run CI on GitHub Actions

.github/actions/nix-shell/action.yml

@@ -0,0 +1,23 @@
+name: "Prepare nix-shell"
+description:
+  Download cache, build nix-shell and potentially upload any new
+  derivations to cache
+
+inputs:
+  cachix_auth_token:
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+    - uses: cachix/install-nix-action@v22
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - uses: cachix/cachix-action@v12
+      with:
+        name: niteo-public
+        authToken: '${{ inputs.cachix_auth_token }}'
+
+    - name: Build nix-shell
+      shell: bash
+      run: nix-shell --run "echo 'nix-shell successfully entered'"

.github/actions/uncommitted-changes/action.yml

@@ -0,0 +1,16 @@
+name: "Uncommitted Changes"
+description:
+  Fail if any uncommitted changes are detected.
+
+runs:
+  using: "composite"
+  steps:
+    - uses: tj-actions/verify-changed-files@v14
+      id: verify-changed-files
+
+    - name: List all changed files tracked and untracked files
+      if: steps.verify-changed-files.outputs.files_changed == 'true'
+      shell: bash
+      run: |
+        echo "Changed files: ${{ steps.verify-changed-files.outputs.changed_files }}"
+        exit 1

.github/workflows/ci.yml

@@ -0,0 +1,58 @@
+# Run all tests, linters, code analysis and other QA tasks on
+# every push to main and PRs.
+#
+# To SSH into the runner to debug a failure, add the following step before
+# the failing step
+#    - uses: lhotari/action-upterm@v1
+#      with:
+#        limit-access-to-actor: true
+
+name: CI
+
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - main
+
+
+# Prevent multiple jobs running after fast subsequent pushes
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+
+  tests:
+    name: Tests
+
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/nix-shell
+        with:
+          cachix_auth_token: '${{ secrets.CACHIX_AUTH_TOKEN_PUBLIC }}'
+
+      - run: nix-shell --run "make lint all=true"
+
+      - run: nix-shell --run "make tests"
+
+      - run: nix-shell --run "make dist"
+
+      - uses: ./.github/actions/uncommitted-changes
+
+# yamllint disable
+# TODO: publishing workflow
+    # steps:
+    #   - checkout
+
+    #   - configure_nix
+
+    #   - run:
+    #       name: Authenticate with registry
+    #      command: echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" > ~/salarycalc/.npmrc
+
+    #   - run:
+    #       name: Publish the package to NPM
+    #      command: nix-shell --run "npm version --no-git-tag-version prerelease --preid $(date +%Y-%m-%dT%H-%M-%S) && make dist && npm publish"

.github/workflows/nix-gh-cache.yml

@@ -0,0 +1,43 @@
+# Build derivations for Linux and Apple Silicon and upload them to
+# Cachix
+
+name: Nix Cache
+
+on:
+  push:
+    paths:
+      - "**.nix"
+      - "**.lock"
+      - "**package.json"
+      - "**pyproject.toml"
+      - ".github/**.ya?ml"
+  workflow_dispatch:
+
+# Kill running jobs if a new commit is pushed to PR, or someone restarts
+# a job that is already running.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+
+  prime:
+    name: Prime Cachix
+
+    strategy:
+      # Keep building other OSes even if one fails
+      fail-fast: false
+      matrix:
+        # ubuntu-latest-16-cores: Hosted GHA Linux runner, larger than default
+        #    so that this job primes the cache as much as possible before
+        #    other jobs that depend on the cache start running
+        # macos-latest: Hosted GHA Intel-based MAC runner
+        # macos-m1: TODO, GitHub says they will be available in Q4
+        os: [ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/nix-shell
+        with:
+          cachix_auth_token: '${{ secrets.CACHIX_AUTH_TOKEN_PUBLIC }}'

Makefile

@@ -8,12 +8,16 @@ all: tests dist
 .PHONY: lock
 lock:
 	@rm -rf .venv/
-	@poetry lock
+	@poetry lock --no-update
 	@rm -rf .venv/
 	@rm -rf node_modules
 	@elm2nix convert > elm-srcs.nix
 	@elm2nix snapshot > registry.dat
 	@nix-shell --run true
+	@direnv reload
+	@echo "-e ." >> requirements.txt
+	@nix-build shell.nix -A inputDerivation | cachix push niteo
+	@rm result
 
 # Build distribution files and place them where they are expected
 .PHONY: dist
@@ -43,27 +47,15 @@ endif
 test: tests
 
 .PHONY: tests
-tests: coverage
-
-.PHONY: coverage
-coverage: verify-examples
-	@elm-coverage --report codecov
-
-.PHONY: verify-examples
-verify-examples:
+tests:
 	@elm-verify-examples
-
-.coverage/codecov.json: test
+	@elm-test
 
 # Run development server
 .PHONY: run
 run:
 	@parcel --global SalaryCalculator src/index.html
 
-.PHONY: codecov
-codecov: .coverage/codecov.json
-	@codecov --disable=gcov --file=.coverage/codecov.json
-
 
 # Fetch salaries, location factors and currencies from the Internet
 .PHONY: config