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authorJunio C Hamano <gitster@pobox.com>2013-09-20 19:36:12 (GMT)
committerJunio C Hamano <gitster@pobox.com>2013-09-20 19:36:12 (GMT)
commit9a86b899415c8a49cc33d6b43bcab8113ddca517 (patch)
tree75c5c99594fc6d20d6196860aa78cd46c733ea16 /builtin/update-ref.c
parent087350398e8b2c5d4b39f051b23a2e533f4d830b (diff)
parentc6268bc0082e340633b7a785e6c7761cd54063cc (diff)
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Merge branch 'bk/refs-multi-update'
Give "update-refs" a "--stdin" option to read multiple update requests and perform them in an all-or-none fashion. * bk/refs-multi-update: update-ref: add test cases covering --stdin signature update-ref: support multiple simultaneous updates refs: add update_refs for multiple simultaneous updates refs: add function to repack without multiple refs refs: factor delete_ref loose ref step into a helper refs: factor update_ref steps into helpers refs: report ref type from lock_any_ref_for_update reset: rename update_refs to reset_refs
Diffstat (limited to 'builtin/update-ref.c')
-rw-r--r--builtin/update-ref.c252
1 files changed, 251 insertions, 1 deletions
diff --git a/builtin/update-ref.c b/builtin/update-ref.c
index 7484d36..702e90d 100644
--- a/builtin/update-ref.c
+++ b/builtin/update-ref.c
@@ -2,23 +2,261 @@
#include "refs.h"
#include "builtin.h"
#include "parse-options.h"
+#include "quote.h"
+#include "argv-array.h"
static const char * const git_update_ref_usage[] = {
N_("git update-ref [options] -d <refname> [<oldval>]"),
N_("git update-ref [options] <refname> <newval> [<oldval>]"),
+ N_("git update-ref [options] --stdin [-z]"),
NULL
};
+static int updates_alloc;
+static int updates_count;
+static const struct ref_update **updates;
+
+static char line_termination = '\n';
+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;
+}
+
+static void update_store_ref_name(struct ref_update *update,
+ const char *ref_name)
+{
+ if (check_refname_format(ref_name, REFNAME_ALLOW_ONELEVEL))
+ die("invalid ref format: %s", ref_name);
+ update->ref_name = xstrdup(ref_name);
+}
+
+static void update_store_new_sha1(struct ref_update *update,
+ const char *newvalue)
+{
+ if (*newvalue && get_sha1(newvalue, update->new_sha1))
+ die("invalid new value for ref %s: %s",
+ update->ref_name, newvalue);
+}
+
+static void update_store_old_sha1(struct ref_update *update,
+ const char *oldvalue)
+{
+ if (*oldvalue && get_sha1(oldvalue, update->old_sha1))
+ die("invalid old value for ref %s: %s",
+ update->ref_name, oldvalue);
+
+ /* We have an old value if non-empty, or if empty without -z */
+ update->have_old = *oldvalue || line_termination;
+}
+
+static const char *parse_arg(const char *next, struct strbuf *arg)
+{
+ /* Parse SP-terminated, possibly C-quoted argument */
+ if (*next != '"')
+ while (*next && !isspace(*next))
+ strbuf_addch(arg, *next++);
+ else if (unquote_c_style(arg, next, &next))
+ die("badly quoted argument: %s", next);
+
+ /* Return position after the argument */
+ return next;
+}
+
+static const char *parse_first_arg(const char *next, struct strbuf *arg)
+{
+ /* Parse argument immediately after "command SP" */
+ strbuf_reset(arg);
+ if (line_termination) {
+ /* Without -z, use the next argument */
+ next = parse_arg(next, arg);
+ } else {
+ /* With -z, use rest of first NUL-terminated line */
+ strbuf_addstr(arg, next);
+ next = next + arg->len;
+ }
+ return next;
+}
+
+static const char *parse_next_arg(const char *next, struct strbuf *arg)
+{
+ /* Parse next SP-terminated or NUL-terminated argument, if any */
+ strbuf_reset(arg);
+ if (line_termination) {
+ /* Without -z, consume SP and use next argument */
+ if (!*next)
+ return NULL;
+ if (*next != ' ')
+ die("expected SP but got: %s", next);
+ next = parse_arg(next + 1, arg);
+ } else {
+ /* With -z, read the next NUL-terminated line */
+ if (*next)
+ die("expected NUL but got: %s", next);
+ if (strbuf_getline(arg, stdin, '\0') == EOF)
+ return NULL;
+ next = arg->buf + arg->len;
+ }
+ return next;
+}
+
+static void parse_cmd_update(const char *next)
+{
+ struct strbuf ref = STRBUF_INIT;
+ struct strbuf newvalue = STRBUF_INIT;
+ struct strbuf oldvalue = STRBUF_INIT;
+ struct ref_update *update;
+
+ update = update_alloc();
+
+ if ((next = parse_first_arg(next, &ref)) != NULL && ref.buf[0])
+ update_store_ref_name(update, ref.buf);
+ else
+ die("update line missing <ref>");
+
+ if ((next = parse_next_arg(next, &newvalue)) != NULL)
+ update_store_new_sha1(update, newvalue.buf);
+ else
+ die("update %s missing <newvalue>", ref.buf);
+
+ if ((next = parse_next_arg(next, &oldvalue)) != NULL)
+ update_store_old_sha1(update, oldvalue.buf);
+ else if(!line_termination)
+ die("update %s missing [<oldvalue>] NUL", ref.buf);
+
+ if (next && *next)
+ die("update %s has extra input: %s", ref.buf, next);
+}
+
+static void parse_cmd_create(const char *next)
+{
+ struct strbuf ref = STRBUF_INIT;
+ struct strbuf newvalue = STRBUF_INIT;
+ struct ref_update *update;
+
+ update = update_alloc();
+
+ if ((next = parse_first_arg(next, &ref)) != NULL && ref.buf[0])
+ update_store_ref_name(update, ref.buf);
+ else
+ die("create line missing <ref>");
+
+ if ((next = parse_next_arg(next, &newvalue)) != NULL)
+ update_store_new_sha1(update, newvalue.buf);
+ else
+ die("create %s missing <newvalue>", ref.buf);
+ if (is_null_sha1(update->new_sha1))
+ die("create %s given zero new value", ref.buf);
+
+ if (next && *next)
+ die("create %s has extra input: %s", ref.buf, next);
+}
+
+static void parse_cmd_delete(const char *next)
+{
+ struct strbuf ref = STRBUF_INIT;
+ struct strbuf oldvalue = STRBUF_INIT;
+ struct ref_update *update;
+
+ update = update_alloc();
+
+ if ((next = parse_first_arg(next, &ref)) != NULL && ref.buf[0])
+ update_store_ref_name(update, ref.buf);
+ else
+ die("delete line missing <ref>");
+
+ if ((next = parse_next_arg(next, &oldvalue)) != NULL)
+ update_store_old_sha1(update, oldvalue.buf);
+ else if(!line_termination)
+ die("delete %s missing [<oldvalue>] NUL", ref.buf);
+ if (update->have_old && is_null_sha1(update->old_sha1))
+ die("delete %s given zero old value", ref.buf);
+
+ if (next && *next)
+ die("delete %s has extra input: %s", ref.buf, next);
+}
+
+static void parse_cmd_verify(const char *next)
+{
+ struct strbuf ref = STRBUF_INIT;
+ struct strbuf value = STRBUF_INIT;
+ struct ref_update *update;
+
+ update = update_alloc();
+
+ if ((next = parse_first_arg(next, &ref)) != NULL && ref.buf[0])
+ update_store_ref_name(update, ref.buf);
+ else
+ die("verify line missing <ref>");
+
+ if ((next = parse_next_arg(next, &value)) != NULL) {
+ update_store_old_sha1(update, value.buf);
+ update_store_new_sha1(update, value.buf);
+ } else if(!line_termination)
+ die("verify %s missing [<oldvalue>] NUL", ref.buf);
+
+ if (next && *next)
+ die("verify %s has extra input: %s", ref.buf, next);
+}
+
+static void parse_cmd_option(const char *next)
+{
+ if (!strcmp(next, "no-deref"))
+ update_flags |= REF_NODEREF;
+ else
+ die("option unknown: %s", next);
+}
+
+static void update_refs_stdin(void)
+{
+ struct strbuf cmd = STRBUF_INIT;
+
+ /* Read each line dispatch its command */
+ while (strbuf_getline(&cmd, stdin, line_termination) != EOF)
+ if (!cmd.buf[0])
+ die("empty command in input");
+ else if (isspace(*cmd.buf))
+ die("whitespace before command: %s", cmd.buf);
+ else if (!prefixcmp(cmd.buf, "update "))
+ parse_cmd_update(cmd.buf + 7);
+ else if (!prefixcmp(cmd.buf, "create "))
+ parse_cmd_create(cmd.buf + 7);
+ else if (!prefixcmp(cmd.buf, "delete "))
+ parse_cmd_delete(cmd.buf + 7);
+ else if (!prefixcmp(cmd.buf, "verify "))
+ parse_cmd_verify(cmd.buf + 7);
+ else if (!prefixcmp(cmd.buf, "option "))
+ parse_cmd_option(cmd.buf + 7);
+ else
+ die("unknown command: %s", cmd.buf);
+
+ strbuf_release(&cmd);
+}
+
int cmd_update_ref(int argc, const char **argv, const char *prefix)
{
const char *refname, *oldval, *msg = NULL;
unsigned char sha1[20], oldsha1[20];
- int delete = 0, no_deref = 0, flags = 0;
+ int delete = 0, no_deref = 0, read_stdin = 0, end_null = 0, flags = 0;
struct option options[] = {
OPT_STRING( 'm', NULL, &msg, N_("reason"), N_("reason of the update")),
OPT_BOOL('d', NULL, &delete, N_("delete the reference")),
OPT_BOOL( 0 , "no-deref", &no_deref,
N_("update <refname> not the one it points to")),
+ OPT_BOOL('z', NULL, &end_null, N_("stdin has NUL-terminated arguments")),
+ OPT_BOOL( 0 , "stdin", &read_stdin, N_("read updates from stdin")),
OPT_END(),
};
@@ -28,6 +266,18 @@ int cmd_update_ref(int argc, const char **argv, const char *prefix)
if (msg && !*msg)
die("Refusing to perform update with empty message.");
+ if (read_stdin) {
+ if (delete || no_deref || argc > 0)
+ usage_with_options(git_update_ref_usage, options);
+ if (end_null)
+ line_termination = '\0';
+ update_refs_stdin();
+ return update_refs(msg, updates, updates_count, DIE_ON_ERR);
+ }
+
+ if (end_null)
+ usage_with_options(git_update_ref_usage, options);
+
if (delete) {
if (argc < 1 || argc > 2)
usage_with_options(git_update_ref_usage, options);