nitpm: protect uninstall from deleting parent folders

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/src/nitpm.nit b/src/nitpm.nit
index 12fc960..c2dbe2d 100644 (file)
--- a/src/nitpm.nit
+++ b/src/nitpm.nit
@@ -262,7 +262,19 @@ class CommandUninstall
                end
 
                for name in args do
-                       var target_dir = nitpm_lib_dir / name
+
+                       var clean_nitpm_lib_dir = nitpm_lib_dir.simplify_path
+                       var target_dir = clean_nitpm_lib_dir / name
+
+                       # Check validity of the package to delete
+                       target_dir = target_dir.simplify_path
+                       var within_dir = target_dir.has_prefix(clean_nitpm_lib_dir + "/") and
+                               target_dir.length > clean_nitpm_lib_dir.length + 1
+                       var valid_name = name.length > 0 and name.chars.first.is_lower
+                       if not valid_name or not within_dir then
+                               print_error "Package name '{name}' is invalid"
+                               continue
+                       end
 
                        if not target_dir.file_exists or not target_dir.to_path.is_dir then
                                print_error "Package not found"