diff --git a/.github/workflows/comment-diffs.yml b/.github/workflows/comment-diffs.yml
new file mode 100644
index 000000000..bb171ec68
--- /dev/null
+++ b/.github/workflows/comment-diffs.yml
@@ -0,0 +1,306 @@
+name: Comment template diffs
+on:
+ workflow_dispatch:
+ pull_request:
+ branches:
+ - main
+ paths:
+ - '.github/workflows/comment-diffs.yml'
+ - 'packages/create-react-native-library/**'
+
+jobs:
+ generate-diffs-if-needed:
+ name: Generate diffs
+ runs-on: ubuntu-latest
+ steps:
+ - name: Checkout
+ uses: actions/checkout@v3
+
+ - name: Copy config matrix to persist it
+ run: |
+ mkdir ../configMatrix
+ cp ./.github/workflows/configMatrix.sh ../configMatrix/
+
+ - name: Setup Node.js
+ uses: actions/setup-node@v3
+ with:
+ node-version-file: .nvmrc
+
+ - name: Setup
+ uses: ./.github/actions/setup
+
+ - name: Build crnl
+ run: |
+ yarn workspace create-react-native-library prepare
+
+ - name: Create old version libraries
+ run: |
+ # Source all the configuration values to load $languages, $types, and $exclude
+ source ../configMatrix/configMatrix.sh
+
+ create_library() {
+ library_type=$1
+ language=$2
+
+ echo "Generating $library_type/$language"
+ path_prefix="../test/$library_type/$language"
+ target_path="$path_prefix/new-version"
+
+ npx create-react-native-library "$target_path" \
+ --slug @bob/react-native-test \
+ --description test \
+ --author-name test \
+ --author-email test@test \
+ --author-url https://test.test \
+ --repo-url https://test.test \
+ --type "$library_type" \
+ --languages "$language" \
+ --no-example \
+ --no-local
+
+ # Remove the .git folder of the created library
+ rm -rf "$target_path/.git"
+ }
+
+ for library_type in "${libraryTypes[@]}"; do
+ for language in "${languages[@]}"; do
+ if [[ ! "${exclude[*]}" =~ ${library_type}/${language} ]]; then
+ create_library "$library_type" "$language"
+ fi
+ done
+ done
+
+ - name: Setup
+ uses: ./.github/actions/setup
+
+ - name: Remove old build and build again
+ run: |
+ rm -rf ./packages/create-react-native-library/lib
+ yarn workspace create-react-native-library prepare
+
+ - name: Create library again
+ run: |
+ # Source all the configuration values to load $languages, $types, and $exclude
+ source ../configMatrix/configMatrix.sh
+
+ git fetch origin main
+ git checkout origin/main
+ git pull || true
+
+ create_library() {
+ library_type=$1
+ language=$2
+
+ echo "Running $library_type/$language"
+ path_prefix="../test/$library_type/$language"
+ target_path="$path_prefix/old-version"
+
+ npx create-react-native-library "$target_path" \
+ --slug @bob/react-native-test \
+ --description test \
+ --author-name test \
+ --author-email test@test \
+ --author-url https://test.test \
+ --repo-url https://test.test \
+ --type "$library_type" \
+ --languages "$language" \
+ --no-example \
+ --no-local
+
+ # Remove the .git folder of the created library
+ rm -rf "$target_path/.git"
+ }
+
+ for library_type in "${libraryTypes[@]}"; do
+ for language in "${languages[@]}"; do
+ if [[ ! "${exclude[*]}" =~ ${library_type}/${language} ]]; then
+ create_library "$library_type" "$language"
+ fi
+ done
+ done
+
+ - name: Remove everything in the working directory
+ run: for i in $(ls) ; do rm -rf "$i"; done;
+
+ - name: Create new empty repo
+ run: git init
+
+ - name: Create diffs
+ id: create-diffs
+ run: |
+ # Source all the configuration values to load $languages, $types, and $exclude
+ source ../configMatrix/configMatrix.sh
+
+ output_path="../outputs"
+ mkdir -p "$output_path"
+
+ # Set author
+ git config --global user.email "text@test.com"
+ git config --global user.name "create-react-native-library diff generator action"
+
+ function copy_commit_diff(){
+ library_type=$1
+ language=$2
+
+ output_file="$output_path/$library_type+$language.txt"
+
+ path_prefix="../test/$library_type/$language"
+ target_path_new_version="$path_prefix/new-version"
+ target_path_old_version="$path_prefix/old-version"
+
+ # Remove everything except the .git folder
+ for i in $(ls | grep -v ".git") ; do rm -rf "$i"; done;
+
+ # Copy the old version
+ cp -r "$target_path_old_version/." .
+
+ # Add all files and commit
+ git add -A || true
+
+ if git commit -qm "Automatic commit"; then
+ echo "Commit successful"
+ else
+ echo "No changes"
+ return
+ fi
+
+ # Remove everything except the .git folder
+ for i in $(ls | grep -v ".git") ; do rm -rf "$i"; done;
+
+ # Copy the new version
+ cp -r "$target_path_new_version/." .
+
+ # Add all files and commit
+ git add -A || true
+
+ if git commit -qm "Automatic commit"; then
+ echo "Commit successful"
+ else
+ echo "No changes"
+ return
+ fi
+
+ # Check if there is a diff
+ if git diff --quiet HEAD~; then
+ echo "No diff"
+ else
+ # Push the branches
+ # git push --set-upstream origin diffs
+
+ # Get new version remote commit hash
+ # new_version_commit_hash=$(git rev-parse --short origin/diffs)
+
+ # Get old version remote commit hash
+ # old_version_commit_hash=$(git rev-parse --short origin/diffs~)
+
+ # Add output to file
+ # echo "[$library_type/$language](https://github.com/${{github.repository}}/compare/$old_version_commit_hash..$new_version_commit_hash)" >> "$output_file"
+
+ # Write the diff to the output file
+ git diff HEAD~ >> $output_file
+ fi
+ }
+
+ for library_type in "${libraryTypes[@]}"; do
+ for language in "${languages[@]}"; do
+ if [[ ! "${exclude[*]}" =~ ${library_type}/${language} ]]; then
+ copy_commit_diff "$library_type" "$language"
+ fi
+ done
+ done
+
+ if ls $output_path/*.txt; then
+ echo "DIFF_IS_NON_EMPTY=1" >> $GITHUB_OUTPUT
+ else
+ echo "DIFF_IS_NON_EMPTY=0" >> $GITHUB_OUTPUT
+ fi
+
+ # Remove outputs folder in cwd if it exists
+ rm -rf ./outputs || true
+
+ # Copy the outputs to cwd
+ cp -r $output_path ./outputs
+
+ - uses: actions/upload-artifact@v3
+ if: ${{ steps.create-diffs.outputs.DIFF_IS_NON_EMPTY == '1' }}
+ with:
+ name: outputs
+ path: outputs/*.txt
+
+ read-artifacts-and-comment:
+ name: Read the artifacts and comment
+ runs-on: ubuntu-latest
+ needs: [generate-diffs-if-needed]
+ steps:
+ - name: Load outputs
+ uses: actions/download-artifact@v3
+ continue-on-error: true
+ with:
+ name: outputs
+ path: outputs
+
+ - name: Output artifacts
+ id: artifacts
+ run: |
+ if ls outputs/*.txt; then
+ result=1 # Artifacts are not empty
+ else
+ result=0 # Artifacts are empty
+ fi
+
+ echo "ARTIFACTS_ARE_NON_EMPTY=$result" >> $GITHUB_OUTPUT
+
+ - name: Comment on PR
+ if: ${{ steps.artifacts.outputs.ARTIFACTS_ARE_NON_EMPTY == '1' }}
+ uses: actions/github-script@v3
+ with:
+ github-token: ${{secrets.GITHUB_TOKEN}}
+ script: |
+ const fs = require('fs');
+
+ const replaceTable = {
+ "module-legacy": "Native module",
+ "module-mixed": "Turbo module with backward compat",
+ "module-new": "Turbo module",
+ "view-legacy": "Native view",
+ "view-mixed": "Fabric view with backward compat",
+ "view-new": "Fabric view",
+ "java-objc": "Java and Objective C",
+ "java-swift": "Java and Swift",
+ "kotlin-objc": "Kotlin and Objective C",
+ "kotlin-swift": "Kotlin and Swift",
+ ".txt": ""
+ }
+
+ const parsedArtifacts = fs.readdirSync('./outputs').map(fileName => {
+ const [type, language] = fileName.split("+");
+
+ const title = Object.entries(replaceTable).reduce((acc, [key, value]) => {
+ return acc.replace(new RegExp(key, "g"), value);
+ }, `${language} ${type}`);
+
+ const fileContents = fs.readFileSync(`./outputs/${fileName}`, 'utf8');
+
+ return `<details><summary>${title}</summary>\n\n\`\`\`diff\n${fileContents}\n\`\`\`\n</details>\n\n`;
+ })
+
+ const body = `🤓☝️ This PR changes the output of \`create-react-native-library\`. You can find the diffs of affected templates below:
+
+ ${parsedArtifacts.join("")}
+ `;
+
+ const comments = await github.issues.listComments({
+ issue_number: context.issue.number,
+ owner: context.repo.owner,
+ repo: context.repo.repo,
+ });
+ if (comments.data.some(comment => comment.body === body)) {
+ return;
+ }
+ github.issues.createComment({
+ issue_number: context.issue.number,
+ owner: context.repo.owner,
+ repo: context.repo.repo,
+ body
+ })
+
diff --git a/.github/workflows/configMatrix.sh b/.github/workflows/configMatrix.sh
new file mode 100644
index 000000000..f690f7dda
--- /dev/null
+++ b/.github/workflows/configMatrix.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# Source this file to set up the environment for the tests.
+
+export libraryTypes=(
+ module-legacy
+ module-mixed
+ module-new
+ view-legacy
+ view-mixed
+ view-new
+)
+
+export languages=(
+ java-objc
+ java-swift
+ kotlin-objc
+ kotlin-swift
+)
+
+export exclude=(
+ module-new/java-swift
+ module-new/kotlin-swift
+ module-mixed/java-swift
+ module-mixed/kotlin-swift
+ view-new/java-swift
+ view-new/kotlin-swift
+ view-mixed/java-swift
+ view-mixed/kotlin-swift
+)