usm/installer/pm_apt.sh

#!/bin/bash
# pm_apt.sh - APT package manager implementation for Debian/Ubuntu systems

# Package name mappings for apt
declare -A APT_PACKAGE_NAMES=(
    ["vala"]="valac"
    ["meson"]="meson"
    ["ninja"]="ninja-build"
    ["git"]="git"
    ["pkgconfig"]="pkg-config"
    ["gcc"]="gcc"
    ["glib"]="libglib2.0-dev"
    ["libsodium"]="libsodium-dev"
    ["gtk"]="libgtk-3-dev"
)

# Check if a package is installed via apt/dpkg
pm_is_installed() {
    local pkg="$1"
    dpkg -l "$pkg" 2>/dev/null | grep -q "^ii"
}

# Get the apt package name for a generic dependency
pm_get_package_name() {
    local dep="$1"
    if [[ -n "${APT_PACKAGE_NAMES[$dep]}" ]]; then
        echo "${APT_PACKAGE_NAMES[$dep]}"
    else
        echo "$dep"
    fi
}

# Update apt cache
pm_update() {
    local sudo=$(get_sudo)
    if [[ -n "$sudo" ]]; then
        $sudo apt-get update -qq
    else
        apt-get update -qq
    fi
}

# Install packages via apt
pm_install() {
    local -a pkgs=("$@")
    local sudo=$(get_sudo)
    local apt_opts="-y -qq"
    
    if [[ "$ASSUME_YES" == "true" ]]; then
        apt_opts="-y -qq --allow-downgrades --allow-remove-essential --allow-change-held-packages"
    fi
    
    log_step "Installing packages via apt: ${pkgs[*]}"
    
    if [[ -n "$sudo" ]]; then
        DEBIAN_FRONTEND=noninteractive $sudo apt-get install $apt_opts "${pkgs[@]}"
    else
        DEBIAN_FRONTEND=noninteractive apt-get install $apt_opts "${pkgs[@]}"
    fi
}

# Get list of missing dependencies (apt-specific override)
get_missing_deps() {
    local -a missing=()
    local deps=("vala" "meson" "ninja" "git" "pkgconfig" "gcc" "glib" "libsodium")
    
    for dep in "${deps[@]}"; do
        local pkg_name=$(pm_get_package_name "$dep")
        if ! pm_is_installed "$pkg_name"; then
            missing+=("$pkg_name")
        fi
    done
    
    echo "${missing[@]}"
}