flutterw

#!/usr/bin/env sh

WRAPPER_PROPERTIES_FILE="flutter_wrapper.properties"
WRAPPER_SDK_DIRECTORY="${HOME}/.flutter_wrapper"

CURRENT_VERSION=""
CURRENT_CHANNEL=""
CURRENT_URL=""

PARAM=""

# collection current installed flutter version info
collection_sdk_info(){
    echo $1
    version="$(cut -d'•' -f1 <<< $1)"
    CURRENT_VERSION="$(cut -d' ' -f2 <<< ${version})"
    channel="$(cut -d'•' -f2 <<< $1)"
    CURRENT_CHANNEL="$(cut -d' ' -f2 <<< ${channel})"
    git_url="$(cut -d'•' -f3 <<< $1)"
    CURRENT_URL="$(cut -d' ' -f1 <<< ${git_url})"
}

# init() will create flutter_wrapper.property file
# This file will according system flutter sdk version collection 
# flutter version and channel and download url info
init(){
    #check flutter is installed
    system_sdk_info="$(flutter --version)"
    if [ ! $? -eq 0 ]; then
        echo "Error: flutter is not installed."
        exit 1
    fi

    collection_sdk_info "${system_sdk_info}"

    # remove old flutter_wrapper.property file 
    rm -rf ${WRAPPER_PROPERTIES_FILE}

    # add to file
    echo "VERSION=${CURRENT_VERSION}" >> ${WRAPPER_PROPERTIES_FILE}
    echo "CHANNEL=${CURRENT_CHANNEL}" >> ${WRAPPER_PROPERTIES_FILE}
    echo "REPO_URL=${CURRENT_URL}" >> ${WRAPPER_PROPERTIES_FILE}
}

# list() list all downloaded flutter version in ~/.flutter
list(){
    ls -1 ~/.flutter_wrapper
}

download_sdk(){
    required_flutter="${WRAPPER_SDK_DIRECTORY}/${VERSION}/bin/flutter"
    if [ ! -e ${required_flutter} ]
    then
        echo "v${VERSION}"
        {
            git clone -b "v${VERSION}" https://github.com/flutter/flutter.git "${WRAPPER_SDK_DIRECTORY}/${VERSION}/" --depth 1
        } || {
            git clone -b "${VERSION}" https://github.com/flutter/flutter.git "${WRAPPER_SDK_DIRECTORY}/${VERSION}/" --depth 1
        }
    fi
}


# read flutter_wrapper.properties file
check_file_config(){
    if [ -f "./$WRAPPER_PROPERTIES_FILE" ]
    then
        while IFS='=' read -r key value
        do
            key=$(echo $key | tr '.' '_')
            eval ${key}=\${value}
        done < "$WRAPPER_PROPERTIES_FILE"
        if [[ -z $VERSION || -z $CHANNEL || -z $REPO_URL ]]; then
            echo "./$WRAPPER_PROPERTIES_FILE is incorrect,please check it or run 'flutterw init'."
            exit 1
        fi
    else
        echo "$WRAPPER_PROPERTIES_FILE not found. please run 'flutterw init' to init project"
    fi
}

if [ "$1" == "init" ]; then
    init
    printf "Init successful"
elif [ "$1" == "list" ]; then
    printf "Flutter in [${HOME}/.flutter] directory \n"
    list
else
     # check properites file exists
    check_file_config
    download_sdk
    # run command
    # set -e
    "${WRAPPER_SDK_DIRECTORY}/${VERSION}/bin/flutter" "$@"
fi