[PLATFORM-1418]: Migrate mix_unused_discoveries to GHA

.github/CODEOWNERS

@@ -0,0 +1 @@
+* @primait/shared-services

.github/dependabot.yml

@@ -0,0 +1,11 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: mix # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "daily"

.github/workflows/cd.yml

@@ -0,0 +1,39 @@
+name: CD
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup Elixir
+        uses: erlef/setup-beam@v1
+        with:
+          otp-version: '25'
+          elixir-version: '1.14'
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: setup hex
+        run: |
+          mix local.hex --force
+          mix local.rebar --force
+      - name: Get deps
+        run: mix deps.get
+      - name: Get version
+        run: |
+          VERSION=$(grep -m1 version mix.exs | cut -d'"' -f2)
+          echo "VERSION=$VERSION" >> $GITHUB_ENV
+      - name: Check version
+        if: ${{ github.event.release.tag_name != env.VERSION }}
+        run: |
+          echo "Github ref tag [${{ github.event.release.tag_name }}] is different from mix.exs version [${{ env.VERSION }}]"
+          exit 1
+      - name: Login to hex.pm
+        run: |
+          mix hex.config api_key "$HEX_AUTH_KEY"
+        env:
+          HEX_AUTH_KEY: ${{ secrets.HEX_AUTH_KEY }}
+      - name: Publish
+        run: mix hex.publish --yes

.github/workflows/ci.yml

@@ -0,0 +1,78 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  ci:
+    # Avoid duplicate jobs on PR from a branch on the same repo
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.event.pull_request.base.repo.full_name
+    runs-on: ubuntu-latest
+    env:
+      MIX_ENV: test
+    steps:
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: '25'
+          elixir-version: '1.14'
+
+      # Check out the code.
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      # Define how to cache deps. Restores existing cache if present.
+      - name: Cache deps
+        id: cache-deps
+        uses: actions/cache@v3
+        env:
+          cache-name: cache-elixir-deps
+        with:
+          path: deps
+          key: ${{ runner.os }}-mix-${{ env.cache-name }}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-mix-${{ env.cache-name }}-
+      # Define how to cache the `_build` directory.
+      # After the first run, this speeds up tests runs a lot.
+      # This includes not re-compiling our project's downloaded deps every run.
+      - name: Cache compiled build
+        id: cache-build
+        uses: actions/cache@v3
+        env:
+          cache-name: cache-compiled-build
+        with:
+          path: _build
+          key: ${{ runner.os }}-mix-${{ env.cache-name }}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-mix-${{ env.cache-name }}-
+            ${{ runner.os }}-mix-
+
+      # Conditionally bust the cache when job is re-run.
+      # Sometimes, we may have issues with incremental builds that are fixed by doing a full recompile.
+      # In order to not waste dev time on such trivial issues force a full recompile only on builds that are retried.
+      # See https://fly.io/docs/elixir/advanced-guides/github-actions-elixir-ci-cd/ for more infos
+      - name: Clean to rule out incremental build as a source of flakiness
+        if: github.run_attempt != '1'
+        run: |
+          mix deps.clean --all
+          mix clean
+      - name: Deps get
+        run: mix deps.get
+      - name: Dependencies Check
+        run: mix deps.unlock --check-unused
+      - name: Compiles without warnings
+        run: mix compile --warnings-as-errors
+      - name: Check Formatting
+        run: mix format --check-formatted
+      - name: Credo
+        run: mix credo -a --strict
+      - name: Test
+        run: mix test
+      - name: Dialyzer
+        run: mix dialyzer
+
+  alls-green:
+    if: always() && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.event.pull_request.base.repo.full_name)
+    runs-on: ubuntu-latest
+    needs:
+      - ci
+    steps:
+      - run: ${{ !contains(needs.*.result, 'failure') }}

.github/workflows/retire.yml

@@ -0,0 +1,44 @@
+on:
+  workflow_dispatch:
+    inputs:
+      reason:
+        description: Retire reason
+        required: true
+        default: invalid
+        type: choice
+        options:
+          - renamed
+          - deprecated
+          - security
+          - invalid
+          - other
+      message:
+        description: Retire message
+        required: true
+        default: Version has a breaking bug
+        type: string
+      version:
+        description: Version to retire
+        required: true
+        default: x.y.z
+        type: string
+
+jobs:
+  retire:
+    runs-on: ubuntu-latest
+    env:
+      MESSAGE: ${{ inputs.message }}
+      REASON: ${{ inputs.reason }}
+      VERSION: ${{ inputs.version }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: '24'
+          elixir-version: '1.13'
+      - run: echo "Attempting to retire version $VERSION"
+      - run: mix hex.config api_key "$HEX_AUTH_KEY"
+        env:
+          HEX_AUTH_KEY: ${{ secrets.HEX_AUTH_KEY }}
+      - run: mix hex.user whoami
+      - run: mix hex.retire mix_unused_discoveries "$VERSION" "$REASON" --message "$MESSAGE"