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-rw-r--r--notes-utils.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/notes-utils.c b/notes-utils.c
new file mode 100644
index 0000000000..9107c379d9
--- /dev/null
+++ b/notes-utils.c
@@ -0,0 +1,157 @@
+#include "cache.h"
+#include "commit.h"
+#include "refs.h"
+#include "notes-utils.h"
+
+void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
+ const struct strbuf *msg, unsigned char *result_sha1)
+{
+ unsigned char tree_sha1[20];
+
+ assert(t->initialized);
+
+ if (write_notes_tree(t, tree_sha1))
+ die("Failed to write notes tree to database");
+
+ if (!parents) {
+ /* Deduce parent commit from t->ref */
+ unsigned char parent_sha1[20];
+ if (!read_ref(t->ref, parent_sha1)) {
+ struct commit *parent = lookup_commit(parent_sha1);
+ if (!parent || parse_commit(parent))
+ die("Failed to find/parse commit %s", t->ref);
+ commit_list_insert(parent, &parents);
+ }
+ /* else: t->ref points to nothing, assume root/orphan commit */
+ }
+
+ if (commit_tree(msg, tree_sha1, parents, result_sha1, NULL, NULL))
+ die("Failed to commit notes tree to database");
+}
+
+void commit_notes(struct notes_tree *t, const char *msg)
+{
+ struct strbuf buf = STRBUF_INIT;
+ unsigned char commit_sha1[20];
+
+ if (!t)
+ t = &default_notes_tree;
+ if (!t->initialized || !t->ref || !*t->ref)
+ die(_("Cannot commit uninitialized/unreferenced notes tree"));
+ if (!t->dirty)
+ return; /* don't have to commit an unchanged tree */
+
+ /* Prepare commit message and reflog message */
+ strbuf_addstr(&buf, msg);
+ if (buf.buf[buf.len - 1] != '\n')
+ strbuf_addch(&buf, '\n'); /* Make sure msg ends with newline */
+
+ create_notes_commit(t, NULL, &buf, commit_sha1);
+ strbuf_insert(&buf, 0, "notes: ", 7); /* commit message starts at index 7 */
+ update_ref(buf.buf, t->ref, commit_sha1, NULL, 0, DIE_ON_ERR);
+
+ strbuf_release(&buf);
+}
+
+static combine_notes_fn parse_combine_notes_fn(const char *v)
+{
+ if (!strcasecmp(v, "overwrite"))
+ return combine_notes_overwrite;
+ else if (!strcasecmp(v, "ignore"))
+ return combine_notes_ignore;
+ else if (!strcasecmp(v, "concatenate"))
+ return combine_notes_concatenate;
+ else if (!strcasecmp(v, "cat_sort_uniq"))
+ return combine_notes_cat_sort_uniq;
+ else
+ return NULL;
+}
+
+static int notes_rewrite_config(const char *k, const char *v, void *cb)
+{
+ struct notes_rewrite_cfg *c = cb;
+ if (!prefixcmp(k, "notes.rewrite.") && !strcmp(k+14, c->cmd)) {
+ c->enabled = git_config_bool(k, v);
+ return 0;
+ } else if (!c->mode_from_env && !strcmp(k, "notes.rewritemode")) {
+ if (!v)
+ config_error_nonbool(k);
+ c->combine = parse_combine_notes_fn(v);
+ if (!c->combine) {
+ error(_("Bad notes.rewriteMode value: '%s'"), v);
+ return 1;
+ }
+ return 0;
+ } else if (!c->refs_from_env && !strcmp(k, "notes.rewriteref")) {
+ /* note that a refs/ prefix is implied in the
+ * underlying for_each_glob_ref */
+ if (!prefixcmp(v, "refs/notes/"))
+ string_list_add_refs_by_glob(c->refs, v);
+ else
+ warning(_("Refusing to rewrite notes in %s"
+ " (outside of refs/notes/)"), v);
+ return 0;
+ }
+
+ return 0;
+}
+
+
+struct notes_rewrite_cfg *init_copy_notes_for_rewrite(const char *cmd)
+{
+ struct notes_rewrite_cfg *c = xmalloc(sizeof(struct notes_rewrite_cfg));
+ const char *rewrite_mode_env = getenv(GIT_NOTES_REWRITE_MODE_ENVIRONMENT);
+ const char *rewrite_refs_env = getenv(GIT_NOTES_REWRITE_REF_ENVIRONMENT);
+ c->cmd = cmd;
+ c->enabled = 1;
+ c->combine = combine_notes_concatenate;
+ c->refs = xcalloc(1, sizeof(struct string_list));
+ c->refs->strdup_strings = 1;
+ c->refs_from_env = 0;
+ c->mode_from_env = 0;
+ if (rewrite_mode_env) {
+ c->mode_from_env = 1;
+ c->combine = parse_combine_notes_fn(rewrite_mode_env);
+ if (!c->combine)
+ /* TRANSLATORS: The first %s is the name of the
+ environment variable, the second %s is its value */
+ error(_("Bad %s value: '%s'"), GIT_NOTES_REWRITE_MODE_ENVIRONMENT,
+ rewrite_mode_env);
+ }
+ if (rewrite_refs_env) {
+ c->refs_from_env = 1;
+ string_list_add_refs_from_colon_sep(c->refs, rewrite_refs_env);
+ }
+ git_config(notes_rewrite_config, c);
+ if (!c->enabled || !c->refs->nr) {
+ string_list_clear(c->refs, 0);
+ free(c->refs);
+ free(c);
+ return NULL;
+ }
+ c->trees = load_notes_trees(c->refs);
+ string_list_clear(c->refs, 0);
+ free(c->refs);
+ return c;
+}
+
+int copy_note_for_rewrite(struct notes_rewrite_cfg *c,
+ const unsigned char *from_obj, const unsigned char *to_obj)
+{
+ int ret = 0;
+ int i;
+ for (i = 0; c->trees[i]; i++)
+ ret = copy_note(c->trees[i], from_obj, to_obj, 1, c->combine) || ret;
+ return ret;
+}
+
+void finish_copy_notes_for_rewrite(struct notes_rewrite_cfg *c, const char *msg)
+{
+ int i;
+ for (i = 0; c->trees[i]; i++) {
+ commit_notes(c->trees[i], msg);
+ free_notes(c->trees[i]);
+ }
+ free(c->trees);
+ free(c);
+}