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