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 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 if (!match) {
96 strbuf_addstr(base, name);
97 if (base->len)
98 strbuf_addch(base, '/');
99 }
100 init_tree_desc(&desc, tree->buffer, tree->size);
102 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 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}
131static 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 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}
149void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
151{
152 struct commit_list *list;
153 int i;
154 for (list = revs->commits; list; list = list->next) {
156 struct commit *commit = list->item;
157 if (commit->object.flags & UNINTERESTING) {
159 mark_tree_uninteresting(commit->tree);
160 if (revs->edge_hint && !(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) {
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}
182static void add_pending_tree(struct rev_info *revs, struct tree *tree)
184{
185 add_pending_object(revs, &tree->object, "");
186}
187void 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 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}