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         strbuf_complete_line(&buf);
  48
  49         create_notes_commit(t, NULL, buf.buf, buf.len, commit_sha1);
  50         strbuf_insert(&buf, 0, "notes: ", 7); /* commit message starts at index 7 */
  51         update_ref(buf.buf, t->ref, commit_sha1, NULL, 0,
  52                    UPDATE_REFS_DIE_ON_ERR);
  53
  54         strbuf_release(&buf);
  55 }
  56
  57 static combine_notes_fn parse_combine_notes_fn(const char *v)
  58 {
  59         if (!strcasecmp(v, "overwrite"))
  60                 return combine_notes_overwrite;
  61         else if (!strcasecmp(v, "ignore"))
  62                 return combine_notes_ignore;
  63         else if (!strcasecmp(v, "concatenate"))
  64                 return combine_notes_concatenate;
  65         else if (!strcasecmp(v, "cat_sort_uniq"))
  66                 return combine_notes_cat_sort_uniq;
  67         else
  68                 return NULL;
  69 }
  70
  71 static int notes_rewrite_config(const char *k, const char *v, void *cb)
  72 {
  73         struct notes_rewrite_cfg *c = cb;
  74         if (starts_with(k, "notes.rewrite.") && !strcmp(k+14, c->cmd)) {
  75                 c->enabled = git_config_bool(k, v);
  76                 return 0;
  77         } else if (!c->mode_from_env && !strcmp(k, "notes.rewritemode")) {
  78                 if (!v)
  79                         return config_error_nonbool(k);
  80                 c->combine = parse_combine_notes_fn(v);
  81                 if (!c->combine) {
  82                         error(_("Bad notes.rewriteMode value: '%s'"), v);
  83                         return 1;
  84                 }
  85                 return 0;
  86         } else if (!c->refs_from_env && !strcmp(k, "notes.rewriteref")) {
  87                 /* note that a refs/ prefix is implied in the
  88                  * underlying for_each_glob_ref */
  89                 if (starts_with(v, "refs/notes/"))
  90                         string_list_add_refs_by_glob(c->refs, v);
  91                 else
  92                         warning(_("Refusing to rewrite notes in %s"
  93                                 " (outside of refs/notes/)"), v);
  94                 return 0;
  95         }
  96
  97         return 0;
  98 }
  99
 100
 101 struct notes_rewrite_cfg *init_copy_notes_for_rewrite(const char *cmd)
 102 {
 103         struct notes_rewrite_cfg *c = xmalloc(sizeof(struct notes_rewrite_cfg));
 104         const char *rewrite_mode_env = getenv(GIT_NOTES_REWRITE_MODE_ENVIRONMENT);
 105         const char *rewrite_refs_env = getenv(GIT_NOTES_REWRITE_REF_ENVIRONMENT);
 106         c->cmd = cmd;
 107         c->enabled = 1;
 108         c->combine = combine_notes_concatenate;
 109         c->refs = xcalloc(1, sizeof(struct string_list));
 110         c->refs->strdup_strings = 1;
 111         c->refs_from_env = 0;
 112         c->mode_from_env = 0;
 113         if (rewrite_mode_env) {
 114                 c->mode_from_env = 1;
 115                 c->combine = parse_combine_notes_fn(rewrite_mode_env);
 116                 if (!c->combine)
 117                         /* TRANSLATORS: The first %s is the name of the
 118                            environment variable, the second %s is its value */
 119                         error(_("Bad %s value: '%s'"), GIT_NOTES_REWRITE_MODE_ENVIRONMENT,
 120                                         rewrite_mode_env);
 121         }
 122         if (rewrite_refs_env) {
 123                 c->refs_from_env = 1;
 124                 string_list_add_refs_from_colon_sep(c->refs, rewrite_refs_env);
 125         }
 126         git_config(notes_rewrite_config, c);
 127         if (!c->enabled || !c->refs->nr) {
 128                 string_list_clear(c->refs, 0);
 129                 free(c->refs);
 130                 free(c);
 131                 return NULL;
 132         }
 133         c->trees = load_notes_trees(c->refs);
 134         string_list_clear(c->refs, 0);
 135         free(c->refs);
 136         return c;
 137 }
 138
 139 int copy_note_for_rewrite(struct notes_rewrite_cfg *c,
 140                           const unsigned char *from_obj, const unsigned char *to_obj)
 141 {
 142         int ret = 0;
 143         int i;
 144         for (i = 0; c->trees[i]; i++)
 145                 ret = copy_note(c->trees[i], from_obj, to_obj, 1, c->combine) || ret;
 146         return ret;
 147 }
 148
 149 void finish_copy_notes_for_rewrite(struct notes_rewrite_cfg *c, const char *msg)
 150 {
 151         int i;
 152         for (i = 0; c->trees[i]; i++) {
 153                 commit_notes(c->trees[i], msg);
 154                 free_notes(c->trees[i]);
 155         }
 156         free(c->trees);
 157         free(c);
 158 }