Add Workflow for publishing PRs to the PR Maven repository (#9)

.github/workflows/check-pr.yml

@@ -8,6 +8,7 @@ on:
       - opened
       - reopened
       - ready_for_review
+      - synchronize
 
 jobs:
   get_versions:
@@ -32,5 +33,7 @@ jobs:
       version: ${{ matrix.version }}
       push_changed: false
       publish: false
-
-
+      # Publishing of PRs will only work correctly if we're only building a single one
+      # NOTE: There is no way to get the length of an array in Github Actions Expressions
+      # So the heuristic is: If it contains a comma, it's a list with more than one element.
+      publish_prs: ${{ !contains(needs.get_versions.outputs.versions, ',') }}

.github/workflows/check.yml

@@ -21,6 +21,10 @@ on:
         default: true
         required: false
         type: boolean
+      publish_prs:
+        default: false
+        required: false
+        type: boolean
     secrets:
       MAVEN_USER:
         required: false
@@ -118,6 +122,13 @@ jobs:
       with:
         name: neoform-${{ fromJson(steps.split_version.outputs.result).version_name }}
         path: build/distributions/*.zip
+    # This creates a "maven-publish" artifact that contains the results of a locally run publish task
+    # This artifact is picked up by the "publish-prs.yml" workflow for PRs and published to a temporary maven repository
+    - name: Publish artifacts for PR Publication
+      uses: neoforged/action-pr-publishing/upload@v1
+      if: ${{ inputs.publish_prs }}
+      with:
+        publishing-task: ":${{ fromJson(steps.split_version.outputs.result).version_name }}:publishAllPublicationsTo_githubPackages_PRsRepository -Ptype=${{ fromJson(steps.split_version.outputs.result).version_type }}"
     - name: Get Java Test Versions
       id: test_versions
       env:

.github/workflows/publish-prs.yml

@@ -0,0 +1,30 @@
+# File generated by the GradleUtils `setupGitHubActionsWorkflows` task, avoid modifying it directly
+# The template can be found at https://github.com/neoforged/GradleUtils/blob/a65628b0c89dec60b357ce3f8f6bfa62934b8357/src/actionsTemplate/resources/.github/workflows/publish-prs.yml
+
+name: Publish PRs to GitHub Packages
+
+on:
+  workflow_run:
+    workflows: [Check PRs]
+    types:
+      - completed
+  issue_comment:
+    types:
+      - edited
+  pull_request_target:
+    types:
+      - opened
+
+permissions:
+  packages: write
+
+jobs:
+  publish-prs:
+    if: true
+    uses: neoforged/actions/.github/workflows/publish-prs.yml@main
+    with:
+      artifact_base_path: net/neoforged/neoform/
+      uploader-workflow-name: "Check PRs"
+    secrets:
+      PR_PUBLISHING_GH_APP_ID: ${{ secrets.PR_PUBLISHING_GH_APP_ID }}
+      PR_PUBLISHING_GH_APP_KEY: ${{ secrets.PR_PUBLISHING_GH_APP_KEY }}