submodule: add die_in_unpopulated_submodule function

diff --git a/builtin/read-tree.c b/builtin/read-tree.c
index 9bd1fd755ef03824442f6c751a9603b95bfe66ee..23e212ee8c5b2d26f03ac6be2b822a87ad06c233 100644 (file)
--- a/builtin/read-tree.c
+++ b/builtin/read-tree.c
@@ -15,10 +15,13 @@
 #include "builtin.h"
 #include "parse-options.h"
 #include "resolve-undo.h"
+#include "submodule.h"
+#include "submodule-config.h"
 
 static int nr_trees;
 static int read_empty;
 static struct tree *trees[MAX_UNPACK_TREES];
+static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
 
 static int list_tree(unsigned char *sha1)
 {
@@ -96,6 +99,23 @@ static int debug_merge(const struct cache_entry * const *stages,
        return 0;
 }
 
+static int option_parse_recurse_submodules(const struct option *opt,
+                                          const char *arg, int unset)
+{
+       if (unset) {
+               recurse_submodules = RECURSE_SUBMODULES_OFF;
+               return 0;
+       }
+       if (arg)
+               recurse_submodules =
+                       parse_update_recurse_submodules_arg(opt->long_name,
+                                                           arg);
+       else
+               recurse_submodules = RECURSE_SUBMODULES_ON;
+
+       return 0;
+}
+
 static struct lock_file lock_file;
 
 int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
@@ -109,34 +129,37 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
                { OPTION_CALLBACK, 0, "index-output", NULL, N_("file"),
                  N_("write resulting index to <file>"),
                  PARSE_OPT_NONEG, index_output_cb },
-               OPT_SET_INT(0, "empty", &read_empty,
-                           N_("only empty the index"), 1),
+               OPT_BOOL(0, "empty", &read_empty,
+                           N_("only empty the index")),
                OPT__VERBOSE(&opts.verbose_update, N_("be verbose")),
                OPT_GROUP(N_("Merging")),
-               OPT_SET_INT('m', NULL, &opts.merge,
-                           N_("perform a merge in addition to a read"), 1),
-               OPT_SET_INT(0, "trivial", &opts.trivial_merges_only,
-                           N_("3-way merge if no file level merging required"), 1),
-               OPT_SET_INT(0, "aggressive", &opts.aggressive,
-                           N_("3-way merge in presence of adds and removes"), 1),
-               OPT_SET_INT(0, "reset", &opts.reset,
-                           N_("same as -m, but discard unmerged entries"), 1),
+               OPT_BOOL('m', NULL, &opts.merge,
+                        N_("perform a merge in addition to a read")),
+               OPT_BOOL(0, "trivial", &opts.trivial_merges_only,
+                        N_("3-way merge if no file level merging required")),
+               OPT_BOOL(0, "aggressive", &opts.aggressive,
+                        N_("3-way merge in presence of adds and removes")),
+               OPT_BOOL(0, "reset", &opts.reset,
+                        N_("same as -m, but discard unmerged entries")),
                { OPTION_STRING, 0, "prefix", &opts.prefix, N_("<subdirectory>/"),
                  N_("read the tree into the index under <subdirectory>/"),
                  PARSE_OPT_NONEG | PARSE_OPT_LITERAL_ARGHELP },
-               OPT_SET_INT('u', NULL, &opts.update,
-                           N_("update working tree with merge result"), 1),
+               OPT_BOOL('u', NULL, &opts.update,
+                        N_("update working tree with merge result")),
                { OPTION_CALLBACK, 0, "exclude-per-directory", &opts,
                  N_("gitignore"),
                  N_("allow explicitly ignored files to be overwritten"),
                  PARSE_OPT_NONEG, exclude_per_directory_cb },
-               OPT_SET_INT('i', NULL, &opts.index_only,
-                           N_("don't check the working tree after merging"), 1),
+               OPT_BOOL('i', NULL, &opts.index_only,
+                        N_("don't check the working tree after merging")),
                OPT__DRY_RUN(&opts.dry_run, N_("don't update the index or the work tree")),
-               OPT_SET_INT(0, "no-sparse-checkout", &opts.skip_sparse_checkout,
-                           N_("skip applying sparse checkout filter"), 1),
-               OPT_SET_INT(0, "debug-unpack", &opts.debug_unpack,
-                           N_("debug unpack-trees"), 1),
+               OPT_BOOL(0, "no-sparse-checkout", &opts.skip_sparse_checkout,
+                        N_("skip applying sparse checkout filter")),
+               OPT_BOOL(0, "debug-unpack", &opts.debug_unpack,
+                        N_("debug unpack-trees")),
+               { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules,
+                           "checkout", "control recursive updating of submodules",
+                           PARSE_OPT_OPTARG, option_parse_recurse_submodules },
                OPT_END()
        };
 
@@ -150,7 +173,13 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
        argc = parse_options(argc, argv, unused_prefix, read_tree_options,
                             read_tree_usage, 0);
 
-       hold_locked_index(&lock_file, 1);
+       hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
+
+       if (recurse_submodules != RECURSE_SUBMODULES_DEFAULT) {
+               gitmodules_config();
+               git_config(submodule_config, NULL);
+               set_config_update_recurse_submodules(RECURSE_SUBMODULES_ON);
+       }
 
        prefix_set = opts.prefix ? 1 : 0;
        if (1 < opts.merge + opts.reset + prefix_set)