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authorJohan Herland <johan@herland.net>2010-02-13 22:28:12 +0100
committerJunio C Hamano <gitster@pobox.com>2010-02-13 19:36:11 -0800
commit709f79b0894859a6624e99b3a0c4714dd4ece494 (patch)
tree4a754bd844286503f3ee1a93a9e3e7691c6870ae
parent3b78cdbe693092a58d9724deb14bd7be0dd4d7b3 (diff)
downloadgit-709f79b0894859a6624e99b3a0c4714dd4ece494.tar.gz
Notes API: init_notes(): Initialize the notes tree from the given notes ref
Created by a simple refactoring of initialize_notes(). Also add a new 'flags' parameter, which is a bitwise combination of notes initialization flags. For now, there is only one flag - NOTES_INIT_EMPTY - which indicates that the notes tree should not auto-load the contents of the given (or default) notes ref, but rather should leave the notes tree initialized to an empty state. This will become useful in the future when manipulating the notes tree through the notes API. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--notes.c30
-rw-r--r--notes.h20
2 files changed, 38 insertions, 12 deletions
diff --git a/notes.c b/notes.c
index 4ee4fec233..3f4ae35340 100644
--- a/notes.c
+++ b/notes.c
@@ -340,15 +340,28 @@ static void load_subtree(struct leaf_node *subtree, struct int_node *node,
free(buf);
}
-static void initialize_notes(const char *notes_ref_name)
+void init_notes(const char *notes_ref, int flags)
{
unsigned char sha1[20], object_sha1[20];
unsigned mode;
struct leaf_node root_tree;
- if (!notes_ref_name || read_ref(notes_ref_name, object_sha1) ||
- get_tree_entry(object_sha1, "", sha1, &mode))
+ assert(!initialized);
+ initialized = 1;
+
+ if (!notes_ref)
+ notes_ref = getenv(GIT_NOTES_REF_ENVIRONMENT);
+ if (!notes_ref)
+ notes_ref = notes_ref_name; /* value of core.notesRef config */
+ if (!notes_ref)
+ notes_ref = GIT_NOTES_DEFAULT_REF;
+
+ if (flags & NOTES_INIT_EMPTY || !notes_ref ||
+ read_ref(notes_ref, object_sha1))
return;
+ if (get_tree_entry(object_sha1, "", sha1, &mode))
+ die("Failed to read notes tree referenced by %s (%s)",
+ notes_ref, object_sha1);
hashclr(root_tree.key_sha1);
hashcpy(root_tree.val_sha1, sha1);
@@ -379,15 +392,8 @@ void format_note(const unsigned char *object_sha1, struct strbuf *sb,
unsigned long linelen, msglen;
enum object_type type;
- if (!initialized) {
- const char *env = getenv(GIT_NOTES_REF_ENVIRONMENT);
- if (env)
- notes_ref_name = getenv(GIT_NOTES_REF_ENVIRONMENT);
- else if (!notes_ref_name)
- notes_ref_name = GIT_NOTES_DEFAULT_REF;
- initialize_notes(notes_ref_name);
- initialized = 1;
- }
+ if (!initialized)
+ init_notes(NULL, 0);
sha1 = lookup_notes(object_sha1);
if (!sha1)
diff --git a/notes.h b/notes.h
index d745ed12da..6b527991b0 100644
--- a/notes.h
+++ b/notes.h
@@ -1,6 +1,26 @@
#ifndef NOTES_H
#define NOTES_H
+/*
+ * Flags controlling behaviour of notes tree initialization
+ *
+ * Default behaviour is to initialize the notes tree from the tree object
+ * specified by the given (or default) notes ref.
+ */
+#define NOTES_INIT_EMPTY 1
+
+/*
+ * Initialize internal notes tree structure with the notes tree at the given
+ * ref. If given ref is NULL, the value of the $GIT_NOTES_REF environment
+ * variable is used, and if that is missing, the default notes ref is used
+ * ("refs/notes/commits").
+ *
+ * If you need to re-intialize the internal notes tree structure (e.g. loading
+ * from a different notes ref), please first de-initialize the current notes
+ * tree by calling free_notes().
+ */
+void init_notes(const char *notes_ref, int flags);
+
/* Free (and de-initialize) the internal notes tree structure */
void free_notes(void);