The File System Formatter script is a Python program that automates the process of formatting file and directory names within a file system. It applies a set of rules to ensure consistent naming conventions and improve organization. The script allows users to customize the formatting options and provides options for dry run and verbose output.

file_system_formatter.py

# !/usr/bin/env python3
# -*- coding: utf-8 -*-

# Author: Etienne Collin
# Date: 2023/12/20
# Email: collin.etienne.contact@gmail.com

################################################################################
# The File System Formatter script is a Python program that automates the process of formatting file and
# directory names within a file system. It applies a set of rules to ensure consistent naming conventions and
# improve organization. The script allows users to customize the formatting options and provides options for
# dry run and verbose output.
################################################################################
# Key Features:
#   - To prevent a directory from being formatted, add a file named ".donotformat" to the directory
#   - Renames files and directories to meet specified formatting rules
#   - Excludes certain files, extensions, and characters from the formatting process
#   - Treat files with a certain extensions as directories
#   - Deletes specified files from the file system
#   - Handles special characters, accents, and spaces in names
#   - Supports both dry run mode (previewing changes) and actual formatting
#   - Provides verbose output to display the changes made during formatting
################################################################################
# Usage:
#   - Run the script with the desired command-line arguments specifying the paths to the directories or files
#       to be formatted.
#   - Follow the prompts to choose dry run mode, verbose output, and confirmation of the formatting operation.
#   - The script will recursively format the contents of the specified directories, renaming files and directories
#       according to the specified rules.
#   - Optionally, specified files can be deleted from the file system.
#   - The script provides a summary of the formatting process, including the number of files and directories
#       renamed or deleted.
################################################################################
# Note: It is recommended to review the formatting rules and backup important files before running the script
# to avoid any unintended changes to the file system.
################################################################################

import os
import re
import sys

from unidecode import unidecode

EXCLUDED_FILES = [
    "Cargo.lock",
    "Cargo.toml",
    "LICENSE",
    "CNAME",
    "README.md",
    "target",
    "debug",
    "src",
    "lib",
    "out",
    "bin",
]
EXCLUDED_EXTENSIONS = [
    ".class",
    ".java",
    ".iml",
    ".d",
    ".o",
    ".rmeta",
    ".qpf",
    ".qsf",
    ".qip",
    ".qdf",
    ".qws",
    ".qps",
    ".bsf",
    ".bdf",
    ".v",
    ".rpt",
]
TREAT_EXTENSION_AS_DIR = [
    ".zip",
]
DELETE_FILES = [".DS_Store", "indent.log"]
BAD_CHARS = ',&=+@#^$%*!`"?|<>:'
FILE_SEPARATOR = "_"
DIR_SEPARATOR = "-"

global verbose, dryRun, filesRenamed, dirRenamed, filesDeleted
verbose = False
dryRun = False
filesRenamed = 0
dirRenamed = 0
filesDeleted = 0


def isElementFormatted(element: str, isElementAFile: bool):
    nameExtension = os.path.splitext(element)
    generalConditions = (
        (element.islower() or element.isdigit())
        and element.isascii()
        and " " not in element
        and not containsCharsNotSurroundedByDigits(nameExtension[0], ".")
    )

    if isElementAFile and nameExtension[1] not in TREAT_EXTENSION_AS_DIR:
        return (
            generalConditions
            and DIR_SEPARATOR not in element
            and not substringOfRepeatedCharsExists(element, FILE_SEPARATOR)
            and all([False if char in nameExtension[0] else True for char in BAD_CHARS])
        )
    else:
        return (
            element == "."
            or generalConditions
            and FILE_SEPARATOR not in element
            and not substringOfRepeatedCharsExists(element, DIR_SEPARATOR)
            and all([False if char in element else True for char in BAD_CHARS])
        )


def renameElement(elementPath: str, separator: str):
    # Get name of element
    element = os.path.basename(elementPath)

    # Rewrite in lowercase and remove accents
    normalizedElement = unidecode(element.lower())

    fileName = normalizedElement
    extension = ""
    # If file, split into name and extension
    if os.path.isfile(elementPath):
        fileName, extension = os.path.splitext(normalizedElement)
        # Remove spaces in extension
        extension = re.sub(r"[\s]", "", extension)

    # Delete ' in file name
    fileName = re.sub(r"[']", "", fileName)
    # Replace _ with separator except for the first character
    fileName = fileName[0] + re.sub(r"[_]", separator, fileName[1:])
    # Replace bad characters with separator
    fileName = re.sub(rf"[\s{BAD_CHARS}]", separator, fileName)
    # Replace all dots and dashes that are not surrounded by digits with a separator
    fileName = re.sub(r"(?<!\d)[-\.]|[-\.](?!\d)", separator, fileName)
    # Replace all substrings of separator with a single separator
    fileName = re.sub(rf"({separator})\1+", separator, fileName)

    # Get full name of renamed element
    renamedElement = fileName + extension

    # Return elementPath if element is not renamed
    if element == renamedElement:
        return elementPath

    # Rename element
    renamedElementPath = os.path.join(os.path.dirname(elementPath), renamedElement)
    if not dryRun:
        try:
            os.rename(elementPath, renamedElementPath)
        except OSError:
            print(f"| Error renaming {elementPath} --> {renamedElementPath}")
            return elementPath

    # Print changes
    if verbose or dryRun:
        print(f"| Renamed {elementPath} --> {renamedElement}")

    return renamedElementPath


def containsCharsNotSurroundedByDigits(string: str, chars: str):
    # Check if string contains characters not surrounded by digits
    return bool(re.search(rf"(?<!\d)[{chars}]|[{chars}](?!\d)", string))


def substringOfRepeatedCharsExists(string: str, chars: str):
    # Check if substring of repeated characters exists
    return bool(re.search(rf"([{chars}])\1+", string))


def formatDirectory(path: str):
    global dirRenamed, filesRenamed, filesDeleted

    elements = os.listdir(path)

    if ".donotformat" in elements:
        return

    for element in elements:
        # Get path of element
        elementPath = os.path.join(path, element)

        # Delete files specified in DELETE_FILES
        if os.path.isfile(elementPath) and element in DELETE_FILES:
            # Delete file
            if not dryRun:
                os.remove(elementPath)

            # Increment deleted files counter
            filesDeleted += 1

            if verbose or dryRun:
                print(f"| Deleted {element}")

            continue

        # Ignore hidden files and excluded files/extensions
        if element[0] == "." or element in EXCLUDED_FILES or os.path.splitext(element)[1] in EXCLUDED_EXTENSIONS:
            continue

        # Check if element is a directory or a file
        if os.path.isdir(elementPath):
            # Rename directory if it is not yet formatted...
            if not isElementFormatted(element, False):
                # Rename directory
                renamedElementPath = renameElement(elementPath, DIR_SEPARATOR)

                # If directory is renamed, increment renamed directories counter
                if elementPath != renamedElementPath:
                    dirRenamed += 1

                # Recursively rename contents of directory
                if dryRun:
                    formatDirectory(elementPath)
                else:
                    formatDirectory(renamedElementPath)
            else:
                # Recursively rename contents of directory
                formatDirectory(elementPath)
        elif os.path.isfile(elementPath) and not isElementFormatted(element, True):
            # Rename file
            renamedElementPath = renameElement(
                elementPath,
                FILE_SEPARATOR if os.path.splitext(element)[1] not in TREAT_EXTENSION_AS_DIR else DIR_SEPARATOR,
            )

            # If file is renamed, increment renamed files counter
            if elementPath != renamedElementPath:
                filesRenamed += 1


def initializeFormatter(path: str):
    global dirRenamed, filesRenamed

    # Remove trailing slash
    if path[-1] == "/":
        path = path[:-1]

    element = os.path.basename(path)

    # Check if element is a directory or a file and if it is formatted
    if os.path.isdir(path):
        if not isElementFormatted(element, False):
            # Rename directory
            renamedPath = renameElement(path, DIR_SEPARATOR)

            # If directory is renamed, increment renamed directories counter
            if path != renamedPath:
                dirRenamed += 1

            # Format contents of directory
            if dryRun:
                formatDirectory(path)
            else:
                formatDirectory(renamedPath)
        else:
            # Recursively rename contents of directory
            formatDirectory(path)
    elif os.path.isfile(path) and not isElementFormatted(element, True):
        # Rename file
        renamedPath = renameElement(
            path,
            FILE_SEPARATOR if os.path.splitext(element)[1] not in TREAT_EXTENSION_AS_DIR else DIR_SEPARATOR,
        )

        # If file is renamed, continue
        if path != renamedPath:
            # Increment renamed files counter
            filesRenamed += 1


def launcher():
    global verbose, dryRun

    print("------------")

    while True:
        runDry = input("| Do you want to run a dry run? (y/n): ").lower()

        if runDry == "y":
            dryRun = True
            break
        elif runDry == "n":
            dryRun = False
            break
        else:
            print("| Invalid input")

    if not dryRun:
        while True:
            runVerbose = input("| Do you want to print the changes? (y/n): ").lower()

            if runVerbose == "y":
                verbose = True
                break
            elif runVerbose == "n":
                verbose = False
                break
            else:
                print("| Invalid input")

        while True:
            confirmFormat = input("| Are you sure you want to format your file system? (y/n): ").lower()

            if confirmFormat == "y":
                break
            elif confirmFormat == "n":
                print("| Your file system has not been formatted")
                return
            else:
                print("| Invalid input")

    print("------------")

    for arg in sys.argv[1:]:
        try:
            initializeFormatter(str(arg))
            print(f'| Done formatting "{str(arg)}"')
        except FileNotFoundError:
            print("| File not found")
            print(f'| Error encountered while formatting "{str(arg)}"')
        except NotADirectoryError:
            print("| Directory not found")
            print(f'| Error encountered while formatting "{str(arg)}"')

    print("------------")
    print("| Your file system has properly been formatted")
    print(f"| Files renamed: {filesRenamed}")
    print(f"| Directories renamed: {dirRenamed}")
    print(f"| Files deleted: {filesDeleted}")
    print("------------")
    if dryRun:
        print("| Script ran in dry run mode")
        print("------------")


launcher()