feat(build): publish to OSSRH Snapshots and MavenCentral from GHA (#72)

* feat(build): publish to OSSRH Snapshots and MavenCentral from GHA

* renamed file and job

.github/actions/import-gpg-key/action.yml

@@ -0,0 +1,25 @@
+name: "Import GPG Key"
+description: "Imports a GPG key given in the input"
+inputs:
+  gpg-private-key:
+    required: true
+    description: "The GPG Private Key in plain text. Can be a sub-key."
+runs:
+  using: "composite"
+  steps:
+    # this is necessary because it creates gpg.conf, etc.
+    - name: List Keys
+      shell: bash
+      run: |
+        gpg -K --keyid-format=long
+
+    - name: Import GPG Private Key
+      shell: bash
+      run: |
+        echo "use-agent" >> ~/.gnupg/gpg.conf
+        echo "pinentry-mode loopback" >> ~/.gnupg/gpg.conf
+        echo -e "${{ inputs.gpg-private-key }}" | gpg --import --batch
+        for fpr in $(gpg --list-keys --with-colons | awk -F: '/fpr:/ {print $10}' | sort -u);
+        do
+          echo -e "5\\ny\\n" |  gpg --batch --command-fd 0 --expert --edit-key $fpr trust;
+        done

.github/workflows/_trigger-snapshot.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   trigger-workflow:
-    uses: eclipse-edc/.github/.github/workflows/trigger-snapshot.yml@main
+    uses: eclipse-edc/.github/.github/workflows/publish-snapshot.yml@main
     with:
       github_repository: ${{ github.repository }}
     secrets:

.github/workflows/publish-snapshot.yml

@@ -0,0 +1,55 @@
+name: "Publish Snapshot Build"
+
+on:
+  workflow_dispatch:
+  workflow_call:
+
+jobs:
+  secrets-presence:
+    name: "Check for required credentials"
+    runs-on: ubuntu-latest
+    outputs:
+      HAS_OSSRH: ${{ steps.secret-presence.outputs.HAS_OSSRH }}
+    steps:
+      - name: Check whether secrets exist
+        id: secret-presence
+        run: |
+          [ ! -z "${{ secrets.ORG_GPG_PASSPHRASE }}" ] &&
+          [ ! -z "${{ secrets.ORG_GPG_PRIVATE_KEY }}" ] &&
+          [ ! -z "${{ secrets.ORG_OSSRH_USERNAME }}" ] && echo "HAS_OSSRH=true" >> $GITHUB_OUTPUT
+          exit 0
+
+  Publish-Snapshot:
+    name: "Publish artefacts to OSSRH Snapshots"
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    needs: [ secrets-presence ]
+
+    if: |
+      needs.secrets-presence.outputs.HAS_OSSRH
+    steps:
+      # Set-Up
+      - uses: actions/checkout@v4
+
+      # Import GPG Key
+      - uses: eclipse-edc/.github/.github/actions/import-gpg-key@main
+        name: "Import GPG Key"
+        with:
+          gpg-private-key: ${{ secrets.ORG_GPG_PRIVATE_KEY }}
+
+      - uses: eclipse-edc/.github/.github/actions/setup-build@main
+      - name: "Publish snapshot version"
+        env:
+          OSSRH_PASSWORD: ${{ secrets.ORG_OSSRH_PASSWORD }}
+          OSSRH_USER: ${{ secrets.ORG_OSSRH_USERNAME }}
+        run: |-
+          VERSION=$(./gradlew properties -q | grep "version:" | awk '{print $2}')
+          if [[ $VERSION != *-SNAPSHOT ]]
+          then
+            echo "::warning file=gradle.properties::$VERSION is not a snapshot version - will not publish!"
+            exit 0
+          fi
+          echo "Publishing Version $VERSION to Sonatype"
+          ./gradlew publishToSonatype --no-parallel -Pversion=$VERSION -Psigning.gnupg.executable=gpg -Psigning.gnupg.passphrase="${{ secrets.ORG_GPG_PASSPHRASE }}"