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authorJunio C Hamano <gitster@pobox.com>2010-05-21 11:02:19 (GMT)
committerJunio C Hamano <gitster@pobox.com>2010-05-21 11:02:19 (GMT)
commit9215f76fb6d938ae93889f46f27cff22723fe0e4 (patch)
treed73aed730de1af3e83ce367a1bf9f1a266083032 /builtin/receive-pack.c
parent035bf8d7c484b82e3e278af8c91584ae724cb5d4 (diff)
parentd4785cd11dd0a55e30a1185a96910f0e57b6049a (diff)
downloadgit-9215f76fb6d938ae93889f46f27cff22723fe0e4.zip
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Merge branch 'js/maint-receive-pack-symref-alias'
* js/maint-receive-pack-symref-alias: t5516-fetch-push.sh: style cleanup receive-pack: detect aliased updates which can occur with symrefs receive-pack: switch global variable 'commands' to a parameter Conflicts: t/t5516-fetch-push.sh
Diffstat (limited to 'builtin/receive-pack.c')
-rw-r--r--builtin/receive-pack.c128
1 files changed, 91 insertions, 37 deletions
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index 0559fcc..bb34757 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -9,6 +9,7 @@
#include "object.h"
#include "remote.h"
#include "transport.h"
+#include "string-list.h"
static const char receive_pack_usage[] = "git receive-pack <git-dir>";
@@ -129,13 +130,12 @@ static void write_head_info(void)
struct command {
struct command *next;
const char *error_string;
+ unsigned int skip_update;
unsigned char old_sha1[20];
unsigned char new_sha1[20];
char ref_name[FLEX_ARRAY]; /* more */
};
-static struct command *commands;
-
static const char pre_receive_hook[] = "hooks/pre-receive";
static const char post_receive_hook[] = "hooks/post-receive";
@@ -188,7 +188,7 @@ static int copy_to_sideband(int in, int out, void *arg)
return 0;
}
-static int run_receive_hook(const char *hook_name)
+static int run_receive_hook(struct command *commands, const char *hook_name)
{
static char buf[sizeof(commands->old_sha1) * 2 + PATH_MAX + 4];
struct command *cmd;
@@ -447,15 +447,15 @@ static const char *update(struct command *cmd)
static char update_post_hook[] = "hooks/post-update";
-static void run_update_post_hook(struct command *cmd)
+static void run_update_post_hook(struct command *commands)
{
- struct command *cmd_p;
+ struct command *cmd;
int argc;
const char **argv;
struct child_process proc;
- for (argc = 0, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
- if (cmd_p->error_string)
+ for (argc = 0, cmd = commands; cmd; cmd = cmd->next) {
+ if (cmd->error_string)
continue;
argc++;
}
@@ -464,12 +464,12 @@ static void run_update_post_hook(struct command *cmd)
argv = xmalloc(sizeof(*argv) * (2 + argc));
argv[0] = update_post_hook;
- for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
+ for (argc = 1, cmd = commands; cmd; cmd = cmd->next) {
char *p;
- if (cmd_p->error_string)
+ if (cmd->error_string)
continue;
- p = xmalloc(strlen(cmd_p->ref_name) + 1);
- strcpy(p, cmd_p->ref_name);
+ p = xmalloc(strlen(cmd->ref_name) + 1);
+ strcpy(p, cmd->ref_name);
argv[argc] = p;
argc++;
}
@@ -488,37 +488,92 @@ static void run_update_post_hook(struct command *cmd)
}
}
-static void execute_commands(const char *unpacker_error)
+static void check_aliased_update(struct command *cmd, struct string_list *list)
+{
+ struct string_list_item *item;
+ struct command *dst_cmd;
+ unsigned char sha1[20];
+ char cmd_oldh[41], cmd_newh[41], dst_oldh[41], dst_newh[41];
+ int flag;
+
+ const char *dst_name = resolve_ref(cmd->ref_name, sha1, 0, &flag);
+
+ if (!(flag & REF_ISSYMREF))
+ return;
+
+ if ((item = string_list_lookup(dst_name, list)) == NULL)
+ return;
+
+ cmd->skip_update = 1;
+
+ dst_cmd = (struct command *) item->util;
+
+ if (!hashcmp(cmd->old_sha1, dst_cmd->old_sha1) &&
+ !hashcmp(cmd->new_sha1, dst_cmd->new_sha1))
+ return;
+
+ dst_cmd->skip_update = 1;
+
+ strcpy(cmd_oldh, find_unique_abbrev(cmd->old_sha1, DEFAULT_ABBREV));
+ strcat(cmd_newh, find_unique_abbrev(cmd->new_sha1, DEFAULT_ABBREV));
+ strcpy(dst_oldh, find_unique_abbrev(dst_cmd->old_sha1, DEFAULT_ABBREV));
+ strcat(dst_newh, find_unique_abbrev(dst_cmd->new_sha1, DEFAULT_ABBREV));
+ rp_error("refusing inconsistent update between symref '%s' (%s..%s) and"
+ " its target '%s' (%s..%s)",
+ cmd->ref_name, cmd_oldh, cmd_newh,
+ dst_cmd->ref_name, dst_oldh, dst_newh);
+
+ cmd->error_string = dst_cmd->error_string =
+ "inconsistent aliased update";
+}
+
+static void check_aliased_updates(struct command *commands)
+{
+ struct command *cmd;
+ struct string_list ref_list = { NULL, 0, 0, 0 };
+
+ for (cmd = commands; cmd; cmd = cmd->next) {
+ struct string_list_item *item =
+ string_list_append(cmd->ref_name, &ref_list);
+ item->util = (void *)cmd;
+ }
+ sort_string_list(&ref_list);
+
+ for (cmd = commands; cmd; cmd = cmd->next)
+ check_aliased_update(cmd, &ref_list);
+
+ string_list_clear(&ref_list, 0);
+}
+
+static void execute_commands(struct command *commands, const char *unpacker_error)
{
- struct command *cmd = commands;
+ struct command *cmd;
unsigned char sha1[20];
if (unpacker_error) {
- while (cmd) {
+ for (cmd = commands; cmd; cmd = cmd->next)
cmd->error_string = "n/a (unpacker error)";
- cmd = cmd->next;
- }
return;
}
- if (run_receive_hook(pre_receive_hook)) {
- while (cmd) {
+ if (run_receive_hook(commands, pre_receive_hook)) {
+ for (cmd = commands; cmd; cmd = cmd->next)
cmd->error_string = "pre-receive hook declined";
- cmd = cmd->next;
- }
return;
}
+ check_aliased_updates(commands);
+
head_name = resolve_ref("HEAD", sha1, 0, NULL);
- while (cmd) {
- cmd->error_string = update(cmd);
- cmd = cmd->next;
- }
+ for (cmd = commands; cmd; cmd = cmd->next)
+ if (!cmd->skip_update)
+ cmd->error_string = update(cmd);
}
-static void read_head_info(void)
+static struct command *read_head_info(void)
{
+ struct command *commands = NULL;
struct command **p = &commands;
for (;;) {
static char line[1000];
@@ -548,15 +603,14 @@ static void read_head_info(void)
if (strstr(refname + reflen + 1, "side-band-64k"))
use_sideband = LARGE_PACKET_MAX;
}
- cmd = xmalloc(sizeof(struct command) + len - 80);
+ cmd = xcalloc(1, sizeof(struct command) + len - 80);
hashcpy(cmd->old_sha1, old_sha1);
hashcpy(cmd->new_sha1, new_sha1);
memcpy(cmd->ref_name, line + 82, len - 81);
- cmd->error_string = NULL;
- cmd->next = NULL;
*p = cmd;
p = &cmd->next;
}
+ return commands;
}
static const char *parse_pack_header(struct pack_header *hdr)
@@ -643,7 +697,7 @@ static const char *unpack(void)
}
}
-static void report(const char *unpack_status)
+static void report(struct command *commands, const char *unpack_status)
{
struct command *cmd;
struct strbuf buf = STRBUF_INIT;
@@ -667,12 +721,12 @@ static void report(const char *unpack_status)
strbuf_release(&buf);
}
-static int delete_only(struct command *cmd)
+static int delete_only(struct command *commands)
{
- while (cmd) {
+ struct command *cmd;
+ for (cmd = commands; cmd; cmd = cmd->next) {
if (!is_null_sha1(cmd->new_sha1))
return 0;
- cmd = cmd->next;
}
return 1;
}
@@ -722,6 +776,7 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
int stateless_rpc = 0;
int i;
char *dir = NULL;
+ struct command *commands;
argv++;
for (i = 1; i < argc; i++) {
@@ -772,18 +827,17 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
if (advertise_refs)
return 0;
- read_head_info();
- if (commands) {
+ if ((commands = read_head_info()) != NULL) {
const char *unpack_status = NULL;
if (!delete_only(commands))
unpack_status = unpack();
- execute_commands(unpack_status);
+ execute_commands(commands, unpack_status);
if (pack_lockfile)
unlink_or_warn(pack_lockfile);
if (report_status)
- report(unpack_status);
- run_receive_hook(post_receive_hook);
+ report(commands, unpack_status);
+ run_receive_hook(commands, post_receive_hook);
run_update_post_hook(commands);
if (auto_gc) {
const char *argv_gc_auto[] = {