ci: automatic release workflow

.github/scripts/package.sh

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+#!/usr/bin/env bash
+
+# from: https://github.com/EmbarkStudios/cargo-about/blob/7b08ebebf6b729a8e6e5227e9117617ee2b8003e/.github/scripts/package.sh
+set -eu
+
+# When run in a container, the ownership will be messed up, so mark the
+# checkout dir as safe regardless of our env
+git config --global --add safe.directory "$GITHUB_WORKSPACE"
+
+# Normally we'll only do this on tags, but add --always to fallback to the revision
+# if we're iterating or the like
+tag=$(git describe --tags --abbrev=0 --always)
+release_name="$NAME-$tag-$TARGET"
+release_tar="${release_name}.tar.gz"
+mkdir "$release_name"
+
+if [[ "$TARGET" =~ windows ]]; then
+    bin="$NAME.exe"
+else
+    bin="$NAME"
+fi
+
+cp "target/$TARGET/release/$bin" "$release_name/"
+cp README.md LICENSE "$release_name/"
+tar czf "$release_tar" "$release_name"
+
+rm -r "$release_name"
+
+# Windows environments in github actions don't have the gnu coreutils installed,
+# which includes the shasum exe, so we just use powershell instead
+if [[ "$TARGET" =~ windows ]]; then
+    echo "(Get-FileHash \"${release_tar}\" -Algorithm SHA256).Hash | Out-File -Encoding ASCII -NoNewline \"${release_tar}.sha256\"" | pwsh -c -
+else
+    echo -n "$(shasum -ba 256 "${release_tar}" | cut -d " " -f 1)" > "${release_tar}.sha256"
+fi

.github/workflows/release.yml

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+on:
+  push:
+    tags:
+      - 'v*.*.*'
+
+permissions:
+  contents: write
+  pull-requests: write
+
+name: Create release and publish binaries
+
+jobs:
+  generate-changelog:
+    name: Generate changelog
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Generate changelog
+        id: changelog
+        uses: requarks/changelog-action@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          tag: ${{ github.ref_name }}
+
+      - name: Upload changelog
+        uses: actions/upload-artifact@v2
+        with:
+          name: changelog
+          path: CHANGELOG.md
+
+      - name: Commit CHANGELOG.md
+        uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          branch: main
+          commit_message: "chore(main): release ${{ github.ref_name }}"
+          file_pattern: CHANGELOG.md
+
+  build-and-package:
+    name: Build and package binaries
+    needs: generate-changelog
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-gnu
+          - os: macos-latest
+            target: x86_64-apple-darwin
+          - os: windows-latest
+            target: x86_64-pc-windows-msvc
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          target: ${{ matrix.target }}
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Build
+        run: cargo build --release --target ${{ matrix.target }}
+
+      - name: Package
+        shell: bash
+        env:
+          NAME: gitrc-rs
+          TARGET: ${{ matrix.target }}
+        run: .github/scripts/package.sh
+
+      - name: Get changelog
+        uses: actions/download-artifact@v3
+        with:
+          name: changelog
+
+      - name: Create release
+        uses: softprops/action-gh-release@v1
+        with:
+          draft: false
+          make_latest: true
+          body_path: CHANGELOG.md
+          files: "gitrc-rs*"