is_gear: add heuristic for .gear-less git repos

share/eterbuild/functions/common

@@ -316,10 +316,13 @@ get_root_git_dir()
         # FIXME: 1) can return / with good status 2) no one check status later
 }
 
-# Usage: is_gear [path_to_spec|dir_inside_git]
+# Usage: is_gear [path_to_spec_file|dir_inside_git]
 is_gear()
 {
-	get_gear_rules $@ >/dev/null
+	get_gear_rules "$1" >/dev/null && return
+	# HACK for repo without .gear dir (task-edu package)
+	local GITDIR="$(get_root_git_dir "$1")"
+	[ -f "$(echo "$GITDIR"/*.spec)" ] && return
 }
 
 get_packager()