Add github-actions

.github/workflows/gem-push.yml

@@ -0,0 +1,34 @@
+name: Ruby Gem
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - '*'
+  pull_request:
+    branches:
+      - '*'
+    types: [ opened, synchronize ]
+
+jobs:
+  build:
+    name: Build + Publish
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+    if: ${{ github.event_name == 'workflow_dispatch' || contains(github.ref, 'tags/v') }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Ruby 2.7
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 2.7
+      - name: push gem
+        uses: trocco-io/push-gem-to-gpr-action@v1
+        with:
+          language: java
+          gem-path: "./build/gems/*.gem"
+          github-token: "${{ secrets.GITHUB_TOKEN }}"

build.gradle

@@ -4,6 +4,7 @@ plugins {
     id "checkstyle"
     id "maven-publish"
     id "org.embulk.embulk-plugins" version "0.4.1"
+    id "com.palantir.git-version" version "0.12.3"
 }
 
 repositories {
@@ -12,9 +13,17 @@ repositories {
 }
 
 group = "io.trocco"
-version = "0.1.0"
 description = "Bigquery output for embulk"
 
+version = {
+    def vd = versionDetails()
+    if (vd.commitDistance == 0 && vd.lastTag ==~ /^v[0-9]+\.[0-9]+\.[0-9]+(\.[a-zA-Z0-9]+)?/) {
+        vd.lastTag.substring(1)
+    } else {
+        "0.0.0.${vd.gitHash}.pre"
+    }
+}()
+
 sourceCompatibility = 1.8
 targetCompatibility = 1.8