Add sbt-github-actions for basic CI

.github/workflows/ci.yml

@@ -0,0 +1,47 @@
+# This file was automatically generated by sbt-github-actions using the
+# githubWorkflowGenerate task. You should add and commit this file to
+# your git repository. It goes without saying that you shouldn't edit
+# this file by hand! Instead, if you wish to make changes, you should
+# change your sbt build configuration to revise the workflow description
+# to meet your needs, then regenerate this file.
+
+name: Continuous Integration
+
+on:
+  pull_request:
+    branches: ['**']
+  push:
+    branches: ['**']
+    tags: [v*]
+
+env:
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+jobs:
+  build:
+    name: Build and Test
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        scala: [2.12.18]
+        java: [temurin@11]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout current branch (full)
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Setup Java (temurin@11)
+        if: matrix.java == 'temurin@11'
+        uses: actions/setup-java@v3
+        with:
+          distribution: temurin
+          java-version: 11
+          cache: sbt
+
+      - name: Check that workflows are up to date
+        run: sbt '++ ${{ matrix.scala }}' githubWorkflowCheck
+
+      - name: Build project
+        run: sbt '++ ${{ matrix.scala }}' test paradox

.github/workflows/clean.yml

@@ -0,0 +1,59 @@
+# This file was automatically generated by sbt-github-actions using the
+# githubWorkflowGenerate task. You should add and commit this file to
+# your git repository. It goes without saying that you shouldn't edit
+# this file by hand! Instead, if you wish to make changes, you should
+# change your sbt build configuration to revise the workflow description
+# to meet your needs, then regenerate this file.
+
+name: Clean
+
+on: push
+
+jobs:
+  delete-artifacts:
+    name: Delete Artifacts
+    runs-on: ubuntu-latest
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - name: Delete artifacts
+        run: |
+          # Customize those three lines with your repository and credentials:
+          REPO=${GITHUB_API_URL}/repos/${{ github.repository }}
+
+          # A shortcut to call GitHub API.
+          ghapi() { curl --silent --location --user _:$GITHUB_TOKEN "$@"; }
+
+          # A temporary file which receives HTTP response headers.
+          TMPFILE=/tmp/tmp.$$
+
+          # An associative array, key: artifact name, value: number of artifacts of that name.
+          declare -A ARTCOUNT
+
+          # Process all artifacts on this repository, loop on returned "pages".
+          URL=$REPO/actions/artifacts
+          while [[ -n "$URL" ]]; do
+
+            # Get current page, get response headers in a temporary file.
+            JSON=$(ghapi --dump-header $TMPFILE "$URL")
+
+            # Get URL of next page. Will be empty if we are at the last page.
+            URL=$(grep '^Link:' "$TMPFILE" | tr ',' '\n' | grep 'rel="next"' | head -1 | sed -e 's/.*<//' -e 's/>.*//')
+            rm -f $TMPFILE
+
+            # Number of artifacts on this page:
+            COUNT=$(( $(jq <<<$JSON -r '.artifacts | length') ))
+
+            # Loop on all artifacts on this page.
+            for ((i=0; $i < $COUNT; i++)); do
+
+              # Get name of artifact and count instances of this name.
+              name=$(jq <<<$JSON -r ".artifacts[$i].name?")
+              ARTCOUNT[$name]=$(( $(( ${ARTCOUNT[$name]} )) + 1))
+
+              id=$(jq <<<$JSON -r ".artifacts[$i].id?")
+              size=$(( $(jq <<<$JSON -r ".artifacts[$i].size_in_bytes?") ))
+              printf "Deleting '%s' #%d, %'d bytes\n" $name ${ARTCOUNT[$name]} $size
+              ghapi -X DELETE $REPO/actions/artifacts/$id
+            done
+          done

build.sbt

@@ -8,3 +8,15 @@ pekkoParadoxGithub := Some("https://github.com/apache/incubator-pekko-site")
 inConfig(Assets)(Seq(
   excludeFilter := excludeFilter.value -- ".htaccess"
 ))
+
+ThisBuild / githubWorkflowTargetTags ++= Seq("v*")
+ThisBuild / githubWorkflowPublishTargetBranches := Seq()
+
+ThisBuild / githubWorkflowJavaVersions := Seq(JavaSpec.temurin("11"))
+
+ThisBuild / githubWorkflowBuild := Seq(
+  WorkflowStep.Sbt(
+    List("test", "paradox"),
+    name = Some("Build project")
+  )
+)

project/plugins.sbt

@@ -2,3 +2,4 @@
 resolvers += "Apache Nexus Snapshots".at("https://repository.apache.org/content/repositories/snapshots/")
 
 addSbtPlugin("org.apache.pekko" % "pekko-sbt-paradox" % "0.0.0+43-d9643c78-SNAPSHOT")
+addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.15.0")