Automatically release a binary (and dotslash file) (#42)

Summary:
This makes it much easier to use this repo from GitHub projects.

Pull Request resolved: #42

Test Plan:
Manually run action on my fork: https://github.com/bigfootjon/reindeer/actions/runs/8175293540

Which generates a release: https://github.com/bigfootjon/reindeer/releases

Downloading the dotslash file from that repo and running it works:

```
jonjanzen@jonjanzen-mbp Downloads % dotslash.oss reindeer --help
Usage: reindeer [OPTIONS] <COMMAND>

Commands:
  update    Update Cargo.lock with new dependencies
  vendor    Vendor crate needed for build
  buckify   Generate Buck build rules for Cargo packages
  auditsec  Show security report for vendored crates
  help      Print this message or the help of the given subcommand(s)

Options:
      --cargo-path <PATH>         Path to `cargo` command
      --rustc-path <PATH>         Path to `rustc` command
      --cargo-options <ARGUMENT>  Extra cargo options
      --third-party-dir <PATH>    Path to third-party dir [default: .]
  -h, --help                      Print help
```

Reviewed By: shayne-fletcher

Differential Revision: D54561053

Pulled By: bigfootjon

fbshipit-source-id: 6ce623ccd57f93ebdee62700eafe694a2fabb199

.github/dotslash-config.json

@@ -0,0 +1,29 @@
+{
+    "exclude-github-release-provider": true,
+    "outputs": {
+      "reindeer": {
+        "platforms": {
+          "macos-aarch64": {
+            "regex": "^reindeer-aarch64-apple-darwin.zst$",
+            "path": "reindeer-aarch64-apple-darwin"
+          },
+          "linux-aarch64": {
+            "regex": "^reindeer-aarch64-unknown-linux-musl.zst$",
+            "path": "reindeer-aarch64-unknown-linux-musl"
+          },
+          "macos-x86_64": {
+            "regex": "^reindeer-x86_64-apple-darwin.zst$",
+            "path": "reindeer-x86_64-apple-darwin"
+          },
+          "windows-x86_64": {
+            "regex": "^reindeer-x86_64-pc-windows-msvc.exe.zst$",
+            "path": "reindeer-x86_64-pc-windows-msvc.exe"
+          },
+          "linux-x86_64": {
+            "regex": "^reindeer-x86_64-unknown-linux-musl.zst$",
+            "path": "reindeer-x86_64-unknown-linux-musl"
+          }
+        }
+      }
+    }
+  }

.github/workflows/release.yml

@@ -0,0 +1,125 @@
+on:
+  push:
+    tags:
+      # Only match TagIt tags, which always start with this prefix
+      - 'v20*'
+  workflow_dispatch:
+
+name: Publish Release
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        target:
+          - os: 'ubuntu-22.04'
+            triple: 'aarch64-unknown-linux-gnu'
+            cross: true
+          - os: 'ubuntu-22.04'
+            triple: 'aarch64-unknown-linux-musl'
+            cross: true
+          - os: 'ubuntu-22.04'
+            triple: 'x86_64-unknown-linux-gnu'
+          - os: 'ubuntu-22.04'
+            triple: 'x86_64-unknown-linux-musl'
+            cross: true
+          - os: 'macos-14'
+            triple: 'aarch64-apple-darwin'
+          - os: 'macos-12'
+            triple: 'x86_64-apple-darwin'
+          - os: 'windows-2022'
+            triple: 'x86_64-pc-windows-msvc'
+            is_windows: true
+    runs-on: ${{ matrix.target.os }}
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      # This makes sure that this executable is portable:
+      - name: Vendor openssl
+        run: cargo add openssl-sys -F vendored
+        if: ${{ !matrix.target.is_windows }}
+      - uses: SebRollen/[email protected]
+        id: read_rust_toolchain
+        with:
+          file: 'rust-toolchain'
+          field: 'toolchain.channel'
+      - uses: dtolnay/rust-toolchain@v1
+        with:
+          toolchain: ${{ steps.read_rust_toolchain.outputs.value }}
+          targets: ${{ matrix.target.triple }}
+      - uses: Swatinem/rust-cache@v2
+        with:
+          prefix-key: reindeer-upload
+          key: ${{ matrix.target.triple }}
+      - uses: actions-rs/[email protected]
+        if: matrix.target.cross
+        with:
+          crate: cross
+          version: latest
+      - name: Set variables
+        id: set_variables
+        shell: bash
+        run: |
+          if [ -n "${{ matrix.target.is_windows }}" ]; then
+            echo "cargo_out=target/${{ matrix.target.triple }}/release/reindeer.exe" >> "$GITHUB_OUTPUT"
+            echo "reindeer_zst=artifacts/reindeer-${{ matrix.target.triple }}.exe.zst" >> "$GITHUB_OUTPUT"
+          else
+            echo "cargo_out=target/${{ matrix.target.triple }}/release/reindeer" >> "$GITHUB_OUTPUT"
+            echo "reindeer_zst=artifacts/reindeer-${{ matrix.target.triple }}.zst" >> "$GITHUB_OUTPUT"
+          fi
+      - name: Build
+        shell: bash
+        env:
+          RUSTFLAGS: "-C strip=debuginfo -C codegen-units=1"
+        run: |
+          if [ -n "${{ matrix.target.cross }}" ]; then
+            CARGO=cross
+          else
+            CARGO=cargo
+          fi
+          $CARGO build --locked --release --bin reindeer --target ${{ matrix.target.triple }}
+      - name: Move binary to artifacts/
+        shell: bash
+        run: |
+          mkdir artifacts
+          zstd -z ${{ steps.set_variables.outputs.cargo_out }} -o ${{ steps.set_variables.outputs.reindeer_zst }}
+      - name: Upload
+        uses: actions/upload-artifact@v3
+        with:
+          name: reindeer-${{ matrix.target.triple }}
+          path: ${{ steps.set_variables.outputs.reindeer_zst }}
+
+  release:
+    needs:
+      - build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - shell: bash
+        run: |
+          mkdir -p ${{github.workspace}}/artifacts
+      - uses: actions/download-artifact@v3
+        with:
+          path: ${{github.workspace}}/artifacts
+      - name: Display structure of downloaded files
+        shell: bash
+        run: |
+          ls -R artifacts
+      - uses: pyTooling/Actions/releaser@adef08d3bdef092282614f3b683897cefae82ee3 # v0.4.6
+        id: upload_attempt_1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          tag: '${{ github.ref_name }}'
+          files: ${{ github.workspace }}/artifacts/**
+          rm: false # do not clean past assets
+      - uses: facebook/dotslash-publish-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          config: .github/dotslash-config.json
+          tag: '${{ github.ref_name }}'