apply: tighten constness of line buffer

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index af429e101777f1c5df09734433278cfb075e978c..7ec68a1e8089f74ce7c70fecd86d5c18264ce4bc 100644 (file)
--- 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>";
 
@@ -25,7 +26,8 @@ static int deny_deletes;
 static int deny_non_fast_forwards;
 static enum deny_action deny_current_branch = DENY_UNCONFIGURED;
 static enum deny_action deny_delete_current = DENY_UNCONFIGURED;
-static int receive_fsck_objects;
+static int receive_fsck_objects = -1;
+static int transfer_fsck_objects = -1;
 static int receive_unpack_limit = -1;
 static int transfer_unpack_limit = -1;
 static int unpack_limit = 100;
@@ -79,6 +81,11 @@ static int receive_pack_config(const char *var, const char *value, void *cb)
                return 0;
        }
 
+       if (strcmp(var, "transfer.fsckobjects") == 0) {
+               transfer_fsck_objects = git_config_bool(var, value);
+               return 0;
+       }
+
        if (!strcmp(var, "receive.denycurrentbranch")) {
                deny_current_branch = parse_deny_action(var, value);
                return 0;
@@ -147,7 +154,8 @@ static void write_head_info(void)
 struct command {
        struct command *next;
        const char *error_string;
-       unsigned int skip_update;
+       unsigned int skip_update:1,
+                    did_not_exist:1;
        unsigned char old_sha1[20];
        unsigned char new_sha1[20];
        char ref_name[FLEX_ARRAY]; /* more */
@@ -257,6 +265,7 @@ static int run_and_feed_hook(const char *hook_name, feed_fn feed, void *feed_sta
 
 struct receive_hook_feed_state {
        struct command *cmd;
+       int skip_broken;
        struct strbuf buf;
 };
 
@@ -265,7 +274,8 @@ static int feed_receive_hook(void *state_, const char **bufp, size_t *sizep)
        struct receive_hook_feed_state *state = state_;
        struct command *cmd = state->cmd;
 
-       while (cmd && cmd->error_string)
+       while (cmd &&
+              state->skip_broken && (cmd->error_string || cmd->did_not_exist))
                cmd = cmd->next;
        if (!cmd)
                return -1; /* EOF */
@@ -281,13 +291,15 @@ static int feed_receive_hook(void *state_, const char **bufp, size_t *sizep)
        return 0;
 }
 
-static int run_receive_hook(struct command *commands, const char *hook_name)
+static int run_receive_hook(struct command *commands, const char *hook_name,
+                           int skip_broken)
 {
        struct receive_hook_feed_state state;
        int status;
 
        strbuf_init(&state.buf, 0);
        state.cmd = commands;
+       state.skip_broken = skip_broken;
        if (feed_receive_hook(&state, NULL, NULL))
                return 0;
        state.cmd = commands;
@@ -389,7 +401,7 @@ static const char *update(struct command *cmd)
        struct ref_lock *lock;
 
        /* only refs/... are allowed */
-       if (prefixcmp(name, "refs/") || check_ref_format(name + 5)) {
+       if (prefixcmp(name, "refs/") || check_refname_format(name + 5, 0)) {
                rp_error("refusing to create funny ref '%s' remotely", name);
                return "funny refname";
        }
@@ -478,8 +490,13 @@ static const char *update(struct command *cmd)
 
        if (is_null_sha1(new_sha1)) {
                if (!parse_object(old_sha1)) {
-                       rp_warning("Allowing deletion of corrupt ref.");
                        old_sha1 = NULL;
+                       if (ref_exists(name)) {
+                               rp_warning("Allowing deletion of corrupt ref.");
+                       } else {
+                               rp_warning("Deleting a non-existent ref.");
+                               cmd->did_not_exist = 1;
+                       }
                }
                if (delete_ref(namespaced_name, old_sha1, 0)) {
                        rp_error("failed to delete %s", name);
@@ -510,7 +527,7 @@ static void run_update_post_hook(struct command *commands)
        struct child_process proc;
 
        for (argc = 0, cmd = commands; cmd; cmd = cmd->next) {
-               if (cmd->error_string)
+               if (cmd->error_string || cmd->did_not_exist)
                        continue;
                argc++;
        }
@@ -521,7 +538,7 @@ static void run_update_post_hook(struct command *commands)
 
        for (argc = 1, cmd = commands; cmd; cmd = cmd->next) {
                char *p;
-               if (cmd->error_string)
+               if (cmd->error_string || cmd->did_not_exist)
                        continue;
                p = xmalloc(strlen(cmd->ref_name) + 1);
                strcpy(p, cmd->ref_name);
@@ -612,6 +629,48 @@ 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 || is_null_sha1(cmd->new_sha1))
+               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;
+
+       while (cmd) {
+               if (!is_null_sha1(cmd->new_sha1)) {
+                       hashcpy(sha1, cmd->new_sha1);
+                       *cmd_list = cmd->next;
+                       return 0;
+               }
+               cmd = cmd->next;
+       }
+       *cmd_list = NULL;
+       return -1; /* end of list */
+}
+
 static void execute_commands(struct command *commands, const char *unpacker_error)
 {
        struct command *cmd;
@@ -623,7 +682,12 @@ static void execute_commands(struct command *commands, const char *unpacker_erro
                return;
        }
 
-       if (run_receive_hook(commands, pre_receive_hook)) {
+       cmd = commands;
+       if (check_everything_connected(iterate_receive_command_list,
+                                      0, &cmd))
+               set_connectivity_errors(commands);
+
+       if (run_receive_hook(commands, pre_receive_hook, 0)) {
                for (cmd = commands; cmd; cmd = cmd->next)
                        cmd->error_string = "pre-receive hook declined";
                return;
@@ -707,6 +771,11 @@ static const char *unpack(void)
        struct pack_header hdr;
        const char *hdr_err;
        char hdr_arg[38];
+       int fsck_objects = (receive_fsck_objects >= 0
+                           ? receive_fsck_objects
+                           : transfer_fsck_objects >= 0
+                           ? transfer_fsck_objects
+                           : 0);
 
        hdr_err = parse_pack_header(&hdr);
        if (hdr_err)
@@ -719,7 +788,7 @@ static const char *unpack(void)
                int code, i = 0;
                const char *unpacker[4];
                unpacker[i++] = "unpack-objects";
-               if (receive_fsck_objects)
+               if (fsck_objects)
                        unpacker[i++] = "--strict";
                unpacker[i++] = hdr_arg;
                unpacker[i++] = NULL;
@@ -739,7 +808,7 @@ static const char *unpack(void)
 
                keeper[i++] = "index-pack";
                keeper[i++] = "--stdin";
-               if (receive_fsck_objects)
+               if (fsck_objects)
                        keeper[i++] = "--strict";
                keeper[i++] = "--fix-thin";
                keeper[i++] = hdr_arg;
@@ -886,7 +955,7 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
                        unlink_or_warn(pack_lockfile);
                if (report_status)
                        report(commands, unpack_status);
-               run_receive_hook(commands, post_receive_hook);
+               run_receive_hook(commands, post_receive_hook, 1);
                run_update_post_hook(commands);
                if (auto_gc) {
                        const char *argv_gc_auto[] = {