Update ubuntu version from 18.04 to 22.04 (#216)

* Update base image to ubuntu 22.04 and fix dependencies

* Replace python3 with python-is-python3

* Clear python cache and icons

* Remove build-essentials
Reduces docker image size from 467Mb to 485Mb

* Add libssl fix for Ubuntu 22.04

* Trigger build

* Add apt-get install flags

* Increase build timeout

* Install libssl1.1 and libssl1.0.0 from focal and bionic deb package repositories

* Install libssl directly from source

* Remove libssl1.0.0 from apt-get install

* Fix brotli compression by installing python-setuptools

* Update unityhub installation as apt-key is deprecated

* Add unstable unityhub distribution

* Increase build timeout

* Add python2 symlink

* Instal python2 for failed builds

* Downgrade gzip version

* Install python2 from python-setuptools

* Minor bug fix

.github/workflows/test.yml

@@ -356,7 +356,7 @@ jobs:
       #############
       - name: Build project
         uses: game-ci/unity-builder@main
-        timeout-minutes: 15
+        timeout-minutes: 35
         with:
           unityVersion: ${{ matrix.version }}
           customImage: editor:ubuntu-dev

images/ubuntu/base/Dockerfile

@@ -1,4 +1,4 @@
-ARG ubuntuImage="ubuntu:18.04"
+ARG ubuntuImage="ubuntu:22.04"
 FROM $ubuntuImage
 
 # Fixes a Gradle crash while building for Android on Unity 2019 when there are accented characters in environment variables
@@ -27,12 +27,12 @@ RUN apt-get -q update \
  libxss1 \
  cpio \
  lsb-release \
- python \
- python-setuptools \
  xvfb \
  xz-utils \
  && apt-get clean \
- && rm -rf /var/lib/apt/lists/*
+ && rm -rf /var/lib/apt/lists/* \
+ && rm -rf /usr/share/icons/* \
+ && rm -rf /usr/lib/python3.10/__pycache__/*
 
 # Toolbox
 RUN apt-get -q update \
@@ -52,14 +52,17 @@ RUN apt-get -q update \
 
 # libstdc++6 upgrade
 RUN apt-get -q update \
- && apt-get -q install -y --no-install-recommends software-properties-common \
- && add-apt-repository -y ppa:ubuntu-toolchain-r/test \
- && apt-get -q install -y --only-upgrade libstdc++6 \
- && add-apt-repository -y --remove ppa:ubuntu-toolchain-r/test \
- && apt-get -q remove -y --auto-remove software-properties-common \
+ && apt-get install -y --no-install-recommends --allow-downgrades \
+ libstdc++6 \
  && apt-get clean \
  && rm -rf /var/lib/apt/lists/*
 
+# Fix "No useable version of libssl" for Ubuntu 22.04
+# https://forum.unity.com/threads/workaround-for-libssl-issue-on-ubuntu-22-04.1271405/
+RUN wget http://security.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2_amd64.deb \
+ && dpkg -i libssl1.1_1.1.1f-1ubuntu2_amd64.deb \
+ && rm libssl1.1_1.1.1f-1ubuntu2_amd64.deb
+
 # Disable default sound card, which removes ALSA warnings
 RUN /bin/echo -e 'pcm.!default {\n\
     type plug\n\

images/ubuntu/editor/Dockerfile

@@ -85,7 +85,11 @@ RUN echo "$version-$module" | grep -q -v '^\(2019.3.[6-9]f\|2019.3.1[0-9]f\|2019
 #=======================================================================================
 RUN echo "$version-$module" | grep -q -v '^\(2020.1\|2020.2.0f\|2020.2.1f\).*-webgl' \
   && exit 0 \
-  || echo 'export GZIP=-f' >> /usr/bin/unity-editor.d/webgl-2020.1-2.sh
+  || : \
+  && wget https://old-releases.ubuntu.com/ubuntu/pool/main/g/gzip/gzip_1.6-5ubuntu2_amd64.deb \
+  && dpkg -i gzip_1.6-5ubuntu2_amd64.deb \
+  && rm gzip_1.6-5ubuntu2_amd64.deb \
+  && echo 'export GZIP=-f' >> /usr/bin/unity-editor.d/webgl-2020.1-2.sh
 
 
 ###########################
@@ -231,7 +235,7 @@ RUN echo "$module" | grep -q -v 'webgl' \
   && rm -rf /var/lib/apt/lists/*
 
 #=======================================================================================
-# [webgl, il2cpp] python python-setuptools build-essential clang
+# [webgl, il2cpp] build-essential clang
 #=======================================================================================
 RUN echo "$module" | grep -q -v '\(webgl\|linux-il2cpp\)' \
   && exit 0 \
@@ -244,7 +248,7 @@ RUN echo "$module" | grep -q -v '\(webgl\|linux-il2cpp\)' \
   && rm -rf /var/lib/apt/lists/*
 
 #=======================================================================================
-# [2019.x] libnotify4 libunwind-dev libssl1.0
+# [2019.x] libnotify4 libunwind-dev libssl1.0.0
 #=======================================================================================
 RUN echo "$version" | grep -q -v '^2019.' \
   && exit 0 \
@@ -253,9 +257,26 @@ RUN echo "$version" | grep -q -v '^2019.' \
   && apt-get -q install -y --no-install-recommends --allow-downgrades \
     libnotify4 \
     libunwind-dev \
-    libssl1.0  \
   && apt-get clean \
-  && rm -rf /var/lib/apt/lists/*
+  && rm -rf /var/lib/apt/lists/* \
+  # Install libssl1.0.0
+  && wget http://security.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.0.0_1.0.2g-1ubuntu4.20_amd64.deb \
+  && dpkg -i libssl1.0.0_1.0.2g-1ubuntu4.20_amd64.deb \
+  && rm libssl1.0.0_1.0.2g-1ubuntu4.20_amd64.deb
+
+#=======================================================================================
+# [2018.x/2019.x/2020.x/2021.1.x-webgl] python2
+#=======================================================================================
+
+RUN echo "$version-$module" | grep -q -v '^\(2018\|2019\|2020\|2021.1\).*webgl' \
+  && exit 0 \
+  || : \
+  && apt-get -q update \
+  && apt-get -q install -y --no-install-recommends --allow-downgrades \
+    python-setuptools \
+  && apt-get clean \
+  && rm -rf /var/lib/apt/lists/* \
+  && ln -s /usr/bin/python2 /usr/bin/python
 
 #=======================================================================================
 # [2018.x/2019.x/2020.1.x-webgl] support brotli compression for linux

images/ubuntu/hub/Dockerfile

@@ -9,9 +9,9 @@ RUN apt-get -q update \
 
 # Install Unity Hub
 # https://docs.unity3d.com/hub/manual/InstallHub.html#install-hub-linux
-RUN sh -c 'echo "deb https://hub.unity3d.com/linux/repos/deb stable main" > /etc/apt/sources.list.d/unityhub.list' \
- && sh -c 'echo "deb https://hub.unity3d.com/linux/repos/deb unstable main" > /etc/apt/sources.list.d/unityhub-beta.list' \
- && wget -qO - https://hub.unity3d.com/linux/keys/public | apt-key add - \
+RUN wget -qO - https://hub.unity3d.com/linux/keys/public | gpg --dearmor | tee /usr/share/keyrings/Unity_Technologies_ApS.gpg > /dev/null \
+ && sh -c 'echo "deb [signed-by=/usr/share/keyrings/Unity_Technologies_ApS.gpg] https://hub.unity3d.com/linux/repos/deb stable main" > /etc/apt/sources.list.d/unityhub.list' \
+ && sh -c 'echo "deb [signed-by=/usr/share/keyrings/Unity_Technologies_ApS.gpg] https://hub.unity3d.com/linux/repos/deb unstable main" > /etc/apt/sources.list.d/unityhub-beta.list' \
  && apt-get -q update \
  && apt-get -q install -y "unityhub=$hubVersion" \
  && apt-get clean