Add release CI

.github/workflows/ci.yml

@@ -1,6 +1,3 @@
-# "Borrowed" with permission from https://github.com/Jonxslays/piston_rs/blob/master/.github/workflows/ci.yml.
-# Thanks bud!
-
 name: CI
 
 on:

.github/workflows/release.yml

@@ -0,0 +1,46 @@
+name: Release
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  check-version:
+    name: Check version
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Check version
+        run: |
+          [[ $(grep -m 1 -oP 'version = "(.*)"' Cargo.toml | sed -rn 's/.*"(.*)"/v\1/p') == ${{ github.event.release.tag_name }} ]]
+
+  publish:
+    name: Publish release
+
+    runs-on: ubuntu-latest
+    needs: check-version
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install Rust (stable)
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+
+      - name: Login to crates.io
+        env:
+          TOKEN: ${{ secrets.CRATES_IO_TOKEN }}
+
+        run: cargo login $TOKEN
+
+      - name: Publish dry-run
+        run: cargo publish --dry-run
+
+      - name: Publish
+        run: cargo publish