project: GitHub actions (#1577)

.github/workflows/gradle.yml

@@ -0,0 +1,23 @@
+name: RunelitePlus continuous integration
+
+on: [pull_request, push]
+
+jobs:
+  build:
+
+    runs-on: windows-latest
+
+    steps:
+      - uses: actions/checkout@v1
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+      - name: Assembling
+        run: gradlew assemble --console=plain
+      - name: Building
+        run: gradlew build --stacktrace -x test -x checkstyleMain --console=plain
+      - name: Testing
+        run: gradlew test --stacktrace --console=plain
+      - name: Checking code conventions
+        run: gradlew checkstyleMain --console=plain

.github/workflows/greetings.yml

@@ -0,0 +1,15 @@
+name: First pull request
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/first-interaction@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          pr-message: 'Thank you for contributing to RunelitePlus! Please make sure to join our [Discord](https://discord.gg/Q7wFtCe) and link your GitHub account to your discord account by sending `!ghauth` to our bot.'

.github/workflows/label.yml

@@ -0,0 +1,12 @@
+name: Pull request labeler
+on: [pull_request]
+
+jobs:
+  label:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/labeler@v2
+        with:
+          repo-token: "${{ secrets.GITHUB_TOKEN }}"

.github/workflows/stale.yml

@@ -0,0 +1,23 @@
+name: Mark stale issues and pull requests
+
+on:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  stale:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/stale@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-issue-message: 'Stale issue message'
+          stale-pr-message: 'Stale pull request message'
+          stale-issue-label: 'no-issue-activity'
+          stale-pr-label: 'no-pr-activity'
+          exempt-issue-label: 'awaiting-approval'
+          exempt-pr-label: 'awaiting-approval'
+          days-before-stale: 60
+          days-before-close: 30