From d4467d13601e2282c3920b4a206a76a0416f320f Mon Sep 17 00:00:00 2001
From: Dustin Lam <dustinlam@google.com>
Date: Wed, 26 Jan 2022 17:27:32 -0800
Subject: [PATCH] Use exact version of NDK needed by presubmit in Github
 Actions

It is required to install ninja manually due to it not being included in
the virtual env provided by Github Actions runner.

See https://github.com/actions/virtual-environments/issues/741

In order for Ninja to be visible to CMake during NDK builds, it must be
installed in the same subdirectory, so for now it is symlinked on Linux
builds. See b/206099937

Fixes: 216535050
Test: Github CI
Change-Id: I1a741b1765822f0004adc3985b7babc8022046a5
---
 .github/workflows/presubmit.yml | 27 +++++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/presubmit.yml b/.github/workflows/presubmit.yml
index 3622a68d4dddd..716e2ce892e00 100644
--- a/.github/workflows/presubmit.yml
+++ b/.github/workflows/presubmit.yml
@@ -173,16 +173,35 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: "11"
+      # Required for CMake when building workmanager.
+      - name: "Install Ninja"
+        run: |
+          set -x
+          if [ "$RUNNER_OS" == "Linux" ]; then
+            # Should use version 1.10.2 but it is not available on apt yet.
+            sudo apt-get install ninja-build=1.10.0-1build1
+          elif [ "$RUNNER_OS" == "macOS" ]; then
+            # Shoudl use version 1.10.2, but it is not well supported by Homebrew.
+            brew install ninja
+          elif [ "$RUNNER_OS" == "Windows" ]; then
+            choco install ninja --version=1.10.2
+          else
+            echo "Failed to install ninja due to unsupport OS: $RUNNER_OS"
+            exit 1
+          fi
+          # See b/206099937. Hack needed to make ninja visible to cmake during NDK builds
+          if [ ! -e "/usr/local/bin/ninja" ]; then
+            ln -s "/usr/bin/ninja" "/usr/local/bin/ninja"
+          fi
 
       - name: "Set environment variables"
         shell: bash
         run: |
           set -x
           echo "DIST_DIR=$HOME/dist" >> $GITHUB_ENV
-          
-          # use latest NDK because the default NDK on github is older.
-          # TODO b/216535050: Implement task to install the exact AndroidX ndk version.
-          echo "ANDROID_NDK_ROOT=$ANDROID_NDK_LATEST_HOME" >> $GITHUB_ENV
+          # TODO b/216535050: Implement task to install the exact AndroidX ndk
+          # version in case it is not available.
+          echo "ANDROID_NDK_ROOT=$ANDROID_SDK_ROOT/ndk/23.1.7779620" >> $GITHUB_ENV
 
       - name: "Setup Gradle"
         uses: gradle/gradle-build-action@v2