATUS_HEADER), "#");
370                 wt_status_print_initial(s);
371         }
372         else {
373                 wt_status_print_updated(s);
374         }
375
376         wt_status_print_changed(s);
377         wt_status_print_untracked(s);
378
379         if (s->verbose && !s->is_initial)
380                 wt_status_print_verbose(s);
381         if (!s->commitable) {
382                 if (s->amend)
383                         fprintf(s->fp, "# No changes\n");
384                 else if (s->nowarn)
385                         ; /* nothing */
386                 else if (s->workdir_dirty)
387                         printf("no changes added to commit (use \"git add\" and/or \"git commit -a\")\n");
388                 else if (s->workdir_untracked)
389                         printf("nothing added to commit but untracked files present (use \"git add\" to track)\n");
390                 else if (s->is_initial)
391                         printf("nothing to commit (create/copy files and use \"git add\" to track)\n");
392                 else
393                         printf("nothing to commit (working directory clean)\n");
394         }
395 }
396
397 int git_status_config(const char *k, const char *v)
398 {
399         if (!strcmp(k, "status.color") || !strcmp(k, "color.status")) {
400                 wt_status_use_color = git_config_colorbool(k, v, -1);
401                 return 0;
402         }
403         if (!prefixcmp(k, "status.color.") || !prefixcmp(k, "color.status.")) {
404                 int slot = parse_status_slot(k, 13);
405                 color_parse(v, k, wt_status_colors[slot]);
406                 return 0;
407         }
408         if (!strcmp(k, "status.relativepaths")) {
409                 wt_status_relative_paths = git_config_bool(k, v);
410                 return 0;
411         }
412         return git_default_config(k, v);
413 }