]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * "diff --no-index" support | |
3 | * Copyright (c) 2007 by Johannes Schindelin | |
4 | * Copyright (c) 2008 by Junio C Hamano | |
5 | */ | |
6 | ||
7 | #include "cache.h" | |
8 | #include "color.h" | |
9 | #include "commit.h" | |
10 | #include "blob.h" | |
11 | #include "tag.h" | |
12 | #include "diff.h" | |
13 | #include "diffcore.h" | |
14 | #include "revision.h" | |
15 | #include "log-tree.h" | |
16 | #include "builtin.h" | |
17 | #include "string-list.h" | |
18 | #include "dir.h" | |
19 | ||
20 | static int read_directory_contents(const char *path, struct string_list *list) | |
21 | { | |
22 | DIR *dir; | |
23 | struct dirent *e; | |
24 | ||
25 | if (!(dir = opendir(path))) | |
26 | return error("Could not open directory %s", path); | |
27 | ||
28 | while ((e = readdir(dir))) | |
29 | if (!is_dot_or_dotdot(e->d_name)) | |
30 | string_list_insert(list, e->d_name); | |
31 | ||
32 | closedir(dir); | |
33 | return 0; | |
34 | } | |
35 | ||
36 | /* | |
37 | * This should be "(standard input)" or something, but it will | |
38 | * probably expose many more breakages in the way no-index code | |
39 | * is bolted onto the diff callchain. | |
40 | */ | |
41 | static const char file_from_standard_input[] = "-"; | |
42 | ||
43 | static int get_mode(const char *path, int *mode) | |
44 | { | |
45 | struct stat st; | |
46 | ||
47 | if (!path || !strcmp(path, "/dev/null")) | |
48 | *mode = 0; | |
49 | #ifdef GIT_WINDOWS_NATIVE | |
50 | else if (!strcasecmp(path, "nul")) | |
51 | *mode = 0; | |
52 | #endif | |
53 | else if (path == file_from_standard_input) | |
54 | *mode = create_ce_mode(0666); | |
55 | else if (lstat(path, &st)) | |
56 | return error("Could not access '%s'", path); | |
57 | else | |
58 | *mode = st.st_mode; | |
59 | return 0; | |
60 | } | |
61 | ||
62 | static int populate_from_stdin(struct diff_filespec *s) | |
63 | { | |
64 | struct strbuf buf = STRBUF_INIT; | |
65 | size_t size = 0; | |
66 | ||
67 | if (strbuf_read(&buf, 0, 0) < 0) | |
68 | return error_errno("error while reading from stdin"); | |
69 | ||
70 | s->should_munmap = 0; | |
71 | s->data = strbuf_detach(&buf, &size); | |
72 | s->size = size; | |
73 | s->should_free = 1; | |
74 | s->is_stdin = 1; | |
75 | return 0; | |
76 | } | |
77 | ||
78 | static struct diff_filespec *noindex_filespec(const char *name, int mode) | |
79 | { | |
80 | struct diff_filespec *s; | |
81 | ||
82 | if (!name) | |
83 | name = "/dev/null"; | |
84 | s = alloc_filespec(name); | |
85 | fill_filespec(s, &null_oid, 0, mode); | |
86 | if (name == file_from_standard_input) | |
87 | populate_from_stdin(s); | |
88 | return s; | |
89 | } | |
90 | ||
91 | static int queue_diff(struct diff_options *o, | |
92 | const char *name1, const char *name2) | |
93 | { | |
94 | int mode1 = 0, mode2 = 0; | |
95 | ||
96 | if (get_mode(name1, &mode1) || get_mode(name2, &mode2)) | |
97 | return -1; | |
98 | ||
99 | if (mode1 && mode2 && S_ISDIR(mode1) != S_ISDIR(mode2)) { | |
100 | struct diff_filespec *d1, *d2; | |
101 | ||
102 | if (S_ISDIR(mode1)) { | |
103 | /* 2 is file that is created */ | |
104 | d1 = noindex_filespec(NULL, 0); | |
105 | d2 = noindex_filespec(name2, mode2); | |
106 | name2 = NULL; | |
107 | mode2 = 0; | |
108 | } else { | |
109 | /* 1 is file that is deleted */ | |
110 | d1 = noindex_filespec(name1, mode1); | |
111 | d2 = noindex_filespec(NULL, 0); | |
112 | name1 = NULL; | |
113 | mode1 = 0; | |
114 | } | |
115 | /* emit that file */ | |
116 | diff_queue(&diff_queued_diff, d1, d2); | |
117 | ||
118 | /* and then let the entire directory be created or deleted */ | |
119 | } | |
120 | ||
121 | if (S_ISDIR(mode1) || S_ISDIR(mode2)) { | |
122 | struct strbuf buffer1 = STRBUF_INIT; | |
123 | struct strbuf buffer2 = STRBUF_INIT; | |
124 | struct string_list p1 = STRING_LIST_INIT_DUP; | |
125 | struct string_list p2 = STRING_LIST_INIT_DUP; | |
126 | int i1, i2, ret = 0; | |
127 | size_t len1 = 0, len2 = 0; | |
128 | ||
129 | if (name1 && read_directory_contents(name1, &p1)) | |
130 | return -1; | |
131 | if (name2 && read_directory_contents(name2, &p2)) { | |
132 | string_list_clear(&p1, 0); | |
133 | return -1; | |
134 | } | |
135 | ||
136 | if (name1) { | |
137 | strbuf_addstr(&buffer1, name1); | |
138 | strbuf_complete(&buffer1, '/'); | |
139 | len1 = buffer1.len; | |
140 | } | |
141 | ||
142 | if (name2) { | |
143 | strbuf_addstr(&buffer2, name2); | |
144 | strbuf_complete(&buffer2, '/'); | |
145 | len2 = buffer2.len; | |
146 | } | |
147 | ||
148 | for (i1 = i2 = 0; !ret && (i1 < p1.nr || i2 < p2.nr); ) { | |
149 | const char *n1, *n2; | |
150 | int comp; | |
151 | ||
152 | strbuf_setlen(&buffer1, len1); | |
153 | strbuf_setlen(&buffer2, len2); | |
154 | ||
155 | if (i1 == p1.nr) | |
156 | comp = 1; | |
157 | else if (i2 == p2.nr) | |
158 | comp = -1; | |
159 | else | |
160 | comp = strcmp(p1.items[i1].string, p2.items[i2].string); | |
161 | ||
162 | if (comp > 0) | |
163 | n1 = NULL; | |
164 | else { | |
165 | strbuf_addstr(&buffer1, p1.items[i1++].string); | |
166 | n1 = buffer1.buf; | |
167 | } | |
168 | ||
169 | if (comp < 0) | |
170 | n2 = NULL; | |
171 | else { | |
172 | strbuf_addstr(&buffer2, p2.items[i2++].string); | |
173 | n2 = buffer2.buf; | |
174 | } | |
175 | ||
176 | ret = queue_diff(o, n1, n2); | |
177 | } | |
178 | string_list_clear(&p1, 0); | |
179 | string_list_clear(&p2, 0); | |
180 | strbuf_release(&buffer1); | |
181 | strbuf_release(&buffer2); | |
182 | ||
183 | return ret; | |
184 | } else { | |
185 | struct diff_filespec *d1, *d2; | |
186 | ||
187 | if (o->flags.reverse_diff) { | |
188 | SWAP(mode1, mode2); | |
189 | SWAP(name1, name2); | |
190 | } | |
191 | ||
192 | d1 = noindex_filespec(name1, mode1); | |
193 | d2 = noindex_filespec(name2, mode2); | |
194 | diff_queue(&diff_queued_diff, d1, d2); | |
195 | return 0; | |
196 | } | |
197 | } | |
198 | ||
199 | /* append basename of F to D */ | |
200 | static void append_basename(struct strbuf *path, const char *dir, const char *file) | |
201 | { | |
202 | const char *tail = strrchr(file, '/'); | |
203 | ||
204 | strbuf_addstr(path, dir); | |
205 | while (path->len && path->buf[path->len - 1] == '/') | |
206 | path->len--; | |
207 | strbuf_addch(path, '/'); | |
208 | strbuf_addstr(path, tail ? tail + 1 : file); | |
209 | } | |
210 | ||
211 | /* | |
212 | * DWIM "diff D F" into "diff D/F F" and "diff F D" into "diff F D/F" | |
213 | * Note that we append the basename of F to D/, so "diff a/b/file D" | |
214 | * becomes "diff a/b/file D/file", not "diff a/b/file D/a/b/file". | |
215 | */ | |
216 | static void fixup_paths(const char **path, struct strbuf *replacement) | |
217 | { | |
218 | unsigned int isdir0, isdir1; | |
219 | ||
220 | if (path[0] == file_from_standard_input || | |
221 | path[1] == file_from_standard_input) | |
222 | return; | |
223 | isdir0 = is_directory(path[0]); | |
224 | isdir1 = is_directory(path[1]); | |
225 | if (isdir0 == isdir1) | |
226 | return; | |
227 | if (isdir0) { | |
228 | append_basename(replacement, path[0], path[1]); | |
229 | path[0] = replacement->buf; | |
230 | } else { | |
231 | append_basename(replacement, path[1], path[0]); | |
232 | path[1] = replacement->buf; | |
233 | } | |
234 | } | |
235 | ||
236 | void diff_no_index(struct repository *r, | |
237 | struct rev_info *revs, | |
238 | int argc, const char **argv) | |
239 | { | |
240 | int i; | |
241 | const char *paths[2]; | |
242 | struct strbuf replacement = STRBUF_INIT; | |
243 | const char *prefix = revs->prefix; | |
244 | ||
245 | /* | |
246 | * FIXME: --no-index should not look at index and we should be | |
247 | * able to pass NULL repo. Maybe later. | |
248 | */ | |
249 | repo_diff_setup(r, &revs->diffopt); | |
250 | for (i = 1; i < argc - 2; ) { | |
251 | int j; | |
252 | if (!strcmp(argv[i], "--no-index")) | |
253 | i++; | |
254 | else if (!strcmp(argv[i], "--")) | |
255 | i++; | |
256 | else { | |
257 | j = diff_opt_parse(&revs->diffopt, argv + i, argc - i, | |
258 | revs->prefix); | |
259 | if (j <= 0) | |
260 | die("invalid diff option/value: %s", argv[i]); | |
261 | i += j; | |
262 | } | |
263 | } | |
264 | ||
265 | for (i = 0; i < 2; i++) { | |
266 | const char *p = argv[argc - 2 + i]; | |
267 | if (!strcmp(p, "-")) | |
268 | /* | |
269 | * stdin should be spelled as "-"; if you have | |
270 | * path that is "-", spell it as "./-". | |
271 | */ | |
272 | p = file_from_standard_input; | |
273 | else if (prefix) | |
274 | p = prefix_filename(prefix, p); | |
275 | paths[i] = p; | |
276 | } | |
277 | ||
278 | fixup_paths(paths, &replacement); | |
279 | ||
280 | revs->diffopt.skip_stat_unmatch = 1; | |
281 | if (!revs->diffopt.output_format) | |
282 | revs->diffopt.output_format = DIFF_FORMAT_PATCH; | |
283 | ||
284 | revs->diffopt.flags.no_index = 1; | |
285 | ||
286 | revs->diffopt.flags.relative_name = 1; | |
287 | revs->diffopt.prefix = prefix; | |
288 | ||
289 | revs->max_count = -2; | |
290 | diff_setup_done(&revs->diffopt); | |
291 | ||
292 | setup_diff_pager(&revs->diffopt); | |
293 | revs->diffopt.flags.exit_with_status = 1; | |
294 | ||
295 | if (queue_diff(&revs->diffopt, paths[0], paths[1])) | |
296 | exit(1); | |
297 | diff_set_mnemonic_prefix(&revs->diffopt, "1/", "2/"); | |
298 | diffcore_std(&revs->diffopt); | |
299 | diff_flush(&revs->diffopt); | |
300 | ||
301 | strbuf_release(&replacement); | |
302 | ||
303 | /* | |
304 | * The return code for --no-index imitates diff(1): | |
305 | * 0 = no changes, 1 = changes, else error | |
306 | */ | |
307 | exit(diff_result_code(&revs->diffopt, 0)); | |
308 | } |