ci: Detect unused code with Periphery (#1401)

.github/workflows/ci.yml

@@ -15,6 +15,8 @@ jobs:
         with:
           access_token: ${{ github.token }}
       - uses: jdx/mise-action@v2
+        with:
+          cache: false
       - name: Checkout
         uses: actions/checkout@v2
       - name: Create test env

.github/workflows/periphery.yml

@@ -0,0 +1,35 @@
+name: CI workflow
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    name: Scan unused code
+    runs-on: [ self-hosted, iOS ]
+
+    steps:
+      - name: Cancel Previous Runs
+        uses: styfle/cancel-workflow-action@0.12.1
+        with:
+          access_token: ${{ github.token }}
+      - uses: jdx/mise-action@v2
+        with:
+          cache: false
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Periphery
+        id: periphery
+        run: ./scripts/periphery.sh
+      - uses: mshick/add-pr-comment@v2
+        with:
+          message: |
+            Found ${{ steps.periphery.outputs.unused_count }} unused code occurences
+            <details>
+              <summary>Expand</summary>
+              
+              ```
+              ${{ steps.periphery.outputs.detailed_output }}
+              ```
+            </details>

.github/workflows/uitests.yml

@@ -15,6 +15,8 @@ jobs:
         with:
           access_token: ${{ github.token }}
       - uses: jdx/mise-action@v2
+        with:
+          cache: false
       - name: Checkout
         uses: actions/checkout@v2
       - name: Create test env

.mise.toml

@@ -1,4 +1,5 @@
 [tools]
 tuist = '4.9.0'
+periphery = '2.18.0'
 swiftformat = '0.53.7'
-swiftlint = '0.54.0'
+swiftlint = '0.54.0'

.periphery.yml

@@ -0,0 +1,19 @@
+clean_build: true
+retain_objc_accessible: true
+retain_public: true
+schemes:
+- Infomaniak Mail
+- MailAppIntentsExtension
+- MailCore
+- MailCoreUI
+- MailNotificationServiceExtension
+- MailResources
+- MailShareExtension
+targets:
+- Infomaniak Mail
+- MailAppIntentsExtension
+- MailCore
+- MailNotificationServiceExtension
+- MailResources
+- MailShareExtension
+workspace: Mail.xcworkspace

scripts/periphery.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+eval "$($HOME/.local/bin/mise activate -C $SRCROOT bash --shims)"
+
+tuist install
+tuist generate -n
+
+
+# Perform the periphery scan and handle directory removal based on argument
+if [[ "$1" == "--full-dir" ]]; then
+    detailedOutput=$(periphery scan --quiet --enable-unused-import-analysis)
+else
+    detailedOutput=$(periphery scan --quiet --enable-unused-import-analysis | sed "s|$(pwd)/||g")
+fi
+
+unusedCount=$(wc -l <<< "$detailedOutput" | tr -d '[:space:]')
+
+echo "$detailedOutput"
+echo "Total unused instances $unusedCount"
+
+# Output script result to GITHUB_OUTPUT to get it in next step
+echo 'detailed_output<<EOF' >> $GITHUB_OUTPUT
+echo "$detailedOutput" >> $GITHUB_OUTPUT
+echo 'EOF' >> $GITHUB_OUTPUT
+
+echo "unused_count=$unusedCount" >> $GITHUB_OUTPUT