Initial implementation

.github/CODEOWNERS

@@ -0,0 +1 @@
+* @heroku/languages

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "cargo"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"

.github/workflows/check_changelog.yml

@@ -0,0 +1,22 @@
+name: Check Changelog
+
+on:
+  pull_request:
+    types: [opened, reopened, labeled, unlabeled, synchronize]
+
+permissions:
+  contents: read
+
+jobs:
+  check-changelog:
+    runs-on: ubuntu-latest
+    if: |
+      !contains(github.event.pull_request.labels.*.name, 'skip changelog') &&
+      !contains(github.event.pull_request.labels.*.name, 'dependencies')
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Check that CHANGELOG is touched
+        run: |
+          git fetch origin ${{ github.base_ref }} --depth 1 && \
+          git diff remotes/origin/${{ github.base_ref }} --name-only | grep CHANGELOG.md

.github/workflows/ci.yml

@@ -0,0 +1,66 @@
+name: CI
+
+on:
+  push:
+    # Avoid duplicate builds on PRs.
+    branches:
+      - main
+  pull_request:
+
+permissions:
+  contents: read
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Update Rust toolchain
+        run: rustup update
+      - name: Rust Cache
+        uses: Swatinem/[email protected]
+      - name: Clippy
+        run: cargo clippy --all-targets --locked -- --deny warnings
+      - name: rustfmt
+        run: cargo fmt -- --check
+
+  unit-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Update Rust toolchain
+        run: rustup update
+      - name: Rust Cache
+        uses: Swatinem/[email protected]
+      - name: Run unit tests
+        run: cargo test --locked
+
+  integration-test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        builder: ["builder:22", "buildpacks:20"]
+    env:
+      INTEGRATION_TEST_CNB_BUILDER: heroku/${{ matrix.builder }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Install musl-tools
+        run: sudo apt-get install musl-tools --no-install-recommends
+      - name: Update Rust toolchain
+        run: rustup update
+      - name: Install Rust linux-musl target
+        run: rustup target add x86_64-unknown-linux-musl
+      - name: Rust Cache
+        uses: Swatinem/[email protected]
+      - name: Install Pack CLI
+        uses: buildpacks/github-actions/[email protected]
+      - name: Run integration tests
+        # Runs only tests annotated with the `ignore` attribute (which in this repo, are the integration tests).
+        run: cargo test --locked -- --ignored --test-threads 5

.gitignore

@@ -0,0 +1,3 @@
+__pycache__/
+target/
+.DS_Store

.vscode/extensions.json

@@ -0,0 +1,3 @@
+{
+  "recommendations": ["rust-lang.rust-analyzer"],
+}

.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+  "rust-analyzer.check.command": "clippy",
+  "rust-analyzer.imports.granularity.enforce": true,
+  "rust-analyzer.imports.granularity.group": "module",
+  "rust-analyzer.imports.prefix": "crate",
+}

CHANGELOG.md

@@ -0,0 +1,12 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Added
+
+- Initial implementation.