Merge branch 'cn/bom-in-gitignore'
[git] / list-objects.c
1 #include "cache.h"
2 #include "tag.h"
3 #include "commit.h"
4 #include "tree.h"
5 #include "blob.h"
6 #include "diff.h"
7 #include "tree-walk.h"
8 #include "revision.h"
9 #include "list-objects.h"
10
11 static void process_blob(struct rev_info *revs,
12                          struct blob *blob,
13                          show_object_fn show,
14                          struct name_path *path,
15                          const char *name,
16                          void *cb_data)
17 {
18         struct object *obj = &blob->object;
19
20         if (!revs->blob_objects)
21                 return;
22         if (!obj)
23                 die("bad blob object");
24         if (obj->flags & (UNINTERESTING | SEEN))
25                 return;
26         obj->flags |= SEEN;
27         show(obj, path, name, cb_data);
28 }
29
30 /*
31  * Processing a gitlink entry currently does nothing, since
32  * we do not recurse into the subproject.
33  *
34  * We *could* eventually add a flag that actually does that,
35  * which would involve:
36  *  - is the subproject actually checked out?
37  *  - if so, see if the subproject has already been added
38  *    to the alternates list, and add it if not.
39  *  - process the commit (or tag) the gitlink points to
40  *    recursively.
41  *
42  * However, it's unclear whether there is really ever any
43  * reason to see superprojects and subprojects as such a
44  * "unified" object pool (potentially resulting in a totally
45  * humongous pack - avoiding which was the whole point of
46  * having gitlinks in the first place!).
47  *
48  * So for now, there is just a note that we *could* follow
49  * the link, and how to do it. Whether it necessarily makes
50  * any sense what-so-ever to ever do that is another issue.
51  */
52 static void process_gitlink(struct rev_info *revs,
53                             const unsigned char *sha1,
54                             show_object_fn show,
55                             struct name_path *path,
56                             const char *name,
57                             void *cb_data)
58 {
59         /* Nothing to do */
60 }
61
62 static void process_tree(struct rev_info *revs,
63                          struct tree *tree,
64                          show_object_fn show,
65                          struct name_path *path,
66                          struct strbuf *base,
67                          const char *name,
68                          void *cb_data)
69 {
70         struct object *obj = &tree->object;
71         struct tree_desc desc;
72         struct name_entry entry;
73         struct name_path me;
74         enum interesting match = revs->diffopt.pathspec.nr == 0 ?
75                 all_entries_interesting: entry_not_interesting;
76         int baselen = base->len;
77
78         if (!revs->tree_objects)
79                 return;
80         if (!obj)
81                 die("bad tree object");
82         if (obj->flags & (UNINTERESTING | SEEN))
83                 return;
84         if (parse_tree(tree) < 0) {
85                 if (revs->ignore_missing_links)
86                         return;
87                 die("bad tree object %s", sha1_to_hex(obj->sha1));
88         }
89         obj->flags |= SEEN;
90         show(obj, path, name, cb_data);
91         me.up = path;
92         me.elem = name;
93         me.elem_len = strlen(name);
94
95         if (!match) {
96                 strbuf_addstr(base, name);
97                 if (base->len)
98                         strbuf_addch(base, '/');
99         }
100
101         init_tree_desc(&desc, tree->buffer, tree->size);
102
103         while (tree_entry(&desc, &entry)) {
104                 if (match != all_entries_interesting) {
105                         match = tree_entry_interesting(&entry, base, 0,
106                                                        &revs->diffopt.pathspec);
107                         if (match == all_entries_not_interesting)
108                                 break;
109                         if (match == entry_not_interesting)
110                                 continue;
111                 }
112
113                 if (S_ISDIR(entry.mode))
114                         process_tree(revs,
115                                      lookup_tree(entry.sha1),
116                                      show, &me, base, entry.path,
117                                      cb_data);
118                 else if (S_ISGITLINK(entry.mode))
119                         process_gitlink(revs, entry.sha1,
120                                         show, &me, entry.path,
121                                         cb_data);
122                 else
123                         process_blob(revs,
124                                      lookup_blob(entry.sha1),
125                                      show, &me, entry.path,
126                                      cb_data);
127         }
128         strbuf_setlen(base, baselen);
129         free_tree_buffer(tree);
130 }
131
132 static void mark_edge_parents_uninteresting(struct commit *commit,
133                                             struct rev_info *revs,
134                                             show_edge_fn show_edge)
135 {
136         struct commit_list *parents;
137
138         for (parents = commit->parents; parents; parents = parents->next) {
139                 struct commit *parent = parents->item;
140                 if (!(parent->object.flags & UNINTERESTING))
141                         continue;
142                 mark_tree_uninteresting(parent->tree);
143                 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
144                         parent->object.flags |= SHOWN;
145                         show_edge(parent);
146                 }
147         }
148 }
149
150 void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
151 {
152         struct commit_list *list;
153         int i;
154
155         for (list = revs->commits; list; list = list->next) {
156                 struct commit *commit = list->item;
157
158                 if (commit->object.flags & UNINTERESTING) {
159                         mark_tree_uninteresting(commit->tree);
160                         if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) {
161                                 commit->object.flags |= SHOWN;
162                                 show_edge(commit);
163                         }
164                         continue;
165                 }
166                 mark_edge_parents_uninteresting(commit, revs, show_edge);
167         }
168         if (revs->edge_hint_aggressive) {
169                 for (i = 0; i < revs->cmdline.nr; i++) {
170                         struct object *obj = revs->cmdline.rev[i].item;
171                         struct commit *commit = (struct commit *)obj;
172                         if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
173                                 continue;
174                         mark_tree_uninteresting(commit->tree);
175                         if (!(obj->flags & SHOWN)) {
176                                 obj->flags |= SHOWN;
177                                 show_edge(commit);
178                         }
179                 }
180         }
181 }
182
183 static void add_pending_tree(struct rev_info *revs, struct tree *tree)
184 {
185         add_pending_object(revs, &tree->object, "");
186 }
187
188 void traverse_commit_list(struct rev_info *revs,
189                           show_commit_fn show_commit,
190                           show_object_fn show_object,
191                           void *data)
192 {
193         int i;
194         struct commit *commit;
195         struct strbuf base;
196
197         strbuf_init(&base, PATH_MAX);
198         while ((commit = get_revision(revs)) != NULL) {
199                 /*
200                  * an uninteresting boundary commit may not have its tree
201                  * parsed yet, but we are not going to show them anyway
202                  */
203                 if (commit->tree)
204                         add_pending_tree(revs, commit->tree);
205                 show_commit(commit, data);
206         }
207         for (i = 0; i < revs->pending.nr; i++) {
208                 struct object_array_entry *pending = revs->pending.objects + i;
209                 struct object *obj = pending->item;
210                 const char *name = pending->name;
211                 const char *path = pending->path;
212                 if (obj->flags & (UNINTERESTING | SEEN))
213                         continue;
214                 if (obj->type == OBJ_TAG) {
215                         obj->flags |= SEEN;
216                         show_object(obj, NULL, name, data);
217                         continue;
218                 }
219                 if (!path)
220                         path = "";
221                 if (obj->type == OBJ_TREE) {
222                         process_tree(revs, (struct tree *)obj, show_object,
223                                      NULL, &base, path, data);
224                         continue;
225                 }
226                 if (obj->type == OBJ_BLOB) {
227                         process_blob(revs, (struct blob *)obj, show_object,
228                                      NULL, path, data);
229                         continue;
230                 }
231                 die("unknown pending object %s (%s)",
232                     sha1_to_hex(obj->sha1), name);
233         }
234         object_array_clear(&revs->pending);
235         strbuf_release(&base);
236 }