* the argument. Die if C-quoting is malformed or the reference name
* is invalid.
*/
-static char *parse_refname(struct strbuf *input, const char **next)
+static char *parse_refname(const char **next)
{
struct strbuf ref = STRBUF_INIT;
* provided but cannot be converted to a SHA-1, die. flags can
* include PARSE_SHA1_OLD and/or PARSE_SHA1_ALLOW_EMPTY.
*/
-static int parse_next_oid(struct strbuf *input, const char **next,
+static int parse_next_oid(const char **next, const char *end,
struct object_id *oid,
const char *command, const char *refname,
int flags)
struct strbuf arg = STRBUF_INIT;
int ret = 0;
- if (*next == input->buf + input->len)
+ if (*next == end)
goto eof;
if (line_termination) {
die("%s %s: expected NUL but got: %s",
command, refname, *next);
(*next)++;
- if (*next == input->buf + input->len)
+ if (*next == end)
goto eof;
strbuf_addstr(&arg, *next);
*next += arg.len;
* depending on how line_termination is set.
*/
-static const char *parse_cmd_update(struct ref_transaction *transaction,
- struct strbuf *input, const char *next)
+static void parse_cmd_update(struct ref_transaction *transaction,
+ const char *next, const char *end)
{
struct strbuf err = STRBUF_INIT;
char *refname;
struct object_id new_oid, old_oid;
int have_old;
- refname = parse_refname(input, &next);
+ refname = parse_refname(&next);
if (!refname)
die("update: missing <ref>");
- if (parse_next_oid(input, &next, &new_oid, "update", refname,
+ if (parse_next_oid(&next, end, &new_oid, "update", refname,
PARSE_SHA1_ALLOW_EMPTY))
die("update %s: missing <newvalue>", refname);
- have_old = !parse_next_oid(input, &next, &old_oid, "update", refname,
+ have_old = !parse_next_oid(&next, end, &old_oid, "update", refname,
PARSE_SHA1_OLD);
if (*next != line_termination)
update_flags = default_flags;
free(refname);
strbuf_release(&err);
-
- return next;
}
-static const char *parse_cmd_create(struct ref_transaction *transaction,
- struct strbuf *input, const char *next)
+static void parse_cmd_create(struct ref_transaction *transaction,
+ const char *next, const char *end)
{
struct strbuf err = STRBUF_INIT;
char *refname;
struct object_id new_oid;
- refname = parse_refname(input, &next);
+ refname = parse_refname(&next);
if (!refname)
die("create: missing <ref>");
- if (parse_next_oid(input, &next, &new_oid, "create", refname, 0))
+ if (parse_next_oid(&next, end, &new_oid, "create", refname, 0))
die("create %s: missing <newvalue>", refname);
if (is_null_oid(&new_oid))
update_flags = default_flags;
free(refname);
strbuf_release(&err);
-
- return next;
}
-static const char *parse_cmd_delete(struct ref_transaction *transaction,
- struct strbuf *input, const char *next)
+static void parse_cmd_delete(struct ref_transaction *transaction,
+ const char *next, const char *end)
{
struct strbuf err = STRBUF_INIT;
char *refname;
struct object_id old_oid;
int have_old;
- refname = parse_refname(input, &next);
+ refname = parse_refname(&next);
if (!refname)
die("delete: missing <ref>");
- if (parse_next_oid(input, &next, &old_oid, "delete", refname,
+ if (parse_next_oid(&next, end, &old_oid, "delete", refname,
PARSE_SHA1_OLD)) {
have_old = 0;
} else {
update_flags = default_flags;
free(refname);
strbuf_release(&err);
-
- return next;
}
-static const char *parse_cmd_verify(struct ref_transaction *transaction,
- struct strbuf *input, const char *next)
+static void parse_cmd_verify(struct ref_transaction *transaction,
+ const char *next, const char *end)
{
struct strbuf err = STRBUF_INIT;
char *refname;
struct object_id old_oid;
- refname = parse_refname(input, &next);
+ refname = parse_refname(&next);
if (!refname)
die("verify: missing <ref>");
- if (parse_next_oid(input, &next, &old_oid, "verify", refname,
+ if (parse_next_oid(&next, end, &old_oid, "verify", refname,
PARSE_SHA1_OLD))
oidclr(&old_oid);
update_flags = default_flags;
free(refname);
strbuf_release(&err);
-
- return next;
}
-static const char *parse_cmd_option(struct strbuf *input, const char *next)
+static void parse_cmd_option(struct ref_transaction *transaction,
+ const char *next, const char *end)
{
const char *rest;
if (skip_prefix(next, "no-deref", &rest) && *rest == line_termination)
update_flags |= REF_NO_DEREF;
else
die("option unknown: %s", next);
- return rest;
}
-static void update_refs_stdin(struct ref_transaction *transaction)
+static void parse_cmd_start(struct ref_transaction *transaction,
+ const char *next, const char *end)
+{
+ if (*next != line_termination)
+ die("start: extra input: %s", next);
+ puts("start: ok");
+}
+
+static void parse_cmd_prepare(struct ref_transaction *transaction,
+ const char *next, const char *end)
+{
+ struct strbuf error = STRBUF_INIT;
+ if (*next != line_termination)
+ die("prepare: extra input: %s", next);
+ if (ref_transaction_prepare(transaction, &error))
+ die("prepare: %s", error.buf);
+ puts("prepare: ok");
+}
+
+static void parse_cmd_abort(struct ref_transaction *transaction,
+ const char *next, const char *end)
+{
+ struct strbuf error = STRBUF_INIT;
+ if (*next != line_termination)
+ die("abort: extra input: %s", next);
+ if (ref_transaction_abort(transaction, &error))
+ die("abort: %s", error.buf);
+ puts("abort: ok");
+}
+
+static void parse_cmd_commit(struct ref_transaction *transaction,
+ const char *next, const char *end)
+{
+ struct strbuf error = STRBUF_INIT;
+ if (*next != line_termination)
+ die("commit: extra input: %s", next);
+ if (ref_transaction_commit(transaction, &error))
+ die("commit: %s", error.buf);
+ puts("commit: ok");
+ ref_transaction_free(transaction);
+}
+
+enum update_refs_state {
+ /* Non-transactional state open for updates. */
+ UPDATE_REFS_OPEN,
+ /* A transaction has been started. */
+ UPDATE_REFS_STARTED,
+ /* References are locked and ready for commit */
+ UPDATE_REFS_PREPARED,
+ /* Transaction has been committed or closed. */
+ UPDATE_REFS_CLOSED,
+};
+
+static const struct parse_cmd {
+ const char *prefix;
+ void (*fn)(struct ref_transaction *, const char *, const char *);
+ unsigned args;
+ enum update_refs_state state;
+} command[] = {
+ { "update", parse_cmd_update, 3, UPDATE_REFS_OPEN },
+ { "create", parse_cmd_create, 2, UPDATE_REFS_OPEN },
+ { "delete", parse_cmd_delete, 2, UPDATE_REFS_OPEN },
+ { "verify", parse_cmd_verify, 2, UPDATE_REFS_OPEN },
+ { "option", parse_cmd_option, 1, UPDATE_REFS_OPEN },
+ { "start", parse_cmd_start, 0, UPDATE_REFS_STARTED },
+ { "prepare", parse_cmd_prepare, 0, UPDATE_REFS_PREPARED },
+ { "abort", parse_cmd_abort, 0, UPDATE_REFS_CLOSED },
+ { "commit", parse_cmd_commit, 0, UPDATE_REFS_CLOSED },
+};
+
+static void update_refs_stdin(void)
{
- struct strbuf input = STRBUF_INIT;
- const char *next;
+ struct strbuf input = STRBUF_INIT, err = STRBUF_INIT;
+ enum update_refs_state state = UPDATE_REFS_OPEN;
+ struct ref_transaction *transaction;
+ int i, j;
+
+ transaction = ref_transaction_begin(&err);
+ if (!transaction)
+ die("%s", err.buf);
- if (strbuf_read(&input, 0, 1000) < 0)
- die_errno("could not read from stdin");
- next = input.buf;
/* Read each line dispatch its command */
- while (next < input.buf + input.len) {
- if (*next == line_termination)
+ while (!strbuf_getwholeline(&input, stdin, line_termination)) {
+ const struct parse_cmd *cmd = NULL;
+
+ if (*input.buf == line_termination)
die("empty command in input");
- else if (isspace(*next))
- die("whitespace before command: %s", next);
- else if (skip_prefix(next, "update ", &next))
- next = parse_cmd_update(transaction, &input, next);
- else if (skip_prefix(next, "create ", &next))
- next = parse_cmd_create(transaction, &input, next);
- else if (skip_prefix(next, "delete ", &next))
- next = parse_cmd_delete(transaction, &input, next);
- else if (skip_prefix(next, "verify ", &next))
- next = parse_cmd_verify(transaction, &input, next);
- else if (skip_prefix(next, "option ", &next))
- next = parse_cmd_option(&input, next);
- else
- die("unknown command: %s", next);
-
- next++;
+ else if (isspace(*input.buf))
+ die("whitespace before command: %s", input.buf);
+
+ for (i = 0; i < ARRAY_SIZE(command); i++) {
+ const char *prefix = command[i].prefix;
+ char c;
+
+ if (!starts_with(input.buf, prefix))
+ continue;
+
+ /*
+ * If the command has arguments, verify that it's
+ * followed by a space. Otherwise, it shall be followed
+ * by a line terminator.
+ */
+ c = command[i].args ? ' ' : line_termination;
+ if (input.buf[strlen(prefix)] != c)
+ continue;
+
+ cmd = &command[i];
+ break;
+ }
+ if (!cmd)
+ die("unknown command: %s", input.buf);
+
+ /*
+ * Read additional arguments if NUL-terminated. Do not raise an
+ * error in case there is an early EOF to let the command
+ * handle missing arguments with a proper error message.
+ */
+ for (j = 1; line_termination == '\0' && j < cmd->args; j++)
+ if (strbuf_appendwholeline(&input, stdin, line_termination))
+ break;
+
+ switch (state) {
+ case UPDATE_REFS_OPEN:
+ case UPDATE_REFS_STARTED:
+ /* Do not downgrade a transaction to a non-transaction. */
+ if (cmd->state >= state)
+ state = cmd->state;
+ break;
+ case UPDATE_REFS_PREPARED:
+ if (cmd->state != UPDATE_REFS_CLOSED)
+ die("prepared transactions can only be closed");
+ state = cmd->state;
+ break;
+ case UPDATE_REFS_CLOSED:
+ die("transaction is closed");
+ break;
+ }
+
+ cmd->fn(transaction, input.buf + strlen(cmd->prefix) + !!cmd->args,
+ input.buf + input.len);
+ }
+
+ switch (state) {
+ case UPDATE_REFS_OPEN:
+ /* Commit by default if no transaction was requested. */
+ if (ref_transaction_commit(transaction, &err))
+ die("%s", err.buf);
+ ref_transaction_free(transaction);
+ break;
+ case UPDATE_REFS_STARTED:
+ case UPDATE_REFS_PREPARED:
+ /* If using a transaction, we want to abort it. */
+ if (ref_transaction_abort(transaction, &err))
+ die("%s", err.buf);
+ break;
+ case UPDATE_REFS_CLOSED:
+ /* Otherwise no need to do anything, the transaction was closed already. */
+ break;
}
+ strbuf_release(&err);
strbuf_release(&input);
}
}
if (read_stdin) {
- struct strbuf err = STRBUF_INIT;
- struct ref_transaction *transaction;
-
- transaction = ref_transaction_begin(&err);
- if (!transaction)
- die("%s", err.buf);
if (delete || argc > 0)
usage_with_options(git_update_ref_usage, options);
if (end_null)
line_termination = '\0';
- update_refs_stdin(transaction);
- if (ref_transaction_commit(transaction, &err))
- die("%s", err.buf);
- ref_transaction_free(transaction);
- strbuf_release(&err);
+ update_refs_stdin();
return 0;
}
projects / thirdparty / git.git / blobdiff