fl_sc

#!/bin/bash


usage() {
    echo "Usage: $0 [options]"
    echo "Options:"
    echo "  --version <VERSION>  Specify the Flutter version to install."
    echo "  --channel <CHANNEL>  Specify the Flutter channel (default: stable)."
    echo "  --replace            Replace the existing Flutter installation."
    echo "  --help               Display this help message."
    exit 1
}

if [[ "$1" == "--help" ]]; then
    usage
fi


echo "Installing required dependencies..."
sudo apt-get update -y
sudo apt-get install -y curl git unzip xz-utils zip libglu1-mesa tar jq

check_command() {
    if ! command -v "$1" >/dev/null 2>&1; then
        echo "Error: '$1' is not installed and could not be installed automatically."
        exit 1
    fi
}

REQUIRED_COMMANDS=("curl" "tar" "jq")
for cmd in "${REQUIRED_COMMANDS[@]}"; do
    check_command "$cmd"
done

VERSION=""
REPLACE=0
CHANNEL="stable"

while [[ $# -gt 0 ]]; do
    key="$1"
    case $key in
        --version)
            VERSION="$2"
            shift 2
            ;;
        --replace)
            REPLACE=1
            shift
            ;;
        --channel)
            CHANNEL="$2"
            shift 2
            ;;
        *)
            echo "Error: Unknown option '$1'."
            exit 1
            ;;
    esac
done

SDK_DIR="$HOME/tools/sdk"
if [ ! -d "$SDK_DIR" ]; then
    mkdir -p "$SDK_DIR"
fi

FLUTTER_DIR="$SDK_DIR/flutter"
if [ -d "$FLUTTER_DIR" ]; then
    if [ "$REPLACE" -eq 1 ]; then
        echo "Removing the existing Flutter installation..."
        sudo rm -rf "$FLUTTER_DIR"
    else
        if [ -n "$VERSION" ]; then
            echo "Error: Flutter is already installed in '$FLUTTER_DIR'. Use --replace to overwrite."
            exit 1
        else
            read -p "Flutter is already installed. Do you want to replace it? (y/n): " replace_response
            if [[ "$replace_response" != "y" && "$replace_response" != "Y" ]]; then
                exit 0
            else
                echo "Removing the existing Flutter installation..."
                sudo rm -rf "$FLUTTER_DIR"
            fi
        fi
    fi
fi

ARCHITECTURE=$(uname -m)
if [ "$ARCHITECTURE" == "x86_64" ]; then
    FLUTTER_ARCH="x64"
elif [ "$ARCHITECTURE" == "aarch64" ]; then
    FLUTTER_ARCH="arm64"
else
    echo "Error: Unsupported architecture '$(uname -m)'. Flutter supports x64 and arm64."
    exit 1
fi

echo "Fetching Flutter releases list..."
FLUTTER_LINUX_DATA=$(curl -s https://storage.googleapis.com/flutter_infra_release/releases/releases_linux.json)

if [ -n "$VERSION" ]; then
    FLUTTER_PATH=$(echo "$FLUTTER_LINUX_DATA" | jq -r --arg ARCH "$FLUTTER_ARCH" --arg VERSION "$VERSION" --arg CHANNEL "$CHANNEL" '.releases[] | select(.dart_sdk_arch == $ARCH and .version == $VERSION and .channel == $CHANNEL) | .archive')
    if [ -z "$FLUTTER_PATH" ]; then
        echo "Error: Version '$VERSION' not found for channel '$CHANNEL' and architecture '$FLUTTER_ARCH'."
        exit 1
    fi
    FLUTTER_VERSION="$VERSION"
else
    FLUTTER_PATH=$(echo "$FLUTTER_LINUX_DATA" | jq -r --arg ARCH "$FLUTTER_ARCH" --arg CHANNEL "$CHANNEL" '.releases | map(select(.dart_sdk_arch == $ARCH and .channel == $CHANNEL)) | map(select(.version)) | .[0].archive')
    if [ -z "$FLUTTER_PATH" ] || [ "$FLUTTER_PATH" == "null" ]; then
        echo "Error: Could not find a Flutter release for channel '$CHANNEL' and architecture '$FLUTTER_ARCH'."
        exit 1
    fi
    FLUTTER_VERSION=$(echo "$FLUTTER_PATH" | sed -E 's|.*/flutter_linux_([^-]+).*|\1|')
fi

FLUTTER_DOWNLOAD_URL="https://storage.googleapis.com/flutter_infra_release/releases/$FLUTTER_PATH"
FLUTTER_ARCHIVE="$SDK_DIR/flutter.tar.xz"

echo "Downloading Flutter $FLUTTER_VERSION ($CHANNEL / $FLUTTER_ARCH)..."
echo "URL: $FLUTTER_DOWNLOAD_URL"
curl -L "$FLUTTER_DOWNLOAD_URL" -o "$FLUTTER_ARCHIVE"

echo "Extracting Flutter..."
tar -xf "$FLUTTER_ARCHIVE" -C "$SDK_DIR"

echo "Cleaning up..."
rm "$FLUTTER_ARCHIVE"

echo ""
echo "Flutter $FLUTTER_VERSION installed successfully to '$FLUTTER_DIR'."
echo "To use Flutter, add the following line to your shell profile (e.g., .bashrc or .zshrc):"
echo ""
echo "  export PATH=\"\$PATH:$SDK_DIR/flutter/bin\""
echo ""
echo "Then restart your terminal or run: source ~/.bashrc"