AK: Add LexicalPath::append and LexicalPath::join

This patch adds two new methods to LexicalPath.  LexicalPath::append
appends a new path component to a LexicalPath, and LexicalPath::join
constructs a new LexicalPath from one or more components.

Co-authored-by: Gunnar Beutner <gunnar@beutner.name>

1 files changed, 12 insertions, 0 deletions

diff --git a/AK/LexicalPath.h b/AK/LexicalPath.h
index 20ceadaa0a..e5c3b2d733 100644
--- a/AK/LexicalPath.h
+++ b/AK/LexicalPath.h
@@ -29,9 +29,21 @@ public:
 
     bool has_extension(const StringView&) const;
 
+    void append(String const& component);
+
     static String canonicalized_path(String);
     static String relative_path(String absolute_path, String const& prefix);
 
+    template<typename... S>
+    static LexicalPath join(String const& first, S&&... rest)
+    {
+        StringBuilder builder;
+        builder.append(first);
+        ((builder.append('/'), builder.append(forward<S>(rest))), ...);
+
+        return LexicalPath { builder.to_string() };
+    }
+
 private:
     void canonicalize();