Fix WidevineCdm download (#578)

* implement new WidevineCdm extraction from crx3.

* fix widevinecdm folder.

* use m1k1o/go-crx3.

apps/ungoogled-chromium/Dockerfile

@@ -3,6 +3,8 @@ FROM $BASE_IMAGE
 
 ARG API_URL="https://api.github.com/repos/macchrome/linchrome/releases/latest"
 
+COPY ./widevinecdm.sh /widevine.sh
+
 #
 # install custom chromium build from woolyss with support for hevc/x265
 SHELL ["/bin/bash", "-c"]
@@ -21,11 +23,9 @@ RUN set -eux; apt-get update; \
     chmod 4755 /usr/lib/chromium/chrome-sandbox; \
     #
     # install widevine module
-    WIDEVINE_VERSION=$(wget --quiet -O - https://dl.google.com/widevine-cdm/versions.txt | sort --version-sort | tail -n 1); \
-    wget -O /tmp/widevine.zip "https://dl.google.com/widevine-cdm/${WIDEVINE_VERSION}-linux-x64.zip"; \
-    unzip -p /tmp/widevine.zip libwidevinecdm.so > /usr/lib/chromium/libwidevinecdm.so; \
-    chmod 644 /usr/lib/chromium/libwidevinecdm.so; \
-    rm /tmp/widevine.zip; \
+    CHROMIUM_DIR="/usr/lib/chromium"; \
+    ./widevine.sh "${CHROMIUM_DIR}/WidevineCdm"; \
+    rm -f /widevine.sh; \
     #
     # install latest version of uBlock Origin and SponsorBlock for YouTube
     CHROMIUM_VERSION="$(wget -O - "${API_URL}" 2>/dev/null | jq -r ".tag_name" | sed -e 's/v//' -e 's/-.*//')"; \

apps/ungoogled-chromium/widevinecdm.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+set -e
+
+TARGET_DIR="$(realpath "$1")"
+if [ -z "$TARGET_DIR" ]; then
+    echo "Usage: $0 /path/to/install/WidevineCdm"
+    exit 1
+fi
+
+TMPDIR=$(mktemp -d)
+cd "$TMPDIR"
+
+function cleanup {
+    rm -rf "$TMPDIR"
+}
+trap cleanup EXIT
+
+# Fetch manifest and extract URL
+URL=$(python3 -c "
+import json, urllib.request
+data = json.load(urllib.request.urlopen('https://raw.githubusercontent.com/mozilla/gecko-dev/master/toolkit/content/gmp-sources/widevinecdm.json'))
+for v in data['vendors'].values():
+    for k, p in v['platforms'].items():
+        if 'Linux_x86_64-gcc3' in k:
+            print(p['fileUrl'])
+            break
+")
+
+# Download CRX
+curl -L -o widevinecdm.crx "$URL"
+
+# Install go-crx3
+echo "Fetching latest go-crx3 version..."
+VERSION=$(curl -s https://api.github.com/repos/m1k1o/go-crx3/releases/latest | grep 'tag_name' | cut -d '"' -f4)
+ARTIFACT="go-crx3_${VERSION#v}_linux_amd64.tar.gz"
+URL="https://github.com/m1k1o/go-crx3/releases/download/${VERSION}/${ARTIFACT}"
+echo "Downloading $URL"
+curl -L -o "$ARTIFACT" "$URL"
+tar -xzf "$ARTIFACT"
+
+# Unpack with go-crx3
+./go-crx3 unpack widevinecdm.crx
+mkdir -p "$TARGET_DIR"
+cp -ar widevinecdm/* "$TARGET_DIR"