Support custom memory limit (#102)

package.json

@@ -54,5 +54,17 @@
     "mz": "^2.4.0",
     "semver": "^5.3.0",
     "vscode-languageclient": "^3.0.3"
+  },
+  "contributes": {
+    "configuration": {
+      "properties": {
+        "php.memoryLimit": {
+          "type": "string",
+          "default": "-1",
+          "description": "The memory limit of the php language server. [Number][K|M|G]. Use '-1' to allow unlimited use of the RAM(default).",
+          "pattern": "^\\d+[KMG]?$"
+        }
+      }
+    }
   }
 }

src/extension.ts

@@ -12,6 +12,19 @@ export async function activate(context: vscode.ExtensionContext): Promise<void>
     const conf = vscode.workspace.getConfiguration('php');
     const executablePath = conf.get<string>('executablePath') || 'php';
 
+    const memoryLimit = conf.get<string>('memoryLimit') || '-1';
+
+    if (memoryLimit !== '-1' && !/^\d+[KMG]?$/.exec(memoryLimit)) {
+        const selected = await vscode.window.showErrorMessage(
+            'The memory limit you\'d provided is not numeric, nor "-1" nor valid php shorthand notation!',
+            'Open settings'
+        );
+        if (selected === 'Open settings') {
+            await vscode.commands.executeCommand('workbench.action.openGlobalSettings');
+        }
+        return;
+    }
+
     // Check path (if PHP is available and version is ^7.0.0)
     let stdout: string;
     try {
@@ -52,6 +65,7 @@ export async function activate(context: vscode.ExtensionContext): Promise<void>
         function spawnServer(...args: string[]): ChildProcess {
             // The server is implemented in PHP
             args.unshift(context.asAbsolutePath(path.join('vendor', 'felixfbecker', 'language-server', 'bin', 'php-language-server.php')));
+            args.push('--memory-limit=' + memoryLimit);
             const childProcess = spawn(executablePath, args);
             childProcess.stderr.on('data', (chunk: Buffer) => {
                 console.error(chunk + '');