Bash script to generate a test ZIP archive containing numerous 0-byte files with diverse extensions, organized into a single subfolder. Useful for testing MIME type detection or file explorer functionalities.

create_zip_with_known_empty_filetypes_in_folder.sh

#!/bin/bash

# Script to create a test zip file with various 0-byte files,
# all placed within a single folder inside the zip.

# --- Configuration ---
ZIP_FILENAME="comprehensive_mime_test_folder.zip" # Changed filename slightly
TEMP_DIR_NAME="mime_test_files_temp"
INTERNAL_FOLDER_NAME="all_test_files" # The folder name inside the zip

# (Extension lists remain the same as before)
EXTENSIONS_TEXT=(
  txt log md json xml csv yml yaml ini cfg
  html htm css js ts jsx tsx php rb py sh
  java c cpp h hpp cs swift kt go rs
  sql graphql
)
EXTENSIONS_IMAGE=(
  png jpg jpeg gif webp svg bmp ico
  tif tiff heic heif avif
)
EXTENSIONS_DOCS=(
  pdf doc docx xls xlsx ppt pptx odt ods odp rtf
)
EXTENSIONS_AUDIO=(
  mp3 wav ogg aac flac m4a wma
)
EXTENSIONS_VIDEO=(
  mp4 webm mkv flv avi mov wmv
)
EXTENSIONS_ARCHIVES=(
  zip tar gz bz2 xz 7z rar
)
EXTENSIONS_FONTS=(
  ttf otf woff woff2 eot
)
EXTENSIONS_OTHER=(
  bin dat exe dll so appimage dmg pkg
  iso vhd vmdk
  "NO_EXTENSION_FILE"
  "File With Spaces"
  ".dotfile_example"
)
ALL_EXTENSIONS=(
  "${EXTENSIONS_TEXT[@]}"
  "${EXTENSIONS_IMAGE[@]}"
  "${EXTENSIONS_DOCS[@]}"
  "${EXTENSIONS_AUDIO[@]}"
  "${EXTENSIONS_VIDEO[@]}"
  "${EXTENSIONS_ARCHIVES[@]}"
  "${EXTENSIONS_FONTS[@]}"
  "${EXTENSIONS_OTHER[@]}"
)

# --- Script Logic ---

# 1. Create a temporary directory
echo "Creating temporary directory: $TEMP_DIR_NAME"
mkdir -p "$TEMP_DIR_NAME/$INTERNAL_FOLDER_NAME" # Create the internal folder as well
if [ $? -ne 0 ]; then
  echo "Error: Could not create temporary directory structure '$TEMP_DIR_NAME/$INTERNAL_FOLDER_NAME'." >&2
  exit 1
fi

# 2. Create 0-byte files *inside the internal folder*
echo "Creating 0-byte test files inside '$INTERNAL_FOLDER_NAME'..."
file_count=0
pushd "$TEMP_DIR_NAME/$INTERNAL_FOLDER_NAME" > /dev/null # Enter the internal folder

for ext_or_name in "${ALL_EXTENSIONS[@]}"; do
  if [[ "$ext_or_name" == *"."* ]] || [[ "$ext_or_name" == "NO_EXTENSION_FILE" ]] || [[ "$ext_or_name" == "File With Spaces" ]] || [[ "$ext_or_name" == ".dotfile_example" ]]; then
    filename_to_create="$ext_or_name"
  else
    filename_to_create="test_file.$ext_or_name"
  fi
  
  touch "$filename_to_create"
  if [ $? -eq 0 ]; then
    file_count=$((file_count + 1))
  else
    echo "  Warning: Could not create '$filename_to_create'" >&2
  fi
done
echo "Created $file_count test files."

popd > /dev/null # Return to $TEMP_DIR_NAME

# 3. Zip up the *internal folder* (from within $TEMP_DIR_NAME)
echo "Creating zip file: ../$ZIP_FILENAME containing folder '$INTERNAL_FOLDER_NAME'"
pushd "$TEMP_DIR_NAME" > /dev/null # Enter the parent of the internal folder
zip -q -r "../$ZIP_FILENAME" "$INTERNAL_FOLDER_NAME" # Zip the INTERNAL_FOLDER_NAME recursively and quietly
if [ $? -ne 0 ]; then
  echo "Error: Could not create zip file." >&2
  popd > /dev/null
  cd ..
  rm -rf "$TEMP_DIR_NAME"
  exit 1
fi
popd > /dev/null # Return to original directory

# 4. Clean up
echo "Cleaning up temporary directory..."
rm -rf "$TEMP_DIR_NAME"
if [ $? -ne 0 ]; then
  echo "Warning: Could not remove temporary directory '$TEMP_DIR_NAME'." >&2
fi

echo "--------------------------------------"
echo "Test zip file created: $ZIP_FILENAME"
echo "It contains the folder '$INTERNAL_FOLDER_NAME' with $file_count files."
echo "Upload this to your Zip File Explorer tool."
echo "--------------------------------------"

exit 0