git-am: print fair error message when format detection fails

diff --git a/fast-import.c b/fast-import.c
index e9d23ffb2fb3f6df141944dca7ddab0edbd1e5ee..7ef9865aa6da794ab52cfc50f21f9f41f861fc4f 100644 (file)
--- a/fast-import.c
+++ b/fast-import.c
@@ -905,10 +905,10 @@ static char *keep_pack(char *curr_index_name)
 
        keep_fd = odb_pack_keep(name, sizeof(name), pack_data->sha1);
        if (keep_fd < 0)
-               die("cannot create keep file");
+               die_errno("cannot create keep file");
        write_or_die(keep_fd, keep_msg, strlen(keep_msg));
        if (close(keep_fd))
-               die("failed to write keep file");
+               die_errno("failed to write keep file");
 
        snprintf(name, sizeof(name), "%s/pack/pack-%s.pack",
                 get_object_directory(), sha1_to_hex(pack_data->sha1));
@@ -931,7 +931,7 @@ static void unkeep_all_packs(void)
                struct packed_git *p = all_packs[k];
                snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
                         get_object_directory(), sha1_to_hex(p->sha1));
-               unlink(name);
+               unlink_or_warn(name);
        }
 }
 
@@ -981,7 +981,7 @@ static void end_packfile(void)
        }
        else {
                close(old_p->pack_fd);
-               unlink(old_p->pack_name);
+               unlink_or_warn(old_p->pack_name);
        }
        free(old_p);
 
@@ -2342,7 +2342,7 @@ static void import_marks(const char *input_file)
        char line[512];
        FILE *f = fopen(input_file, "r");
        if (!f)
-               die("cannot read %s: %s", input_file, strerror(errno));
+               die_errno("cannot read '%s'", input_file);
        while (fgets(line, sizeof(line), f)) {
                uintmax_t mark;
                char *end;
@@ -2448,7 +2448,7 @@ int main(int argc, const char **argv)
                                fclose(pack_edges);
                        pack_edges = fopen(a + 20, "a");
                        if (!pack_edges)
-                               die("Cannot open %s: %s", a + 20, strerror(errno));
+                               die_errno("Cannot open '%s'", a + 20);
                } else if (!strcmp(a, "--force"))
                        force_update = 1;
                else if (!strcmp(a, "--quiet"))