builtin-blame: set up the work_tree before the first file access

diff --git a/builtin-pack-refs.c b/builtin-pack-refs.c
index d080e30d67a913529d46e0da169faa4b0be75580..a62f06bb89aa6ef035c26c4aad05c0fdbf0512de 100644 (file)
--- a/builtin-pack-refs.c
+++ b/builtin-pack-refs.c
@@ -1,10 +1,9 @@
+#include "builtin.h"
 #include "cache.h"
 #include "refs.h"
 #include "object.h"
 #include "tag.h"
-
-static const char builtin_pack_refs_usage[] =
-"git-pack-refs [--all] [--prune | --no-prune]";
+#include "parse-options.h"
 
 struct ref_to_prune {
        struct ref_to_prune *next;
@@ -12,9 +11,11 @@ struct ref_to_prune {
        char name[FLEX_ARRAY];
 };
 
+#define PACK_REFS_PRUNE        0x0001
+#define PACK_REFS_ALL  0x0002
+
 struct pack_refs_cb_data {
-       int prune;
-       int all;
+       unsigned int flags;
        struct ref_to_prune *ref_to_prune;
        FILE *refs_file;
 };
@@ -39,7 +40,7 @@ static int handle_one_ref(const char *path, const unsigned char *sha1,
        is_tag_ref = !prefixcmp(path, "refs/tags/");
 
        /* ALWAYS pack refs that were already packed or are tags */
-       if (!cb->all && !is_tag_ref && !(flags & REF_ISPACKED))
+       if (!(cb->flags & PACK_REFS_ALL) && !is_tag_ref && !(flags & REF_ISPACKED))
                return 0;
 
        fprintf(cb->refs_file, "%s %s\n", sha1_to_hex(sha1), path);
@@ -53,7 +54,7 @@ static int handle_one_ref(const char *path, const unsigned char *sha1,
                }
        }
 
-       if (cb->prune && !do_not_prune(flags)) {
+       if ((cb->flags & PACK_REFS_PRUNE) && !do_not_prune(flags)) {
                int namelen = strlen(path) + 1;
                struct ref_to_prune *n = xcalloc(1, sizeof(*n) + namelen);
                hashcpy(n->sha1, sha1);
@@ -85,33 +86,13 @@ static void prune_refs(struct ref_to_prune *r)
 
 static struct lock_file packed;
 
-int cmd_pack_refs(int argc, const char **argv, const char *prefix)
+static int pack_refs(unsigned int flags)
 {
-       int fd, i;
+       int fd;
        struct pack_refs_cb_data cbdata;
 
        memset(&cbdata, 0, sizeof(cbdata));
-
-       cbdata.prune = 1;
-       for (i = 1; i < argc; i++) {
-               const char *arg = argv[i];
-               if (!strcmp(arg, "--prune")) {
-                       cbdata.prune = 1; /* now the default */
-                       continue;
-               }
-               if (!strcmp(arg, "--no-prune")) {
-                       cbdata.prune = 0;
-                       continue;
-               }
-               if (!strcmp(arg, "--all")) {
-                       cbdata.all = 1;
-                       continue;
-               }
-               /* perhaps other parameters later... */
-               break;
-       }
-       if (i != argc)
-               usage(builtin_pack_refs_usage);
+       cbdata.flags = flags;
 
        fd = hold_lock_file_for_update(&packed, git_path("packed-refs"), 1);
        cbdata.refs_file = fdopen(fd, "w");
@@ -123,12 +104,37 @@ int cmd_pack_refs(int argc, const char **argv, const char *prefix)
        fprintf(cbdata.refs_file, "# pack-refs with: peeled \n");
 
        for_each_ref(handle_one_ref, &cbdata);
-       fflush(cbdata.refs_file);
-       fsync(fd);
-       fclose(cbdata.refs_file);
+       if (ferror(cbdata.refs_file))
+               die("failed to write ref-pack file");
+       if (fflush(cbdata.refs_file) || fsync(fd) || fclose(cbdata.refs_file))
+               die("failed to write ref-pack file (%s)", strerror(errno));
        if (commit_lock_file(&packed) < 0)
                die("unable to overwrite old ref-pack file (%s)", strerror(errno));
-       if (cbdata.prune)
+       if (cbdata.flags & PACK_REFS_PRUNE)
                prune_refs(cbdata.ref_to_prune);
        return 0;
 }
+
+static char const * const pack_refs_usage[] = {
+       "git-pack-refs [options]",
+       NULL
+};
+
+int cmd_pack_refs(int argc, const char **argv, const char *prefix)
+{
+       int all = 0, prune = 1;
+       unsigned int flags = 0;
+       struct option opts[] = {
+               OPT_BOOLEAN(0, "all", &all, "pack everything"),
+               OPT_BOOLEAN(0, "prune", &prune, "prune loose refs (default)"),
+               OPT_END(),
+       };
+
+       if (parse_options(argc, argv, opts, pack_refs_usage, 0))
+               usage_with_options(pack_refs_usage, opts);
+       if (prune)
+               flags |= PACK_REFS_PRUNE;
+       if (all)
+               flags |= PACK_REFS_ALL;
+       return pack_refs(flags);
+}