Reduce the number of connects when fetching

diff --git a/builtin-commit.c b/builtin-commit.c
index 16345e9b9332c0e42fb2e61c39dc0534db9f7f8e..c787bed696591f58d1336a701e57414c9d5c8cbf 100644 (file)
--- a/builtin-commit.c
+++ b/builtin-commit.c
@@ -122,19 +122,23 @@ static void rollback_index_files(void)
        }
 }
 
-static void commit_index_files(void)
+static int commit_index_files(void)
 {
+       int err = 0;
+
        switch (commit_style) {
        case COMMIT_AS_IS:
                break; /* nothing to do */
        case COMMIT_NORMAL:
-               commit_lock_file(&index_lock);
+               err = commit_lock_file(&index_lock);
                break;
        case COMMIT_PARTIAL:
-               commit_lock_file(&index_lock);
+               err = commit_lock_file(&index_lock);
                rollback_lock_file(&false_lock);
                break;
        }
+
+       return err;
 }
 
 /*
@@ -237,7 +241,8 @@ static char *prepare_index(int argc, const char **argv, const char *prefix)
                int fd = hold_locked_index(&index_lock, 1);
                add_files_to_cache(0, also ? prefix : NULL, pathspec);
                refresh_cache(REFRESH_QUIET);
-               if (write_cache(fd, active_cache, active_nr))
+               if (write_cache(fd, active_cache, active_nr) ||
+                   close_lock_file(&index_lock))
                        die("unable to write new_index file");
                commit_style = COMMIT_NORMAL;
                return index_lock.filename;
@@ -298,7 +303,8 @@ static char *prepare_index(int argc, const char **argv, const char *prefix)
        fd = hold_locked_index(&index_lock, 1);
        add_remove_files(&partial);
        refresh_cache(REFRESH_QUIET);
-       if (write_cache(fd, active_cache, active_nr))
+       if (write_cache(fd, active_cache, active_nr) ||
+           close_lock_file(&index_lock))
                die("unable to write new_index file");
 
        fd = hold_lock_file_for_update(&false_lock,
@@ -308,7 +314,8 @@ static char *prepare_index(int argc, const char **argv, const char *prefix)
        add_remove_files(&partial);
        refresh_cache(REFRESH_QUIET);
 
-       if (write_cache(fd, active_cache, active_nr))
+       if (write_cache(fd, active_cache, active_nr) ||
+           close_lock_file(&false_lock))
                die("unable to write temporary index file");
        return false_lock.filename;
 }
@@ -594,7 +601,7 @@ static int parse_and_validate_options(int argc, const char *argv[],
 
                if (get_sha1(use_message, sha1))
                        die("could not lookup commit %s", use_message);
-               commit = lookup_commit(sha1);
+               commit = lookup_commit_reference(sha1);
                if (!commit || parse_commit(commit))
                        die("could not parse commit %s", use_message);
 
@@ -756,6 +763,17 @@ static const char commit_utf8_warn[] =
 "You may want to amend it after fixing the message, or set the config\n"
 "variable i18n.commitencoding to the encoding your project uses.\n";
 
+static void add_parent(struct strbuf *sb, const unsigned char *sha1)
+{
+       struct object *obj = parse_object(sha1);
+       const char *parent = sha1_to_hex(sha1);
+       if (!obj)
+               die("Unable to find commit parent %s", parent);
+       if (obj->type != OBJ_COMMIT)
+               die("Parent %s isn't a proper commit", parent);
+       strbuf_addf(sb, "parent %s\n", parent);
+}
+
 int cmd_commit(int argc, const char **argv, const char *prefix)
 {
        int header_len;
@@ -818,21 +836,24 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                        die("could not parse HEAD commit");
 
                for (c = commit->parents; c; c = c->next)
-                       strbuf_addf(&sb, "parent %s\n",
-                                     sha1_to_hex(c->item->object.sha1));
+                       add_parent(&sb, c->item->object.sha1);
        } else if (in_merge) {
                struct strbuf m;
                FILE *fp;
 
                reflog_msg = "commit (merge)";
-               strbuf_addf(&sb, "parent %s\n", sha1_to_hex(head_sha1));
+               add_parent(&sb, head_sha1);
                strbuf_init(&m, 0);
                fp = fopen(git_path("MERGE_HEAD"), "r");
                if (fp == NULL)
                        die("could not open %s for reading: %s",
                            git_path("MERGE_HEAD"), strerror(errno));
-               while (strbuf_getline(&m, fp, '\n') != EOF)
-                       strbuf_addf(&sb, "parent %s\n", m.buf);
+               while (strbuf_getline(&m, fp, '\n') != EOF) {
+                       unsigned char sha1[20];
+                       if (get_sha1_hex(m.buf, sha1) < 0)
+                               die("Corrupt MERGE_HEAD file (%s)", m.buf);
+                       add_parent(&sb, sha1);
+               }
                fclose(fp);
                strbuf_release(&m);
        } else {
@@ -909,7 +930,10 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
        unlink(git_path("MERGE_HEAD"));
        unlink(git_path("MERGE_MSG"));
 
-       commit_index_files();
+       if (commit_index_files())
+               die ("Repository has been updated, but unable to write\n"
+                    "new_index file. Check that disk is not full or quota is\n"
+                    "not exceeded, and then \"git reset HEAD\" to recover.");
 
        rerere();
        run_hook(get_index_file(), "post-commit", NULL);