vlib: filepath module

vlib/filepath/filepath.v

@@ -0,0 +1,36 @@
+module filepath
+
+import(
+	os
+	strings
+)
+
+// return the extension in the file `path`
+pub fn ext(path string) string {
+	pos := path.last_index_byte(`.`)
+	if pos != -1 {
+		return path[pos..]
+	}
+	return ''
+}
+
+// returns true if `path` is absolute
+pub fn is_abs(path string) bool {
+	$if windows {
+		return path[0] == `/` || // incase we're in MingGW bash
+			(path[0].is_letter() && path[1] == `:`)
+	}
+	return path[0] == `/`
+}
+
+// pass directories as parameters, returns path as string 
+// TODO use []string.join once ...string becomes "[]string"
+pub fn join(base string, dirs ...string) string {
+	mut path := strings.new_builder(50)
+	path.write(base.trim_right('\\/'))
+	for d in dirs {
+		path.write(os.path_separator)
+		path.write(d)
+	}
+	return path.str()
+}