builtin-notes: Add "copy" subcommand for copying notes between objects

This is useful for keeping notes to objects that are being rewritten by e.g.
'git commit --amend', 'git rebase', or 'git cherry-pick'.

"git notes copy <from> <to>" is in practice equivalent to
"git notes add -C $(git notes list <from>) <to>", although it is somewhat
more convenient for regular users.

"git notes copy" takes the same -f option as "git add", to overwrite existing
notes at the target (instead of aborting with an error message).

If the <from>-object has no notes, "git notes copy" will abort with an error
message.

The patch includes tests verifying correct behaviour of the new subcommand.

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 22:28:38 +01:00 коммит произвёл Junio C Hamano
Родитель 5848769f9d
Коммит e73bbd96c6
3 изменённых файлов: 102 добавлений и 8 удалений

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@ -10,6 +10,7 @@ SYNOPSIS
[verse]
'git notes' [list [<object>]]
'git notes' add [-f] [-F <file> | -m <msg> | (-c | -C) <object>] [<object>]
'git notes' copy [-f] <from-object> <to-object>
'git notes' append [-F <file> | -m <msg> | (-c | -C) <object>] [<object>]
'git notes' edit [<object>]
'git notes' show [<object>]
@ -48,6 +49,13 @@ add::
object already has notes, abort. (use `-f` to overwrite an
existing note).
copy::
Copy the notes for the first object onto the second object.
Abort if the second object already has notes, or if the first
objects has none. (use -f to overwrite existing notes to the
second object). This subcommand is equivalent to:
`git notes add [-f] -C $(git notes list <from-object>) <to-object>`
append::
Append to the notes of an existing object (defaults to HEAD).
Creates a new notes object if needed.

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@ -20,6 +20,7 @@
static const char * const git_notes_usage[] = {
"git notes [list [<object>]]",
"git notes add [-f] [-m <msg> | -F <file> | (-c | -C) <object>] [<object>]",
"git notes copy [-f] <from-object> <to-object>",
"git notes append [-m <msg> | -F <file> | (-c | -C) <object>] [<object>]",
"git notes edit [<object>]",
"git notes show [<object>]",
@ -280,13 +281,13 @@ int commit_notes(struct notes_tree *t, const char *msg)
int cmd_notes(int argc, const char **argv, const char *prefix)
{
struct notes_tree *t;
unsigned char object[20], new_note[20];
unsigned char object[20], from_obj[20], new_note[20];
const unsigned char *note;
const char *object_ref;
char logmsg[100];
int list = 0, add = 0, append = 0, edit = 0, show = 0, remove = 0,
prune = 0, force = 0;
int list = 0, add = 0, copy = 0, append = 0, edit = 0, show = 0,
remove = 0, prune = 0, force = 0;
int given_object = 0, i = 1, retval = 0;
struct msg_arg msg = { 0, 0, STRBUF_INIT };
struct option options[] = {
@ -311,6 +312,8 @@ int cmd_notes(int argc, const char **argv, const char *prefix)
list = 1;
else if (argc && !strcmp(argv[0], "add"))
add = 1;
else if (argc && !strcmp(argv[0], "copy"))
copy = 1;
else if (argc && !strcmp(argv[0], "append"))
append = 1;
else if (argc && !strcmp(argv[0], "edit"))
@ -326,7 +329,7 @@ int cmd_notes(int argc, const char **argv, const char *prefix)
i = 0;
}
if (list + add + append + edit + show + remove + prune != 1)
if (list + add + copy + append + edit + show + remove + prune != 1)
usage_with_options(git_notes_usage, options);
if (msg.given && !(add || append || edit)) {
@ -341,11 +344,22 @@ int cmd_notes(int argc, const char **argv, const char *prefix)
"Please use 'git notes add -f -m/-F/-c/-C' instead.\n");
}
if (force && !add) {
if (force && !(add || copy)) {
error("cannot use -f option with %s subcommand.", argv[0]);
usage_with_options(git_notes_usage, options);
}
if (copy) {
const char *from_ref;
if (argc < 3) {
error("too few parameters");
usage_with_options(git_notes_usage, options);
}
from_ref = argv[i++];
if (get_sha1(from_ref, from_obj))
die("Failed to resolve '%s' as a valid ref.", from_ref);
}
given_object = argc > i;
object_ref = given_object ? argv[i++] : "HEAD";
@ -394,11 +408,11 @@ int cmd_notes(int argc, const char **argv, const char *prefix)
/* add/append/edit/remove/prune command */
if (add && note) {
if ((add || copy) && note) {
if (!force) {
error("Cannot add notes. Found existing notes for object"
error("Cannot %s notes. Found existing notes for object"
" %s. Use '-f' to overwrite existing notes",
sha1_to_hex(object));
argv[0], sha1_to_hex(object));
retval = 1;
goto end;
}
@ -416,6 +430,15 @@ int cmd_notes(int argc, const char **argv, const char *prefix)
hashclr(new_note);
prune_notes(t);
goto commit;
} else if (copy) {
const unsigned char *from_note = get_note(t, from_obj);
if (!from_note) {
error("Missing notes on source object %s. Cannot copy.",
sha1_to_hex(from_obj));
retval = 1;
goto end;
}
hashcpy(new_note, from_note);
} else
create_note(object, &msg, append, note, new_note);

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@ -581,4 +581,67 @@ test_expect_success 'append to note from other note with "git notes append -c"'
test_cmp expect actual
'
cat > expect << EOF
commit 6352c5e33dbcab725fe0579be16aa2ba8eb369be
Author: A U Thor <author@example.com>
Date: Thu Apr 7 15:23:13 2005 -0700
11th
Notes:
other note
$whitespace
yet another note
EOF
test_expect_success 'copy note with "git notes copy"' '
: > a11 &&
git add a11 &&
test_tick &&
git commit -m 11th &&
git notes copy HEAD^ HEAD &&
git log -1 > actual &&
test_cmp expect actual &&
test "$(git notes list HEAD)" = "$(git notes list HEAD^)"
'
test_expect_success 'prevent overwrite with "git notes copy"' '
test_must_fail git notes copy HEAD~2 HEAD &&
git log -1 > actual &&
test_cmp expect actual &&
test "$(git notes list HEAD)" = "$(git notes list HEAD^)"
'
cat > expect << EOF
commit 6352c5e33dbcab725fe0579be16aa2ba8eb369be
Author: A U Thor <author@example.com>
Date: Thu Apr 7 15:23:13 2005 -0700
11th
Notes:
yet another note
$whitespace
yet another note
EOF
test_expect_success 'allow overwrite with "git notes copy -f"' '
git notes copy -f HEAD~2 HEAD &&
git log -1 > actual &&
test_cmp expect actual &&
test "$(git notes list HEAD)" = "$(git notes list HEAD~2)"
'
test_expect_success 'cannot copy note from object without notes' '
: > a12 &&
git add a12 &&
test_tick &&
git commit -m 12th &&
: > a13 &&
git add a13 &&
test_tick &&
git commit -m 13th &&
test_must_fail git notes copy HEAD^ HEAD
'
test_done