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-rw-r--r--Makefile2
-rw-r--r--builtin/fetch.c70
-rw-r--r--builtin/receive-pack.c43
-rw-r--r--connected.c62
-rw-r--r--connected.h20
5 files changed, 141 insertions, 56 deletions
diff --git a/Makefile b/Makefile
index 68201dea78..741aac424f 100644
--- a/Makefile
+++ b/Makefile
@@ -516,6 +516,7 @@ LIB_H += compat/win32/pthread.h
LIB_H += compat/win32/syslog.h
LIB_H += compat/win32/sys/poll.h
LIB_H += compat/win32/dirent.h
+LIB_H += connected.h
LIB_H += csum-file.h
LIB_H += decorate.h
LIB_H += delta.h
@@ -596,6 +597,7 @@ LIB_OBJS += commit.o
LIB_OBJS += compat/obstack.o
LIB_OBJS += config.o
LIB_OBJS += connect.o
+LIB_OBJS += connected.o
LIB_OBJS += convert.o
LIB_OBJS += copy.o
LIB_OBJS += csum-file.o
diff --git a/builtin/fetch.c b/builtin/fetch.c
index ead8c9d5c3..7a4e41cca7 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -13,6 +13,7 @@
#include "sigchain.h"
#include "transport.h"
#include "submodule.h"
+#include "connected.h"
static const char * const builtin_fetch_usage[] = {
"git fetch [<options>] [<repository> [<refspec>...]]",
@@ -345,62 +346,16 @@ static int update_local_ref(struct ref *ref,
}
}
-/*
- * The ref_map records the tips of the refs we are fetching. If
- *
- * $ git rev-list --verify-objects --stdin --not --all
- *
- * (feeding all the refs in ref_map on its standard input) does not
- * error out, that means everything reachable from these updated refs
- * locally exists and is connected to some of our existing refs.
- *
- * Returns 0 if everything is connected, non-zero otherwise.
- */
-static int check_everything_connected(struct ref *ref_map, int quiet)
+static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
{
- struct child_process rev_list;
- const char *argv[] = {"rev-list", "--verify-objects",
- "--stdin", "--not", "--all", NULL, NULL};
- char commit[41];
- struct ref *ref;
- int err = 0;
-
- if (!ref_map)
- return 0;
-
- if (quiet)
- argv[5] = "--quiet";
-
- memset(&rev_list, 0, sizeof(rev_list));
- rev_list.argv = argv;
- rev_list.git_cmd = 1;
- rev_list.in = -1;
- rev_list.no_stdout = 1;
- rev_list.no_stderr = quiet;
- if (start_command(&rev_list))
- return error(_("Could not run 'git rev-list'"));
-
- sigchain_push(SIGPIPE, SIG_IGN);
-
- memcpy(commit + 40, "\n", 2);
- for (ref = ref_map; ref; ref = ref->next) {
- memcpy(commit, sha1_to_hex(ref->old_sha1), 40);
- if (write_in_full(rev_list.in, commit, 41) < 0) {
- if (errno != EPIPE && errno != EINVAL)
- error(_("failed write to rev-list: %s"),
- strerror(errno));
- err = -1;
- break;
- }
- }
- if (close(rev_list.in)) {
- error(_("failed to close rev-list's stdin: %s"), strerror(errno));
- err = -1;
- }
-
- sigchain_pop(SIGPIPE);
+ struct ref **rm = cb_data;
+ struct ref *ref = *rm;
- return finish_command(&rev_list) || err;
+ if (!ref)
+ return -1; /* end of the list */
+ *rm = ref->next;
+ hashcpy(sha1, ref->old_sha1);
+ return 0;
}
static int store_updated_refs(const char *raw_url, const char *remote_name,
@@ -423,7 +378,8 @@ static int store_updated_refs(const char *raw_url, const char *remote_name,
else
url = xstrdup("foreign");
- if (check_everything_connected(ref_map, 0))
+ rm = ref_map;
+ if (check_everything_connected(iterate_ref_map, 0, &rm))
return error(_("%s did not send all necessary objects\n"), url);
for (rm = ref_map; rm; rm = rm->next) {
@@ -522,6 +478,8 @@ static int store_updated_refs(const char *raw_url, const char *remote_name,
*/
static int quickfetch(struct ref *ref_map)
{
+ struct ref *rm = ref_map;
+
/*
* If we are deepening a shallow clone we already have these
* objects reachable. Running rev-list here will return with
@@ -531,7 +489,7 @@ static int quickfetch(struct ref *ref_map)
*/
if (depth)
return -1;
- return check_everything_connected(ref_map, 1);
+ return check_everything_connected(iterate_ref_map, 1, &rm);
}
static int fetch_refs(struct transport *transport, struct ref *ref_map)
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index 4cc03065bf..9b56be3cc6 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -11,6 +11,7 @@
#include "transport.h"
#include "string-list.h"
#include "sha1-array.h"
+#include "connected.h"
static const char receive_pack_usage[] = "git receive-pack <git-dir>";
@@ -585,6 +586,43 @@ static void check_aliased_updates(struct command *commands)
string_list_clear(&ref_list, 0);
}
+static int command_singleton_iterator(void *cb_data, unsigned char sha1[20])
+{
+ struct command **cmd_list = cb_data;
+ struct command *cmd = *cmd_list;
+
+ if (!cmd)
+ return -1; /* end of list */
+ *cmd_list = NULL; /* this returns only one */
+ hashcpy(sha1, cmd->new_sha1);
+ return 0;
+}
+
+static void set_connectivity_errors(struct command *commands)
+{
+ struct command *cmd;
+
+ for (cmd = commands; cmd; cmd = cmd->next) {
+ struct command *singleton = cmd;
+ if (!check_everything_connected(command_singleton_iterator,
+ 0, &singleton))
+ continue;
+ cmd->error_string = "missing necessary objects";
+ }
+}
+
+static int iterate_receive_command_list(void *cb_data, unsigned char sha1[20])
+{
+ struct command **cmd_list = cb_data;
+ struct command *cmd = *cmd_list;
+
+ if (!cmd)
+ return -1; /* end of list */
+ *cmd_list = cmd->next;
+ hashcpy(sha1, cmd->new_sha1);
+ return 0;
+}
+
static void execute_commands(struct command *commands, const char *unpacker_error)
{
struct command *cmd;
@@ -596,6 +634,11 @@ static void execute_commands(struct command *commands, const char *unpacker_erro
return;
}
+ cmd = commands;
+ if (check_everything_connected(iterate_receive_command_list,
+ 0, &cmd))
+ set_connectivity_errors(commands);
+
if (run_receive_hook(commands, pre_receive_hook)) {
for (cmd = commands; cmd; cmd = cmd->next)
cmd->error_string = "pre-receive hook declined";
diff --git a/connected.c b/connected.c
new file mode 100644
index 0000000000..d7624230d4
--- /dev/null
+++ b/connected.c
@@ -0,0 +1,62 @@
+#include "cache.h"
+#include "run-command.h"
+#include "sigchain.h"
+#include "connected.h"
+
+/*
+ * If we feed all the commits we want to verify to this command
+ *
+ * $ git rev-list --verify-objects --stdin --not --all
+ *
+ * and if it does not error out, that means everything reachable from
+ * these commits locally exists and is connected to some of our
+ * existing refs.
+ *
+ * Returns 0 if everything is connected, non-zero otherwise.
+ */
+int check_everything_connected(sha1_iterate_fn fn, int quiet, void *cb_data)
+{
+ struct child_process rev_list;
+ const char *argv[] = {"rev-list", "--verify-objects",
+ "--stdin", "--not", "--all", NULL, NULL};
+ char commit[41];
+ unsigned char sha1[20];
+ int err = 0;
+
+ if (fn(cb_data, sha1))
+ return err;
+
+ if (quiet)
+ argv[5] = "--quiet";
+
+ memset(&rev_list, 0, sizeof(rev_list));
+ rev_list.argv = argv;
+ rev_list.git_cmd = 1;
+ rev_list.in = -1;
+ rev_list.no_stdout = 1;
+ rev_list.no_stderr = quiet;
+ if (start_command(&rev_list))
+ return error(_("Could not run 'git rev-list'"));
+
+ sigchain_push(SIGPIPE, SIG_IGN);
+
+ commit[40] = '\n';
+ do {
+ memcpy(commit, sha1_to_hex(sha1), 40);
+ if (write_in_full(rev_list.in, commit, 41) < 0) {
+ if (errno != EPIPE && errno != EINVAL)
+ error(_("failed write to rev-list: %s"),
+ strerror(errno));
+ err = -1;
+ break;
+ }
+ } while (!fn(cb_data, sha1));
+
+ if (close(rev_list.in)) {
+ error(_("failed to close rev-list's stdin: %s"), strerror(errno));
+ err = -1;
+ }
+
+ sigchain_pop(SIGPIPE);
+ return finish_command(&rev_list) || err;
+}
diff --git a/connected.h b/connected.h
new file mode 100644
index 0000000000..7e4585a6cb
--- /dev/null
+++ b/connected.h
@@ -0,0 +1,20 @@
+#ifndef CONNECTED_H
+#define CONNECTED_H
+
+/*
+ * Take callback data, and return next object name in the buffer.
+ * When called after returning the name for the last object, return -1
+ * to signal EOF, otherwise return 0.
+ */
+typedef int (*sha1_iterate_fn)(void *, unsigned char [20]);
+
+/*
+ * Make sure that our object store has all the commits necessary to
+ * connect the ancestry chain to some of our existing refs, and all
+ * the trees and blobs that these commits use.
+ *
+ * Return 0 if Ok, non zero otherwise (i.e. some missing objects)
+ */
+extern int check_everything_connected(sha1_iterate_fn, int quiet, void *cb_data);
+
+#endif /* CONNECTED_H */