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