Script to convert TypeScript files to JavaScript

ts2js.sh

#!/bin/bash

# Check if the correct number of arguments is provided
if [ "$#" -ne 2 ]; then
  echo "Usage: $0 source_folder target_folder"
  exit 1
fi

source_folder="$1"
target_folder="$2"

temp_folder="${source_folder}-temp"
temp_folder2="${source_folder}-temp2"

rm -rf "$temp_folder"
rm -rf "$temp_folder2"
rm -rf "$target_folder"

mkdir -p "$temp_folder"
mkdir -p "$temp_folder2"

# STEP 1: Take source files and replace blank lines with // BLANK LINE (since it won't survive compilation)
# Find all files in the source folder (including subfolders)
find "$source_folder" -type f -print0 | while IFS= read -r -d '' file; do
  # Get the relative path of the file
  rel_path=${file#"$source_folder"}

  # Remove leading slash (if any)
  rel_path=${rel_path#"/"}

  # Construct the output file path in the target folder
  output_file="$temp_folder/$rel_path"

  # Create the directory structure in the target folder if it doesn't exist
  mkdir -p "$(dirname "$output_file")"

  # Run the sed command to replace blank lines in the file and save the output to the target file
  sed 's|^$|// BLANK LINE|g' "$file" > "$output_file"
done

# STEP 2: Compile the files in the temp folder to the temp2 folder and convert them to JavaScript
echo '{"include": ["**/*.ts", "**/*.tsx"]}' > "${temp_folder}/tsconfig.json"
pushd "$temp_folder" || exit
npx tsc --outDir "../${temp_folder2}" --skipLibCheck --allowJs --jsx preserve --isolatedModules --module esnext --target esnext --moduleResolution nodenext --module nodenext
popd || exit

# STEP 3: Replace the // BLANK LINE comment and strip any leading blank lines from file
find "$temp_folder2" -type f -print0 | while IFS= read -r -d '' file; do
  rel_path=${file#"$temp_folder2"}
  rel_path=${rel_path#"/"}
  output_file="$target_folder/$rel_path"
  mkdir -p "$(dirname "$output_file")"

  # Run the sed command to replace blank line comment and strip leading blank lines
  sed -e 's|// BLANK LINE||g' -e '/./,$!d'  "$file" > "$output_file"
done

# STEP 4: Cleanup
rm -rf "$temp_folder"
rm -rf "$temp_folder2"