1#include "cache.h"
2#include "tag.h"
3#include "blob.h"
4#include "tree.h"
5#include "commit.h"
6#include "refs.h"
7#include "revision.h"
8static char *path_name(struct name_path *path, const char *name)
10{
11 struct name_path *p;
12 char *n, *m;
13 int nlen = strlen(name);
14 int len = nlen + 1;
15 for (p = path; p; p = p->up) {
17 if (p->elem_len)
18 len += p->elem_len + 1;
19 }
20 n = xmalloc(len);
21 m = n + len - (nlen + 1);
22 strcpy(m, name);
23 for (p = path; p; p = p->up) {
24 if (p->elem_len) {
25 m -= p->elem_len + 1;
26 memcpy(m, p->elem, p->elem_len);
27 m[p->elem_len] = '/';
28 }
29 }
30 return n;
31}
32struct object_list **add_object(struct object *obj,
34 struct object_list **p,
35 struct name_path *path,
36 const char *name)
37{
38 struct object_list *entry = xmalloc(sizeof(*entry));
39 entry->item = obj;
40 entry->next = *p;
41 entry->name = path_name(path, name);
42 *p = entry;
43 return &entry->next;
44}
45static void mark_blob_uninteresting(struct blob *blob)
47{
48 if (blob->object.flags & UNINTERESTING)
49 return;
50 blob->object.flags |= UNINTERESTING;
51}
52void mark_tree_uninteresting(struct tree *tree)
54{
55 struct object *obj = &tree->object;
56 struct tree_entry_list *entry;
57 if (obj->flags & UNINTERESTING)
59 return;
60 obj->flags |= UNINTERESTING;
61 if (!has_sha1_file(obj->sha1))
62 return;
63 if (parse_tree(tree) < 0)
64 die("bad tree %s", sha1_to_hex(obj->sha1));
65 entry = tree->entries;
66 tree->entries = NULL;
67 while (entry) {
68 struct tree_entry_list *next = entry->next;
69 if (entry->directory)
70 mark_tree_uninteresting(entry->item.tree);
71 else
72 mark_blob_uninteresting(entry->item.blob);
73 free(entry);
74 entry = next;
75 }
76}
77void mark_parents_uninteresting(struct commit *commit)
79{
80 struct commit_list *parents = commit->parents;
81 while (parents) {
83 struct commit *commit = parents->item;
84 commit->object.flags |= UNINTERESTING;
85 /*
87 * Normally we haven't parsed the parent
88 * yet, so we won't have a parent of a parent
89 * here. However, it may turn out that we've
90 * reached this commit some other way (where it
91 * wasn't uninteresting), in which case we need
92 * to mark its parents recursively too..
93 */
94 if (commit->parents)
95 mark_parents_uninteresting(commit);
96 /*
98 * A missing commit is ok iff its parent is marked
99 * uninteresting.
100 *
101 * We just mark such a thing parsed, so that when
102 * it is popped next time around, we won't be trying
103 * to parse it and get an error.
104 */
105 if (!has_sha1_file(commit->object.sha1))
106 commit->object.parsed = 1;
107 parents = parents->next;
108 }
109}
110static void add_pending_object(struct rev_info *revs, struct object *obj, const char *name)
112{
113 add_object(obj, &revs->pending_objects, NULL, name);
114}
115static struct commit *get_commit_reference(struct rev_info *revs, const char *name, const unsigned char *sha1, unsigned int flags)
117{
118 struct object *object;
119 object = parse_object(sha1);
121 if (!object)
122 die("bad object %s", name);
123 /*
125 * Tag object? Look what it points to..
126 */
127 while (object->type == tag_type) {
128 struct tag *tag = (struct tag *) object;
129 object->flags |= flags;
130 if (revs->tag_objects && !(object->flags & UNINTERESTING))
131 add_pending_object(revs, object, tag->tag);
132 object = parse_object(tag->tagged->sha1);
133 if (!object)
134 die("bad object %s", sha1_to_hex(tag->tagged->sha1));
135 }
136 /*
138 * Commit object? Just return it, we'll do all the complex
139 * reachability crud.
140 */
141 if (object->type == commit_type) {
142 struct commit *commit = (struct commit *)object;
143 object->flags |= flags;
144 if (parse_commit(commit) < 0)
145 die("unable to parse commit %s", name);
146 if (flags & UNINTERESTING)
147 mark_parents_uninteresting(commit);
148 return commit;
149 }
150 /*
152 * Tree object? Either mark it uniniteresting, or add it
153 * to the list of objects to look at later..
154 */
155 if (object->type == tree_type) {
156 struct tree *tree = (struct tree *)object;
157 if (!revs->tree_objects)
158 return NULL;
159 if (flags & UNINTERESTING) {
160 mark_tree_uninteresting(tree);
161 return NULL;
162 }
163 add_pending_object(revs, object, "");
164 return NULL;
165 }
166 /*
168 * Blob object? You know the drill by now..
169 */
170 if (object->type == blob_type) {
171 struct blob *blob = (struct blob *)object;
172 if (!revs->blob_objects)
173 return NULL;
174 if (flags & UNINTERESTING) {
175 mark_blob_uninteresting(blob);
176 return NULL;
177 }
178 add_pending_object(revs, object, "");
179 return NULL;
180 }
181 die("%s is unknown object", name);
182}
183static void add_one_commit(struct commit *commit, struct rev_info *revs)
185{
186 if (!commit || (commit->object.flags & SEEN))
187 return;
188 commit->object.flags |= SEEN;
189 commit_list_insert(commit, &revs->commits);
190}
191static int all_flags;
193static struct rev_info *all_revs;
194static int handle_one_ref(const char *path, const unsigned char *sha1)
196{
197 struct commit *commit = get_commit_reference(all_revs, path, sha1, all_flags);
198 add_one_commit(commit, all_revs);
199 return 0;
200}
201static void handle_all(struct rev_info *revs, unsigned flags)
203{
204 all_revs = revs;
205 all_flags = flags;
206 for_each_ref(handle_one_ref);
207}
208/*
210 * Parse revision information, filling in the "rev_info" structure,
211 * and removing the used arguments from the argument list.
212 *
213 * Returns the number of arguments left ("new argc").
214 */
215int setup_revisions(int argc, const char **argv, struct rev_info *revs)
216{
217 int i, flags, seen_dashdash;
218 const char *def = NULL;
219 const char **unrecognized = argv+1;
220 int left = 1;
221 memset(revs, 0, sizeof(*revs));
223 revs->lifo = 1;
224 revs->dense = 1;
225 revs->prefix = setup_git_directory();
226 revs->max_age = -1;
227 revs->min_age = -1;
228 revs->max_count = -1;
229 /* First, search for "--" */
231 seen_dashdash = 0;
232 for (i = 1; i < argc; i++) {
233 const char *arg = argv[i];
234 if (strcmp(arg, "--"))
235 continue;
236 argv[i] = NULL;
237 argc = i;
238 revs->paths = get_pathspec(revs->prefix, argv + i + 1);
239 seen_dashdash = 1;
240 break;
241 }
242 flags = 0;
244 for (i = 1; i < argc; i++) {
245 struct commit *commit;
246 const char *arg = argv[i];
247 unsigned char sha1[20];
248 char *dotdot;
249 int local_flags;
250 if (*arg == '-') {
252 if (!strncmp(arg, "--max-count=", 12)) {
253 revs->max_count = atoi(arg + 12);
254 continue;
255 }
256 if (!strncmp(arg, "--max-age=", 10)) {
257 revs->max_age = atoi(arg + 10);
258 continue;
259 }
260 if (!strncmp(arg, "--min-age=", 10)) {
261 revs->min_age = atoi(arg + 10);
262 continue;
263 }
264 if (!strcmp(arg, "--all")) {
265 handle_all(revs, flags);
266 continue;
267 }
268 if (!strcmp(arg, "--not")) {
269 flags ^= UNINTERESTING;
270 continue;
271 }
272 if (!strcmp(arg, "--default")) {
273 if (++i >= argc)
274 die("bad --default argument");
275 def = argv[i];
276 continue;
277 }
278 if (!strcmp(arg, "--topo-order")) {
279 revs->topo_order = 1;
280 continue;
281 }
282 if (!strcmp(arg, "--date-order")) {
283 revs->lifo = 0;
284 revs->topo_order = 1;
285 continue;
286 }
287 if (!strcmp(arg, "--dense")) {
288 revs->dense = 1;
289 continue;
290 }
291 if (!strcmp(arg, "--sparse")) {
292 revs->dense = 0;
293 continue;
294 }
295 if (!strcmp(arg, "--remove-empty")) {
296 revs->remove_empty_trees = 1;
297 continue;
298 }
299 if (!strcmp(arg, "--objects")) {
300 revs->tag_objects = 1;
301 revs->tree_objects = 1;
302 revs->blob_objects = 1;
303 continue;
304 }
305 if (!strcmp(arg, "--objects-edge")) {
306 revs->tag_objects = 1;
307 revs->tree_objects = 1;
308 revs->blob_objects = 1;
309 revs->edge_hint = 1;
310 continue;
311 }
312 *unrecognized++ = arg;
313 left++;
314 continue;
315 }
316 dotdot = strstr(arg, "..");
317 if (dotdot) {
318 unsigned char from_sha1[20];
319 char *next = dotdot + 2;
320 *dotdot = 0;
321 if (!*next)
322 next = "HEAD";
323 if (!get_sha1(arg, from_sha1) && !get_sha1(next, sha1)) {
324 struct commit *exclude;
325 struct commit *include;
326 exclude = get_commit_reference(revs, arg, from_sha1, flags ^ UNINTERESTING);
328 include = get_commit_reference(revs, next, sha1, flags);
329 if (!exclude || !include)
330 die("Invalid revision range %s..%s", arg, next);
331 add_one_commit(exclude, revs);
332 add_one_commit(include, revs);
333 continue;
334 }
335 *dotdot = '.';
336 }
337 local_flags = 0;
338 if (*arg == '^') {
339 local_flags = UNINTERESTING;
340 arg++;
341 }
342 if (get_sha1(arg, sha1) < 0) {
343 struct stat st;
344 int j;
345 if (seen_dashdash || local_flags)
347 die("bad revision '%s'", arg);
348 /* If we didn't have a "--", all filenames must exist */
350 for (j = i; j < argc; j++) {
351 if (lstat(argv[j], &st) < 0)
352 die("'%s': %s", arg, strerror(errno));
353 }
354 revs->paths = get_pathspec(revs->prefix, argv + i);
355 break;
356 }
357 commit = get_commit_reference(revs, arg, sha1, flags ^ local_flags);
358 add_one_commit(commit, revs);
359 }
360 if (def && !revs->commits) {
361 unsigned char sha1[20];
362 struct commit *commit;
363 if (get_sha1(def, sha1) < 0)
364 die("bad default revision '%s'", def);
365 commit = get_commit_reference(revs, def, sha1, 0);
366 add_one_commit(commit, revs);
367 }
368 *unrecognized = NULL;
369 return left;
370}