install.sh

#!/usr/bin/env bash

# git-absorb DevContainer Feature
# Copyright (c) 2025 helpers4
# Licensed under LGPL-3.0 - see LICENSE file for details
#
# Installs git-absorb: automatically absorb staged changes into their logical commits

set -e

# Feature options
GIT_ABSORB_VERSION="${VERSION:-"latest"}"
USERNAME="${USERNAME:-"${_REMOTE_USER:-"automatic"}"}"

if [ "$(id -u)" -ne 0 ]; then
    echo -e 'Script must be run as root. Use sudo, su, or add "USER root" to your Dockerfile before running this script.'
    exit 1
fi

# Determine the appropriate non-root user
if [ "${USERNAME}" = "auto" ] || [ "${USERNAME}" = "automatic" ]; then
    USERNAME=""
    POSSIBLE_USERS=("vscode" "node" "codespace" "$(awk -v val=1000 -F ":" '$3==val{print $1}' /etc/passwd)")
    for CURRENT_USER in "${POSSIBLE_USERS[@]}"; do
        if id -u ${CURRENT_USER} > /dev/null 2>&1; then
            USERNAME=${CURRENT_USER}
            break
        fi
    done
    if [ "${USERNAME}" = "" ]; then
        USERNAME=root
    fi
elif [ "${USERNAME}" = "none" ] || ! id -u ${USERNAME} > /dev/null 2>&1; then
    USERNAME=root
fi

# Clean up function
cleanup() {
    rm -rf /var/lib/apt/lists/*
    rm -f /tmp/git-absorb.tar.gz
}

trap cleanup EXIT

# Ensure apt is in non-interactive mode
export DEBIAN_FRONTEND=noninteractive

echo "🔧 Installing git-absorb feature..."
echo "Username: $USERNAME"
echo "git-absorb version: $GIT_ABSORB_VERSION"

# Update apt if needed
apt_get_update() {
    if [ "$(find /var/lib/apt/lists/* | wc -l)" = "0" ]; then
        echo "Running apt-get update..."
        apt-get update -y
    fi
}

# Check and install packages
check_packages() {
    if ! dpkg -s "$@" > /dev/null 2>&1; then
        apt_get_update
        apt-get -y install --no-install-recommends "$@"
    fi
}

# Install dependencies
echo "🔧 Installing dependencies..."
check_packages curl ca-certificates tar

# Ensure git is installed
if ! command -v git > /dev/null 2>&1; then
    check_packages git
fi

# Detect architecture
architecture="$(uname -m)"
case $architecture in
    x86_64) architecture="x86_64-unknown-linux-musl";;
    aarch64 | armv8*) architecture="aarch64-unknown-linux-musl";;
    *) echo "(!) Architecture $architecture unsupported"; exit 1 ;;
esac

# Install git-absorb
echo "🎯 Installing git-absorb..."

if [ "${GIT_ABSORB_VERSION}" = "latest" ]; then
    echo "  📦 Fetching latest version..."
    GIT_ABSORB_VERSION=$(curl -s "https://api.github.com/repos/tummychow/git-absorb/releases/latest" | grep -o '"tag_name": "[^"]*"' | cut -d'"' -f4)
    if [ -z "${GIT_ABSORB_VERSION}" ]; then
        echo "(!) Failed to fetch latest version"
        exit 1
    fi
fi

# Extract version number for file names (remove 'v' prefix if present)
if [ "${GIT_ABSORB_VERSION::1}" = 'v' ]; then
    VERSION_NUMBER="${GIT_ABSORB_VERSION:1}"
else
    VERSION_NUMBER="${GIT_ABSORB_VERSION}"
fi

echo "  📦 Downloading git-absorb ${GIT_ABSORB_VERSION}..."

# Download from GitHub releases (use original tag name for URL path)
DOWNLOAD_URL="https://github.com/tummychow/git-absorb/releases/download/${GIT_ABSORB_VERSION}/git-absorb-${VERSION_NUMBER}-${architecture}.tar.gz"

if ! curl -fL "${DOWNLOAD_URL}" -o /tmp/git-absorb.tar.gz; then
    echo "(!) Failed to download git-absorb from ${DOWNLOAD_URL}"
    echo "(!) Available releases: https://github.com/tummychow/git-absorb/releases"
    exit 1
fi

# Extract and install
echo "  📦 Installing git-absorb..."
cd /tmp
tar -xzf git-absorb.tar.gz

# Find the binary (might be in a subdirectory)
BINARY_PATH=$(find /tmp -name "git-absorb" -type f -executable 2>/dev/null | head -1)

if [ -z "${BINARY_PATH}" ]; then
    echo "(!) Could not find git-absorb binary in downloaded archive"
    ls -la /tmp/
    exit 1
fi

# Install to /usr/local/bin
cp "${BINARY_PATH}" /usr/local/bin/git-absorb
chmod +x /usr/local/bin/git-absorb

# Verify installation
if ! /usr/local/bin/git-absorb --version > /dev/null 2>&1; then
    echo "(!) git-absorb installation verification failed"
    exit 1
fi

# Get installed version for confirmation
INSTALLED_VERSION="$(/usr/local/bin/git-absorb --version 2>&1 | grep -o '[0-9.]*' | head -1 || echo 'unknown')"
echo "  ✅ git-absorb ${INSTALLED_VERSION} installed successfully"

echo
echo "🎉 git-absorb installation complete!"
echo
echo "📋 Usage:"
echo "  git add <files>          # Stage your changes"
echo "  git absorb               # Automatically absorb into logical commits"
echo "  git absorb --dry-run     # Preview what would be absorbed"
echo
echo "🚀 Ready to use:"
echo "  git absorb --help"
echo