From c07fbf672d39c7e6801dbcf5722075c74949e401 Mon Sep 17 00:00:00 2001
From: Alan Agius <alanagius@google.com>
Date: Wed, 8 Feb 2023 18:26:50 +0000
Subject: [PATCH] ci: enable HTTP caching for Bazel on Windows

This commit enables Bazel HTTP caching for Windows runs.

Before:
```
bazel-e2e-cli-win: 22m 39s
```

After:
```
bazel-e2e-cli-win: 8m 32s
```
---
 .circleci/{bazel.rc => bazel.common.rc} |  0
 .circleci/bazel.linux.rc                |  5 +++++
 .circleci/bazel.windows.rc              |  8 ++++++++
 .circleci/dynamic_config.yml            | 16 +++++++++++++---
 4 files changed, 26 insertions(+), 3 deletions(-)
 rename .circleci/{bazel.rc => bazel.common.rc} (100%)
 create mode 100644 .circleci/bazel.linux.rc
 create mode 100644 .circleci/bazel.windows.rc

diff --git a/.circleci/bazel.rc b/.circleci/bazel.common.rc
similarity index 100%
rename from .circleci/bazel.rc
rename to .circleci/bazel.common.rc
diff --git a/.circleci/bazel.linux.rc b/.circleci/bazel.linux.rc
new file mode 100644
index 0000000000..6a4d30ed44
--- /dev/null
+++ b/.circleci/bazel.linux.rc
@@ -0,0 +1,5 @@
+# Import config items common to both Linux and Windows setups.
+# https://docs.bazel.build/versions/master/guide.html#bazelrc-syntax-and-semantics
+import %workspace%/.circleci/bazel.common.rc
+
+build --config=remote
diff --git a/.circleci/bazel.windows.rc b/.circleci/bazel.windows.rc
new file mode 100644
index 0000000000..c9cba94c10
--- /dev/null
+++ b/.circleci/bazel.windows.rc
@@ -0,0 +1,8 @@
+# Import config items common to both Linux and Windows setups.
+# https://docs.bazel.build/versions/master/guide.html#bazelrc-syntax-and-semantics
+import %workspace%/.circleci/bazel.common.rc
+
+build --remote_cache=https://storage.googleapis.com/angular-cli-windows-bazel-cache
+build --remote_accept_cached=true
+build --remote_upload_local_results=true
+build --google_default_credentials
diff --git a/.circleci/dynamic_config.yml b/.circleci/dynamic_config.yml
index 21fe18cc63..957ebe65d6 100644
--- a/.circleci/dynamic_config.yml
+++ b/.circleci/dynamic_config.yml
@@ -144,9 +144,19 @@ commands:
         type: env_var_name
         default: CIRCLE_PROJECT_REPONAME
     steps:
-      - run: sudo cp .circleci/bazel.rc /etc/bazel.bazelrc
+      - run:
+          name: 'Copy Bazel RC'
+          shell: bash
+          command: |
+            # Conditionally, copy bazel configuration based on the current VM
+            # operating system running. We detect Windows by checking for `%AppData%`.
+            if [[ -n "${APPDATA}" ]]; then
+              cp "./.circleci/bazel.windows.rc" ".bazelrc.user";
+            else
+              cp "./.circleci/bazel.linux.rc" ".bazelrc.user";
+            fi
       - devinfra/setup-bazel-remote-exec:
-          bazelrc: ./.bazelrc.user
+          shell: bash
 
   install_python:
     steps:
@@ -307,7 +317,6 @@ jobs:
     steps:
       - custom_attach_workspace
       - setup_bazel_rbe
-      - run: sudo cp .circleci/bazel.rc /etc/bazel.bazelrc
       - when:
           # The default nodeversion runs all *excluding* other versions
           condition:
@@ -454,6 +463,7 @@ jobs:
       - checkout
       - rebase_pr_win
       - setup_windows
+      - setup_bazel_rbe
       - restore_cache:
           keys:
             - *cache_key_win