Adding all files and folders

scripts/04_nixos_recon.sh

@@ -0,0 +1,110 @@
+#!/bin/bash
+#
+# Phase 2: Deep System Reconnaissance for NixOS Migration
+# This script gathers detailed information about installed software, services,
+# configurations, and development environments on the current Ubuntu system.
+# All output is logged to a file for later analysis.
+
+# --- Configuration ---
+LOG_FILE="logs/04_nixos_recon.log"
+USER_HOME=$(eval echo ~${SUDO_USER:-$USER})
+
+# --- Helper Functions ---
+log() {
+    echo -e "$1" | tee -a "$LOG_FILE"
+}
+
+log_header() {
+    log "\n"
+    log "========================================================================"
+    log "=== $1"
+    log "========================================================================"
+}
+
+run_and_log() {
+    log "--- Running command: $1 ---"
+    eval "$1" 2>>"$LOG_FILE" | tee -a "$LOG_FILE"
+    log "--- Command finished ---\n"
+}
+
+# --- Main Execution ---
+
+# Initialize log file
+echo "NixOS Migration - Deep Reconnaissance Log - $(date)" > "$LOG_FILE"
+echo "----------------------------------------------------" >> "$LOG_FILE"
+log "User Home Directory: $USER_HOME"
+
+# 1. Software Inventory (APT & Snap)
+log_header "SOFTWARE INVENTORY"
+if command -v dpkg &> /dev/null; then
+    run_and_log "dpkg --get-selections | grep -v deinstall"
+else
+    log "dpkg command not found. Skipping APT package scan."
+fi
+
+if command -v snap &> /dev/null; then
+    run_and_log "snap list"
+else
+    log "snap command not found. Skipping Snap package scan."
+fi
+
+# 2. Systemd Services & Timers
+log_header "SYSTEMD SERVICES & TIMERS"
+log "--- Active System Services ---"
+run_and_log "systemctl list-units --type=service --state=running"
+log "--- All System Timers ---"
+run_and_log "systemctl list-timers --all"
+
+log "\n--- Active User Services (if any) ---"
+# Check for user session bus to run user commands
+if [ -n "$XDG_RUNTIME_DIR" ]; then
+    run_and_log "systemctl --user list-units --type=service --state=running"
+    log "--- All User Timers (if any) ---"
+    run_and_log "systemctl --user list-timers --all"
+else
+    log "Could not connect to user session bus. Skipping user services/timers."
+fi
+
+# 3. Docker Environment
+log_header "DOCKER ENVIRONMENT"
+if command -v docker &> /dev/null; then
+    run_and_log "docker --version"
+    run_and_log "docker info"
+    run_and_log "docker ps -a --format 'table {{.Names}}\t{{.Image}}\t{{.Status}}\t{{.Ports}}'"
+    run_and_log "docker images --format 'table {{.Repository}}\t{{.Tag}}\t{{.Size}}'"
+    run_and_log "docker volume ls"
+    log "--- Searching for docker-compose files in home directory ---"
+    run_and_log "find \"$USER_HOME\" -name \"*docker-compose.yml\" -o -name \"*compose.yml\" 2>/dev/null"
+else
+    log "docker command not found. Skipping Docker scan."
+fi
+
+# 4. Command-Line Environment & Scripts
+log_header "COMMAND-LINE TOOLS & SCRIPTS"
+log "--- Top 50 Most Used Commands from History ---"
+# This gives an idea of frequently used, un-packaged CLI tools
+if [ -f "$USER_HOME/.bash_history" ]; then
+    run_and_log "cat $USER_HOME/.bash_history | sed 's/sudo //g' | awk '{print $1}' | sort | uniq -c | sort -rn | head -n 50"
+elif [ -f "$USER_HOME/.zsh_history" ]; then
+    run_and_log "cat $USER_HOME/.zsh_history | sed 's/sudo //g' | awk '{print $1}' | sort | uniq -c | sort -rn | head -n 50"
+else
+    log "Shell history file not found."
+fi
+
+log "--- User Cron Jobs (crontab) ---"
+run_and_log "crontab -l"
+
+log "--- Manually Installed Scripts & Binaries ---"
+log "Searching in /usr/local/bin, ~/bin, and ~/.local/bin..."
+run_and_log "ls -lA /usr/local/bin"
+if [ -d "$USER_HOME/bin" ]; then
+    run_and_log "ls -lA \"$USER_HOME/bin\""
+fi
+if [ -d "$USER_HOME/.local/bin" ]; then
+    run_and_log "ls -lA \"$USER_HOME/.local/bin\""
+fi
+
+log_header "RECONNAISSANCE COMPLETE"
+log "Log file saved to: $LOG_FILE"
+log "This file provides a detailed snapshot of the system's software and configuration."
+log "Review it carefully to plan your configuration.nix and home-manager setup."