mem-pool: add convenience functions for strdup and strndup
[git] / notes-utils.c
1 #include "cache.h"
2 #include "config.h"
3 #include "commit.h"
4 #include "refs.h"
5 #include "notes-utils.h"
6 #include "repository.h"
7
8 void create_notes_commit(struct repository *r,
9                          struct notes_tree *t,
10                          struct commit_list *parents,
11                          const char *msg, size_t msg_len,
12                          struct object_id *result_oid)
13 {
14         struct object_id tree_oid;
15
16         assert(t->initialized);
17
18         if (write_notes_tree(t, &tree_oid))
19                 die("Failed to write notes tree to database");
20
21         if (!parents) {
22                 /* Deduce parent commit from t->ref */
23                 struct object_id parent_oid;
24                 if (!read_ref(t->ref, &parent_oid)) {
25                         struct commit *parent = lookup_commit(r, &parent_oid);
26                         if (parse_commit(parent))
27                                 die("Failed to find/parse commit %s", t->ref);
28                         commit_list_insert(parent, &parents);
29                 }
30                 /* else: t->ref points to nothing, assume root/orphan commit */
31         }
32
33         if (commit_tree(msg, msg_len, &tree_oid, parents, result_oid, NULL,
34                         NULL))
35                 die("Failed to commit notes tree to database");
36 }
37
38 void commit_notes(struct repository *r, struct notes_tree *t, const char *msg)
39 {
40         struct strbuf buf = STRBUF_INIT;
41         struct object_id commit_oid;
42
43         if (!t)
44                 t = &default_notes_tree;
45         if (!t->initialized || !t->update_ref || !*t->update_ref)
46                 die(_("Cannot commit uninitialized/unreferenced notes tree"));
47         if (!t->dirty)
48                 return; /* don't have to commit an unchanged tree */
49
50         /* Prepare commit message and reflog message */
51         strbuf_addstr(&buf, msg);
52         strbuf_complete_line(&buf);
53
54         create_notes_commit(r, t, NULL, buf.buf, buf.len, &commit_oid);
55         strbuf_insertstr(&buf, 0, "notes: ");
56         update_ref(buf.buf, t->update_ref, &commit_oid, NULL, 0,
57                    UPDATE_REFS_DIE_ON_ERR);
58
59         strbuf_release(&buf);
60 }
61
62 int parse_notes_merge_strategy(const char *v, enum notes_merge_strategy *s)
63 {
64         if (!strcmp(v, "manual"))
65                 *s = NOTES_MERGE_RESOLVE_MANUAL;
66         else if (!strcmp(v, "ours"))
67                 *s = NOTES_MERGE_RESOLVE_OURS;
68         else if (!strcmp(v, "theirs"))
69                 *s = NOTES_MERGE_RESOLVE_THEIRS;
70         else if (!strcmp(v, "union"))
71                 *s = NOTES_MERGE_RESOLVE_UNION;
72         else if (!strcmp(v, "cat_sort_uniq"))
73                 *s = NOTES_MERGE_RESOLVE_CAT_SORT_UNIQ;
74         else
75                 return -1;
76
77         return 0;
78 }
79
80 static combine_notes_fn parse_combine_notes_fn(const char *v)
81 {
82         if (!strcasecmp(v, "overwrite"))
83                 return combine_notes_overwrite;
84         else if (!strcasecmp(v, "ignore"))
85                 return combine_notes_ignore;
86         else if (!strcasecmp(v, "concatenate"))
87                 return combine_notes_concatenate;
88         else if (!strcasecmp(v, "cat_sort_uniq"))
89                 return combine_notes_cat_sort_uniq;
90         else
91                 return NULL;
92 }
93
94 static int notes_rewrite_config(const char *k, const char *v, void *cb)
95 {
96         struct notes_rewrite_cfg *c = cb;
97         if (starts_with(k, "notes.rewrite.") && !strcmp(k+14, c->cmd)) {
98                 c->enabled = git_config_bool(k, v);
99                 return 0;
100         } else if (!c->mode_from_env && !strcmp(k, "notes.rewritemode")) {
101                 if (!v)
102                         return config_error_nonbool(k);
103                 c->combine = parse_combine_notes_fn(v);
104                 if (!c->combine) {
105                         error(_("Bad notes.rewriteMode value: '%s'"), v);
106                         return 1;
107                 }
108                 return 0;
109         } else if (!c->refs_from_env && !strcmp(k, "notes.rewriteref")) {
110                 /* note that a refs/ prefix is implied in the
111                  * underlying for_each_glob_ref */
112                 if (starts_with(v, "refs/notes/"))
113                         string_list_add_refs_by_glob(c->refs, v);
114                 else
115                         warning(_("Refusing to rewrite notes in %s"
116                                 " (outside of refs/notes/)"), v);
117                 return 0;
118         }
119
120         return 0;
121 }
122
123
124 struct notes_rewrite_cfg *init_copy_notes_for_rewrite(const char *cmd)
125 {
126         struct notes_rewrite_cfg *c = xmalloc(sizeof(struct notes_rewrite_cfg));
127         const char *rewrite_mode_env = getenv(GIT_NOTES_REWRITE_MODE_ENVIRONMENT);
128         const char *rewrite_refs_env = getenv(GIT_NOTES_REWRITE_REF_ENVIRONMENT);
129         c->cmd = cmd;
130         c->enabled = 1;
131         c->combine = combine_notes_concatenate;
132         c->refs = xcalloc(1, sizeof(struct string_list));
133         c->refs->strdup_strings = 1;
134         c->refs_from_env = 0;
135         c->mode_from_env = 0;
136         if (rewrite_mode_env) {
137                 c->mode_from_env = 1;
138                 c->combine = parse_combine_notes_fn(rewrite_mode_env);
139                 if (!c->combine)
140                         /*
141                          * TRANSLATORS: The first %s is the name of
142                          * the environment variable, the second %s is
143                          * its value.
144                          */
145                         error(_("Bad %s value: '%s'"), GIT_NOTES_REWRITE_MODE_ENVIRONMENT,
146                                         rewrite_mode_env);
147         }
148         if (rewrite_refs_env) {
149                 c->refs_from_env = 1;
150                 string_list_add_refs_from_colon_sep(c->refs, rewrite_refs_env);
151         }
152         git_config(notes_rewrite_config, c);
153         if (!c->enabled || !c->refs->nr) {
154                 string_list_clear(c->refs, 0);
155                 free(c->refs);
156                 free(c);
157                 return NULL;
158         }
159         c->trees = load_notes_trees(c->refs, NOTES_INIT_WRITABLE);
160         string_list_clear(c->refs, 0);
161         free(c->refs);
162         return c;
163 }
164
165 int copy_note_for_rewrite(struct notes_rewrite_cfg *c,
166                           const struct object_id *from_obj, const struct object_id *to_obj)
167 {
168         int ret = 0;
169         int i;
170         for (i = 0; c->trees[i]; i++)
171                 ret = copy_note(c->trees[i], from_obj, to_obj, 1, c->combine) || ret;
172         return ret;
173 }
174
175 void finish_copy_notes_for_rewrite(struct repository *r,
176                                    struct notes_rewrite_cfg *c,
177                                    const char *msg)
178 {
179         int i;
180         for (i = 0; c->trees[i]; i++) {
181                 commit_notes(r, c->trees[i], msg);
182                 free_notes(c->trees[i]);
183         }
184         free(c->trees);
185         free(c);
186 }