зеркало из https://github.com/microsoft/git.git
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
Junio C Hamano
Родитель
caa4046c4f
Коммит
aebfc13337
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@ -12,29 +12,11 @@ static const char * const git_update_ref_usage[] = {
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NULL
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};
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static int updates_alloc;
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static int updates_count;
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static struct ref_update **updates;
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static struct ref_transaction *transaction;
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static char line_termination = '\n';
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static int update_flags;
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static struct ref_update *update_alloc(void)
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{
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struct ref_update *update;
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/* Allocate and zero-init a struct ref_update */
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update = xcalloc(1, sizeof(*update));
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ALLOC_GROW(updates, updates_count + 1, updates_alloc);
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updates[updates_count++] = update;
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/* Store and reset accumulated options */
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update->flags = update_flags;
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update_flags = 0;
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return update;
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}
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/*
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* Parse one whitespace- or NUL-terminated, possibly C-quoted argument
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* and append the result to arg. Return a pointer to the terminator.
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@ -196,97 +178,119 @@ static int parse_next_sha1(struct strbuf *input, const char **next,
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static const char *parse_cmd_update(struct strbuf *input, const char *next)
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{
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struct ref_update *update;
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char *refname;
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unsigned char new_sha1[20];
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unsigned char old_sha1[20];
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int have_old;
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update = update_alloc();
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update->ref_name = parse_refname(input, &next);
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if (!update->ref_name)
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refname = parse_refname(input, &next);
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if (!refname)
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die("update: missing <ref>");
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if (parse_next_sha1(input, &next, update->new_sha1,
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"update", update->ref_name,
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if (parse_next_sha1(input, &next, new_sha1, "update", refname,
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PARSE_SHA1_ALLOW_EMPTY))
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die("update %s: missing <newvalue>", update->ref_name);
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die("update %s: missing <newvalue>", refname);
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update->have_old = !parse_next_sha1(input, &next, update->old_sha1,
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"update", update->ref_name,
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have_old = !parse_next_sha1(input, &next, old_sha1, "update", refname,
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PARSE_SHA1_OLD);
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if (*next != line_termination)
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die("update %s: extra input: %s", update->ref_name, next);
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die("update %s: extra input: %s", refname, next);
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ref_transaction_update(transaction, refname, new_sha1, old_sha1,
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update_flags, have_old);
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update_flags = 0;
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free(refname);
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return next;
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}
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static const char *parse_cmd_create(struct strbuf *input, const char *next)
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{
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struct ref_update *update;
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char *refname;
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unsigned char new_sha1[20];
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update = update_alloc();
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update->ref_name = parse_refname(input, &next);
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if (!update->ref_name)
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refname = parse_refname(input, &next);
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if (!refname)
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die("create: missing <ref>");
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if (parse_next_sha1(input, &next, update->new_sha1,
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"create", update->ref_name, 0))
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die("create %s: missing <newvalue>", update->ref_name);
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if (parse_next_sha1(input, &next, new_sha1, "create", refname, 0))
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die("create %s: missing <newvalue>", refname);
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if (is_null_sha1(update->new_sha1))
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die("create %s: zero <newvalue>", update->ref_name);
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if (is_null_sha1(new_sha1))
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die("create %s: zero <newvalue>", refname);
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if (*next != line_termination)
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die("create %s: extra input: %s", update->ref_name, next);
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die("create %s: extra input: %s", refname, next);
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ref_transaction_create(transaction, refname, new_sha1, update_flags);
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update_flags = 0;
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free(refname);
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return next;
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}
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static const char *parse_cmd_delete(struct strbuf *input, const char *next)
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{
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struct ref_update *update;
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char *refname;
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unsigned char old_sha1[20];
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int have_old;
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update = update_alloc();
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update->ref_name = parse_refname(input, &next);
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if (!update->ref_name)
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refname = parse_refname(input, &next);
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if (!refname)
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die("delete: missing <ref>");
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if (parse_next_sha1(input, &next, update->old_sha1,
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"delete", update->ref_name, PARSE_SHA1_OLD)) {
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update->have_old = 0;
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if (parse_next_sha1(input, &next, old_sha1, "delete", refname,
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PARSE_SHA1_OLD)) {
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have_old = 0;
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} else {
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if (is_null_sha1(update->old_sha1))
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die("delete %s: zero <oldvalue>", update->ref_name);
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update->have_old = 1;
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if (is_null_sha1(old_sha1))
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die("delete %s: zero <oldvalue>", refname);
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have_old = 1;
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}
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if (*next != line_termination)
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die("delete %s: extra input: %s", update->ref_name, next);
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die("delete %s: extra input: %s", refname, next);
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ref_transaction_delete(transaction, refname, old_sha1,
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update_flags, have_old);
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update_flags = 0;
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free(refname);
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return next;
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}
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static const char *parse_cmd_verify(struct strbuf *input, const char *next)
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{
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struct ref_update *update;
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char *refname;
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unsigned char new_sha1[20];
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unsigned char old_sha1[20];
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int have_old;
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update = update_alloc();
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update->ref_name = parse_refname(input, &next);
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if (!update->ref_name)
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refname = parse_refname(input, &next);
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if (!refname)
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die("verify: missing <ref>");
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if (parse_next_sha1(input, &next, update->old_sha1,
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"verify", update->ref_name, PARSE_SHA1_OLD)) {
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update->have_old = 0;
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if (parse_next_sha1(input, &next, old_sha1, "verify", refname,
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PARSE_SHA1_OLD)) {
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hashclr(new_sha1);
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have_old = 0;
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} else {
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hashcpy(update->new_sha1, update->old_sha1);
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update->have_old = 1;
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hashcpy(new_sha1, old_sha1);
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have_old = 1;
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}
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if (*next != line_termination)
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die("verify %s: extra input: %s", update->ref_name, next);
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die("verify %s: extra input: %s", refname, next);
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ref_transaction_update(transaction, refname, new_sha1, old_sha1,
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update_flags, have_old);
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update_flags = 0;
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free(refname);
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return next;
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}
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@ -355,13 +359,17 @@ int cmd_update_ref(int argc, const char **argv, const char *prefix)
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die("Refusing to perform update with empty message.");
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if (read_stdin) {
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int ret;
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transaction = ref_transaction_begin();
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if (delete || no_deref || argc > 0)
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usage_with_options(git_update_ref_usage, options);
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if (end_null)
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line_termination = '\0';
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update_refs_stdin();
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return update_refs(msg, updates, updates_count,
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ret = ref_transaction_commit(transaction, msg,
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UPDATE_REFS_DIE_ON_ERR);
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return ret;
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}
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if (end_null)
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