1 files changed, 58 insertions, 8 deletions

diff --git a/builtin/add.c b/builtin/add.c
index 9f53f020d0..e888fb8c5f 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"
@@ -17,6 +18,7 @@
 #include "revision.h"
 #include "bulk-checkin.h"
 #include "argv-array.h"
+#include "submodule.h"
 
 static const char * const builtin_add_usage[] = {
 	N_("git add [<options>] [--] <pathspec>..."),
@@ -135,7 +137,7 @@ static char *prune_directory(struct dir_struct *dir, struct pathspec *pathspec,
 			*dst++ = entry;
 	}
 	dir->nr = dst - dir->entries;
-	add_pathspec_matches_against_index(pathspec, seen);
+	add_pathspec_matches_against_index(pathspec, &the_index, seen);
 	return seen;
 }
 
@@ -248,6 +250,7 @@ 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;
@@ -281,6 +284,8 @@ 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(),
 };
 
@@ -294,6 +299,45 @@ 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;
@@ -306,12 +350,14 @@ 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;
 }
 
@@ -379,16 +425,19 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 	if (read_cache() < 0)
 		die(_("index file corrupt"));
 
+	die_in_unpopulated_submodule(&the_index, prefix);
+
 	/*
 	 * Check the "pathspec '%s' did not match any files" block
 	 * below before enabling new magic.
 	 */
 	parse_pathspec(&pathspec, 0,
 		       PATHSPEC_PREFER_FULL |
-		       PATHSPEC_SYMLINK_LEADING_PATH |
-		       PATHSPEC_STRIP_SUBMODULE_SLASH_EXPENSIVE,
+		       PATHSPEC_SYMLINK_LEADING_PATH,
 		       prefix, argv);
 
+	die_path_inside_submodule(&the_index, &pathspec);
+
 	if (add_new_files) {
 		int baselen;
 
@@ -400,7 +449,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 		}
 
 		/* This picks up the paths that are not tracked */
-		baselen = fill_directory(&dir, &pathspec);
+		baselen = fill_directory(&dir, &the_index, &pathspec);
 		if (pathspec.nr)
 			seen = prune_directory(&dir, &pathspec, baselen);
 	}
@@ -414,7 +463,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 		int i;
 
 		if (!seen)
-			seen = find_pathspecs_matching_against_index(&pathspec);
+			seen = find_pathspecs_matching_against_index(&pathspec, &the_index);
 
 		/*
 		 * file_exists() assumes exact match
@@ -436,8 +485,9 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 			     !file_exists(path))) {
 				if (ignore_missing) {
 					int dtype = DT_UNKNOWN;
-					if (is_excluded(&dir, path, &dtype))
-						dir_add_ignored(&dir, path, pathspec.items[i].len);
+					if (is_excluded(&dir, &the_index, path, &dtype))
+						dir_add_ignored(&dir, &the_index,
+								path, pathspec.items[i].len);
 				} else
 					die(_("pathspec '%s' did not match any files"),
 					    pathspec.items[i].original);