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Commit | Line | Data |
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8f1d2e6f | 1 | #include "cache.h" |
af3785dc | 2 | #include "cache-tree.h" |
175785e5 DB |
3 | #include "tree.h" |
4 | #include "blob.h" | |
77675e2a DB |
5 | #include "commit.h" |
6 | #include "tag.h" | |
136f2e54 | 7 | #include "tree-walk.h" |
175785e5 DB |
8 | |
9 | const char *tree_type = "tree"; | |
10 | ||
af3785dc | 11 | static int read_one_entry_opt(const unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage, int opt) |
94537c78 | 12 | { |
3c5e8468 LT |
13 | int len; |
14 | unsigned int size; | |
15 | struct cache_entry *ce; | |
16 | ||
17 | if (S_ISDIR(mode)) | |
18 | return READ_TREE_RECURSIVE; | |
19 | ||
20 | len = strlen(pathname); | |
21 | size = cache_entry_size(baselen + len); | |
90321c10 | 22 | ce = xcalloc(1, size); |
94537c78 LT |
23 | |
24 | ce->ce_mode = create_ce_mode(mode); | |
25 | ce->ce_flags = create_ce_flags(baselen + len, stage); | |
26 | memcpy(ce->name, base, baselen); | |
27 | memcpy(ce->name + baselen, pathname, len+1); | |
e702496e | 28 | hashcpy(ce->sha1, sha1); |
af3785dc JH |
29 | return add_cache_entry(ce, opt); |
30 | } | |
31 | ||
671f0707 | 32 | static int read_one_entry(const unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage, void *context) |
af3785dc JH |
33 | { |
34 | return read_one_entry_opt(sha1, base, baselen, pathname, mode, stage, | |
35 | ADD_CACHE_OK_TO_ADD|ADD_CACHE_SKIP_DFCHECK); | |
36 | } | |
37 | ||
38 | /* | |
39 | * This is used when the caller knows there is no existing entries at | |
40 | * the stage that will conflict with the entry being added. | |
41 | */ | |
671f0707 | 42 | static int read_one_entry_quick(const unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage, void *context) |
af3785dc JH |
43 | { |
44 | return read_one_entry_opt(sha1, base, baselen, pathname, mode, stage, | |
45 | ADD_CACHE_JUST_APPEND); | |
94537c78 LT |
46 | } |
47 | ||
3e587635 | 48 | static int match_tree_entry(const char *base, int baselen, const char *path, unsigned int mode, const char **paths) |
0ca14a57 | 49 | { |
3e587635 | 50 | const char *match; |
0ca14a57 LT |
51 | int pathlen; |
52 | ||
53 | if (!paths) | |
54 | return 1; | |
55 | pathlen = strlen(path); | |
56 | while ((match = *paths++) != NULL) { | |
57 | int matchlen = strlen(match); | |
58 | ||
59 | if (baselen >= matchlen) { | |
60 | /* If it doesn't match, move along... */ | |
61 | if (strncmp(base, match, matchlen)) | |
62 | continue; | |
8092bfb6 JH |
63 | /* pathspecs match only at the directory boundaries */ |
64 | if (!matchlen || | |
65 | base[matchlen] == '/' || | |
66 | match[matchlen - 1] == '/') | |
67 | return 1; | |
68 | continue; | |
0ca14a57 LT |
69 | } |
70 | ||
71 | /* Does the base match? */ | |
72 | if (strncmp(base, match, baselen)) | |
73 | continue; | |
74 | ||
75 | match += baselen; | |
76 | matchlen -= baselen; | |
77 | ||
78 | if (pathlen > matchlen) | |
79 | continue; | |
80 | ||
81 | if (matchlen > pathlen) { | |
82 | if (match[pathlen] != '/') | |
83 | continue; | |
84 | if (!S_ISDIR(mode)) | |
85 | continue; | |
86 | } | |
87 | ||
88 | if (strncmp(path, match, pathlen)) | |
89 | continue; | |
3e587635 LT |
90 | |
91 | return 1; | |
0ca14a57 LT |
92 | } |
93 | return 0; | |
94 | } | |
95 | ||
521698b1 | 96 | int read_tree_recursive(struct tree *tree, |
3c5e8468 LT |
97 | const char *base, int baselen, |
98 | int stage, const char **match, | |
671f0707 | 99 | read_tree_fn_t fn, void *context) |
94537c78 | 100 | { |
0790a42a | 101 | struct tree_desc desc; |
4c068a98 | 102 | struct name_entry entry; |
0790a42a | 103 | |
521698b1 DB |
104 | if (parse_tree(tree)) |
105 | return -1; | |
0790a42a | 106 | |
6fda5e51 | 107 | init_tree_desc(&desc, tree->buffer, tree->size); |
0790a42a | 108 | |
4c068a98 LT |
109 | while (tree_entry(&desc, &entry)) { |
110 | if (!match_tree_entry(base, baselen, entry.path, entry.mode, match)) | |
0ca14a57 LT |
111 | continue; |
112 | ||
671f0707 | 113 | switch (fn(entry.sha1, base, baselen, entry.path, entry.mode, stage, context)) { |
3c5e8468 LT |
114 | case 0: |
115 | continue; | |
116 | case READ_TREE_RECURSIVE: | |
117 | break;; | |
118 | default: | |
119 | return -1; | |
120 | } | |
4c068a98 | 121 | if (S_ISDIR(entry.mode)) { |
94537c78 | 122 | int retval; |
1c9da46d | 123 | char *newbase; |
a8c40471 | 124 | unsigned int pathlen = tree_entry_len(entry.path, entry.sha1); |
94537c78 | 125 | |
a8c40471 | 126 | newbase = xmalloc(baselen + 1 + pathlen); |
94537c78 | 127 | memcpy(newbase, base, baselen); |
a8c40471 LT |
128 | memcpy(newbase + baselen, entry.path, pathlen); |
129 | newbase[baselen + pathlen] = '/'; | |
4c068a98 | 130 | retval = read_tree_recursive(lookup_tree(entry.sha1), |
94537c78 | 131 | newbase, |
a8c40471 | 132 | baselen + pathlen + 1, |
671f0707 | 133 | stage, match, fn, context); |
94537c78 LT |
134 | free(newbase); |
135 | if (retval) | |
136 | return -1; | |
137 | continue; | |
138 | } | |
94537c78 LT |
139 | } |
140 | return 0; | |
141 | } | |
142 | ||
af3785dc JH |
143 | static int cmp_cache_name_compare(const void *a_, const void *b_) |
144 | { | |
145 | const struct cache_entry *ce1, *ce2; | |
146 | ||
147 | ce1 = *((const struct cache_entry **)a_); | |
148 | ce2 = *((const struct cache_entry **)b_); | |
7a51ed66 LT |
149 | return cache_name_compare(ce1->name, ce1->ce_flags, |
150 | ce2->name, ce2->ce_flags); | |
af3785dc JH |
151 | } |
152 | ||
521698b1 | 153 | int read_tree(struct tree *tree, int stage, const char **match) |
94537c78 | 154 | { |
af3785dc JH |
155 | read_tree_fn_t fn = NULL; |
156 | int i, err; | |
157 | ||
158 | /* | |
159 | * Currently the only existing callers of this function all | |
160 | * call it with stage=1 and after making sure there is nothing | |
161 | * at that stage; we could always use read_one_entry_quick(). | |
162 | * | |
163 | * But when we decide to straighten out git-read-tree not to | |
164 | * use unpack_trees() in some cases, this will probably start | |
165 | * to matter. | |
166 | */ | |
167 | ||
168 | /* | |
169 | * See if we have cache entry at the stage. If so, | |
170 | * do it the original slow way, otherwise, append and then | |
171 | * sort at the end. | |
172 | */ | |
173 | for (i = 0; !fn && i < active_nr; i++) { | |
174 | struct cache_entry *ce = active_cache[i]; | |
175 | if (ce_stage(ce) == stage) | |
176 | fn = read_one_entry; | |
177 | } | |
178 | ||
179 | if (!fn) | |
180 | fn = read_one_entry_quick; | |
671f0707 | 181 | err = read_tree_recursive(tree, "", 0, stage, match, fn, NULL); |
af3785dc JH |
182 | if (fn == read_one_entry || err) |
183 | return err; | |
184 | ||
185 | /* | |
186 | * Sort the cache entry -- we need to nuke the cache tree, though. | |
187 | */ | |
188 | cache_tree_free(&active_cache_tree); | |
189 | qsort(active_cache, active_nr, sizeof(active_cache[0]), | |
190 | cmp_cache_name_compare); | |
191 | return 0; | |
94537c78 LT |
192 | } |
193 | ||
5d6ccf5c | 194 | struct tree *lookup_tree(const unsigned char *sha1) |
175785e5 DB |
195 | { |
196 | struct object *obj = lookup_object(sha1); | |
100c5f3b LT |
197 | if (!obj) |
198 | return create_object(sha1, OBJ_TREE, alloc_tree_node()); | |
d1af002d | 199 | if (!obj->type) |
1974632c LT |
200 | obj->type = OBJ_TREE; |
201 | if (obj->type != OBJ_TREE) { | |
885a86ab LT |
202 | error("Object %s is a %s, not a tree", |
203 | sha1_to_hex(sha1), typename(obj->type)); | |
175785e5 DB |
204 | return NULL; |
205 | } | |
206 | return (struct tree *) obj; | |
207 | } | |
208 | ||
2d9c58c6 LT |
209 | int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size) |
210 | { | |
175785e5 DB |
211 | if (item->object.parsed) |
212 | return 0; | |
213 | item->object.parsed = 1; | |
136f2e54 LT |
214 | item->buffer = buffer; |
215 | item->size = size; | |
216 | ||
2d9c58c6 LT |
217 | return 0; |
218 | } | |
219 | ||
bd2c39f5 NP |
220 | int parse_tree(struct tree *item) |
221 | { | |
21666f1a | 222 | enum object_type type; |
bd2c39f5 NP |
223 | void *buffer; |
224 | unsigned long size; | |
bd2c39f5 NP |
225 | |
226 | if (item->object.parsed) | |
227 | return 0; | |
21666f1a | 228 | buffer = read_sha1_file(item->object.sha1, &type, &size); |
bd2c39f5 NP |
229 | if (!buffer) |
230 | return error("Could not read %s", | |
231 | sha1_to_hex(item->object.sha1)); | |
21666f1a | 232 | if (type != OBJ_TREE) { |
bd2c39f5 NP |
233 | free(buffer); |
234 | return error("Object %s not a tree", | |
235 | sha1_to_hex(item->object.sha1)); | |
236 | } | |
136f2e54 | 237 | return parse_tree_buffer(item, buffer, size); |
bd2c39f5 | 238 | } |
77675e2a DB |
239 | |
240 | struct tree *parse_tree_indirect(const unsigned char *sha1) | |
241 | { | |
242 | struct object *obj = parse_object(sha1); | |
243 | do { | |
244 | if (!obj) | |
245 | return NULL; | |
1974632c | 246 | if (obj->type == OBJ_TREE) |
77675e2a | 247 | return (struct tree *) obj; |
1974632c | 248 | else if (obj->type == OBJ_COMMIT) |
77675e2a | 249 | obj = &(((struct commit *) obj)->tree->object); |
1974632c | 250 | else if (obj->type == OBJ_TAG) |
77675e2a DB |
251 | obj = ((struct tag *) obj)->tagged; |
252 | else | |
253 | return NULL; | |
254 | if (!obj->parsed) | |
255 | parse_object(obj->sha1); | |
256 | } while (1); | |
257 | } |