af: Add Git hook for future iOS/macOS file changes [SDK-4698] (#351)

.githooks/pre-commit

@@ -0,0 +1,8 @@
+staged_files=($(git diff --staged --name-only --diff-filter=ACDRT -- auth0_flutter/darwin))
+
+# Only proceed if there are staged files from the 'darwin' directory
+if [ ${#staged_files[@]} -eq 0 ]; then
+    exit 0
+fi
+
+scripts/generate-symlinks.sh

DEVELOPMENT.md

@@ -2,6 +2,14 @@
 
 As a Flutter plugin can not be built as a standalone application, the only way to verify the compilation is to build the example application using `flutter build apk` or `flutter build ios` from inside `/auth0_flutter/example`.
 
+## Configuring git hooks
+
+The `.githooks` folder contains git hooks specific to this repository. To make sure these get called, after cloning run the following **from the repository root**:
+
+```sh
+git config core.hooksPath .githooks
+```
+
 ## Running package tests
 
 Run the unit tests for both packages using `flutter test` in **/auth0_flutter** and **/auth0_flutter_platform_interface** respectively.
@@ -30,4 +38,3 @@ With the environment variables defined, we can execute the integration tests usi
 ```
 ./gradlew connectedDebugAndroidTest
 ```
-

scripts/generate-symlinks.sh

@@ -0,0 +1,43 @@
+#!/bin/sh
+
+# This script generates symlinks for every file inside the 'darwin' directory
+# of the auth0_flutter package, to the 'ios' and 'macos' directories.
+# It's meant to be run from the repository root.
+
+set -euo pipefail
+
+repo_path=$(git rev-parse --show-toplevel)
+
+if [ "$repo_path" != $PWD ]; then
+    echo 'This script must be run from the repository root'
+    exit 1
+fi
+
+base_dir='auth0_flutter'
+darwin_dir='auth0_flutter/darwin'
+files=($(find "$darwin_dir" -type f -print))
+platforms=('ios' 'macos')
+
+for platform in "${platforms[@]}"; do
+    rm -rf "$base_dir/$platform"
+done
+
+for file in "${files[@]}"; do
+    for platform in "${platforms[@]}"; do
+        target_file=$(echo "$file" | sed "s/darwin/$platform/")
+        target_dir=$(dirname "$target_file")
+
+        mkdir -p "$target_dir"
+
+        case "$file" in
+            # If it's a .gitignore file, copy it
+            (*'.gitignore') cp -v "$file" "$target_dir" ;;
+            # Else symlink it
+            (*) ln -sv "$repo_path/$file" "$target_file" ;;
+        esac
+    done
+done
+
+for platform in "${platforms[@]}"; do
+    git add "$base_dir/$platform"
+done