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"
10static 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 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/*
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 */
52static 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}
61static 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 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 die("bad tree object %s", sha1_to_hex(obj->sha1));
86 obj->flags |= SEEN;
87 show(obj, path, name, cb_data);
88 me.up = path;
89 me.elem = name;
90 me.elem_len = strlen(name);
91 if (!match) {
93 strbuf_addstr(base, name);
94 if (base->len)
95 strbuf_addch(base, '/');
96 }
97 init_tree_desc(&desc, tree->buffer, tree->size);
99 while (tree_entry(&desc, &entry)) {
101 if (match != all_entries_interesting) {
102 match = tree_entry_interesting(&entry, base, 0,
103 &revs->diffopt.pathspec);
104 if (match == all_entries_not_interesting)
105 break;
106 if (match == entry_not_interesting)
107 continue;
108 }
109 if (S_ISDIR(entry.mode))
111 process_tree(revs,
112 lookup_tree(entry.sha1),
113 show, &me, base, entry.path,
114 cb_data);
115 else if (S_ISGITLINK(entry.mode))
116 process_gitlink(revs, entry.sha1,
117 show, &me, entry.path,
118 cb_data);
119 else
120 process_blob(revs,
121 lookup_blob(entry.sha1),
122 show, &me, entry.path,
123 cb_data);
124 }
125 strbuf_setlen(base, baselen);
126 free(tree->buffer);
127 tree->buffer = NULL;
128}
129static void mark_edge_parents_uninteresting(struct commit *commit,
131 struct rev_info *revs,
132 show_edge_fn show_edge)
133{
134 struct commit_list *parents;
135 for (parents = commit->parents; parents; parents = parents->next) {
137 struct commit *parent = parents->item;
138 if (!(parent->object.flags & UNINTERESTING))
139 continue;
140 mark_tree_uninteresting(parent->tree);
141 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
142 parent->object.flags |= SHOWN;
143 show_edge(parent);
144 }
145 }
146}
147void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
149{
150 struct commit_list *list;
151 int i;
152 for (list = revs->commits; list; list = list->next) {
154 struct commit *commit = list->item;
155 if (commit->object.flags & UNINTERESTING) {
157 mark_tree_uninteresting(commit->tree);
158 if (revs->edge_hint && !(commit->object.flags & SHOWN)) {
159 commit->object.flags |= SHOWN;
160 show_edge(commit);
161 }
162 continue;
163 }
164 mark_edge_parents_uninteresting(commit, revs, show_edge);
165 }
166 for (i = 0; i < revs->cmdline.nr; i++) {
167 struct object *obj = revs->cmdline.rev[i].item;
168 struct commit *commit = (struct commit *)obj;
169 if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
170 continue;
171 mark_tree_uninteresting(commit->tree);
172 if (revs->edge_hint && !(obj->flags & SHOWN)) {
173 obj->flags |= SHOWN;
174 show_edge(commit);
175 }
176 }
177}
178static void add_pending_tree(struct rev_info *revs, struct tree *tree)
180{
181 add_pending_object(revs, &tree->object, "");
182}
183void traverse_commit_list(struct rev_info *revs,
185 show_commit_fn show_commit,
186 show_object_fn show_object,
187 void *data)
188{
189 int i;
190 struct commit *commit;
191 struct strbuf base;
192 strbuf_init(&base, PATH_MAX);
194 while ((commit = get_revision(revs)) != NULL) {
195 /*
196 * an uninteresting boundary commit may not have its tree
197 * parsed yet, but we are not going to show them anyway
198 */
199 if (commit->tree)
200 add_pending_tree(revs, commit->tree);
201 show_commit(commit, data);
202 }
203 for (i = 0; i < revs->pending.nr; i++) {
204 struct object_array_entry *pending = revs->pending.objects + i;
205 struct object *obj = pending->item;
206 const char *name = pending->name;
207 if (obj->flags & (UNINTERESTING | SEEN))
208 continue;
209 if (obj->type == OBJ_TAG) {
210 obj->flags |= SEEN;
211 show_object(obj, NULL, name, data);
212 continue;
213 }
214 if (obj->type == OBJ_TREE) {
215 process_tree(revs, (struct tree *)obj, show_object,
216 NULL, &base, name, data);
217 continue;
218 }
219 if (obj->type == OBJ_BLOB) {
220 process_blob(revs, (struct blob *)obj, show_object,
221 NULL, name, data);
222 continue;
223 }
224 die("unknown pending object %s (%s)",
225 sha1_to_hex(obj->sha1), name);
226 }
227 if (revs->pending.nr) {
228 free(revs->pending.objects);
229 revs->pending.nr = 0;
230 revs->pending.alloc = 0;
231 revs->pending.objects = NULL;
232 }
233 strbuf_release(&base);
234}