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update-ref --stdin: reimplement using reference transactions 

This change is mostly clerical: the parse_cmd_*() functions need to
use local variables rather than a struct ref_update to collect the
arguments needed for each update, and then call ref_transaction_*() to
queue the change rather than building up the list of changes at the
caller side.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael Haggerty 2014-04-07 15:48:11 +02:00 коммит произвёл Junio C Hamano
Родитель caa4046c4f
Коммит aebfc13337
1 изменённых файлов: 75 добавлений и 67 удалений
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142
builtin/update-ref.c
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@ -12,29 +12,11 @@ static const char * const git_update_ref_usage[] = {
NULL NULL
}; };
static int updates_alloc; static struct ref_transaction *transaction;
static int updates_count;
static struct ref_update **updates;
static char line_termination = '\n'; static char line_termination = '\n';
static int update_flags; static int update_flags;
static struct ref_update *update_alloc(void)
{
struct ref_update *update;
/* Allocate and zero-init a struct ref_update */
update = xcalloc(1, sizeof(*update));
ALLOC_GROW(updates, updates_count + 1, updates_alloc);
updates[updates_count++] = update;
/* Store and reset accumulated options */
update->flags = update_flags;
update_flags = 0;
return update;
}
/* /*
* Parse one whitespace- or NUL-terminated, possibly C-quoted argument * Parse one whitespace- or NUL-terminated, possibly C-quoted argument
* and append the result to arg. Return a pointer to the terminator. * and append the result to arg. Return a pointer to the terminator.
@ -196,97 +178,119 @@ static int parse_next_sha1(struct strbuf *input, const char **next,
static const char *parse_cmd_update(struct strbuf *input, const char *next) static const char *parse_cmd_update(struct strbuf *input, const char *next)
{ {
struct ref_update *update; char *refname;
unsigned char new_sha1[20];
unsigned char old_sha1[20];
int have_old;
update = update_alloc(); refname = parse_refname(input, &next);
if (!refname)
update->ref_name = parse_refname(input, &next);
if (!update->ref_name)
die("update: missing <ref>"); die("update: missing <ref>");
if (parse_next_sha1(input, &next, update->new_sha1, if (parse_next_sha1(input, &next, new_sha1, "update", refname,
"update", update->ref_name,
PARSE_SHA1_ALLOW_EMPTY)) PARSE_SHA1_ALLOW_EMPTY))
die("update %s: missing <newvalue>", update->ref_name); die("update %s: missing <newvalue>", refname);
update->have_old = !parse_next_sha1(input, &next, update->old_sha1, have_old = !parse_next_sha1(input, &next, old_sha1, "update", refname,
"update", update->ref_name, PARSE_SHA1_OLD);
PARSE_SHA1_OLD);
if (*next != line_termination) if (*next != line_termination)
die("update %s: extra input: %s", update->ref_name, next); die("update %s: extra input: %s", refname, next);
ref_transaction_update(transaction, refname, new_sha1, old_sha1,
update_flags, have_old);
update_flags = 0;
free(refname);
return next; return next;
} }
static const char *parse_cmd_create(struct strbuf *input, const char *next) static const char *parse_cmd_create(struct strbuf *input, const char *next)
{ {
struct ref_update *update; char *refname;
unsigned char new_sha1[20];
update = update_alloc(); refname = parse_refname(input, &next);
if (!refname)
update->ref_name = parse_refname(input, &next);
if (!update->ref_name)
die("create: missing <ref>"); die("create: missing <ref>");
if (parse_next_sha1(input, &next, update->new_sha1, if (parse_next_sha1(input, &next, new_sha1, "create", refname, 0))
"create", update->ref_name, 0)) die("create %s: missing <newvalue>", refname);
die("create %s: missing <newvalue>", update->ref_name);
if (is_null_sha1(update->new_sha1)) if (is_null_sha1(new_sha1))
die("create %s: zero <newvalue>", update->ref_name); die("create %s: zero <newvalue>", refname);
if (*next != line_termination) if (*next != line_termination)
die("create %s: extra input: %s", update->ref_name, next); die("create %s: extra input: %s", refname, next);
ref_transaction_create(transaction, refname, new_sha1, update_flags);
update_flags = 0;
free(refname);
return next; return next;
} }
static const char *parse_cmd_delete(struct strbuf *input, const char *next) static const char *parse_cmd_delete(struct strbuf *input, const char *next)
{ {
struct ref_update *update; char *refname;
unsigned char old_sha1[20];
int have_old;
update = update_alloc(); refname = parse_refname(input, &next);
if (!refname)
update->ref_name = parse_refname(input, &next);
if (!update->ref_name)
die("delete: missing <ref>"); die("delete: missing <ref>");
if (parse_next_sha1(input, &next, update->old_sha1, if (parse_next_sha1(input, &next, old_sha1, "delete", refname,
"delete", update->ref_name, PARSE_SHA1_OLD)) { PARSE_SHA1_OLD)) {
update->have_old = 0; have_old = 0;
} else { } else {
if (is_null_sha1(update->old_sha1)) if (is_null_sha1(old_sha1))
die("delete %s: zero <oldvalue>", update->ref_name); die("delete %s: zero <oldvalue>", refname);
update->have_old = 1; have_old = 1;
} }
if (*next != line_termination) if (*next != line_termination)
die("delete %s: extra input: %s", update->ref_name, next); die("delete %s: extra input: %s", refname, next);
ref_transaction_delete(transaction, refname, old_sha1,
update_flags, have_old);
update_flags = 0;
free(refname);
return next; return next;
} }
static const char *parse_cmd_verify(struct strbuf *input, const char *next) static const char *parse_cmd_verify(struct strbuf *input, const char *next)
{ {
struct ref_update *update; char *refname;
unsigned char new_sha1[20];
unsigned char old_sha1[20];
int have_old;
update = update_alloc(); refname = parse_refname(input, &next);
if (!refname)
update->ref_name = parse_refname(input, &next);
if (!update->ref_name)
die("verify: missing <ref>"); die("verify: missing <ref>");
if (parse_next_sha1(input, &next, update->old_sha1, if (parse_next_sha1(input, &next, old_sha1, "verify", refname,
"verify", update->ref_name, PARSE_SHA1_OLD)) { PARSE_SHA1_OLD)) {
update->have_old = 0; hashclr(new_sha1);
have_old = 0;
} else { } else {
hashcpy(update->new_sha1, update->old_sha1); hashcpy(new_sha1, old_sha1);
update->have_old = 1; have_old = 1;
} }
if (*next != line_termination) if (*next != line_termination)
die("verify %s: extra input: %s", update->ref_name, next); die("verify %s: extra input: %s", refname, next);
ref_transaction_update(transaction, refname, new_sha1, old_sha1,
update_flags, have_old);
update_flags = 0;
free(refname);
return next; return next;
} }
@ -355,13 +359,17 @@ int cmd_update_ref(int argc, const char **argv, const char *prefix)
die("Refusing to perform update with empty message."); die("Refusing to perform update with empty message.");
if (read_stdin) { if (read_stdin) {
int ret;
transaction = ref_transaction_begin();
if (delete || no_deref || argc > 0) if (delete || no_deref || argc > 0)
usage_with_options(git_update_ref_usage, options); usage_with_options(git_update_ref_usage, options);
if (end_null) if (end_null)
line_termination = '\0'; line_termination = '\0';
update_refs_stdin(); update_refs_stdin();
return update_refs(msg, updates, updates_count, ret = ref_transaction_commit(transaction, msg,
UPDATE_REFS_DIE_ON_ERR); UPDATE_REFS_DIE_ON_ERR);
return ret;
} }
if (end_null) if (end_null)