Switch to codespaces and remove gitpod support

.devcontainer/cmake/devcontainer.json

@@ -0,0 +1,14 @@
+{
+    "name": "Jumpstart cmake/docmake",
+    "image": "ghcr.io/langchr86/docmake@sha256:32d37fb9a637f0bd2b7860305a31e29ceb665f5f8f884b463a1da4d74cbf308d",
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "anwar.papyrus-pdf",
+                "lvm-vs-code-extensions.vscode-clangd",
+                "ms-vscode.cmake-tools",
+                "twxs.cmake"
+            ]
+        }
+    }
+}

.devcontainer/java/devcontainer.json

@@ -0,0 +1,17 @@
+{
+    "name": "Jumpstart java",
+    "image": "mcr.microsoft.com/devcontainers/java:dev-17-jdk-bookworm",
+    "features": {
+        "ghcr.io/devcontainers-contrib/features/maven-sdkman": {
+            "jdkVersion": "17",
+            "jdkDistro": "tem"
+        }
+    },
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "redhat.java",
+            ]
+        }
+    }
+}

.devcontainer/linux/devcontainer.json

@@ -0,0 +1,9 @@
+{
+    "name": "Jumpstart linux part",
+    "image": "mcr.microsoft.com/devcontainers/base:ubuntu-22.04",
+    "features": {
+        "ghcr.io/devcontainers/features/docker-in-docker:2": {
+            "dockerDashComposeVersion": "v2"
+        }
+    }
+}

.github/workflows/build-images.yml

@@ -0,0 +1,152 @@
+name: "build images"
+on:
+  workflow_dispatch:
+  workflow_call:
+  push:
+    paths:
+      - '.github/workflows/build-images.yml'
+      - '**/Dockerfile'
+      - 'docker-compose.yml'
+
+env:
+  DOCKER_BUILDKIT: 1
+  COMPOSE_DOCKER_CLI_BUILD: 1
+
+jobs:
+  build-info:
+    runs-on: ubuntu-latest
+    outputs:
+      repo-owner: ${{ steps.repo-owner.outputs.result }}
+      tags: ${{ steps.image-tags.outputs.image-tags }}
+      build-config: ${{ steps.build-info.outputs.result }}
+    steps:
+
+      #github forces lower case for the image name
+      - name: Get lowercase repo owner name
+        uses: actions/github-script@v7
+        id: repo-owner
+        with:
+          result-encoding: string
+          script: |
+            return context.repo.owner.toLowerCase()
+
+      - uses: actions/checkout@v4
+
+      - name: Set nightly tag if commit was on main
+        id: add-nightly-tag
+        if: startsWith(github.ref, 'refs/heads/main')
+        run: |
+          echo "nightly-tag=nightly" | tr -d "\n"  >> $GITHUB_OUTPUT
+
+      - name: Set latest tag if its a tag
+        id: add-latest-tag
+        if: startsWith(github.ref, 'refs/tags/')
+        run: |
+          echo "latest-tag=latest" | tr -d "\n"  >> $GITHUB_OUTPUT
+
+      - uses: actions/github-script@v7
+        id: get-tag
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          result-encoding: string
+          script: |
+            return context.payload.ref.replace('refs/tags/', '')
+
+      - name: concat tags to list
+        id: image-tags
+        run: |
+          TAGS=$(cat <<-END
+              [
+              "${{ github.sha }}",
+              "${{ steps.add-nightly-tag.outputs.nightly-tag }}",
+              "${{ steps.add-latest-tag.outputs.latest-tag }}",
+              "${{ steps.get-tag.outputs.result }}"
+              ]
+          END
+          )
+          TAGS=$(echo $TAGS | jq -c 'map(select(length > 0))')
+          echo "image-tags=$TAGS" | tr -d "\n"  >> $GITHUB_OUTPUT
+
+      - name: Get build info
+        id: build-info
+        run: |
+          set -x
+          sudo snap install yq
+
+          compose_paths=""
+          for i in $(find . -name docker-compose.yml); do 
+             compose_paths="$compose_paths -f $i"
+          done
+
+          docker compose $compose_paths config > /tmp/docker-compose.yml
+          yq_pipe='.services.[]'
+          yq_pipe=$yq_pipe'| select(.build != null)'
+          yq_pipe=$yq_pipe'| [.build * {"image": .image}]'
+          yq_pipe=$yq_pipe'| map(.dockerfile=.context + "/" + .dockerfile)'
+          BUILD_INFO=$(cat /tmp/docker-compose.yml | yq "$yq_pipe" -o=json)
+          BUILD_INFO=$(echo $BUILD_INFO | jq -c -s add | sed "s|:local||g")
+          echo "result=$BUILD_INFO" | tr -d "\n"  >> $GITHUB_OUTPUT
+        env:
+          REPO_OWNER: ${{ steps.repo-owner.outputs.result }}
+          VERSION: local
+
+  build-image:
+    runs-on: ubuntu-latest
+    needs:
+      - build-info
+    strategy:
+      fail-fast: false
+      matrix:
+        build-config: ${{ fromJSON(needs.build-info.outputs.build-config) }}
+    env:
+      tags: ${{ needs.build-info.outputs.tags }}
+      repo-owner: ${{ needs.build-info.outputs.repo-owner }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - run: |
+          echo "inputs:"
+          cat <<-HEREDOC
+          ${{ toJSON(inputs) }}
+          HEREDOC
+
+          echo "build config:"
+          cat <<-HEREDOC
+          ${{ toJSON(matrix.build-config) }}
+          HEREDOC
+
+          echo "build tags:"
+          cat <<-HEREDOC
+          ${{ env.tags }}
+          HEREDOC
+
+          echo "build repo owner:"
+          cat <<-HEREDOC
+          ${{ env.repo-owner }}
+          HEREDOC
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: actions/github-script@v7
+        id: expand-tags
+        with:
+          script: |
+            return JSON.parse('${{ env.tags }}').map(tag => `${{ matrix.build-config.image }}:${ tag }`)
+
+      - name: Build and push image
+        uses: docker/build-push-action@v5
+        with:
+          push: true
+          file: ${{ matrix.build-config.dockerfile }}
+          tags: ${{ join(fromJSON(steps.expand-tags.outputs.result)) }}
+          context: ${{ matrix.build-config.context }}
+          cache-from: type=gha,scope=${{ matrix.build-config.image }}
+          cache-to: type=gha,scope=${{ matrix.build-config.image }},mode=max

topics/linux/code/container/Dockerfile

@@ -0,0 +1,9 @@
+FROM registry.fedoraproject.org/fedora:39
+
+RUN dnf install -y \
+        systemd \
+        bash \
+        vim \
+    && dnf clean all
+
+CMD [ "/usr/sbin/init" ]

topics/linux/code/docker-compose.yml

@@ -0,0 +1,8 @@
+services:
+  systemd:
+    image:  ${REGISTRY:-ghcr.io}/${REPO_OWNER:-scs}/jumpstart-docs/fedora-systemd:${VERSION:-latest}
+    build: container
+    volumes:
+      - ./hello_world_service:/hello_world_service/hello_world_service
+      - ./solution:/hello_world_service/solution
+    privileged: true

topics/linux/code/solution/update-hello-world-service.sh

@@ -6,7 +6,7 @@ SCRIPT_DIR=$(dirname $(realpath $0))
 
 hello_world_versions_dir=$(realpath $SCRIPT_DIR/../hello_world_service)
 last_file=$(ls -t $hello_world_versions_dir | head -1)
-sudo service hello-world stop
+sudo systemctl stop hello-world
 sudo cp $hello_world_versions_dir/$last_file /usr/local/bin/hello-world
 sudo chmod +x /usr/local/bin/hello-world
-sudo service hello-world start
+sudo systemctl start hello-world

topics/linux/linux_exercise.md

@@ -119,6 +119,16 @@ Jetzt möchten wir, dass das hello-world Skript beim Aufstarten automatisch gest
 und die Meldungen ins journald schreibt.  
 Nutze für diese Übung vim.
 
+In Github Codespaces steht nicht direkt systemd zur Verfügung.
+Deshalb ist ein Container image vorbereitet, in dem wir systemd zur Verfügung haben.
+Führe deshalb folgende Befehle im ausgecheckten git repo auf Github Codespaces aus:
+
+```shell
+cd topics/linux/code
+docker compose up -d
+docker compose exec -it systemd bash
+```
+
 1. Erstelle deine Service Konfiguration in /etc/systemd/system/hello-world.service
 1. Starte den Service nach systemd-user-sessions.service
 1. Vergiss nicht den Service zu enablen
@@ -128,7 +138,8 @@ Nutze für diese Übung vim.
 1. Passe das update Script so an, dass es den Service vor dem Update des Skripts stoppt, und danach wieder startet.
 1. Teste mit journald, was der hello-world service ausgibt.
 1. Stoppe den service. Werden keine neuen Meldungen mehr ins journald geschrieben?
-1. Starte die VM neu, startet der Service auch neu?
+1. Starte den Container (von ausserhalb des containers) mit `docker compose restart systemd` neu.
+Startet der Service auch neu?
 1. Disable den Service nach dem Ende der Übung, du willst dein Log nicht füllen.
 
 <#ifdef solution>

topics/testing/testing_exercise.md

@@ -8,9 +8,6 @@ title: "Arbeitsblatt: Testing"
 Testing
 ===================================
 
-For a no effort setup (just github account needed), you can use Gitpod with a vscode editor in the browser.  
-[https://gitpod.io/#https://github.com/scs/jumpstart-docs](https://gitpod.io/#https://github.com/scs/jumpstart-docs)
-
 Leap Year
 --------