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Add CI.yml

Add CI.yml #4

Workflow file for this run

name: CI
on:
push:
branches: [ "master" ]
pull_request:
permissions:
contents: read
jobs:
test:
name: Build and test
runs-on: ubuntu-latest
env:
MIX_ENV: test
strategy:
fail-fast: false
matrix:
include:
- pair:
elixir: "1.16.3"
otp: "26.2.5.3"
- pair:
elixir: "1.17.3"
otp: "27.1"
lint: lint
steps:
- uses: actions/checkout@v4
- name: Set up Elixir
uses: erlef/setup-beam@main
with:
otp-version: ${{ matrix.pair.otp }}
elixir-version: ${{ matrix.pair.elixir }}
version-type: strict
- name: Restore dependencies cache
uses: actions/cache@v4
with:
path: deps
key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
restore-keys: ${{ runner.os }}-mix-
- run: mix deps.get --check-locked
- run: mix format --check-formatted
if: ${{ matrix.lint }}
- run: mix deps.unlock --check-unused
if: ${{ matrix.lint }}
- run: mix deps.compile
- run: mix compile --no-optional-deps --warnings-as-errors
if: ${{ matrix.lint }}
- run: mix test --slowest 5
if: ${{ ! matrix.lint }}
- run: mix test --slowest 5 --warnings-as-errors
if: ${{ matrix.lint }}