install.sh

#!/bin/bash

# This script automates the installation of the lamver tool.
# It checks for the specified version (or fetches the latest one),
# downloads the binary, and installs it on the system.

# Check for required tools: curl and tar.
# These tools are necessary for downloading and extracting the lamver binary.
if ! command -v curl &>/dev/null; then
    echo "curl could not be found"
    exit 1
fi

if ! command -v tar &>/dev/null; then
    echo "tar could not be found"
    exit 1
fi

# Determine the version of lamver to install.
# If no version is specified as a command line argument, fetch the latest version.
if [ -z "$1" ]; then
    VERSION=$(curl -s https://api.github.com/repos/go-to-k/lamver/releases/latest | grep '"tag_name":' | sed -E 's/.*"v([^"]+)".*/\1/')
    if [ -z "$VERSION" ]; then
        echo "Failed to fetch the latest version"
        exit 1
    fi
else
    VERSION=$1
fi

# Normalize the version string by removing any leading 'v'.
VERSION=${VERSION#v}

# Detect the architecture of the current system.
# This script supports x86_64, arm64, and i386 architectures.
ARCH=$(uname -m)
case $ARCH in
x86_64 | amd64) ARCH="x86_64" ;;
arm64 | aarch64) ARCH="arm64" ;;
i386 | i686) ARCH="i386" ;;
*)
    echo "Unsupported architecture: $ARCH"
    exit 1
    ;;
esac

# Detect the operating system (OS) of the current system.
# This script supports Linux, Darwin (macOS) and Windows operating systems.
OS=$(uname -s)
case $OS in
Linux) OS="Linux" ;;
Darwin) OS="Darwin" ;;
MINGW* | MSYS* | CYGWIN*) OS="Windows" ;;
*)
    echo "Unsupported OS: $OS"
    exit 1
    ;;
esac

# Construct the download URL for the lamver binary based on the version, OS, and architecture.
FILE_NAME="lamver_${VERSION}_${OS}_${ARCH}.tar.gz"
URL="https://github.com/go-to-k/lamver/releases/download/v${VERSION}/${FILE_NAME}"

# Download the lamver binary.
echo "Downloading lamver..."
if ! curl -L -o "$FILE_NAME" "$URL"; then
    echo "Failed to download lamver"
    exit 1
fi

# Install lamver.
# This involves extracting the binary and moving it to /usr/local/bin.
echo "Installing lamver..."
if ! tar -xzf "$FILE_NAME"; then
    echo "Failed to extract lamver"
    exit 1
fi
if ! sudo mv lamver /usr/local/bin/lamver; then
    echo "Failed to install lamver"
    exit 1
fi

# Clean up by removing the downloaded tar file.
rm "$FILE_NAME"

echo "lamver installation complete."
echo "Run 'lamver -h' to see how to use lamver."