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 int match = revs->diffopt.pathspec.nr == 0 ? 2 : 0;
75 int baselen = base->len;
76 if (!revs->tree_objects)
78 return;
79 if (!obj)
80 die("bad tree object");
81 if (obj->flags & (UNINTERESTING | SEEN))
82 return;
83 if (parse_tree(tree) < 0)
84 die("bad tree object %s", sha1_to_hex(obj->sha1));
85 obj->flags |= SEEN;
86 show(obj, path, name, cb_data);
87 me.up = path;
88 me.elem = name;
89 me.elem_len = strlen(name);
90 if (!match) {
92 strbuf_addstr(base, name);
93 if (base->len)
94 strbuf_addch(base, '/');
95 }
96 init_tree_desc(&desc, tree->buffer, tree->size);
98 while (tree_entry(&desc, &entry)) {
100 if (match != 2) {
101 match = tree_entry_interesting(&entry, base, 0,
102 &revs->diffopt.pathspec);
103 if (match < 0)
104 break;
105 if (match == 0)
106 continue;
107 }
108 if (S_ISDIR(entry.mode))
110 process_tree(revs,
111 lookup_tree(entry.sha1),
112 show, &me, base, entry.path,
113 cb_data);
114 else if (S_ISGITLINK(entry.mode))
115 process_gitlink(revs, entry.sha1,
116 show, &me, entry.path,
117 cb_data);
118 else
119 process_blob(revs,
120 lookup_blob(entry.sha1),
121 show, &me, entry.path,
122 cb_data);
123 }
124 strbuf_setlen(base, baselen);
125 free(tree->buffer);
126 tree->buffer = NULL;
127}
128static void mark_edge_parents_uninteresting(struct commit *commit,
130 struct rev_info *revs,
131 show_edge_fn show_edge)
132{
133 struct commit_list *parents;
134 for (parents = commit->parents; parents; parents = parents->next) {
136 struct commit *parent = parents->item;
137 if (!(parent->object.flags & UNINTERESTING))
138 continue;
139 mark_tree_uninteresting(parent->tree);
140 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
141 parent->object.flags |= SHOWN;
142 show_edge(parent);
143 }
144 }
145}
146void mark_edges_uninteresting(struct commit_list *list,
148 struct rev_info *revs,
149 show_edge_fn show_edge)
150{
151 for ( ; list; list = list->next) {
152 struct commit *commit = list->item;
153 if (commit->object.flags & UNINTERESTING) {
155 mark_tree_uninteresting(commit->tree);
156 continue;
157 }
158 mark_edge_parents_uninteresting(commit, revs, show_edge);
159 }
160}
161static void add_pending_tree(struct rev_info *revs, struct tree *tree)
163{
164 add_pending_object(revs, &tree->object, "");
165}
166void traverse_commit_list(struct rev_info *revs,
168 show_commit_fn show_commit,
169 show_object_fn show_object,
170 void *data)
171{
172 int i;
173 struct commit *commit;
174 struct strbuf base;
175 strbuf_init(&base, PATH_MAX);
177 while ((commit = get_revision(revs)) != NULL) {
178 /*
179 * an uninteresting boundary commit may not have its tree
180 * parsed yet, but we are not going to show them anyway
181 */
182 if (commit->tree)
183 add_pending_tree(revs, commit->tree);
184 show_commit(commit, data);
185 }
186 for (i = 0; i < revs->pending.nr; i++) {
187 struct object_array_entry *pending = revs->pending.objects + i;
188 struct object *obj = pending->item;
189 const char *name = pending->name;
190 if (obj->flags & (UNINTERESTING | SEEN))
191 continue;
192 if (obj->type == OBJ_TAG) {
193 obj->flags |= SEEN;
194 show_object(obj, NULL, name, data);
195 continue;
196 }
197 if (obj->type == OBJ_TREE) {
198 process_tree(revs, (struct tree *)obj, show_object,
199 NULL, &base, name, data);
200 continue;
201 }
202 if (obj->type == OBJ_BLOB) {
203 process_blob(revs, (struct blob *)obj, show_object,
204 NULL, name, data);
205 continue;
206 }
207 die("unknown pending object %s (%s)",
208 sha1_to_hex(obj->sha1), name);
209 }
210 if (revs->pending.nr) {
211 free(revs->pending.objects);
212 revs->pending.nr = 0;
213 revs->pending.alloc = 0;
214 revs->pending.objects = NULL;
215 }
216 strbuf_release(&base);
217}