Merge branch 'mr/worktree-list'

diff --git a/builtin/gc.c b/builtin/gc.c
index 0ad8d30b56f89a9ea6ac3a9ee5ae4593ae9754a0..eeeb21b1c46dae897ec9db51e58f8d15fc4f915e 100644 (file)
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -44,6 +44,7 @@ static struct argv_array prune_worktrees = ARGV_ARRAY_INIT;
 static struct argv_array rerere = ARGV_ARRAY_INIT;
 
 static struct tempfile pidfile;
+static struct lock_file log_lock;
 
 static void git_config_date_string(const char *key, const char **output)
 {
@@ -56,6 +57,28 @@ static void git_config_date_string(const char *key, const char **output)
        }
 }
 
+static void process_log_file(void)
+{
+       struct stat st;
+       if (!fstat(get_lock_file_fd(&log_lock), &st) && st.st_size)
+               commit_lock_file(&log_lock);
+       else
+               rollback_lock_file(&log_lock);
+}
+
+static void process_log_file_at_exit(void)
+{
+       fflush(stderr);
+       process_log_file();
+}
+
+static void process_log_file_on_signal(int signo)
+{
+       process_log_file();
+       sigchain_pop(signo);
+       raise(signo);
+}
+
 static void gc_config(void)
 {
        const char *value;
@@ -194,7 +217,7 @@ static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
                return NULL;
 
        if (gethostname(my_host, sizeof(my_host)))
-               strcpy(my_host, "unknown");
+               xsnprintf(my_host, sizeof(my_host), "unknown");
 
        pidfile_path = git_pathdup("gc.pid");
        fd = hold_lock_file_for_update(&lock, pidfile_path,
@@ -241,6 +264,24 @@ static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
        return NULL;
 }
 
+static int report_last_gc_error(void)
+{
+       struct strbuf sb = STRBUF_INIT;
+       int ret;
+
+       ret = strbuf_read_file(&sb, git_path("gc.log"), 0);
+       if (ret > 0)
+               return error(_("The last gc run reported the following. "
+                              "Please correct the root cause\n"
+                              "and remove %s.\n"
+                              "Automatic cleanup will not be performed "
+                              "until the file is removed.\n\n"
+                              "%s"),
+                            git_path("gc.log"), sb.buf);
+       strbuf_release(&sb);
+       return 0;
+}
+
 static int gc_before_repack(void)
 {
        if (pack_refs && run_command_v_opt(pack_refs_cmd.argv, RUN_GIT_CMD))
@@ -262,6 +303,7 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
        int force = 0;
        const char *name;
        pid_t pid;
+       int daemonized = 0;
 
        struct option builtin_gc_options[] = {
                OPT__QUIET(&quiet, N_("suppress progress reporting")),
@@ -318,13 +360,16 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
                        fprintf(stderr, _("See \"git help gc\" for manual housekeeping.\n"));
                }
                if (detach_auto) {
+                       if (report_last_gc_error())
+                               return -1;
+
                        if (gc_before_repack())
                                return -1;
                        /*
                         * failure to daemonize is ok, we'll continue
                         * in foreground
                         */
-                       daemonize();
+                       daemonized = !daemonize();
                }
        } else
                add_repack_all_option();
@@ -337,6 +382,15 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
                    name, (uintmax_t)pid);
        }
 
+       if (daemonized) {
+               hold_lock_file_for_update(&log_lock,
+                                         git_path("gc.log"),
+                                         LOCK_DIE_ON_ERROR);
+               dup2(get_lock_file_fd(&log_lock), 2);
+               sigchain_push_common(process_log_file_on_signal);
+               atexit(process_log_file_at_exit);
+       }
+
        if (gc_before_repack())
                return -1;