Playwright extension added back to Dockerfile to resolve conditional fix Alpine (musl) based systems (#1087)

.github/test/Dockerfile-alpine

@@ -0,0 +1,31 @@
+# Taken from https://github.com/linuxserver/docker-changedetection.io/blob/main/Dockerfile
+# Test that we can still build on Alpine (musl modified libc https://musl.libc.org/)
+# Some packages wont install via pypi because they dont have a wheel available under this architecture.
+
+FROM ghcr.io/linuxserver/baseimage-alpine:3.16
+ENV PYTHONUNBUFFERED=1
+
+COPY requirements.txt /requirements.txt
+
+RUN \
+  apk add --update --no-cache --virtual=build-dependencies \
+    cargo \
+    g++ \
+    gcc \
+    libc-dev \
+    libffi-dev \
+    libxslt-dev \
+    make \
+    openssl-dev \
+    py3-wheel \
+    python3-dev \
+    zlib-dev && \
+  apk add --update --no-cache \
+    libxslt \
+    python3 \
+    py3-pip && \
+  echo "**** pip3 install test of changedetection.io ****" && \
+  pip3 install -U pip wheel setuptools && \
+  pip3 install -U --no-cache-dir --find-links https://wheel-index.linuxserver.io/alpine-3.16/ -r /requirements.txt && \
+  apk del --purge \
+    build-dependencies

.github/workflows/test-container-build.yml

@@ -43,6 +43,16 @@ jobs:
             version: latest
             driver-opts: image=moby/buildkit:master
 
+        # https://github.com/dgtlmoon/changedetection.io/pull/1067
+        # Check we can still build under alpine/musl
+        - name: Test that the docker containers can build (musl via alpine check)
+          id: docker_build_musl
+          uses: docker/build-push-action@v2
+          with:
+            context: ./
+            file: ./.github/test/Dockerfile-alpine
+            platforms: linux/amd64,linux/arm64
+
         - name: Test that the docker containers can build
           id: docker_build
           uses: docker/build-push-action@v2
@@ -53,3 +63,4 @@ jobs:
             platforms: linux/arm/v7,linux/arm/v6,linux/amd64,linux/arm64,
             cache-from: type=local,src=/tmp/.buildx-cache
             cache-to: type=local,dest=/tmp/.buildx-cache
+

Dockerfile

@@ -21,6 +21,11 @@ COPY requirements.txt /requirements.txt
 
 RUN pip install --target=/dependencies -r /requirements.txt
 
+# Playwright is an alternative to Selenium
+# Excluded this package from requirements.txt to prevent arm/v6 and arm/v7 builds from failing
+# https://github.com/dgtlmoon/changedetection.io/pull/1067 also musl/alpine (not supported)
+RUN pip install --target=/dependencies playwright~=1.26 \
+    || echo "WARN: Failed to install Playwright. The application can still run, but the Playwright option will be disabled."
 
 # Final image stage
 FROM python:3.8-slim

changedetectionio/run_all_tests.sh

@@ -38,6 +38,10 @@ unset WEBDRIVER_URL
 docker kill $$-test_selenium
 
 echo "TESTING WEBDRIVER FETCH > PLAYWRIGHT/BROWSERLESS..."
+# Not all platforms support playwright (not ARM/rPI), so it's not packaged in requirements.txt
+PLAYWRIGHT_VERSION=$(grep -i -E "RUN pip install.+" "$SCRIPT_DIR/../Dockerfile" | grep --only-matching -i -E "playwright[=><~+]+[0-9\.]+")
+echo "using $PLAYWRIGHT_VERSION"
+pip3 install "$PLAYWRIGHT_VERSION"
 docker run -d --name $$-test_browserless -e "DEFAULT_LAUNCH_ARGS=[\"--window-size=1920,1080\"]" --rm  -p 3000:3000  --shm-size="2g"  browserless/chrome:1.53-chrome-stable
 # takes a while to spin up
 sleep 5

requirements.txt

@@ -53,6 +53,6 @@ jinja2-time
 # https://peps.python.org/pep-0508/#environment-markers
 # https://github.com/dgtlmoon/changedetection.io/pull/1009
 jq~=1.3 ;python_version >= "3.8" and sys_platform == "linux"
-playwright~=1.26; python_version >= "3.8" and "arm" not in platform_machine and "aarch" not in platform_machine
 
+# playwright is installed at Dockerfile build time because it's not available on all platforms