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
   7 void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
   8                          const char *msg, size_t msg_len,
   9                          unsigned char *result_sha1)
  10 {
  11         struct object_id tree_oid;
  12
  13         assert(t->initialized);
  14
  15         if (write_notes_tree(t, tree_oid.hash))
  16                 die("Failed to write notes tree to database");
  17
  18         if (!parents) {
  19                 /* Deduce parent commit from t->ref */
  20                 struct object_id parent_oid;
  21                 if (!read_ref(t->ref, parent_oid.hash)) {
  22                         struct commit *parent = lookup_commit(&parent_oid);
  23                         if (parse_commit(parent))
  24                                 die("Failed to find/parse commit %s", t->ref);
  25                         commit_list_insert(parent, &parents);
  26                 }
  27                 /* else: t->ref points to nothing, assume root/orphan commit */
  28         }
  29
  30         if (commit_tree(msg, msg_len, tree_oid.hash, parents, result_sha1, NULL, NULL))
  31                 die("Failed to commit notes tree to database");
  32 }
  33
  34 void commit_notes(struct notes_tree *t, const char *msg)
  35 {
  36         struct strbuf buf = STRBUF_INIT;
  37         struct object_id commit_oid;
  38
  39         if (!t)
  40                 t = &default_notes_tree;
  41         if (!t->initialized || !t->update_ref || !*t->update_ref)
  42                 die(_("Cannot commit uninitialized/unreferenced notes tree"));
  43         if (!t->dirty)
  44                 return; /* don't have to commit an unchanged tree */
  45
  46         /* Prepare commit message and reflog message */
  47         strbuf_addstr(&buf, msg);
  48         strbuf_complete_line(&buf);
  49
  50         create_notes_commit(t, NULL, buf.buf, buf.len, commit_oid.hash);
  51         strbuf_insert(&buf, 0, "notes: ", 7); /* commit message starts at index 7 */
  52         update_ref(buf.buf, t->update_ref, commit_oid.hash, NULL, 0,
  53                    UPDATE_REFS_DIE_ON_ERR);
  54
  55         strbuf_release(&buf);
  56 }
  57
  58 int parse_notes_merge_strategy(const char *v, enum notes_merge_strategy *s)
  59 {
  60         if (!strcmp(v, "manual"))
  61                 *s = NOTES_MERGE_RESOLVE_MANUAL;
  62         else if (!strcmp(v, "ours"))
  63                 *s = NOTES_MERGE_RESOLVE_OURS;
  64         else if (!strcmp(v, "theirs"))
  65                 *s = NOTES_MERGE_RESOLVE_THEIRS;
  66         else if (!strcmp(v, "union"))
  67                 *s = NOTES_MERGE_RESOLVE_UNION;
  68         else if (!strcmp(v, "cat_sort_uniq"))
  69                 *s = NOTES_MERGE_RESOLVE_CAT_SORT_UNIQ;
  70         else
  71                 return -1;
  72
  73         return 0;
  74 }
  75
  76 static combine_notes_fn parse_combine_notes_fn(const char *v)
  77 {
  78         if (!strcasecmp(v, "overwrite"))
  79                 return combine_notes_overwrite;
  80         else if (!strcasecmp(v, "ignore"))
  81                 return combine_notes_ignore;
  82         else if (!strcasecmp(v, "concatenate"))
  83                 return combine_notes_concatenate;
  84         else if (!strcasecmp(v, "cat_sort_uniq"))
  85                 return combine_notes_cat_sort_uniq;
  86         else
  87                 return NULL;
  88 }
  89
  90 static int notes_rewrite_config(const char *k, const char *v, void *cb)
  91 {
  92         struct notes_rewrite_cfg *c = cb;
  93         if (starts_with(k, "notes.rewrite.") && !strcmp(k+14, c->cmd)) {
  94                 c->enabled = git_config_bool(k, v);
  95                 return 0;
  96         } else if (!c->mode_from_env && !strcmp(k, "notes.rewritemode")) {
  97                 if (!v)
  98                         return config_error_nonbool(k);
  99                 c->combine = parse_combine_notes_fn(v);
 100                 if (!c->combine) {
 101                         error(_("Bad notes.rewriteMode value: '%s'"), v);
 102                         return 1;
 103                 }
 104                 return 0;
 105         } else if (!c->refs_from_env && !strcmp(k, "notes.rewriteref")) {
 106                 /* note that a refs/ prefix is implied in the
 107                  * underlying for_each_glob_ref */
 108                 if (starts_with(v, "refs/notes/"))
 109                         string_list_add_refs_by_glob(c->refs, v);
 110                 else
 111                         warning(_("Refusing to rewrite notes in %s"
 112                                 " (outside of refs/notes/)"), v);
 113                 return 0;
 114         }
 115
 116         return 0;
 117 }
 118
 119
 120 struct notes_rewrite_cfg *init_copy_notes_for_rewrite(const char *cmd)
 121 {
 122         struct notes_rewrite_cfg *c = xmalloc(sizeof(struct notes_rewrite_cfg));
 123         const char *rewrite_mode_env = getenv(GIT_NOTES_REWRITE_MODE_ENVIRONMENT);
 124         const char *rewrite_refs_env = getenv(GIT_NOTES_REWRITE_REF_ENVIRONMENT);
 125         c->cmd = cmd;
 126         c->enabled = 1;
 127         c->combine = combine_notes_concatenate;
 128         c->refs = xcalloc(1, sizeof(struct string_list));
 129         c->refs->strdup_strings = 1;
 130         c->refs_from_env = 0;
 131         c->mode_from_env = 0;
 132         if (rewrite_mode_env) {
 133                 c->mode_from_env = 1;
 134                 c->combine = parse_combine_notes_fn(rewrite_mode_env);
 135                 if (!c->combine)
 136                         /*
 137                          * TRANSLATORS: The first %s is the name of
 138                          * the environment variable, the second %s is
 139                          * its value.
 140                          */
 141                         error(_("Bad %s value: '%s'"), GIT_NOTES_REWRITE_MODE_ENVIRONMENT,
 142                                         rewrite_mode_env);
 143         }
 144         if (rewrite_refs_env) {
 145                 c->refs_from_env = 1;
 146                 string_list_add_refs_from_colon_sep(c->refs, rewrite_refs_env);
 147         }
 148         git_config(notes_rewrite_config, c);
 149         if (!c->enabled || !c->refs->nr) {
 150                 string_list_clear(c->refs, 0);
 151                 free(c->refs);
 152                 free(c);
 153                 return NULL;
 154         }
 155         c->trees = load_notes_trees(c->refs, NOTES_INIT_WRITABLE);
 156         string_list_clear(c->refs, 0);
 157         free(c->refs);
 158         return c;
 159 }
 160
 161 int copy_note_for_rewrite(struct notes_rewrite_cfg *c,
 162                           const struct object_id *from_obj, const struct object_id *to_obj)
 163 {
 164         int ret = 0;
 165         int i;
 166         for (i = 0; c->trees[i]; i++)
 167                 ret = copy_note(c->trees[i], from_obj, to_obj, 1, c->combine) || ret;
 168         return ret;
 169 }
 170
 171 void finish_copy_notes_for_rewrite(struct notes_rewrite_cfg *c, const char *msg)
 172 {
 173         int i;
 174         for (i = 0; c->trees[i]; i++) {
 175                 commit_notes(c->trees[i], msg);
 176                 free_notes(c->trees[i]);
 177         }
 178         free(c->trees);
 179         free(c);
 180 }