revision.c: update show_object_with_name() without using malloc()
[git/git.git] / list-objects.c
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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
11static void process_blob(struct rev_info *revs,
12 struct blob *blob,
8d2dfc49 13 show_object_fn show,
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14 struct name_path *path,
15 const char *name)
16{
17 struct object *obj = &blob->object;
18
19 if (!revs->blob_objects)
20 return;
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21 if (!obj)
22 die("bad blob object");
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23 if (obj->flags & (UNINTERESTING | SEEN))
24 return;
25 obj->flags |= SEEN;
cf2ab916 26 show(obj, path, name);
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27}
28
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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 */
51static void process_gitlink(struct rev_info *revs,
52 const unsigned char *sha1,
8d2dfc49 53 show_object_fn show,
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54 struct name_path *path,
55 const char *name)
56{
57 /* Nothing to do */
58}
59
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60static void process_tree(struct rev_info *revs,
61 struct tree *tree,
8d2dfc49 62 show_object_fn show,
c64ed70d 63 struct name_path *path,
cc5fa2fd 64 struct strbuf *base,
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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;
97d0b74a 71 int match = revs->diffopt.pathspec.nr == 0 ? 2 : 0;
cc5fa2fd 72 int baselen = base->len;
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73
74 if (!revs->tree_objects)
75 return;
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76 if (!obj)
77 die("bad tree object");
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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;
cf2ab916 83 show(obj, path, name);
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84 me.up = path;
85 me.elem = name;
86 me.elem_len = strlen(name);
87
97d0b74a 88 if (!match) {
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89 strbuf_addstr(base, name);
90 if (base->len)
91 strbuf_addch(base, '/');
92 }
93
6fda5e51 94 init_tree_desc(&desc, tree->buffer, tree->size);
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95
96 while (tree_entry(&desc, &entry)) {
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97 if (match != 2) {
98 match = tree_entry_interesting(&entry, base, 0,
99 &revs->diffopt.pathspec);
100 if (match < 0)
cc5fa2fd 101 break;
97d0b74a 102 if (match == 0)
cc5fa2fd 103 continue;
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104 }
105
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106 if (S_ISDIR(entry.mode))
107 process_tree(revs,
108 lookup_tree(entry.sha1),
cc5fa2fd 109 show, &me, base, entry.path);
302b9282 110 else if (S_ISGITLINK(entry.mode))
6e2f441b 111 process_gitlink(revs, entry.sha1,
8d2dfc49 112 show, &me, entry.path);
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113 else
114 process_blob(revs,
115 lookup_blob(entry.sha1),
8d2dfc49 116 show, &me, entry.path);
c64ed70d 117 }
cc5fa2fd 118 strbuf_setlen(base, baselen);
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119 free(tree->buffer);
120 tree->buffer = NULL;
121}
122
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123static 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
141void 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
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156static void add_pending_tree(struct rev_info *revs, struct tree *tree)
157{
158 add_pending_object(revs, &tree->object, "");
159}
160
c64ed70d 161void traverse_commit_list(struct rev_info *revs,
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162 show_commit_fn show_commit,
163 show_object_fn show_object,
164 void *data)
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165{
166 int i;
167 struct commit *commit;
cc5fa2fd 168 struct strbuf base;
c64ed70d 169
cc5fa2fd 170 strbuf_init(&base, PATH_MAX);
c64ed70d 171 while ((commit = get_revision(revs)) != NULL) {
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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);
11c211fa 178 show_commit(commit, data);
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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;
cf2ab916 188 show_object(obj, NULL, name);
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189 continue;
190 }
191 if (obj->type == OBJ_TREE) {
8d2dfc49 192 process_tree(revs, (struct tree *)obj, show_object,
cc5fa2fd 193 NULL, &base, name);
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194 continue;
195 }
196 if (obj->type == OBJ_BLOB) {
8d2dfc49 197 process_blob(revs, (struct blob *)obj, show_object,
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198 NULL, name);
199 continue;
200 }
201 die("unknown pending object %s (%s)",
202 sha1_to_hex(obj->sha1), name);
203 }
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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 }
cc5fa2fd 210 strbuf_release(&base);
c64ed70d 211}