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{
17 struct object *obj = &blob->object;
18 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/*
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 */
51static 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}
59static void process_tree(struct rev_info *revs,
61 struct tree *tree,
62 show_object_fn show,
63 struct name_path *path,
64 const char *name)
65{
66 struct object *obj = &tree->object;
67 struct tree_desc desc;
68 struct name_entry entry;
69 struct name_path me;
70 if (!revs->tree_objects)
72 return;
73 if (!obj)
74 die("bad tree object");
75 if (obj->flags & (UNINTERESTING | SEEN))
76 return;
77 if (parse_tree(tree) < 0)
78 die("bad tree object %s", sha1_to_hex(obj->sha1));
79 obj->flags |= SEEN;
80 show(obj, path, name);
81 me.up = path;
82 me.elem = name;
83 me.elem_len = strlen(name);
84 init_tree_desc(&desc, tree->buffer, tree->size);
86 while (tree_entry(&desc, &entry)) {
88 if (S_ISDIR(entry.mode))
89 process_tree(revs,
90 lookup_tree(entry.sha1),
91 show, &me, entry.path);
92 else if (S_ISGITLINK(entry.mode))
93 process_gitlink(revs, entry.sha1,
94 show, &me, entry.path);
95 else
96 process_blob(revs,
97 lookup_blob(entry.sha1),
98 show, &me, entry.path);
99 }
100 free(tree->buffer);
101 tree->buffer = NULL;
102}
103static void mark_edge_parents_uninteresting(struct commit *commit,
105 struct rev_info *revs,
106 show_edge_fn show_edge)
107{
108 struct commit_list *parents;
109 for (parents = commit->parents; parents; parents = parents->next) {
111 struct commit *parent = parents->item;
112 if (!(parent->object.flags & UNINTERESTING))
113 continue;
114 mark_tree_uninteresting(parent->tree);
115 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
116 parent->object.flags |= SHOWN;
117 show_edge(parent);
118 }
119 }
120}
121void mark_edges_uninteresting(struct commit_list *list,
123 struct rev_info *revs,
124 show_edge_fn show_edge)
125{
126 for ( ; list; list = list->next) {
127 struct commit *commit = list->item;
128 if (commit->object.flags & UNINTERESTING) {
130 mark_tree_uninteresting(commit->tree);
131 continue;
132 }
133 mark_edge_parents_uninteresting(commit, revs, show_edge);
134 }
135}
136static void add_pending_tree(struct rev_info *revs, struct tree *tree)
138{
139 add_pending_object(revs, &tree->object, "");
140}
141void traverse_commit_list(struct rev_info *revs,
143 show_commit_fn show_commit,
144 show_object_fn show_object,
145 void *data)
146{
147 int i;
148 struct commit *commit;
149 while ((commit = get_revision(revs)) != NULL) {
151 add_pending_tree(revs, commit->tree);
152 show_commit(commit, data);
153 }
154 for (i = 0; i < revs->pending.nr; i++) {
155 struct object_array_entry *pending = revs->pending.objects + i;
156 struct object *obj = pending->item;
157 const char *name = pending->name;
158 if (obj->flags & (UNINTERESTING | SEEN))
159 continue;
160 if (obj->type == OBJ_TAG) {
161 obj->flags |= SEEN;
162 show_object(obj, NULL, name);
163 continue;
164 }
165 if (obj->type == OBJ_TREE) {
166 process_tree(revs, (struct tree *)obj, show_object,
167 NULL, name);
168 continue;
169 }
170 if (obj->type == OBJ_BLOB) {
171 process_blob(revs, (struct blob *)obj, show_object,
172 NULL, name);
173 continue;
174 }
175 die("unknown pending object %s (%s)",
176 sha1_to_hex(obj->sha1), name);
177 }
178 if (revs->pending.nr) {
179 free(revs->pending.objects);
180 revs->pending.nr = 0;
181 revs->pending.alloc = 0;
182 revs->pending.objects = NULL;
183 }
184}