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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>
This commit is contained in:
Johan Herland 2010-02-13 22:28:12 +01:00 committed by Junio C Hamano
parent 3b78cdbe69
commit 709f79b089
2 changed files with 38 additions and 12 deletions
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30
notes.c
View File

@ -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)

20
notes.h
View File

@ -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);