fix(common): validate log level after error function (#133)

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Signed-off-by: Ismo Vuorinen <ismo@ivuorinen.net>

.editorconfig

@@ -28,7 +28,7 @@ indent_size = 1
 indent_size = 1
 indent_style = tab
 
-[{local/bin/*,**/*.sh,**/zshrc,config/*,scripts/*}]
+[{local/bin/*,local/dfm/*,**/*.sh,**/zshrc,config/*,scripts/*}]
 indent_size        = 2
 tab_width          = 2
 shell_variant      = bash # --language-variant

.github/README.md

@@ -16,9 +16,11 @@ see what interesting stuff you've done with it. Sharing is caring.
 ### First time setup
 
 1. Clone this repository to `$HOME/.dotfiles`
-2. `./install`
+2. Install [shellcheck](https://github.com/koalaman/shellcheck) and [pre-commit](https://pre-commit.com/)
-3. ???
+3. Run `pre-commit install` to enable Git hooks
-4. Profit
+4. `./install`
+5. ???
+6. Profit
 
 ### Updates
 

local/dfm/cmd/install.sh

@@ -0,0 +1,239 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Source core dfm libraries
+source "$(dirname "${BASH_SOURCE[0]}")/../lib/common.sh"
+source "$(dirname "${BASH_SOURCE[0]}")/../lib/utils.sh"
+
+# Default paths can be overridden via environment variables
+: "${DOTFILES:=$HOME/.dotfiles}"
+: "${BREWFILE:=$DOTFILES/config/homebrew/Brewfile}"
+: "${TEMP_DIR:=$(mktemp -d)}"
+: "${DFM_MAX_RETRIES:=3}"
+
+# Remove temp folder on exit
+trap 'rm -rf "$TEMP_DIR"' EXIT
+
+# Installation functions for dfm, the dotfile manager
+#
+# @author Ismo Vuorinen <https://github.com/ivuorinen>
+# @license MIT
+
+# Installs all required packages in the correct order.
+#
+# Description:
+#   Orchestrates the installation process for the dotfile manager by sequentially invoking
+#   the installation routines for fonts, Homebrew, and Rust (cargo). It logs the start of the
+#   overall installation process before calling each respective function.
+#
+# Globals:
+#   lib::log - Function used to log installation progress messages.
+#
+# Arguments:
+#   None.
+#
+# Outputs:
+#   Logs an informational message indicating the start of the installation process.
+#
+# Returns:
+#   None.
+#
+# Example:
+#   all
+#
+# @description
+#   Parse command line options controlling installation steps.
+parse_options()
+{
+  NO_AUTOMATION=0
+  SKIP_FONTS=0
+  SKIP_BREW=0
+  SKIP_CARGO=0
+
+  while [[ $# -gt 0 ]]; do
+    case "$1" in
+      --no-automation)
+        NO_AUTOMATION=1
+        ;;
+      --no-fonts)
+        SKIP_FONTS=1
+        ;;
+      --no-brew)
+        SKIP_BREW=1
+        ;;
+      --no-cargo)
+        SKIP_CARGO=1
+        ;;
+      *)
+        lib::error "Unknown option: $1"
+        return 1
+        ;;
+    esac
+    shift
+  done
+}
+
+# @description
+#   Install all configured components by calling each individual
+#   installation routine unless skipped via options.
+install_all()
+{
+  parse_options "$@"
+
+  lib::log "Installing all packages..."
+
+  if [[ $SKIP_FONTS -eq 0 ]]; then
+    install_fonts
+  fi
+
+  if [[ $SKIP_BREW -eq 0 ]]; then
+    install_brew
+  fi
+
+  if [[ $SKIP_CARGO -eq 0 ]]; then
+    install_cargo
+  fi
+}
+
+# Installs fonts required by the dotfile manager.
+#
+# Globals:
+#   None.
+#
+# Arguments:
+#   None.
+#
+# Outputs:
+#   Logs a message to STDOUT indicating that the font installation process has started.
+#
+# Returns:
+#   None.
+#
+# Example:
+#   install_fonts
+#
+# @description Install all configured fonts from helper script, prompting the user unless automation is disabled.
+install_fonts()
+{
+
+  : "${SKIP_FONTS:=0}"
+  : "${NO_AUTOMATION:=0}"
+
+  if [[ $SKIP_FONTS -eq 1 ]]; then
+    lib::log "Skipping fonts installation"
+    return 0
+  fi
+
+  if [[ $NO_AUTOMATION -eq 0 ]]; then
+    utils::interactive::confirm "Install fonts?" || return 0
+  fi
+
+  lib::log "Installing fonts..."
+  local script="${DOTFILES}/scripts/install-fonts.sh"
+
+  if [[ ! -x "$script" ]]; then
+    lib::error "Font installation script not found: $script"
+    return 1
+  fi
+
+  bash "$script"
+}
+
+# Install Homebrew and set it up.
+#
+# Installs the Homebrew package manager on macOS.
+#
+# Globals:
+#   lib::log - Logging utility used to report installation progress.
+#
+# Outputs:
+#   Logs a message indicating the start of the Homebrew installation process.
+#
+# Example:
+#   install_brew
+#
+# @description Install Homebrew and declared packages using the Brewfile.
+install_brew()
+{
+
+  : "${SKIP_BREW:=0}"
+  : "${NO_AUTOMATION:=0}"
+
+
+  if [[ $SKIP_BREW -eq 1 ]]; then
+    lib::log "Skipping Homebrew installation"
+    return 0
+  fi
+
+  if [[ $NO_AUTOMATION -eq 0 ]]; then
+    utils::interactive::confirm "Install Homebrew packages?" || return 0
+  fi
+
+  lib::log "Installing Homebrew..."
+  if ! utils::is_installed brew; then
+    lib::log "Homebrew not found, installing..."
+
+    local installer="$TEMP_DIR/homebrew-install.sh"
+    utils::retry "$DFM_MAX_RETRIES" \
+      curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh \
+      -o "$installer"
+
+    NONINTERACTIVE=1 bash "$installer"
+  fi
+
+  if utils::is_installed brew; then
+    brew bundle install --file="$BREWFILE" --force --quiet
+  else
+    lib::error "Homebrew installation failed"
+    return 1
+  fi
+}
+
+# Installs Rust and cargo packages.
+#
+# Description:
+#   Logs the start of the installation process for Rust and cargo packages.
+#   The installation logic is intended to be implemented where indicated.
+#
+# Globals:
+#   Uses lib::log for logging the installation process.
+#
+# Example:
+#   install_cargo
+#
+# @description Install Rust tooling and cargo packages using helper scripts.
+install_cargo()
+{
+
+  : "${SKIP_CARGO:=0}"
+  : "${NO_AUTOMATION:=0}"
+
+
+  if [[ $SKIP_CARGO -eq 1 ]]; then
+    lib::log "Skipping Rust and cargo installation"
+    return 0
+  fi
+
+  if [[ $NO_AUTOMATION -eq 0 ]]; then
+    utils::interactive::confirm "Install Rust and cargo packages?" || return 0
+  fi
+
+  lib::log "Installing Rust and cargo packages..."
+  if ! utils::is_installed cargo; then
+    lib::log "Rust not found, installing rustup..."
+
+    local installer="$TEMP_DIR/rustup-init.sh"
+    utils::retry "$DFM_MAX_RETRIES" \
+      curl https://sh.rustup.rs -sSf -o "$installer"
+    sh "$installer" -y
+    source "$HOME/.cargo/env"
+  fi
+
+  local script="${DOTFILES}/scripts/install-cargo-packages.sh"
+  if [[ -x "$script" ]]; then
+    bash "$script"
+  else
+    lib::error "Cargo packages script not found: $script"
+    return 1
+  fi
+}

local/dfm/dfm

@@ -0,0 +1,104 @@
+#!/usr/bin/env bash
+# dfm - dotfiles manager
+
+set -euo pipefail
+
+# allow overriding core directories
+DFM_SCRIPT_DIR="${DFM_SCRIPT_DIR:-$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)}"
+readonly DFM_SCRIPT_DIR
+export DFM_SCRIPT_DIR
+DFM_CMD_DIR="${DFM_CMD_DIR:-${DFM_SCRIPT_DIR}/cmd}"
+readonly DFM_CMD_DIR
+export DFM_CMD_DIR
+DFM_LIB_DIR="${DFM_LIB_DIR:-${DFM_SCRIPT_DIR}/lib}"
+readonly DFM_LIB_DIR
+export DFM_LIB_DIR
+DFM_DEFAULT_CONFIG_PATH="${DFM_DEFAULT_CONFIG_PATH:-$HOME/.config}"
+readonly DFM_DEFAULT_CONFIG_PATH
+export DFM_DEFAULT_CONFIG_PATH
+DFM_MAX_RETRIES="${DFM_MAX_RETRIES:-3}"
+readonly DFM_MAX_RETRIES
+export DFM_MAX_RETRIES
+export DFM_DEFAULT_INSTALL_DIR="${DFM_DEFAULT_INSTALL_DIR:-$HOME/.local}"
+export DFM_DEFAULT_VERBOSE="${DFM_DEFAULT_VERBOSE:-0}"
+TEMP_DIR="${TEMP_DIR:-$(mktemp -d)}"
+export TEMP_DIR
+
+# Load the common and utility functions from the lib directory.
+[[ -f "${DFM_LIB_DIR}/common.sh" ]] || {
+  echo "Error: Required file ${DFM_LIB_DIR}/common.sh not found"
+  exit 1
+}
+[[ -f "${DFM_LIB_DIR}/utils.sh" ]] || {
+  echo "Error: Required file ${DFM_LIB_DIR}/utils.sh not found"
+  exit 1
+}
+source "${DFM_LIB_DIR}/common.sh"
+source "${DFM_LIB_DIR}/utils.sh"
+
+# Display help information
+#
+# @return None
+main::show_help()
+{
+  cat << EOF
+Usage: dfm [command] [function] [arguments]
+
+dotfiles manager utility for installing and configuring dotfiles.
+
+If no arguments are provided, lists all available commands.
+If only a command is provided, lists available functions for that command.
+If a command and function are provided, executes the specified function.
+
+Examples:
+  dfm                    # List all available commands
+  dfm install            # List available functions for the install command
+  dfm install all        # Execute the 'all' function from the install command
+
+EOF
+}
+
+# Main function for the dfm script.
+#
+# The function checks if any arguments were provided. If no arguments are
+# provided, it lists all available commands. If a command name is provided,
+# it lists the available functions for that command. If a command and function
+# name are provided, it executes the function with the provided arguments.
+#
+# @param args The command-line arguments.
+# @return None
+main()
+{
+  if [[ $# -eq 0 ]]; then
+    main::list_available_commands
+    return 0
+  fi
+
+  local cmd="$1"
+  shift
+
+  if [[ "$cmd" == "-h" || "$cmd" == "--help" ]]; then
+    main::show_help
+    return 0
+  fi
+
+  if [[ $# -eq 0 ]]; then
+    # Show the available functions for the command
+    local cmd_file="${DFM_CMD_DIR}/${cmd}.sh"
+    if [[ -f "$cmd_file" ]]; then
+      list::print_group "Available functions for '$cmd'"
+      list::loop_functions "$cmd_file"
+    else
+      lib::error "Command '$cmd' not found"
+      return 1
+    fi
+    return 0
+  fi
+
+  local func="$1"
+  shift
+
+  main::execute_command "$cmd" "$func" "$@"
+}
+
+main "$@"

local/dfm/lib/common.sh

@@ -0,0 +1,368 @@
+#!/usr/bin/env bash
+# dfm common functions for logging and error handling, etc.
+# Source this file to use the functions in your scripts.
+#
+# @author Ismo Vuorinen <https://github.com/ivuorinen>
+# @license MIT
+set -euo pipefail
+
+declare -A ERROR_CODES=(
+  [SUCCESS]=0
+  [INVALID_ARGUMENT]=1
+  [COMMAND_NOT_FOUND]=2
+  [FUNCTION_NOT_FOUND]=3
+  [EXECUTION_FAILED]=4
+  [FILE_NOT_FOUND]=5
+)
+
+declare -A LOG_LEVELS=(
+  [DEBUG]=0
+  [INFO]=1
+  [WARN]=2
+  [ERROR]=3
+)
+
+# Simple logging function
+#
+# @example
+# lib::log "Hello, world!"
+#
+# @description Log a message to the console
+# @param $* Message to log
+# Logs a message with a timestamp.
+#
+# Description:
+#   Outputs the provided message(s) to standard output, prepended with the current date and
+#   time in the format [YYYY-MM-DD HH:MM:SS]. This timestamp helps in tracking log events.
+#
+# Arguments:
+#   One or more strings that form the log message.
+#
+# Outputs:
+#   Writes the timestamped log message to standard output.
+#
+# Example:
+#   lib::log "Server started"   # Outputs: [2025-02-28 09:45:00] Server started
+lib::log()
+{
+  printf '[%s] %s\n' "$(date '+%Y-%m-%d %H:%M:%S')" "$*"
+}
+
+# Simple error logging function
+#
+# @example
+# lib::error "Something went wrong"
+#
+# @description Log an error message to the console
+# @param $* Error message
+# Logs an error message with a timestamp to standard error.
+#
+# This function formats the provided message(s) by prefixing it with the current date
+# and time along with an "ERROR:" label, then outputs the result to STDERR.
+#
+# Arguments:
+#   $* - The error message or messages to be logged.
+#
+# Outputs:
+#   Writes the formatted error message to STDERR.
+#
+# Example:
+#   lib::error "Failed to read the configuration file."
+lib::error()
+{
+  printf '[%s] ERROR: %s\n' "$(date '+%Y-%m-%d %H:%M:%S')" "$*" >&2
+}
+
+LOG_LEVEL="${LOG_LEVEL:-INFO}"
+if [[ -z "${LOG_LEVELS[$LOG_LEVEL]+_}" ]]; then
+  lib::error "Invalid LOG_LEVEL: $LOG_LEVEL"
+  exit "${ERROR_CODES[INVALID_ARGUMENT]}"
+fi
+
+# Handle an error by logging an error message to the console
+# and exiting with an error code based on the error type.
+#
+# @example
+# lib::error::handle $LINENO $0
+#
+# @description Handle an error
+# @param $1 Line number
+# @param $2 Command
+# Logs an error message based on the previous command's exit code and the provided context.
+#
+# This function captures the exit code from the last executed command and, using the provided
+# line number and command string, determines the appropriate error message to log based on
+# predefined error codes stored in the ERROR_CODES associative array.
+#
+# Globals:
+#   ERROR_CODES - An associative array mapping error code names to numeric values.
+#   lib::error  - Logs error messages to STDERR.
+#
+# Arguments:
+#   line_no  - The line number in the script where the error occurred.
+#   command  - The command that was executed when the error occurred.
+#
+# Outputs:
+#   Writes a descriptive error message to STDERR.
+#
+# Returns:
+#   The exit code of the failed command.
+#
+# Example:
+#   # If a command fails with an exit code corresponding to an invalid argument:
+#   lib::error::handle 42 "some_command"
+#   # This logs: "Invalid argument at line 42 in command 'some_command'" (if the exit code matches ERROR_CODES[INVALID_ARGUMENT])
+lib::error::handle()
+{
+  local exit_code=$?
+  local line_no=$1
+  local command=$2
+
+  case $exit_code in
+    "${ERROR_CODES[INVALID_ARGUMENT]}")
+      lib::error "Invalid argument at line $line_no in command '$command'"
+      ;;
+    "${ERROR_CODES[COMMAND_NOT_FOUND]}")
+      lib::error "Command not found at line $line_no"
+      ;;
+    "${ERROR_CODES[FUNCTION_NOT_FOUND]}")
+      lib::error "Function not found at line $line_no in command '$command'"
+      ;;
+    "${ERROR_CODES[EXECUTION_FAILED]}")
+      lib::error "Execution failed at line $line_no in command '$command'"
+      ;;
+    *)
+      lib::error "Unknown error ($exit_code) at line $line_no in command '$command'"
+      ;;
+  esac
+
+  return $exit_code
+}
+
+# Throw an error by logging an error message to the console and exiting
+# with an error code based on the error type. The error code name is used
+# to determine the error code from the ERROR_CODES associative array.
+# The error message is passed as arguments to the function.
+#
+# @example
+# lib::error::throw INVALID_ARGUMENT "Invalid argument"
+# lib::error::throw COMMAND_NOT_FOUND "Command not found"
+# lib::error::throw FUNCTION_NOT_FOUND "Function not found"
+# lib::error::throw EXECUTION_FAILED "Execution failed"
+#
+# @description Throw an error
+# @param $1 Error code name
+# @param $* Error message
+# Logs an error message and terminates the script by performing cleanup with a specified error code.
+#
+# Globals:
+#   ERROR_CODES - Associative array mapping error code names to numeric exit values.
+#
+# Arguments:
+#   code_name - The key to retrieve the error code from the ERROR_CODES array.
+#   message   - The error message to log, constructed from all subsequent arguments.
+#
+# Outputs:
+#   Logs the error message to standard error.
+#
+# Returns:
+#   Exits the script via the cleanup function; does not return.
+#
+# Example:
+#   lib::error::throw "FILE_NOT_FOUND" "Required file not found: /path/to/file"
+lib::error::throw()
+{
+  local code_name=$1
+  shift
+  local message=$*
+
+  if [[ -z "${ERROR_CODES[$code_name]+_}" ]]; then
+    lib::error "Unknown error code: $code_name"
+    cleanup "${ERROR_CODES[INVALID_ARGUMENT]}"
+  fi
+
+  lib::error "$message"
+  cleanup "${ERROR_CODES[$code_name]}"
+}
+
+# Logs a message to the console if the current log level is set so that the
+# message is displayed. The log level is compared to the log level of the
+# message and if the message log level is greater than or equal to the current
+# log level, the message is displayed.
+# The log levels are defined in the LOG_LEVELS associative array.
+#
+# @example
+# logger::log "INFO" "This is an info message"
+# logger::log "DEBUG" "This is a debug message"
+# logger::log "WARN" "This is a warning message"
+# logger::log "ERROR" "This is an error message"
+#
+# @description Log a message to the console based on the log level setting.
+# @param $1 Log level
+# @param $2 Message
+# Logs a message if its severity meets or exceeds the global log level.
+#
+# Globals:
+#   LOG_LEVELS - Associative array mapping log level names to severity values.
+#   LOG_LEVEL  - The current log level threshold.
+#
+# Arguments:
+#   level: A string representing the log severity (e.g., DEBUG, INFO, WARN, ERROR).
+#   msg:   The message to log.
+#
+# Outputs:
+#   Prints a formatted log message with a timestamp to STDERR when the specified level qualifies.
+#
+# Example:
+#   logger::log INFO "Initialization complete"
+logger::log()
+{
+  local level=$1
+  if [[ -z "${LOG_LEVELS[$level]:-}" ]]; then
+    lib::error "Invalid log level: $level"
+    return 1
+  fi
+
+  shift
+  local msg="$*"
+
+  if [[ ${LOG_LEVELS[$level]} -ge ${LOG_LEVELS[$LOG_LEVEL]} ]]; then
+    printf '[%s] [%s]: %s\n' "$(date '+%Y-%m-%d %H:%M:%S')" "$level" "$msg" >&2
+  fi
+}
+
+# Logs a debug message to the console, if the current log level is set to DEBUG or greater.
+# The message is passed as arguments to the function.
+# The function is defined above.
+#
+# @example
+# logger::debug "This is a debug message"
+#
+# @description Log a debug message to the console
+# @param $* Message
+# Logs a debug-level message.
+#
+# This function logs a message at the DEBUG level by delegating to logger::log.
+# It accepts one or more arguments that form the debug message, which are passed along
+# to the underlying logger::log function.
+#
+# Example:
+#   logger::debug "Debug info for variable x:" "$x"
+logger::debug()
+{
+  logger::log "DEBUG" "$@"
+}
+
+# Logs an info message to the console, if the current log level is set to INFO or greater.
+# The message is passed as arguments to the function.
+# The function is defined above.
+#
+# @example
+# logger::info "This is an info message"
+#
+# @description Log an info message to the console
+# @param $* Message
+# Logs an informational message to the console.
+#
+# Description:
+#   This function wraps the logger::log function to log messages at the "INFO" level. All provided arguments are
+#   forwarded to logger::log, where the message is formatted and output based on the current logging configuration.
+#
+# Arguments:
+#   A message string followed by optional additional parameters used to format the message.
+#
+# Outputs:
+#   The formatted informational message is written to STDOUT if the INFO log level is enabled.
+#
+# Example:
+#   logger::info "Service started successfully on port" 8080
+logger::info()
+{
+  logger::log "INFO" "$@"
+}
+
+# Logs a warning message to the console, if the current log level is set to WARN or greater.
+# The message is passed as arguments to the function.
+# The function is defined above.
+#
+# @example
+# logger::warn "This is a warning message"
+#
+# @description Log a warning message to the console
+# @param $* Message
+# Logs a warning message.
+#
+# This function acts as a wrapper around `logger::log` by setting the log level to "WARN"
+# for all provided message arguments. It forwards the given messages to the logger for output.
+#
+# Arguments:
+#   A variable list of strings representing the warning message.
+#
+# Outputs:
+#   Writes a formatted warning message to the console.
+#
+# Example:
+#   logger::warn "Low disk space" "Free up some space to avoid issues"
+logger::warn()
+{
+  logger::log "WARN" "$@"
+}
+
+# Logs an error message to the console, if the current log level is set to ERROR or greater.
+# The message is passed as arguments to the function.
+# The function is defined above.
+#
+# @example
+# logger::error "This is an error message"
+#
+# @description Log an error message to the console
+# @param $* Message
+# Logs an error message at the ERROR level.
+#
+# This function wraps the generic logging mechanism to record error messages by automatically
+# specifying the ERROR severity level. It passes all provided arguments to the underlying logging function.
+#
+# Arguments:
+#   Error message(s) – One or more strings that describe the error.
+#
+# Example:
+#   logger::error "Unable to open file" "/path/to/file"
+logger::error()
+{
+  logger::log "ERROR" "$@"
+}
+
+# Cleanup function to remove temporary files and directories
+# when the script exits or is interrupted by a signal (e.g. Ctrl+C).
+# The function is registered with the `EXIT` trap.
+#
+# @description Remove temporary files and directories
+# Cleans up temporary resources before exiting.
+#
+# Globals:
+#   TEMP_DIR - Path to the temporary directory to be removed if it exists.
+#
+# Returns:
+#   Exits the script with the original exit code.
+#
+# Example:
+#   trap cleanup EXIT
+cleanup() {
+  local exit_code=${1:-$?}
+  if [[ -n ${TEMP_DIR:-} && -d $TEMP_DIR ]]; then
+    rm -rf "$TEMP_DIR"
+  fi
+  exit "$exit_code"
+}
+
+# Register the cleanup function to run on EXIT signal.
+# This ensures temporary files and directories are removed
+# when the script exits or is interrupted.
+trap cleanup EXIT
+
+# Handle errors by logging an error message to the console.
+# The `ERR` trap passes the line number and command to lib::error::handle.
+#
+# Example:
+#   lib::error::handle ${LINENO} "$BASH_COMMAND"
+trap 'lib::error::handle ${LINENO} "$BASH_COMMAND"' ERR

local/dfm/lib/utils.sh

@@ -0,0 +1,806 @@
+#!/usr/bin/env bash
+# dfm utility functions for common tasks
+# Source this file to use the functions in your scripts.
+#
+# @author Ismo Vuorinen <https://github.com/ivuorinen>
+# @license MIT
+set -euo pipefail
+
+# ANSI escape codes
+readonly RESET="\033[0m"
+readonly BOLD="\033[1m"
+readonly DIM="\033[2m"
+readonly ITALIC="\033[3m"
+readonly UNDERLINE="\033[4m"
+
+# Colors
+readonly BLACK="\033[30m"
+readonly RED="\033[31m"
+readonly GREEN="\033[32m"
+readonly YELLOW="\033[33m"
+readonly BLUE="\033[34m"
+readonly MAGENTA="\033[35m"
+readonly CYAN="\033[36m"
+readonly WHITE="\033[37m"
+
+# Prints the provided text in black color using ANSI escape codes.
+#
+# Globals:
+#   BLACK - ANSI escape code for black text.
+#   RESET - ANSI escape code to reset terminal formatting.
+#
+# Arguments:
+#   One or more strings that will be concatenated and printed.
+#
+# Outputs:
+#   Writes the colored text to STDOUT (without a trailing newline).
+#
+# Example:
+#   clr::black "This text will appear in black."
+clr::black()
+{
+  printf "${BLACK}%s${RESET}" "$*"
+}
+# Prints the provided text in red using ANSI escape codes.
+#
+# Globals:
+#   RED    - ANSI escape code for red.
+#   RESET  - ANSI escape code to reset terminal formatting.
+#
+# Arguments:
+#   One or more strings that will be printed in red.
+#
+# Outputs:
+#   Writes the red formatted text to STDOUT.
+#
+# Example:
+#   clr::red "Error: Invalid input"
+clr::red()
+{
+  printf "${RED}%s${RESET}" "$*"
+}
+# Prints the given text in green using ANSI escape codes.
+#
+# Arguments:
+#   * One or more strings to output in green. Multiple arguments are concatenated.
+#
+# Outputs:
+#   Writes the formatted green text to STDOUT without a trailing newline.
+#
+# Example:
+#   clr::green "Operation successful"
+clr::green()
+{
+  printf "${GREEN}%s${RESET}" "$*"
+}
+# Prints the provided text in yellow color.
+#
+# Globals:
+#   YELLOW - ANSI escape code for yellow text.
+#   RESET  - ANSI escape code to reset text formatting.
+#
+# Arguments:
+#   Any text passed as parameters will be printed in yellow.
+#
+# Outputs:
+#   Colored text printed to STDOUT.
+#
+# Example:
+#   clr::yellow "Hello, World!"
+clr::yellow()
+{
+  printf "${YELLOW}%s${RESET}" "$*"
+}
+# Prints the provided text in blue using ANSI escape codes.
+#
+# Globals:
+#   BLUE    ANSI escape sequence for blue text.
+#   RESET   ANSI escape sequence to reset text formatting.
+#
+# Arguments:
+#   $@      One or more strings to be printed in blue.
+#
+# Outputs:
+#   Prints the input text in blue to STDOUT.
+#
+# Example:
+#   clr::blue "Hello, World!"
+clr::blue()
+{
+  printf "${BLUE}%s${RESET}" "$*"
+}
+# Prints the provided text in magenta color.
+#
+# This function outputs one or more strings wrapped in ANSI escape sequences
+# to display them in magenta. It uses the global variables MAGENTA for the color
+# and RESET to revert to the default formatting.
+#
+# Globals:
+#   MAGENTA - ANSI escape sequence for magenta.
+#   RESET   - ANSI escape code to reset formatting.
+#
+# Arguments:
+#   One or more strings to print in magenta.
+#
+# Outputs:
+#   Writes the formatted string directly to STDOUT.
+#
+# Example:
+#   clr::magenta "Hello, World!"
+clr::magenta()
+{
+  printf "${MAGENTA}%s${RESET}" "$*"
+}
+# Prints the provided text in white color using ANSI escape codes.
+#
+# Globals:
+#   WHITE - ANSI escape code for white.
+#   RESET - ANSI escape code to reset text formatting.
+#
+# Arguments:
+#   Any text passed as arguments will be concatenated and printed.
+#
+# Outputs:
+#   Writes the formatted text to STDOUT.
+#
+# Example:
+#   clr::white "Hello, World!"
+clr::white()
+{
+  printf "${WHITE}%s${RESET}" "$*"
+}
+
+# Applies bold styling to the provided text and prints it to STDOUT.
+#
+# Globals:
+#   BOLD  - ANSI escape code for enabling bold text.
+#   RESET - ANSI escape code for resetting text formatting.
+#
+# Arguments:
+#   One or more strings to be printed in bold.
+#
+# Outputs:
+#   Bold-formatted text is printed to STDOUT.
+#
+# Example:
+#   style::bold "This is bold text"
+style::bold()
+{
+  printf "${BOLD}%s${RESET}" "$*"
+}
+# Print the provided text in a dim style using ANSI escape codes.
+#
+# Globals:
+#   DIM   - ANSI escape code for applying dim styling.
+#   RESET - ANSI escape code to reset text formatting.
+#
+# Arguments:
+#   $* - The text to be printed in dim style.
+#
+# Outputs:
+#   Writes the formatted dim text to STDOUT.
+#
+# Example:
+#   style::dim "This text will appear dimmed"
+style::dim()
+{
+  printf "${DIM}%s${RESET}" "$*"
+}
+# Prints the provided text in italic style using ANSI escape sequences.
+#
+# Globals:
+#   ITALIC - ANSI escape sequence for italic text styling.
+#   RESET  - ANSI escape sequence to reset text styling.
+#
+# Arguments:
+#   All passed arguments are combined and printed in italic formatting.
+#
+# Outputs:
+#   The styled text is printed to STDOUT without an automatic newline.
+#
+# Example:
+#   style::italic "Hello, world!"
+style::italic()
+{
+  printf "${ITALIC}%s${RESET}" "$*"
+}
+# Underlines the provided text using ANSI escape codes.
+#
+# Globals:
+#   UNDERLINE - ANSI escape sequence to start underlining.
+#   RESET     - ANSI escape sequence to reset text formatting.
+#
+# Arguments:
+#   $* - The text to be underlined.
+#
+# Outputs:
+#   Prints the underlined text to STDOUT.
+#
+# Example:
+#   style::underline "Underlined text"
+style::underline()
+{
+  printf "${UNDERLINE}%s${RESET}" "$*"
+}
+
+# Prints a formatted line to STDOUT using the provided format string and arguments.
+#
+# Globals:
+#   RESET - ANSI escape code to reset text formatting.
+#
+# Arguments:
+#   $1 - A format string that may include ANSI styling codes (do not include a conversion specifier for the text).
+#   $@ - The text to be formatted and printed.
+#
+# Outputs:
+#   Writes the formatted text to STDOUT with an appended newline, ensuring that styling is reset afterward.
+#
+# Example:
+#   list::print_formatted "${BOLD}" "Bold Text"
+list::print_formatted()
+{
+  local format=$1
+  shift
+  printf "${format}%s${RESET}\n" "$@"
+}
+
+# Prints a formatted header with a decorative underline.
+#
+# Globals:
+#   BOLD   - ANSI escape code for bold text.
+#   BLUE   - ANSI escape code for blue text.
+#   RESET  - ANSI escape code to reset text formatting.
+#
+# Arguments:
+#   $1 - The header title to be displayed.
+#
+# Outputs:
+#   Writes a styled header to STDOUT, including the title in bold blue and a subsequent decorative line.
+#
+# Example:
+#   list::print_header "Available Commands"
+list::print_header()
+{
+  printf "\n  ${BOLD}${BLUE}%s${RESET}\n" "$1"
+  printf "%s\n" "  $(printf '%.s─' {1..60})"
+}
+
+# Prints a group header with bold yellow formatting.
+#
+# Globals:
+#   YELLOW - ANSI escape code for yellow color.
+#   BOLD   - ANSI escape code for bold text.
+#   RESET  - ANSI escape code to reset text formatting.
+#
+# Arguments:
+#   group  - The title text to display as the group header.
+#
+# Outputs:
+#   Writes the formatted group header to STDOUT.
+#
+# Example:
+#   list::print_group "My Group"
+list::print_group()
+{
+  local group=$1
+  printf "\n  ${YELLOW}${BOLD}%s${RESET}\n\n" "$group"
+}
+
+# Prints a formatted command with an optional description.
+#
+# Globals:
+#   BOLD   - ANSI escape sequence for bold text.
+#   CYAN   - ANSI escape sequence for cyan text.
+#   RESET  - ANSI escape sequence to reset text formatting.
+#   DIM    - ANSI escape sequence for dim text.
+#
+# Arguments:
+#   cmd    - The command name to display.
+#   desc   - Optional description of the command (defaults to an empty string).
+#
+# Outputs:
+#   Writes the formatted command and description to STDOUT.
+#
+# Example:
+#   list::print_command "ls" "List directory contents"
+list::print_command()
+{
+  local cmd=$1
+  local desc=${2:-""}
+  printf "  ${BOLD}${CYAN}%-15s${RESET} ${DIM}%s${RESET}\n" "$cmd" "$desc"
+}
+
+# Prints a subcommand in a formatted style.
+#
+# This function displays a subcommand name in green with a fixed width for neat alignment,
+# followed by an optional description text. The ANSI escape codes for green text and reset
+# styling are used to highlight the subcommand.
+#
+# Globals:
+#   GREEN  - ANSI escape code applied to the subcommand name.
+#   RESET  - ANSI escape code used to reset text formatting.
+#
+# Arguments:
+#   cmd   - The subcommand name to print.
+#   desc  - (Optional) A description string for the subcommand. Defaults to empty if not provided.
+#
+# Outputs:
+#   Prints the formatted subcommand and optional description to STDOUT.
+#
+# Example:
+#   list::print_subcommand "deploy" "Deploy the application to the production server"
+list::print_subcommand()
+{
+  local cmd=$1
+  local desc=${2:-""}
+  printf "    ${GREEN}%-13s${RESET} ${desc}\n" "$cmd"
+}
+
+# Iterates over functions defined in a command file and prints each as a formatted subcommand.
+#
+# This function reads function names from the specified command file, retrieves their descriptions
+# (removing any '@description' prefix), and prints each function name as a bullet point with its
+# associated description if available.
+#
+# Arguments:
+#   cmd_file - The path to the command file containing function definitions.
+#
+# Outputs:
+#   Prints formatted subcommand entries to STDOUT.
+#
+# Example:
+#   list::loop_functions "/path/to/command_file.sh"
+list::loop_functions()
+{
+  local cmd_file="$1"
+  while IFS= read -r func; do
+    # Get the function description from the function definition in the
+    # command file. If no description is found, print only the function name.
+    # The description is printed without the @description prefix.
+    # If the function is not found, print only the function name.
+    # The function name is printed with a bullet point.
+    local doc
+    doc=$(main::get_function_description "$cmd_file" "$func")
+    if [[ -n "$doc" ]]; then
+      list::print_subcommand "$func:" "${doc#*@description}"
+    else
+      list::print_subcommand "$func" ""
+    fi
+  done < <(main::get_command_functions "$cmd_file")
+}
+
+# Extracts and prints the documentation associated with a specific function from a command file.
+#
+# Globals:
+#   None
+#
+# Arguments:
+#   cmd_file - The file containing function definitions and their associated documentation.
+#   func     - The name of the function whose documentation should be extracted.
+#
+# Outputs:
+#   Writes the extracted documentation tags and their content to STDOUT.
+#
+# Returns:
+#   None
+#
+# Example:
+#   list::get_function_docs "commands.sh" "build_project"
+list::get_function_docs()
+{
+  local cmd_file="$1"
+  local func="$2"
+
+  awk -v func="$func" '
+        # Start collecting documentation when a function is found and the line contains @
+        /^[[:space:]]*#[[:space:]]*@/ {
+            tag = $2
+            sub(/^[[:space:]]*#[[:space:]]*@[[:space:]]*[a-zA-Z]+[[:space:]]*/, "")
+            docs[tag] = $0
+            last_tag = tag
+        }
+
+        # Collect multi-line documentation
+        /^[[:space:]]*#/ && last_tag && !/^[[:space:]]*#[[:space:]]*@/ {
+            sub(/^[[:space:]]*#[[:space:]]*/, "")
+            docs[last_tag] = docs[last_tag] " " $0
+        }
+
+        # Empty line or comment line ends documentation
+        !/^[[:space:]]*#/ {
+            last_tag = ""
+        }
+
+        # When the function is found, print the documentation
+        $0 ~ "^[[:space:]]*(function[[:space:]]+)?" func "\\(\\)" {
+            for (tag in docs) {
+                printf "@%s %s\n", tag, docs[tag]
+            }
+        }
+    ' "$cmd_file"
+}
+
+# Check if a command exists in the current environment and return 0 if it does.
+# Otherwise, return 1.
+#
+# @example
+# if utils::is_installed curl; then
+#    echo "curl is installed"
+# else
+#  echo "curl is not installed"
+# fi
+#
+# @description Check if a command exists
+# @param $1 Command to check
+# Checks if a specified command is available in the system.
+#
+# Arguments:
+#   $1 - Command name to check.
+#
+# Returns:
+#   0 if the command is found in the system's PATH, 1 otherwise.
+#
+# Example:
+#   utils::is_installed "git" && echo "Git is installed" || echo "Git is not installed"
+utils::is_installed()
+{
+  command -v "$1" > /dev/null 2>&1
+}
+
+# Check if an executable exists in one of the directories listed in PATH and
+# return 0 if it does. Otherwise, return 1.
+#
+# @example
+# if utils::in_path ls; then
+#    echo "ls is available in PATH"
+# else
+#   echo "ls is not available in PATH"
+# fi
+#
+# @description Check if an executable is in PATH
+# @param $1 Command to check
+# Checks if a specified executable is available in one of the directories in the PATH.
+#
+# Globals:
+#   PATH - The system's PATH environment variable listing directories to search.
+#
+# Arguments:
+#   cmd: The name of the executable file to look for.
+#
+# Returns:
+#   0 if the executable is found in one of the PATH directories, 1 otherwise.
+#
+# Example:
+#   utils::in_path ls && echo "ls is available in PATH"
+utils::in_path()
+{
+  local cmd=$1
+  local result=1
+  IFS=: read -ra path <<< "$PATH"
+  for p in "${path[@]}"; do
+    if [[ -x "$p/$cmd" ]]; then
+      result=0
+      break
+    fi
+  done
+  return $result
+}
+
+# Retry a command until it succeeds or the maximum number of retries is reached.
+# Logs a warning message if the command fails and is retried after a short delay.
+#
+# @example
+# if utils::retry 3 curl -sSL https://example.com; then
+#    echo "Success"
+# else
+#   echo "Failed"
+# fi
+#
+# @description Retry a command
+# @param $1 Maximum number of retries
+# @param $2.. Command to run
+# @return 0 if the command succeeds, 1 otherwise
+# Retries a command until it succeeds or the maximum number of attempts is reached.
+#
+# Arguments:
+#   tries                   - Maximum number of attempts to execute the command.
+#   command and its args    - The command to run and any arguments to pass.
+#
+# Globals:
+#   logger::warn            - Logs a warning message for each failed attempt.
+#
+# Outputs:
+#   Warning messages are printed to STDERR for each retry.
+#
+# Returns:
+#   0 if the command eventually succeeds; 1 if all attempts fail.
+#
+# Example:
+#   utils::retry 3 my_command --option value
+#
+# Dependencies:
+#   logger::warn
+utils::retry()
+{
+  local tries=$1
+  shift
+  local count=1
+
+  until "$@"; do
+    [[ $count -gt $tries ]] && return 1
+    logger::warn "Failed, retry $count/$tries"
+    ((count++))
+    sleep 1
+  done
+  return 0
+}
+
+# Ask for confirmation before proceeding. The default value is used if the user
+# presses Enter without providing an answer.
+#
+# @example
+# if utils::interactive::confirm "Are you sure?"; then
+#    echo "Confirmed"
+# else
+#   echo "Not confirmed"
+# fi
+#
+# @description Confirm an action
+# @param $1 Prompt message
+# @param $2 Default value
+# Prompts the user for confirmation with a yes/no question.
+#
+# Arguments:
+#   prompt: The message displayed to the user when asking for confirmation.
+#   default: An optional default answer used if no input is provided (defaults to "Y").
+#
+# Outputs:
+#   Repeatedly prompts the user until a valid yes or no answer is received.
+#   An error message is displayed for any invalid response.
+#
+# Returns:
+#   0 if the user confirms (answers yes), 1 if the user declines (answers no).
+#
+# Example:
+#   if utils::interactive::confirm "Do you want to proceed?"; then
+#       echo "Proceeding..."
+#   else
+#       echo "Operation cancelled."
+#   fi
+utils::interactive::confirm()
+{
+  local prompt=$1
+  local default=${2:-Y}
+
+  while true; do
+    read -rp "$prompt [Y/n]: " response
+    case ${response:-$default} in
+      [Yy]*) return 0 ;;
+      [Nn]*) return 1 ;;
+      *) echo "Please answer yes or no" ;;
+    esac
+  done
+}
+
+# Find all command files in the cmd directory and return them
+# as a space-separated string of filenames (e.g. "cmd1.sh cmd2.sh").
+#
+# The function uses a while loop to read the output of the find command
+# line by line. The -print0 option is used to separate the filenames with
+# a null character (\0) instead of a newline. This is necessary to handle
+# filenames with spaces correctly.
+#
+# The read command reads the null-separated filenames and appends them to
+# the cmd_files array. Finally, the function prints the array elements
+# separated by a space.
+#
+# Finds all command script files (*.sh) in the directory specified by DFM_CMD_DIR.
+#
+# Globals:
+#   DFM_CMD_DIR - The directory to search for command files.
+#
+# Outputs:
+#   Echoes a space-separated list of command file paths.
+#
+# Example:
+#   files=$(main::find_commands)
+#   echo "$files"  # Displays the list of found command files.
+main::find_commands()
+{
+  local cmd_files=()
+  while IFS= read -r -d '' file; do
+    cmd_files+=("$file")
+  done < <(find "$DFM_CMD_DIR" -type f -name "*.sh" -print0)
+  echo "${cmd_files[@]}"
+}
+
+# Get the function names from a command file.
+#
+# The function uses grep to find function definitions (function xxx() or xxx())
+# and sed to extract the function names. The function names are printed one per
+# line.
+#
+# @param cmd_file The command file to extract function names from.
+# Extracts the names of functions defined in the specified command file.
+#
+# This function parses the provided file for Bash function definitions using
+# regex patterns matching both "function name() {" and "name() {" styles.
+# It outputs the names of the functions, one per line.
+#
+# Globals:
+#   None.
+#
+# Arguments:
+#   cmd_file - Path to the file containing Bash function definitions.
+#
+# Outputs:
+#   Writes the list of function names to STDOUT.
+#
+# Returns:
+#   A list of function names extracted from the file.
+#
+# Example:
+#   main::get_command_functions "/path/to/command_file.sh"
+main::get_command_functions()
+{
+  local cmd_file="$1"
+  # Find function definitions (function xxx() or xxx())
+  grep -E '^[[:space:]]*(function[[:space:]]+)?[a-zA-Z0-9_]+\(\)[[:space:]]*{' "$cmd_file" \
+    | sed -E 's/^[[:space:]]*(function[[:space:]]+)?([a-zA-Z0-9_]+).*/\2/'
+}
+
+# Get the description of a function from a command file.
+#
+# The function uses grep to find the function definition and sed to extract
+# the description. The description is printed without the @description prefix.
+#
+# @param cmd_file The command file to extract the function description from.
+# @param func The function name.
+# Retrieves the annotated description of a specified function from a command file.
+#
+# This function searches the provided command file for an "@description" comment
+# preceding the definition of the designated function. It then extracts and prints
+# the description text. If no description is found, nothing is printed.
+#
+# Arguments:
+#   cmd  - Command name or path to the file containing the function definitions.
+#   func - Name of the function whose description is to be extracted.
+#
+# Outputs:
+#   The extracted description text is printed to STDOUT.
+#
+# Example:
+#   desc=$(main::get_function_description "install" "my_function")
+main::get_function_description()
+{
+  local cmd_file="$1"
+  local func="$2"
+
+  if [[ ! -f "$cmd_file" ]]; then
+    [[ -n ${DFM_CMD_DIR:-} ]] || return 1
+    cmd_file="${DFM_CMD_DIR}/${cmd_file}"
+    [[ "$cmd_file" == *.sh ]] || cmd_file="${cmd_file}.sh"
+  fi
+
+  [[ -f "$cmd_file" ]] || return 1
+
+  local escaped_func
+  escaped_func=$(printf '%s' "$func" | sed 's/[][\\.^$*+?(){}|]/\\&/g')
+
+  grep -B5 -E "^[[:space:]]*(function[[:space:]]*)?${escaped_func}[[:space:]]*\\(\\)[[:space:]]*(\\{)?[[:space:]]*$" "$cmd_file" \
+    | grep "@description" \
+    | sed -E 's/^[[:space:]]*#[[:space:]]*@description[[:space:]]*//'
+}
+
+# List all available commands and their functions.
+#
+# The function uses main::find_commands to get a list of command files.
+# It then iterates over the files and prints the command name and
+# its functions.
+#
+# Lists all available commands and their subcommands.
+#
+# Description:
+#   Uses main::find_commands to locate command files and prints a header followed by a group title.
+#   For each command file, extracts the command name (removing the '.sh' extension) and prints it,
+#   then calls list::loop_functions to display detailed subcommands.
+#
+# Globals:
+#   None.
+#
+# Arguments:
+#   None.
+#
+# Outputs:
+#   Writes the formatted list of commands and associated subcommands to STDOUT.
+#
+# Example:
+#   main::list_available_commands
+main::list_available_commands()
+{
+  local cmd_files
+  cmd_files=$(main::find_commands)
+
+  list::print_header "dfm - dotfiles manager"
+  list::print_group "Available commands"
+
+  for cmd_file in $cmd_files; do
+    local cmd_name
+    cmd_name=$(basename "$cmd_file" .sh)
+    list::print_command "$cmd_name"
+
+    list::loop_functions "$cmd_file"
+  done
+}
+
+# Execute a command function.
+#
+# The function loads the command file and checks if the function exists.
+# If the function exists, it executes the function with the provided arguments.
+#
+# @param cmd The command name.
+# @param func The function name.
+# @param args The function arguments.
+# Executes a specified function from a command file.
+#
+# This function validates and runs a function defined within a command file. It checks that both
+# the command and function names contain only allowed characters (alphanumeric, underscores, or dashes),
+# verifies that the command file (located in DFM_CMD_DIR) exists, is readable, and is free of syntax errors,
+# and then sources the file. If the specified function exists in the file, it is executed with any additional
+# arguments provided.
+#
+# Globals:
+#   DFM_CMD_DIR - Directory containing command files.
+#
+# Arguments:
+#   command: The command file name (without .sh extension) to execute. Must match ^[a-zA-Z0-9_-]+$.
+#   function: The function name to be executed from the command file. Must match ^[a-zA-Z0-9_-]+$.
+#   [additional arguments]: Extra parameters to pass to the executed function.
+#
+# Outputs:
+#   Any output generated by the executed function. Error messages are output via lib::error.
+#
+# Returns:
+#   0 if the function executes successfully; 1 if an error occurs (e.g., invalid names, missing or unreadable
+#   command file, syntax errors in the command file, or if the specified function is not found).
+#
+# Example:
+#   main::execute_command "deploy" "run_deploy" "arg1" "arg2"
+main::execute_command()
+{
+  local cmd="$1"
+  shift
+  local func="$1"
+  shift
+
+  # Validate input
+  if [[ ! "$cmd" =~ ^[a-zA-Z0-9_-]+$ ]] || [[ ! "$func" =~ ^[a-zA-Z0-9_-]+$ ]]; then
+    lib::error "Invalid command or function name"
+    return 1
+  fi
+
+  local cmd_file="${DFM_CMD_DIR}/${cmd}.sh"
+  if [[ ! -f "$cmd_file" ]] || [[ ! -r "$cmd_file" ]]; then
+    lib::error "Command '$cmd' not found"
+    return 1
+  fi
+
+  # Validate command file
+  if ! bash -n "$cmd_file"; then
+    lib::error "Command file '$cmd' contains syntax errors"
+    return 1
+  fi
+
+  # Source the command file
+  # shellcheck source=/dev/null
+  source "$cmd_file"
+
+  # Check if the function exists
+  if ! declare -f "$func" > /dev/null; then
+    lib::error "Function '$func' not found in command '$cmd'"
+    return 1
+  fi
+
+  # Run the function with the provided arguments
+  "$func" "$@"
+}

package.json

@@ -10,7 +10,7 @@
     "fix:markdown": "npx markdownlint -df .",
     "lint:prettier": "npx prettier . --check",
     "fix:prettier": "npx prettier . --write",
-    "test": "echo \"Error: no test specified\" && exit 0"
+    "test": "npx bats --recursive tests/"
   },
   "repository": {
     "type": "git",
@@ -29,7 +29,8 @@
   "devDependencies": {
     "@ivuorinen/base-configs": "^2.0.0",
     "@types/node": "^24.0.1",
+    "bats": "^1.12.0",
     "typescript": "^5.8.3"
   },
-  "packageManager": "yarn@1.22.22"
+  "packageManager": "yarn@1.22.22+sha512.a6b2f7906b721bba3d67d4aff083df04dad64c399707841b7acf00f6b133b7ac24255f2652fa22ae3534329dc6180534e98d17432037ff6fd140556e2bb3137e"
 }

tests/dfm/helpers.bash

@@ -0,0 +1,16 @@
+run_with_dfm() {
+  local cmd="$*"
+  run env \
+    PROJECT_ROOT="$PROJECT_ROOT" \
+    DFM_CMD_DIR="$PROJECT_ROOT/local/dfm/cmd" \
+    DFM_LIB_DIR="$PROJECT_ROOT/local/dfm/lib" \
+    DOTFILES="${DOTFILES:-$PROJECT_ROOT}" \
+    NO_AUTOMATION="${NO_AUTOMATION:-1}" \
+    TEMP_DIR="$TEMP_DIR" \
+    bash -c 'set -e
+      cmd="$1"
+      source "$PROJECT_ROOT/local/dfm/lib/common.sh"
+      source "$PROJECT_ROOT/local/dfm/lib/utils.sh"
+      set +e
+      eval "$cmd"' bash "$cmd"
+}

tests/dfm/main.bats

@@ -0,0 +1,56 @@
+load "$BATS_TEST_DIRNAME/helpers.bash"
+
+setup() {
+  set -euo pipefail
+  PROJECT_ROOT="$BATS_TEST_DIRNAME/../.."
+  TEMP_DIR="$(mktemp -d)"
+  export TEMP_DIR
+}
+
+teardown() {
+  [[ -n "${TEMP_DIR:-}" ]] && rm -rf "$TEMP_DIR"
+}
+
+@test "list_available_commands shows commands" {
+  run_with_dfm main::list_available_commands
+  [ "$status" -eq 0 ]
+  echo "$output" | grep -q "Available commands"
+  echo "$output" | grep -q "install"
+}
+
+@test "interactive confirm returns 0 on yes" {
+  run_with_dfm 'utils::interactive::confirm "Proceed?" <<< "y"; echo $?'
+  [ "$status" -eq 0 ]
+  [ "${lines[-1]}" = "0" ]
+}
+
+@test "interactive confirm returns 1 on no" {
+  run_with_dfm 'utils::interactive::confirm "Proceed?" <<< "n"; echo $?'
+  [ "$status" -eq 0 ]
+  [ "${lines[-1]}" = "1" ]
+}
+
+@test "execute_command runs function" {
+  run_with_dfm "main::execute_command install fonts"
+  [ "$status" -eq 0 ]
+  echo "$output" | grep -q "Installing fonts"
+}
+
+@test "execute_command fails on missing function" {
+  run_with_dfm "main::execute_command install nofunc >/dev/null 2>&1"
+  [ "$status" -eq 1 ]
+}
+
+@test "install all respects skip options" {
+  run_with_dfm "main::execute_command install all --no-brew --no-cargo --no-automation"
+  [ "$status" -eq 0 ]
+  echo "$output" | grep -q "Installing fonts"
+  [[ "$output" != *"Installing Homebrew"* ]]
+  [[ "$output" != *"Rust and cargo packages"* ]]
+}
+
+@test "get_function_description returns description" {
+  run_with_dfm "main::get_function_description \"$PROJECT_ROOT/local/dfm/cmd/install.sh\" fonts"
+  [ "$status" -eq 0 ]
+  echo "$output" | grep -q "Install all configured fonts"
+}

yarn.lock

@@ -1252,6 +1252,11 @@ balanced-match@^3.0.0:
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-3.0.1.tgz#e854b098724b15076384266497392a271f4a26a0"
   integrity sha512-vjtV3hiLqYDNRoiAv0zC4QaGAMPomEoq83PRmYIofPswwZurCeWR5LByXm7SyoL0Zh5+2z0+HC7jG8gSZJUh0w==
 
+bats@^1.12.0:
+  version "1.12.0"
+  resolved "https://registry.yarnpkg.com/bats/-/bats-1.12.0.tgz#3ed99170325141e5d6dd53a84c3e5a702d5ab5be"
+  integrity sha512-1HTv2n+fjn3bmY9SNDgmzS6bjoKtVlSK2pIHON5aSA2xaqGkZFoCCWP46/G6jm9zZ7MCi84mD+3Byw4t3KGwBg==
+
 before-after-hook@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/before-after-hook/-/before-after-hook-4.0.0.tgz#cf1447ab9160df6a40f3621da64d6ffc36050cb9"