feat(desktop): add devbox with kde

.github/workflows/ci.yaml

@@ -71,6 +71,57 @@ jobs:
             DEBIAN_SECURITY_MIRROR=${{ env.DEBIAN_SECURITY_MIRROR }}
           push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
 
+  build-desktop:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - stack: desktop
+            version: kde-focal
+    permissions:
+      contents: read
+      packages: write
+    env:
+      STACK: ${{ matrix.stack }}
+      VERSION: ${{ matrix.version }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ matrix.stack }}
+          tags: |
+            type=raw,value=${{ matrix.version }}
+            type=raw,value=${{ matrix.version }}-${{ github.ref_name }},enable=${{ startsWith(github.ref, 'refs/heads/') && github.ref != 'refs/heads/main' }}
+            type=ref,event=tag
+            type=raw,value=${{ matrix.version }}-${{ github.ref_name }},enable=${{ startsWith(github.ref, 'refs/tags/') }}
+            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        if: github.event_name == 'push'
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build (no push on PR)
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: docker/${{ matrix.stack }}/${{ matrix.version }}/Dockerfile
+          platforms: linux/amd64
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
+
   build-stacks:
     needs: build-base
     runs-on: ubuntu-latest

docker/desktop/kde-focal/Dockerfile

@@ -0,0 +1,74 @@
+FROM ubuntu:focal
+
+ARG S6_VER="2.0.0.1"
+ARG NO_VNC_VER="1.1.0"
+ARG WEB_SOCK_VER="0.9.0"
+
+RUN mkdir /_install
+
+## S6 Overlay
+ADD https://github.com/just-containers/s6-overlay/releases/download/v${S6_VER}/s6-overlay-amd64.tar.gz /_install
+RUN tar xzf /_install/s6-overlay-amd64.tar.gz -C / --exclude="./bin" && \
+    tar xzf /_install/s6-overlay-amd64.tar.gz -C /usr ./bin
+ENTRYPOINT ["/init"]
+
+
+## KDE
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt update && \
+    apt upgrade -y && \
+    apt install -y plasma-desktop
+RUN apt install -y dbus-x11
+
+
+## Other Applications
+RUN apt install -y dolphin konsole
+
+
+## VNC
+RUN apt install -y tigervnc-standalone-server tigervnc-xorg-extension
+ENV DISPLAY=:0 \
+    SCR_WIDTH=1600 \
+    SCR_HEIGHT=900
+EXPOSE 5900
+
+
+## NOVNC
+ADD https://github.com/novnc/noVNC/archive/v${NO_VNC_VER}.zip /_install
+ADD https://github.com/novnc/websockify/archive/v${WEB_SOCK_VER}.zip /_install
+RUN cd /_install && \
+    apt install -y unzip python3 python3-pip nginx gettext-base vim && \
+    ln -s /usr/bin/python3 /usr/bin/python && \
+    pip3 install numpy && \
+    unzip v${NO_VNC_VER}.zip && \
+    unzip v${WEB_SOCK_VER}.zip && \
+    mv noVNC-${NO_VNC_VER} /novnc && \
+    mv websockify-${WEB_SOCK_VER} /novnc/utils/websockify
+EXPOSE 8080
+ENV PATH_PREFIX=/ \
+    VNC_RESIZE=scale \
+    RECON_DELAY=250 \
+    PAGE_TITLE=KDE
+
+
+## USER
+ENV PGID=1000 \
+    PUID=1000 \
+    ROOT_PASSWORD=password \
+    HOME=/home/devbox
+RUN useradd -m -U -u 1000 -d "$HOME" -s /bin/bash devbox && \
+    usermod -aG users devbox
+WORKDIR /
+
+
+## All Dependencies Satisfied
+# RUN yes | unminimize
+COPY docker/desktop/kde-focal/_root /
+COPY docker/desktop/kde-focal/focal/root /
+
+
+# Cleanup
+RUN apt autoremove -y && \
+    apt clean && \
+    rm -r /_install
+

docker/desktop/kde-focal/_root/etc/cont-init.d/00--init-user.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/with-contenv bash
+
+set -eu
+set -o pipefail
+
+groupmod -o -g "$PGID" devbox
+usermod -o -u "$PUID" devbox
+echo "devbox:$ROOT_PASSWORD" | chpasswd
+echo "root:$ROOT_PASSWORD" | chpasswd
+
+
+# Link /root -> $HOME
+# for compatibility reasons
+if [[ "$PGID" -eq 0 ]] && [[ "$PUID" -eq 0 ]]
+then
+  if [[ ! -e "$HOME" ]]
+  then
+    ln -s /root "$HOME"
+  fi
+else
+  mkdir -p "$HOME"
+fi
+
+chown devbox:devbox "$HOME"

docker/desktop/kde-focal/_root/etc/cont-init.d/00-desktop.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/with-contenv bash
+
+set -eu
+set -o pipefail
+
+s6-setuidgid devbox mkdir -p "$HOME/Desktop"
+mkdir -p /misc/desktop
+mv /misc/desktop/* "$HOME/Desktop"

docker/desktop/kde-focal/_root/etc/cont-init.d/00-envsubst.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/with-contenv bash
+
+set -eu
+set -o pipefail
+
+if [ "$PATH_PREFIX" = "/" ]
+then
+  export SOCKET_PREFIX=""
+else
+  export SOCKET_PREFIX="$PATH_PREFIX"
+fi
+
+TEMP="$(envsubst '${PATH_PREFIX},${SOCKET_PREFIX}' < /etc/nginx/nginx.conf)"
+echo "$TEMP" > /etc/nginx/nginx.conf
+
+export PAGE_PREFIX="${SOCKET_PREFIX:1}/"
+TEMP="$(envsubst '${PAGE_PREFIX},${PAGE_TITLE},${RECON_DELAY},${VNC_RESIZE}' < /novnc/index.html)"
+echo "$TEMP" > /novnc/index.html

docker/desktop/kde-focal/_root/etc/nginx/nginx.conf

@@ -0,0 +1,33 @@
+daemon off;
+
+events { }
+
+http {
+
+  gzip on;
+  include /etc/nginx/mime.types;
+  default_type  application/octet-stream;
+
+  proxy_http_version 1.1;
+  proxy_set_header Upgrade $http_upgrade;
+  proxy_set_header Connection "Upgrade";
+  proxy_read_timeout 61s;
+  proxy_buffering off;
+
+  upstream vnc_proxy {
+    server 127.0.0.1:6080;
+  }
+
+  server {
+    listen 8080;
+    location ${SOCKET_PREFIX}/websockify {
+      proxy_pass http://vnc_proxy/;
+    }
+    location ${PATH_PREFIX} {
+      alias /novnc/;
+      index index.html;
+      try_files $uri $uri/ =404;
+    }
+  }
+
+}

docker/desktop/kde-focal/_root/etc/services.d/nginx/run

@@ -0,0 +1,10 @@
+#!/usr/bin/with-contenv bash
+
+set -eu
+set -o pipefail
+
+s6-svwait /var/run/s6/services/novnc
+
+
+exec /usr/sbin/nginx
+

docker/desktop/kde-focal/_root/etc/services.d/novnc/run

@@ -0,0 +1,10 @@
+#!/usr/bin/with-contenv bash
+
+set -eu
+set -o pipefail
+
+s6-svwait /var/run/s6/services/tigervnc
+
+
+exec s6-setuidgid devbox /novnc/utils/launch.sh
+

docker/desktop/kde-focal/_root/etc/services.d/tigervnc/run

@@ -0,0 +1,7 @@
+#!/usr/bin/with-contenv bash
+
+set -eu
+set -o pipefail
+
+exec s6-setuidgid devbox /usr/bin/Xvnc "$DISPLAY" -geometry "$SCR_WIDTH"x"$SCR_HEIGHT" -depth 24 -SecurityTypes none -AlwaysShared
+

docker/desktop/kde-focal/_root/etc/services.d/vncconfig/run

@@ -0,0 +1,10 @@
+#!/usr/bin/with-contenv bash
+
+set -eu
+set -o pipefail
+
+s6-svwait /var/run/s6/services/tigervnc
+
+
+exec s6-setuidgid devbox vncconfig -nowin
+

docker/desktop/kde-focal/_root/novnc/index.html

@@ -0,0 +1,26 @@
+<!doctype html>
+
+<html>
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>${PAGE_TITLE}</title>
+    <style>
+      body {
+        padding: 0;
+        margin: 0;
+      }
+      iframe {
+        width: 100vw;
+        height: 100vh;
+        border: none;
+      }
+    </style>
+  </head>
+
+  <body>
+    <iframe
+      src="vnc.html?path=${PAGE_PREFIX}websockify&resize=${VNC_RESIZE}&autoconnect=true&reconnect=true&reconnect_delay=${RECON_DELAY}">
+    </iframe>
+  </body>
+</html>

docker/desktop/kde-focal/focal/root/etc/cont-init.d/01-desktop.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/with-contenv bash
+
+set -eu
+set -o pipefail
+
+cat /usr/share/applications/org.kde.dolphin.desktop > "$HOME/Desktop/dolphin.desktop"
+cat /usr/share/applications/org.kde.konsole.desktop > "$HOME/Desktop/konsole.desktop"

docker/desktop/kde-focal/focal/root/etc/cont-init.d/01-nolock.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/with-contenv bash
+
+set -eu
+set -o pipefail
+
+s6-setuidgid devbox mkdir -p "$HOME/.config"
+s6-setuidgid devbox mv /misc/kscreenlockerrc "$HOME/.config/kscreenlockerrc"

docker/desktop/kde-focal/focal/root/etc/services.d/kde/run

@@ -0,0 +1,9 @@
+#!/usr/bin/with-contenv bash
+
+set -eu
+set -o pipefail
+
+s6-svwait /var/run/s6/services/tigervnc
+
+
+exec s6-setuidgid devbox /usr/bin/startplasma-x11

docker/desktop/kde-focal/focal/root/misc/kscreenlockerrc

@@ -0,0 +1,6 @@
+[$Version]
+update_info=kscreenlocker.upd:0.1-autolock
+
+[Daemon]
+Autolock=false
+LockOnResume=false

docker/desktop/kde-focal/focal/root/usr/lib/x86_64-linux-gnu/libexec/kf5/start_kdeinit_wrapper

@@ -0,0 +1,3 @@
+#!/usr/bin/with-contenv bash
+
+echo FAKE start_kdeinit_wrapper FAKE