Add template path to CompilerException to enable rich debug features

Fixes #935

changelog/935.md

@@ -0,0 +1 @@
+- Add template path to CompilerException to enable rich debug features [#935](https://github.com/smarty-php/smarty/issues/935)

src/Compiler/CodeFrame.php

@@ -121,6 +121,6 @@ public function create(
 	 * @return string
 	 */
 	public function insertLocalVariables(): string {
-		return '$_smarty_current_dir = ' . var_export(dirname($this->_template->getSource()->getFilepath()), true) . ";\n";
+		return '$_smarty_current_dir = ' . var_export(dirname($this->_template->getSource()->getFilepath() ?? '.'), true) . ";\n";
 	}
 }

src/Compiler/Template.php

@@ -848,7 +848,7 @@ public function trigger_template_error($args = null, $line = null, $tagline = nu
 		$e = new CompilerException(
 			$error_text,
 			0,
-			$this->template->getSource()->getFullResourceName(),
+			$this->template->getSource()->getFilepath() ?? $this->template->getSource()->getFullResourceName(),
 			$line
 		);
 		$e->source = trim(preg_replace('![\t\r\n]+!', ' ', $match[$line - 1]));

src/Template/Source.php

@@ -271,11 +271,11 @@ public function getFullResourceName(): string {
 		return $this->type . ':' . $this->name;
 	}
 
-	public function getFilepath(): string {
+	public function getFilepath(): ?string {
 		if ($this->handler instanceof FilePlugin) {
 			return $this->handler->getFilePath($this->name, $this->smarty, $this->isConfig);
 		}
-		return '.';
+		return null;
 	}
 
 	public function isConfig(): bool {