Add buildifier Json File Configuration

package.json

@@ -121,6 +121,12 @@
                     "markdownDescription": "The name of the Buildifier executable. This may be an absolute path, or a simple name that will be searched for on the system path. Paths starting with `@` are interpreted as Bazel targets and are run via `bazel run`. If empty, \"buildifier\" on the system path will be used.\n\nBuildifier can be downloaded from https://github.com/bazelbuild/buildtools/releases.",
                     "scope": "machine-overridable"
                 },
+                "bazel.buildifierConfigJsonPath": {
+                    "type": "string",
+                    "default": "",
+                    "markdownDescription": "The path of the Buildifier config json file, ex: `.buildifier.json`. This may be an absolute path, or a relative path within the workspace. If this option is unset, `buildifier` will automatically look for a `.buildifier.json` file in the workspace.",
+                    "scope": "machine-overridable"
+                },
                 "bazel.buildifierFixOnFormat": {
                     "type": "boolean",
                     "default": false,
@@ -461,4 +467,4 @@
         "vscode-uri": "^3.0.2",
         "which": "^4.0.0"
     }
-}
+}

src/buildifier/buildifier.ts

@@ -174,6 +174,18 @@ export function getDefaultBuildifierExecutablePath(): string {
   return buildifierExecutable;
 }
 
+/**
+ * Gets the path to the buildifier json configuration file specified by the
+ * workspace configuration, if present.
+ *
+ * @returns The path to the buildifier json configuration file specified in the
+ * workspace configuration, or an empty string if not present.
+ */
+export function getDefaultBuildifierJsonConfigPath(): string {
+  const bazelConfig = vscode.workspace.getConfiguration("bazel");
+  return bazelConfig.get<string>("buildifierConfigJsonPath");
+}
+
 /**
  * Executes buildifier with the given file content and arguments.
  *
@@ -191,6 +203,10 @@ export function executeBuildifier(
   return new Promise((resolve, reject) => {
     // Determine the executable
     let executable = getDefaultBuildifierExecutablePath();
+    const buildifierConfigJsonPath = getDefaultBuildifierJsonConfigPath();
+    if (buildifierConfigJsonPath.length !== 0) {
+      args = ["--config", buildifierConfigJsonPath, ...args];
+    }
     // Paths starting with an `@` are referring to Bazel targets
     if (executable.startsWith("@")) {
       const targetName = executable;