Phase 1.1: Create lib/ directory structure for archangel refactor

- Add custom/lib/common.sh: output, validation, fzf prompts, disk utils
- Add custom/lib/config.sh: argument parsing, config loading, validation
- Add custom/lib/disk.sh: partitioning, EFI management, disk selection
- Add custom/lib/zfs.sh: pool, datasets, ZFSBootMenu, services, hooks
- Update install-archzfs to source libs
- Remove duplicated output/config functions from main script

Prepares codebase for btrfs filesystem support (Phase 2).

1 files changed, 127 insertions, 0 deletions

diff --git a/custom/lib/config.sh b/custom/lib/config.sh
new file mode 100644
index 0000000..82f5d77
--- /dev/null
+++ b/custom/lib/config.sh
@@ -0,0 +1,127 @@
+#!/usr/bin/env bash
+# config.sh - Configuration and argument handling for archangel installer
+# Source this file after common.sh
+
+#############################
+# Global Config Variables
+#############################
+
+CONFIG_FILE=""
+UNATTENDED=false
+
+# These get populated by config file or interactive prompts
+HOSTNAME=""
+TIMEZONE=""
+LOCALE=""
+KEYMAP=""
+SELECTED_DISKS=()
+RAID_LEVEL=""
+WIFI_SSID=""
+WIFI_PASSWORD=""
+ENCRYPTION_ENABLED=false
+ZFS_PASSPHRASE=""
+ROOT_PASSWORD=""
+SSH_ENABLED=false
+SSH_KEY=""
+
+#############################
+# Argument Parsing
+#############################
+
+parse_args() {
+    while [[ $# -gt 0 ]]; do
+        case "$1" in
+            --config-file)
+                if [[ -n "$2" && ! "$2" =~ ^- ]]; then
+                    CONFIG_FILE="$2"
+                    shift 2
+                else
+                    error "--config-file requires a path argument"
+                fi
+                ;;
+            --help|-h)
+                show_usage
+                exit 0
+                ;;
+            *)
+                error "Unknown option: $1 (use --help for usage)"
+                ;;
+        esac
+    done
+}
+
+show_usage() {
+    cat <<EOF
+Usage: archangel [OPTIONS]
+
+Arch Linux installer with ZFS/Btrfs support and snapshot management.
+
+Options:
+  --config-file PATH  Use config file for unattended installation
+  --help, -h          Show this help message
+
+Without --config-file, runs in interactive mode.
+See /root/archangel.conf.example for a config template.
+EOF
+}
+
+#############################
+# Config File Loading
+#############################
+
+load_config() {
+    local config_path="$1"
+
+    if [[ ! -f "$config_path" ]]; then
+        error "Config file not found: $config_path"
+    fi
+
+    info "Loading config from: $config_path"
+
+    # Source the config file (it's just key=value pairs)
+    # shellcheck disable=SC1090
+    source "$config_path"
+
+    # Convert DISKS from comma-separated string to array
+    if [[ -n "$DISKS" ]]; then
+        IFS=',' read -ra SELECTED_DISKS <<< "$DISKS"
+    fi
+
+    UNATTENDED=true
+    info "Running in unattended mode"
+}
+
+check_config() {
+    # Only use config when explicitly specified with --config-file
+    # This prevents accidental disk destruction from an unnoticed config file
+    if [[ -n "$CONFIG_FILE" ]]; then
+        load_config "$CONFIG_FILE"
+    fi
+}
+
+#############################
+# Config Validation
+#############################
+
+validate_config() {
+    local errors=0
+
+    [[ -z "$HOSTNAME" ]] && { warn "HOSTNAME not set"; ((errors++)); }
+    [[ -z "$TIMEZONE" ]] && { warn "TIMEZONE not set"; ((errors++)); }
+    [[ ${#SELECTED_DISKS[@]} -eq 0 ]] && { warn "No disks selected"; ((errors++)); }
+    [[ -z "$ROOT_PASSWORD" ]] && { warn "ROOT_PASSWORD not set"; ((errors++)); }
+
+    # Validate disks exist
+    for disk in "${SELECTED_DISKS[@]}"; do
+        [[ -b "$disk" ]] || { warn "Disk not found: $disk"; ((errors++)); }
+    done
+
+    # Validate timezone
+    if [[ -n "$TIMEZONE" && ! -f "/usr/share/zoneinfo/$TIMEZONE" ]]; then
+        warn "Invalid timezone: $TIMEZONE"
+        ((errors++))
+    fi
+
+    [[ $errors -gt 0 ]] && error "Config validation failed with $errors error(s)"
+    info "Config validation passed"
+}