1 files changed, 54 insertions, 5 deletions

diff --git a/builtin/add.c b/builtin/add.c
index d9a2491e48..8d08e99e92 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -4,6 +4,7 @@
  * Copyright (C) 2006 Linus Torvalds
  */
 #include "cache.h"
+#include "config.h"
 #include "builtin.h"
 #include "lockfile.h"
 #include "dir.h"
@@ -31,7 +32,7 @@ struct update_callback_data {
 	int add_errors;
 };
 
-static void chmod_pathspec(struct pathspec *pathspec, int force_mode)
+static void chmod_pathspec(struct pathspec *pathspec, char flip)
 {
 	int i;
 
@@ -41,8 +42,8 @@ static void chmod_pathspec(struct pathspec *pathspec, int force_mode)
 		if (pathspec && !ce_path_match(ce, pathspec, NULL))
 			continue;
 
-		if (chmod_cache_entry(ce, force_mode) < 0)
-			fprintf(stderr, "cannot chmod '%s'", ce->name);
+		if (chmod_cache_entry(ce, flip) < 0)
+			fprintf(stderr, "cannot chmod %cx '%s'\n", flip, ce->name);
 	}
 }
 
@@ -115,8 +116,10 @@ int add_files_to_cache(const char *prefix,
 	rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
 	rev.diffopt.format_callback = update_callback;
 	rev.diffopt.format_callback_data = &data;
+	rev.diffopt.flags.override_submodule_config = 1;
 	rev.max_count = 0; /* do not compare unmerged paths with stage #2 */
 	run_diff_files(&rev, DIFF_RACY_IS_MODIFIED);
+	clear_pathspec(&rev.prune_data);
 	return !!data.add_errors;
 }
 
@@ -215,7 +218,7 @@ static int edit_patch(int argc, const char **argv, const char *prefix)
 	argc = setup_revisions(argc, argv, &rev, NULL);
 	rev.diffopt.output_format = DIFF_FORMAT_PATCH;
 	rev.diffopt.use_color = 0;
-	DIFF_OPT_SET(&rev.diffopt, IGNORE_DIRTY_SUBMODULES);
+	rev.diffopt.flags.ignore_dirty_submodules = 1;
 	out = open(file, O_CREAT | O_WRONLY, 0666);
 	if (out < 0)
 		die(_("Could not open '%s' for writing."), file);
@@ -249,6 +252,7 @@ N_("The following paths are ignored by one of your .gitignore files:\n");
 
 static int verbose, show_only, ignored_too, refresh_only;
 static int ignore_add_errors, intent_to_add, ignore_missing;
+static int warn_on_embedded_repo = 1;
 
 #define ADDREMOVE_DEFAULT 1
 static int addremove = ADDREMOVE_DEFAULT;
@@ -282,6 +286,8 @@ static struct option builtin_add_options[] = {
 	OPT_BOOL( 0 , "ignore-errors", &ignore_add_errors, N_("just skip files which cannot be added because of errors")),
 	OPT_BOOL( 0 , "ignore-missing", &ignore_missing, N_("check if - even missing - files are ignored in dry run")),
 	OPT_STRING( 0 , "chmod", &chmod_arg, N_("(+/-)x"), N_("override the executable bit of the listed files")),
+	OPT_HIDDEN_BOOL(0, "warn-embedded-repo", &warn_on_embedded_repo,
+			N_("warn when adding an embedded repository")),
 	OPT_END(),
 };
 
@@ -295,6 +301,45 @@ static int add_config(const char *var, const char *value, void *cb)
 	return git_default_config(var, value, cb);
 }
 
+static const char embedded_advice[] = N_(
+"You've added another git repository inside your current repository.\n"
+"Clones of the outer repository will not contain the contents of\n"
+"the embedded repository and will not know how to obtain it.\n"
+"If you meant to add a submodule, use:\n"
+"\n"
+"	git submodule add <url> %s\n"
+"\n"
+"If you added this path by mistake, you can remove it from the\n"
+"index with:\n"
+"\n"
+"	git rm --cached %s\n"
+"\n"
+"See \"git help submodule\" for more information."
+);
+
+static void check_embedded_repo(const char *path)
+{
+	struct strbuf name = STRBUF_INIT;
+
+	if (!warn_on_embedded_repo)
+		return;
+	if (!ends_with(path, "/"))
+		return;
+
+	/* Drop trailing slash for aesthetics */
+	strbuf_addstr(&name, path);
+	strbuf_strip_suffix(&name, "/");
+
+	warning(_("adding embedded git repository: %s"), name.buf);
+	if (advice_add_embedded_repo) {
+		advise(embedded_advice, name.buf, name.buf);
+		/* there may be multiple entries; advise only once */
+		advice_add_embedded_repo = 0;
+	}
+
+	strbuf_release(&name);
+}
+
 static int add_files(struct dir_struct *dir, int flags)
 {
 	int i, exit_status = 0;
@@ -307,12 +352,14 @@ static int add_files(struct dir_struct *dir, int flags)
 		exit_status = 1;
 	}
 
-	for (i = 0; i < dir->nr; i++)
+	for (i = 0; i < dir->nr; i++) {
+		check_embedded_repo(dir->entries[i]->name);
 		if (add_file_to_index(&the_index, dir->entries[i]->name, flags)) {
 			if (!ignore_add_errors)
 				die(_("adding files failed"));
 			exit_status = 1;
 		}
+	}
 	return exit_status;
 }
 
@@ -468,5 +515,7 @@ finish:
 			die(_("Unable to write new index file"));
 	}
 
+	UNLEAK(pathspec);
+	UNLEAK(dir);
 	return exit_status;
 }