cdnjs downloader

cdnjs.sh

#!/usr/bin/env bash

command_exists() {
  command -v "$@" >/dev/null 2>&1
}

TARGET_PATH="$PWD"
OWNER=$(id -u)
REQUIRED_PACKAGES="curl jq"

for package in $REQUIRED_PACKAGES; do
  if ! command_exists "$package"; then
    MISSING_PACKAGES=1
    echo -e "Executable $package not found!"
  fi
done

if [ -n "$MISSING_PACKAGES" ]; then
    exit 1
fi;

if [ -n "$1" ]; then
    TARGET_PATH="$1"
fi

TARGET_PATH="$TARGET_PATH/$3/$4"

if [ -n "$2" ]; then
    OWNER="$2"
fi

if [ -z "$3" ]; then
    echo "Package name not provided"
    exit 1
fi

if [ -z "$4" ]; then
    echo "Version number for $3 not provided"
    exit 1
fi

if [ ! -d "$TARGET_PATH" ]; then
    mkdir -p "$TARGET_PATH"
fi

API_URL=$(printf 'https://api.cdnjs.com/libraries/%s/%s?fields=files' "$3" "$4")
FILE_BASE_URL=$(printf 'https://cdnjs.cloudflare.com/ajax/libs/%s/%s' "$3" "$4")

for file in $(curl -sS "$API_URL" | jq -r '.files | .[]'); do
    echo -e "Downloading $file..."
    
    curl -sS "$FILE_BASE_URL/$file" --create-dirs -o "$TARGET_PATH/$file"
done

chown -R "$OWNER:" "$TARGET_PATH/../"

exit 0