Develop (fork) branch update #20

Workflow file for this run

.github/workflows/build_tests.yml at 33d2b8f

	# Contains jobs corresponding to build tests (such as verifying that certain targets build, including the app itself).

	name: Build Tests

	on:
	workflow_dispatch:
	pull_request:
	push:
	branches:
	# Push events on develop branch
	- develop

	concurrency:
	group: ${{ github.workflow }}-${{ github.event.pull_request.number \|\| github.run_id }}
	cancel-in-progress: true

	jobs:
	bazel_build_app:
	name: Build Binary with Bazel
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-20.04]
	env:
	ENABLE_CACHING: false
	CACHE_DIRECTORY: ~/.bazel_cache
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0

	- name: Set up JDK 11
	uses: actions/setup-java@v1
	with:
	java-version: 11

	- name: Set up Bazel
	uses: abhinavsingh/setup-bazel@v3
	with:
	version: 6.5.0

	- name: Set up build environment
	uses: ./.github/actions/set-up-android-bazel-build-environment

	# For reference on this & the later cache actions, see:
	# https://github.com/actions/cache/issues/239#issuecomment-606950711 &
	# https://github.com/actions/cache/issues/109#issuecomment-558771281. Note that these work
	# with Bazel since Bazel can share the most recent cache from an unrelated build and still
	# benefit from incremental build performance (assuming that actions/cache aggressively removes
	# older caches due to the 5GB cache limit size & Bazel's large cache size).
	- uses: actions/cache@v2
	id: cache
	with:
	path: ${{ env.CACHE_DIRECTORY }}
	key: ${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-binary-${{ github.sha }}
	restore-keys: \|
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-binary-
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-tests-
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-

	# This check is needed to ensure that Bazel's unbounded cache growth doesn't result in a
	# situation where the cache never updates (e.g. due to exceeding GitHub's cache size limit)
	# thereby only ever using the last successful cache version. This solution will result in a
	# few slower CI actions around the time cache is detected to be too large, but it should
	# incrementally improve thereafter.
	- name: Ensure cache size
	env:
	BAZEL_CACHE_DIR: ${{ env.CACHE_DIRECTORY }}
	run: \|
	# See https://stackoverflow.com/a/27485157 for reference.
	EXPANDED_BAZEL_CACHE_PATH="${BAZEL_CACHE_DIR/#\~/$HOME}"
	CACHE_SIZE_MB=$(du -smc $EXPANDED_BAZEL_CACHE_PATH \| grep total \| cut -f1)
	echo "Total size of Bazel cache (rounded up to MBs): $CACHE_SIZE_MB"
	# Use a 4.5GB threshold since actions/cache compresses the results, and Bazel caches seem
	# to only increase by a few hundred megabytes across changes for unrelated branches. This
	# is also a reasonable upper-bound (local tests as of 2021-03-31 suggest that a full build
	# of the codebase (e.g. //...) from scratch only requires a ~2.1GB uncompressed/~900MB
	# compressed cache).
	if [[ "$CACHE_SIZE_MB" -gt 4500 ]]; then
	echo "Cache exceeds cut-off; resetting it (will result in a slow build)"
	rm -rf $EXPANDED_BAZEL_CACHE_PATH
	fi

	- name: Configure Bazel to use a local cache
	env:
	BAZEL_CACHE_DIR: ${{ env.CACHE_DIRECTORY }}
	run: \|
	EXPANDED_BAZEL_CACHE_PATH="${BAZEL_CACHE_DIR/#\~/$HOME}"
	echo "Using $EXPANDED_BAZEL_CACHE_PATH as Bazel's cache path"
	echo "build --disk_cache=$EXPANDED_BAZEL_CACHE_PATH" >> $HOME/.bazelrc
	shell: bash

	- name: Check Bazel environment
	run: bazel info

	# See https://git-secret.io/installation for details on installing git-secret. Note that the
	# apt-get method isn't used since it's much slower to update & upgrade apt before installation
	# versus just directly cloning & installing the project. Further, the specific version
	# shouldn't matter since git-secret relies on a future-proof storage mechanism for secrets.
	# This also uses a different directory to install git-secret to avoid requiring root access
	# when running the git secret command.
	- name: Install git-secret (non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	shell: bash
	run: \|
	cd $HOME
	mkdir -p $HOME/gitsecret
	git clone https://github.com/sobolevn/git-secret.git git-secret
	cd git-secret && make build
	PREFIX="$HOME/gitsecret" make install
	echo "$HOME/gitsecret" >> $GITHUB_PATH
	echo "$HOME/gitsecret/bin" >> $GITHUB_PATH

	- name: Decrypt secrets (non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	env:
	GIT_SECRET_GPG_PRIVATE_KEY: ${{ secrets.GIT_SECRET_GPG_PRIVATE_KEY }}
	run: \|
	cd $HOME
	# NOTE TO DEVELOPERS: Make sure to never print this key directly to stdout!
	echo $GIT_SECRET_GPG_PRIVATE_KEY \| base64 --decode > ./git_secret_private_key.gpg
	gpg --import ./git_secret_private_key.gpg
	cd $GITHUB_WORKSPACE
	git secret reveal

	# Note that caching only works on non-forks.
	- name: Build Oppia binary (with caching, non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	env:
	BAZEL_REMOTE_CACHE_URL: ${{ secrets.BAZEL_REMOTE_CACHE_URL }}
	run: \|
	bazel build --remote_http_cache=$BAZEL_REMOTE_CACHE_URL --google_credentials=./config/oppia-dev-workflow-remote-cache-credentials.json -- //:oppia

	- name: Build Oppia binary (without caching, or on a fork)
	if: ${{ env.ENABLE_CACHING == 'false' \|\| github.event.pull_request.head.repo.full_name != 'oppia/oppia-android' }}
	run: \|
	bazel build -- //:oppia

	# Note that caching only works on non-forks.
	- name: Build Oppia KitKat binary (with caching, non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	env:
	BAZEL_REMOTE_CACHE_URL: ${{ secrets.BAZEL_REMOTE_CACHE_URL }}
	run: \|
	bazel build --remote_http_cache=$BAZEL_REMOTE_CACHE_URL --google_credentials=./config/oppia-dev-workflow-remote-cache-credentials.json -- //:oppia_kitkat

	- name: Build Oppia binary KitKat (without caching, or on a fork)
	if: ${{ env.ENABLE_CACHING == 'false' \|\| github.event.pull_request.head.repo.full_name != 'oppia/oppia-android' }}
	run: \|
	bazel build -- //:oppia_kitkat

	- name: Copy Oppia dev APKs for uploading
	run: \|
	cp $GITHUB_WORKSPACE/bazel-bin/oppia.apk /home/runner/work/oppia-android/oppia-android/

	- uses: actions/upload-artifact@v4
	with:
	name: oppia-bazel.apk
	path: /home/runner/work/oppia-android/oppia-android/oppia.apk

	build_oppia_dev_aab:
	name: Build Oppia AAB (developer flavors)
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-20.04]
	env:
	ENABLE_CACHING: false
	CACHE_DIRECTORY: ~/.bazel_cache
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0

	- name: Set up JDK 11
	uses: actions/setup-java@v1
	with:
	java-version: 11

	- name: Set up Bazel
	uses: abhinavsingh/setup-bazel@v3
	with:
	version: 6.5.0

	- name: Set up build environment
	uses: ./.github/actions/set-up-android-bazel-build-environment

	# For reference on this & the later cache actions, see:
	# https://github.com/actions/cache/issues/239#issuecomment-606950711 &
	# https://github.com/actions/cache/issues/109#issuecomment-558771281. Note that these work
	# with Bazel since Bazel can share the most recent cache from an unrelated build and still
	# benefit from incremental build performance (assuming that actions/cache aggressively removes
	# older caches due to the 5GB cache limit size & Bazel's large cache size).
	- uses: actions/cache@v2
	id: cache
	with:
	path: ${{ env.CACHE_DIRECTORY }}
	key: ${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-binary-${{ github.sha }}
	restore-keys: \|
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-binary-
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-tests-
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-

	# This check is needed to ensure that Bazel's unbounded cache growth doesn't result in a
	# situation where the cache never updates (e.g. due to exceeding GitHub's cache size limit)
	# thereby only ever using the last successful cache version. This solution will result in a
	# few slower CI actions around the time cache is detected to be too large, but it should
	# incrementally improve thereafter.
	- name: Ensure cache size
	env:
	BAZEL_CACHE_DIR: ${{ env.CACHE_DIRECTORY }}
	run: \|
	# See https://stackoverflow.com/a/27485157 for reference.
	EXPANDED_BAZEL_CACHE_PATH="${BAZEL_CACHE_DIR/#\~/$HOME}"
	CACHE_SIZE_MB=$(du -smc $EXPANDED_BAZEL_CACHE_PATH \| grep total \| cut -f1)
	echo "Total size of Bazel cache (rounded up to MBs): $CACHE_SIZE_MB"
	# Use a 4.5GB threshold since actions/cache compresses the results, and Bazel caches seem
	# to only increase by a few hundred megabytes across changes for unrelated branches. This
	# is also a reasonable upper-bound (local tests as of 2021-03-31 suggest that a full build
	# of the codebase (e.g. //...) from scratch only requires a ~2.1GB uncompressed/~900MB
	# compressed cache).
	if [[ "$CACHE_SIZE_MB" -gt 4500 ]]; then
	echo "Cache exceeds cut-off; resetting it (will result in a slow build)"
	rm -rf $EXPANDED_BAZEL_CACHE_PATH
	fi

	- name: Configure Bazel to use a local cache
	env:
	BAZEL_CACHE_DIR: ${{ env.CACHE_DIRECTORY }}
	run: \|
	EXPANDED_BAZEL_CACHE_PATH="${BAZEL_CACHE_DIR/#\~/$HOME}"
	echo "Using $EXPANDED_BAZEL_CACHE_PATH as Bazel's cache path"
	echo "build --disk_cache=$EXPANDED_BAZEL_CACHE_PATH" >> $HOME/.bazelrc
	shell: bash

	- name: Check Bazel environment
	run: bazel info

	# See https://git-secret.io/installation for details on installing git-secret. Note that the
	# apt-get method isn't used since it's much slower to update & upgrade apt before installation
	# versus just directly cloning & installing the project. Further, the specific version
	# shouldn't matter since git-secret relies on a future-proof storage mechanism for secrets.
	# This also uses a different directory to install git-secret to avoid requiring root access
	# when running the git secret command.
	- name: Install git-secret (non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	shell: bash
	run: \|
	cd $HOME
	mkdir -p $HOME/gitsecret
	git clone https://github.com/sobolevn/git-secret.git git-secret
	cd git-secret && make build
	PREFIX="$HOME/gitsecret" make install
	echo "$HOME/gitsecret" >> $GITHUB_PATH
	echo "$HOME/gitsecret/bin" >> $GITHUB_PATH

	- name: Decrypt secrets (non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	env:
	GIT_SECRET_GPG_PRIVATE_KEY: ${{ secrets.GIT_SECRET_GPG_PRIVATE_KEY }}
	run: \|
	cd $HOME
	# NOTE TO DEVELOPERS: Make sure to never print this key directly to stdout!
	echo $GIT_SECRET_GPG_PRIVATE_KEY \| base64 --decode > ./git_secret_private_key.gpg
	gpg --import ./git_secret_private_key.gpg
	cd $GITHUB_WORKSPACE
	git secret reveal

	# Note that caching only works on non-forks.
	- name: Build Oppia developer AAB (with caching, non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	env:
	BAZEL_REMOTE_CACHE_URL: ${{ secrets.BAZEL_REMOTE_CACHE_URL }}
	run: \|
	bazel build --remote_http_cache=$BAZEL_REMOTE_CACHE_URL --google_credentials=./config/oppia-dev-workflow-remote-cache-credentials.json -- //:oppia_dev

	- name: Build Oppia developer AAB (without caching, or on a fork)
	if: ${{ env.ENABLE_CACHING == 'false' \|\| github.event.pull_request.head.repo.full_name != 'oppia/oppia-android' }}
	run: \|
	bazel build -- //:oppia_dev

	# Note that caching only works on non-forks.
	- name: Build Oppia developer KitKat AAB (with caching, non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	env:
	BAZEL_REMOTE_CACHE_URL: ${{ secrets.BAZEL_REMOTE_CACHE_URL }}
	run: \|
	bazel build --remote_http_cache=$BAZEL_REMOTE_CACHE_URL --google_credentials=./config/oppia-dev-workflow-remote-cache-credentials.json -- //:oppia_dev_kitkat

	- name: Build Oppia developer KitKat AAB (without caching, or on a fork)
	if: ${{ env.ENABLE_CACHING == 'false' \|\| github.event.pull_request.head.repo.full_name != 'oppia/oppia-android' }}
	run: \|
	bazel build -- //:oppia_dev_kitkat

	build_oppia_alpha_aab:
	name: Build Oppia AAB (alpha flavors)
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-20.04]
	env:
	ENABLE_CACHING: false
	CACHE_DIRECTORY: ~/.bazel_cache
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0

	- name: Set up JDK 11
	uses: actions/setup-java@v1
	with:
	java-version: 11

	- name: Set up Bazel
	uses: abhinavsingh/setup-bazel@v3
	with:
	version: 6.5.0

	- name: Set up build environment
	uses: ./.github/actions/set-up-android-bazel-build-environment

	# For reference on this & the later cache actions, see:
	# https://github.com/actions/cache/issues/239#issuecomment-606950711 &
	# https://github.com/actions/cache/issues/109#issuecomment-558771281. Note that these work
	# with Bazel since Bazel can share the most recent cache from an unrelated build and still
	# benefit from incremental build performance (assuming that actions/cache aggressively removes
	# older caches due to the 5GB cache limit size & Bazel's large cache size).
	- uses: actions/cache@v2
	id: cache
	with:
	path: ${{ env.CACHE_DIRECTORY }}
	key: ${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-binary-${{ github.sha }}
	restore-keys: \|
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-binary-
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-tests-
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-

	# This check is needed to ensure that Bazel's unbounded cache growth doesn't result in a
	# situation where the cache never updates (e.g. due to exceeding GitHub's cache size limit)
	# thereby only ever using the last successful cache version. This solution will result in a
	# few slower CI actions around the time cache is detected to be too large, but it should
	# incrementally improve thereafter.
	- name: Ensure cache size
	env:
	BAZEL_CACHE_DIR: ${{ env.CACHE_DIRECTORY }}
	run: \|
	# See https://stackoverflow.com/a/27485157 for reference.
	EXPANDED_BAZEL_CACHE_PATH="${BAZEL_CACHE_DIR/#\~/$HOME}"
	CACHE_SIZE_MB=$(du -smc $EXPANDED_BAZEL_CACHE_PATH \| grep total \| cut -f1)
	echo "Total size of Bazel cache (rounded up to MBs): $CACHE_SIZE_MB"
	# Use a 4.5GB threshold since actions/cache compresses the results, and Bazel caches seem
	# to only increase by a few hundred megabytes across changes for unrelated branches. This
	# is also a reasonable upper-bound (local tests as of 2021-03-31 suggest that a full build
	# of the codebase (e.g. //...) from scratch only requires a ~2.1GB uncompressed/~900MB
	# compressed cache).
	if [[ "$CACHE_SIZE_MB" -gt 4500 ]]; then
	echo "Cache exceeds cut-off; resetting it (will result in a slow build)"
	rm -rf $EXPANDED_BAZEL_CACHE_PATH
	fi

	- name: Configure Bazel to use a local cache
	env:
	BAZEL_CACHE_DIR: ${{ env.CACHE_DIRECTORY }}
	run: \|
	EXPANDED_BAZEL_CACHE_PATH="${BAZEL_CACHE_DIR/#\~/$HOME}"
	echo "Using $EXPANDED_BAZEL_CACHE_PATH as Bazel's cache path"
	echo "build --disk_cache=$EXPANDED_BAZEL_CACHE_PATH" >> $HOME/.bazelrc
	shell: bash

	- name: Check Bazel environment
	run: bazel info

	# See https://git-secret.io/installation for details on installing git-secret. Note that the
	# apt-get method isn't used since it's much slower to update & upgrade apt before installation
	# versus just directly cloning & installing the project. Further, the specific version
	# shouldn't matter since git-secret relies on a future-proof storage mechanism for secrets.
	# This also uses a different directory to install git-secret to avoid requiring root access
	# when running the git secret command.
	- name: Install git-secret (non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	shell: bash
	run: \|
	cd $HOME
	mkdir -p $HOME/gitsecret
	git clone https://github.com/sobolevn/git-secret.git git-secret
	cd git-secret && make build
	PREFIX="$HOME/gitsecret" make install
	echo "$HOME/gitsecret" >> $GITHUB_PATH
	echo "$HOME/gitsecret/bin" >> $GITHUB_PATH

	- name: Decrypt secrets (non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	env:
	GIT_SECRET_GPG_PRIVATE_KEY: ${{ secrets.GIT_SECRET_GPG_PRIVATE_KEY }}
	run: \|
	cd $HOME
	# NOTE TO DEVELOPERS: Make sure to never print this key directly to stdout!
	echo $GIT_SECRET_GPG_PRIVATE_KEY \| base64 --decode > ./git_secret_private_key.gpg
	gpg --import ./git_secret_private_key.gpg
	cd $GITHUB_WORKSPACE
	git secret reveal

	# Note that caching only works on non-forks.
	- name: Build Oppia alpha AAB (with caching, non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	env:
	BAZEL_REMOTE_CACHE_URL: ${{ secrets.BAZEL_REMOTE_CACHE_URL }}
	run: \|
	bazel build --compilation_mode=opt --remote_http_cache=$BAZEL_REMOTE_CACHE_URL --google_credentials=./config/oppia-dev-workflow-remote-cache-credentials.json -- //:oppia_alpha

	- name: Build Oppia alpha AAB (without caching, or on a fork)
	if: ${{ env.ENABLE_CACHING == 'false' \|\| github.event.pull_request.head.repo.full_name != 'oppia/oppia-android' }}
	run: \|
	bazel build --compilation_mode=opt -- //:oppia_alpha

	# Note that caching only works on non-forks.
	- name: Build Oppia alpha KitKat AAB (with caching, non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	env:
	BAZEL_REMOTE_CACHE_URL: ${{ secrets.BAZEL_REMOTE_CACHE_URL }}
	run: \|
	bazel build --compilation_mode=opt --remote_http_cache=$BAZEL_REMOTE_CACHE_URL --google_credentials=./config/oppia-dev-workflow-remote-cache-credentials.json -- //:oppia_alpha_kitkat

	- name: Build Oppia alpha KitKat AAB (without caching, or on a fork)
	if: ${{ env.ENABLE_CACHING == 'false' \|\| github.event.pull_request.head.repo.full_name != 'oppia/oppia-android' }}
	run: \|
	bazel build --compilation_mode=opt -- //:oppia_alpha_kitkat

	build_oppia_beta_aab:
	name: Build Oppia AAB (beta flavor)
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-20.04]
	env:
	ENABLE_CACHING: false
	CACHE_DIRECTORY: ~/.bazel_cache
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0

	- name: Set up JDK 11
	uses: actions/setup-java@v1
	with:
	java-version: 11

	- name: Set up Bazel
	uses: abhinavsingh/setup-bazel@v3
	with:
	version: 6.5.0

	- name: Set up build environment
	uses: ./.github/actions/set-up-android-bazel-build-environment

	# For reference on this & the later cache actions, see:
	# https://github.com/actions/cache/issues/239#issuecomment-606950711 &
	# https://github.com/actions/cache/issues/109#issuecomment-558771281. Note that these work
	# with Bazel since Bazel can share the most recent cache from an unrelated build and still
	# benefit from incremental build performance (assuming that actions/cache aggressively removes
	# older caches due to the 5GB cache limit size & Bazel's large cache size).
	- uses: actions/cache@v2
	id: cache
	with:
	path: ${{ env.CACHE_DIRECTORY }}
	key: ${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-binary-${{ github.sha }}
	restore-keys: \|
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-binary-
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-tests-
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-

	# This check is needed to ensure that Bazel's unbounded cache growth doesn't result in a
	# situation where the cache never updates (e.g. due to exceeding GitHub's cache size limit)
	# thereby only ever using the last successful cache version. This solution will result in a
	# few slower CI actions around the time cache is detected to be too large, but it should
	# incrementally improve thereafter.
	- name: Ensure cache size
	env:
	BAZEL_CACHE_DIR: ${{ env.CACHE_DIRECTORY }}
	run: \|
	# See https://stackoverflow.com/a/27485157 for reference.
	EXPANDED_BAZEL_CACHE_PATH="${BAZEL_CACHE_DIR/#\~/$HOME}"
	CACHE_SIZE_MB=$(du -smc $EXPANDED_BAZEL_CACHE_PATH \| grep total \| cut -f1)
	echo "Total size of Bazel cache (rounded up to MBs): $CACHE_SIZE_MB"
	# Use a 4.5GB threshold since actions/cache compresses the results, and Bazel caches seem
	# to only increase by a few hundred megabytes across changes for unrelated branches. This
	# is also a reasonable upper-bound (local tests as of 2021-03-31 suggest that a full build
	# of the codebase (e.g. //...) from scratch only requires a ~2.1GB uncompressed/~900MB
	# compressed cache).
	if [[ "$CACHE_SIZE_MB" -gt 4500 ]]; then
	echo "Cache exceeds cut-off; resetting it (will result in a slow build)"
	rm -rf $EXPANDED_BAZEL_CACHE_PATH
	fi

	- name: Configure Bazel to use a local cache
	env:
	BAZEL_CACHE_DIR: ${{ env.CACHE_DIRECTORY }}
	run: \|
	EXPANDED_BAZEL_CACHE_PATH="${BAZEL_CACHE_DIR/#\~/$HOME}"
	echo "Using $EXPANDED_BAZEL_CACHE_PATH as Bazel's cache path"
	echo "build --disk_cache=$EXPANDED_BAZEL_CACHE_PATH" >> $HOME/.bazelrc
	shell: bash

	- name: Check Bazel environment
	run: bazel info

	# See https://git-secret.io/installation for details on installing git-secret. Note that the
	# apt-get method isn't used since it's much slower to update & upgrade apt before installation
	# versus just directly cloning & installing the project. Further, the specific version
	# shouldn't matter since git-secret relies on a future-proof storage mechanism for secrets.
	# This also uses a different directory to install git-secret to avoid requiring root access
	# when running the git secret command.
	- name: Install git-secret (non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	shell: bash
	run: \|
	cd $HOME
	mkdir -p $HOME/gitsecret
	git clone https://github.com/sobolevn/git-secret.git git-secret
	cd git-secret && make build
	PREFIX="$HOME/gitsecret" make install
	echo "$HOME/gitsecret" >> $GITHUB_PATH
	echo "$HOME/gitsecret/bin" >> $GITHUB_PATH

	- name: Decrypt secrets (non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	env:
	GIT_SECRET_GPG_PRIVATE_KEY: ${{ secrets.GIT_SECRET_GPG_PRIVATE_KEY }}
	run: \|
	cd $HOME
	# NOTE TO DEVELOPERS: Make sure to never print this key directly to stdout!
	echo $GIT_SECRET_GPG_PRIVATE_KEY \| base64 --decode > ./git_secret_private_key.gpg
	gpg --import ./git_secret_private_key.gpg
	cd $GITHUB_WORKSPACE
	git secret reveal

	# Note that caching only works on non-forks.
	- name: Build Oppia beta AAB (with caching, non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	env:
	BAZEL_REMOTE_CACHE_URL: ${{ secrets.BAZEL_REMOTE_CACHE_URL }}
	run: \|
	bazel build --compilation_mode=opt --remote_http_cache=$BAZEL_REMOTE_CACHE_URL --google_credentials=./config/oppia-dev-workflow-remote-cache-credentials.json -- //:oppia_beta

	- name: Build Oppia beta AAB (without caching, or on a fork)
	if: ${{ env.ENABLE_CACHING == 'false' \|\| github.event.pull_request.head.repo.full_name != 'oppia/oppia-android' }}
	run: \|
	bazel build --compilation_mode=opt -- //:oppia_beta

	build_oppia_ga_aab:
	name: Build Oppia AAB (GA flavor)
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-20.04]
	env:
	ENABLE_CACHING: false
	CACHE_DIRECTORY: ~/.bazel_cache
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0

	- name: Set up JDK 11
	uses: actions/setup-java@v1
	with:
	java-version: 11

	- name: Set up Bazel
	uses: abhinavsingh/setup-bazel@v3
	with:
	version: 6.5.0

	- name: Set up build environment
	uses: ./.github/actions/set-up-android-bazel-build-environment

	# For reference on this & the later cache actions, see:
	# https://github.com/actions/cache/issues/239#issuecomment-606950711 &
	# https://github.com/actions/cache/issues/109#issuecomment-558771281. Note that these work
	# with Bazel since Bazel can share the most recent cache from an unrelated build and still
	# benefit from incremental build performance (assuming that actions/cache aggressively removes
	# older caches due to the 5GB cache limit size & Bazel's large cache size).
	- uses: actions/cache@v2
	id: cache
	with:
	path: ${{ env.CACHE_DIRECTORY }}
	key: ${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-binary-${{ github.sha }}
	restore-keys: \|
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-binary-
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-tests-
	${{ runner.os }}-${{ env.CACHE_DIRECTORY }}-bazel-

	# This check is needed to ensure that Bazel's unbounded cache growth doesn't result in a
	# situation where the cache never updates (e.g. due to exceeding GitHub's cache size limit)
	# thereby only ever using the last successful cache version. This solution will result in a
	# few slower CI actions around the time cache is detected to be too large, but it should
	# incrementally improve thereafter.
	- name: Ensure cache size
	env:
	BAZEL_CACHE_DIR: ${{ env.CACHE_DIRECTORY }}
	run: \|
	# See https://stackoverflow.com/a/27485157 for reference.
	EXPANDED_BAZEL_CACHE_PATH="${BAZEL_CACHE_DIR/#\~/$HOME}"
	CACHE_SIZE_MB=$(du -smc $EXPANDED_BAZEL_CACHE_PATH \| grep total \| cut -f1)
	echo "Total size of Bazel cache (rounded up to MBs): $CACHE_SIZE_MB"
	# Use a 4.5GB threshold since actions/cache compresses the results, and Bazel caches seem
	# to only increase by a few hundred megabytes across changes for unrelated branches. This
	# is also a reasonable upper-bound (local tests as of 2021-03-31 suggest that a full build
	# of the codebase (e.g. //...) from scratch only requires a ~2.1GB uncompressed/~900MB
	# compressed cache).
	if [[ "$CACHE_SIZE_MB" -gt 4500 ]]; then
	echo "Cache exceeds cut-off; resetting it (will result in a slow build)"
	rm -rf $EXPANDED_BAZEL_CACHE_PATH
	fi

	- name: Configure Bazel to use a local cache
	env:
	BAZEL_CACHE_DIR: ${{ env.CACHE_DIRECTORY }}
	run: \|
	EXPANDED_BAZEL_CACHE_PATH="${BAZEL_CACHE_DIR/#\~/$HOME}"
	echo "Using $EXPANDED_BAZEL_CACHE_PATH as Bazel's cache path"
	echo "build --disk_cache=$EXPANDED_BAZEL_CACHE_PATH" >> $HOME/.bazelrc
	shell: bash

	- name: Check Bazel environment
	run: bazel info

	# See https://git-secret.io/installation for details on installing git-secret. Note that the
	# apt-get method isn't used since it's much slower to update & upgrade apt before installation
	# versus just directly cloning & installing the project. Further, the specific version
	# shouldn't matter since git-secret relies on a future-proof storage mechanism for secrets.
	# This also uses a different directory to install git-secret to avoid requiring root access
	# when running the git secret command.
	- name: Install git-secret (non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	shell: bash
	run: \|
	cd $HOME
	mkdir -p $HOME/gitsecret
	git clone https://github.com/sobolevn/git-secret.git git-secret
	cd git-secret && make build
	PREFIX="$HOME/gitsecret" make install
	echo "$HOME/gitsecret" >> $GITHUB_PATH
	echo "$HOME/gitsecret/bin" >> $GITHUB_PATH

	- name: Decrypt secrets (non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	env:
	GIT_SECRET_GPG_PRIVATE_KEY: ${{ secrets.GIT_SECRET_GPG_PRIVATE_KEY }}
	run: \|
	cd $HOME
	# NOTE TO DEVELOPERS: Make sure to never print this key directly to stdout!
	echo $GIT_SECRET_GPG_PRIVATE_KEY \| base64 --decode > ./git_secret_private_key.gpg
	gpg --import ./git_secret_private_key.gpg
	cd $GITHUB_WORKSPACE
	git secret reveal

	# Note that caching only works on non-forks.
	- name: Build Oppia GA AAB (with caching, non-fork only)
	if: ${{ env.ENABLE_CACHING == 'true' && github.event.pull_request.head.repo.full_name == 'oppia/oppia-android' }}
	env:
	BAZEL_REMOTE_CACHE_URL: ${{ secrets.BAZEL_REMOTE_CACHE_URL }}
	run: \|
	bazel build --compilation_mode=opt --remote_http_cache=$BAZEL_REMOTE_CACHE_URL --google_credentials=./config/oppia-dev-workflow-remote-cache-credentials.json -- //:oppia_ga

	- name: Build Oppia GA AAB (without caching, or on a fork)
	if: ${{ env.ENABLE_CACHING == 'false' \|\| github.event.pull_request.head.repo.full_name != 'oppia/oppia-android' }}
	run: \|
	bazel build --compilation_mode=opt -- //:oppia_ga

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Develop (fork) branch update #20

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