fix(circleci-orb): support non-existent bazelrc paths

Author: devversion

.circleci/config.yml

@@ -5,7 +5,7 @@ version: 2.1
 orbs:
   buildalert: oss-tools/buildalert@0.1.0
   win: circleci/windows@2.2.0
-  devinfra: angular/dev-infra@1.0.6
+  devinfra: angular/dev-infra@1.0.7
 
 # **Note**: When updating the beginning of the cache key, also update the cache key to match
 # the new cache key prefix. This allows us to take advantage of CircleCI's fallback caching.
@@ -79,9 +79,9 @@ commands:
   setup_bazel_config:
     description: 'Setting up Bazel configuration for CI'
     steps:
-      - run: echo "import %workspace%/.circleci/linux-bazel.rc" >> ./.bazelrc
+      - run: echo "import %workspace%/.circleci/linux-bazel.rc" >> ./.bazelrc.user
       - devinfra/setup-bazel-remote-exec:
-          bazelrc: .circleci/linux-bazel.rc
+          bazelrc: ./.bazelrc.user
 
   prepare_and_store_test_results:
     description: 'Prepare and upload test results'

circleci-orb/BUILD.bazel

@@ -2,7 +2,7 @@ load("@build_bazel_rules_nodejs//:index.bzl", "nodejs_binary")
 
 ORB_NAME = "angular/dev-infra"
 
-ORB_VERSION = "1.0.6"
+ORB_VERSION = "1.0.7"
 
 nodejs_binary(
     name = "pack_orb_script",

circleci-orb/scripts/setup-bazel-remote-exec/index.ts

@@ -28,12 +28,20 @@ async function main(bazelRcPath: string | undefined) {
   await fs.promises.writeFile(destPath, dec, 'utf8');
 
   if (bazelRcPath) {
-    let content = await fs.promises.readFile(bazelRcPath, 'utf8');
+    let content = await readFileGracefully(bazelRcPath);
     content += '\nbuild --config=remote';
     await fs.promises.writeFile(bazelRcPath, content, 'utf8');
   }
 }
 
+async function readFileGracefully(filePath: string): Promise<string> {
+  try {
+    return await fs.promises.readFile(filePath, 'utf8');
+  } catch {
+    return '';
+  }
+}
+
 main(process.env.BAZELRC_PATH).catch((e) => {
   console.error(e);
   process.exitCode = 1;