Merge branch 'tb/pretty-format-cd-date-format'
[git] / notes-utils.c
1 #include "cache.h"
2 #include "commit.h"
3 #include "refs.h"
4 #include "notes-utils.h"
5
6 void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
7                          const char *msg, size_t msg_len,
8                          unsigned char *result_sha1)
9 {
10         unsigned char tree_sha1[20];
11
12         assert(t->initialized);
13
14         if (write_notes_tree(t, tree_sha1))
15                 die("Failed to write notes tree to database");
16
17         if (!parents) {
18                 /* Deduce parent commit from t->ref */
19                 unsigned char parent_sha1[20];
20                 if (!read_ref(t->ref, parent_sha1)) {
21                         struct commit *parent = lookup_commit(parent_sha1);
22                         if (parse_commit(parent))
23                                 die("Failed to find/parse commit %s", t->ref);
24                         commit_list_insert(parent, &parents);
25                 }
26                 /* else: t->ref points to nothing, assume root/orphan commit */
27         }
28
29         if (commit_tree(msg, msg_len, tree_sha1, parents, result_sha1, NULL, NULL))
30                 die("Failed to commit notes tree to database");
31 }
32
33 void commit_notes(struct notes_tree *t, const char *msg)
34 {
35         struct strbuf buf = STRBUF_INIT;
36         unsigned char commit_sha1[20];
37
38         if (!t)
39                 t = &default_notes_tree;
40         if (!t->initialized || !t->ref || !*t->ref)
41                 die(_("Cannot commit uninitialized/unreferenced notes tree"));
42         if (!t->dirty)
43                 return; /* don't have to commit an unchanged tree */
44
45         /* Prepare commit message and reflog message */
46         strbuf_addstr(&buf, msg);
47         if (buf.buf[buf.len - 1] != '\n')
48                 strbuf_addch(&buf, '\n'); /* Make sure msg ends with newline */
49
50         create_notes_commit(t, NULL, buf.buf, buf.len, commit_sha1);
51         strbuf_insert(&buf, 0, "notes: ", 7); /* commit message starts at index 7 */
52         update_ref(buf.buf, t->ref, commit_sha1, NULL, 0,
53                    UPDATE_REFS_DIE_ON_ERR);
54
55         strbuf_release(&buf);
56 }
57
58 static combine_notes_fn parse_combine_notes_fn(const char *v)
59 {
60         if (!strcasecmp(v, "overwrite"))
61                 return combine_notes_overwrite;
62         else if (!strcasecmp(v, "ignore"))
63                 return combine_notes_ignore;
64         else if (!strcasecmp(v, "concatenate"))
65                 return combine_notes_concatenate;
66         else if (!strcasecmp(v, "cat_sort_uniq"))
67                 return combine_notes_cat_sort_uniq;
68         else
69                 return NULL;
70 }
71
72 static int notes_rewrite_config(const char *k, const char *v, void *cb)
73 {
74         struct notes_rewrite_cfg *c = cb;
75         if (starts_with(k, "notes.rewrite.") && !strcmp(k+14, c->cmd)) {
76                 c->enabled = git_config_bool(k, v);
77                 return 0;
78         } else if (!c->mode_from_env && !strcmp(k, "notes.rewritemode")) {
79                 if (!v)
80                         return config_error_nonbool(k);
81                 c->combine = parse_combine_notes_fn(v);
82                 if (!c->combine) {
83                         error(_("Bad notes.rewriteMode value: '%s'"), v);
84                         return 1;
85                 }
86                 return 0;
87         } else if (!c->refs_from_env && !strcmp(k, "notes.rewriteref")) {
88                 /* note that a refs/ prefix is implied in the
89                  * underlying for_each_glob_ref */
90                 if (starts_with(v, "refs/notes/"))
91                         string_list_add_refs_by_glob(c->refs, v);
92                 else
93                         warning(_("Refusing to rewrite notes in %s"
94                                 " (outside of refs/notes/)"), v);
95                 return 0;
96         }
97
98         return 0;
99 }
100
101
102 struct notes_rewrite_cfg *init_copy_notes_for_rewrite(const char *cmd)
103 {
104         struct notes_rewrite_cfg *c = xmalloc(sizeof(struct notes_rewrite_cfg));
105         const char *rewrite_mode_env = getenv(GIT_NOTES_REWRITE_MODE_ENVIRONMENT);
106         const char *rewrite_refs_env = getenv(GIT_NOTES_REWRITE_REF_ENVIRONMENT);
107         c->cmd = cmd;
108         c->enabled = 1;
109         c->combine = combine_notes_concatenate;
110         c->refs = xcalloc(1, sizeof(struct string_list));
111         c->refs->strdup_strings = 1;
112         c->refs_from_env = 0;
113         c->mode_from_env = 0;
114         if (rewrite_mode_env) {
115                 c->mode_from_env = 1;
116                 c->combine = parse_combine_notes_fn(rewrite_mode_env);
117                 if (!c->combine)
118                         /* TRANSLATORS: The first %s is the name of the
119                            environment variable, the second %s is its value */
120                         error(_("Bad %s value: '%s'"), GIT_NOTES_REWRITE_MODE_ENVIRONMENT,
121                                         rewrite_mode_env);
122         }
123         if (rewrite_refs_env) {
124                 c->refs_from_env = 1;
125                 string_list_add_refs_from_colon_sep(c->refs, rewrite_refs_env);
126         }
127         git_config(notes_rewrite_config, c);
128         if (!c->enabled || !c->refs->nr) {
129                 string_list_clear(c->refs, 0);
130                 free(c->refs);
131                 free(c);
132                 return NULL;
133         }
134         c->trees = load_notes_trees(c->refs);
135         string_list_clear(c->refs, 0);
136         free(c->refs);
137         return c;
138 }
139
140 int copy_note_for_rewrite(struct notes_rewrite_cfg *c,
141                           const unsigned char *from_obj, const unsigned char *to_obj)
142 {
143         int ret = 0;
144         int i;
145         for (i = 0; c->trees[i]; i++)
146                 ret = copy_note(c->trees[i], from_obj, to_obj, 1, c->combine) || ret;
147         return ret;
148 }
149
150 void finish_copy_notes_for_rewrite(struct notes_rewrite_cfg *c, const char *msg)
151 {
152         int i;
153         for (i = 0; c->trees[i]; i++) {
154                 commit_notes(c->trees[i], msg);
155                 free_notes(c->trees[i]);
156         }
157         free(c->trees);
158         free(c);
159 }