composer

#!/bin/bash
# Composer wrapper - uses the php wrapper for version management
# Selects Composer LTS (2.2.x) for PHP < 7.2, latest otherwise

set -euo pipefail

COMPOSER_DIR="$HOME/.local/share/composer"
COMPOSER_LTS="$COMPOSER_DIR/composer-lts.phar"
COMPOSER_LATEST="$COMPOSER_DIR/composer-latest.phar"
SCRIPT_DIR="$(dirname "$(readlink -f "$0")")"

# Download composer phar
download_composer() {
    local target="$1"
    local version="$2"

    mkdir -p "$COMPOSER_DIR"

    if [[ "$version" == "lts" ]]; then
        curl -sL "https://getcomposer.org/download/latest-2.2.x/composer.phar" -o "$target"
    else
        curl -sL "https://getcomposer.org/download/latest-stable/composer.phar" -o "$target"
    fi
    chmod +x "$target"
}

# Main
main() {
    # Get PHP version from our php wrapper
    local php_version
    php_version=$("$SCRIPT_DIR/php" -r 'echo PHP_MAJOR_VERSION . "." . PHP_MINOR_VERSION;' 2>/dev/null)

    local composer_phar

    # Composer 2.3+ requires PHP 7.2.5+
    # Use LTS (2.2.x) for older PHP versions
    if [[ "${php_version%%.*}" -lt 7 ]] || [[ "$php_version" < "7.2" ]]; then
        [[ ! -f "$COMPOSER_LTS" ]] && download_composer "$COMPOSER_LTS" "lts"
        composer_phar="$COMPOSER_LTS"
    else
        [[ ! -f "$COMPOSER_LATEST" ]] && download_composer "$COMPOSER_LATEST" "latest"
        composer_phar="$COMPOSER_LATEST"
    fi

    exec "$SCRIPT_DIR/php" "$composer_phar" "$@"
}

main "$@"