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 }