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nginx config file formatter/beautifier

nginx config file formatter/beautifier written in Python with no additional dependencies. It can be used as library or standalone script. It formats nginx configuration files in consistent way, described below:

  • All lines are indented in uniform manner, with 4 spaces per level. Number of spaces is customizable.
  • Neighbouring empty lines are collapsed to at most two empty lines.
  • Curly braces placement follows Java convention.
  • Whitespaces are collapsed, except in comments and quotation marks.

Installation

Python 3.4 or later is needed to run this program. The easiest way is to download package from PyPI:

pip3 install nginxfmt

Manual installation

The simplest form of installation would be copying nginxfmt.py to your scripts' directory. It has no 3-rd party dependencies.

You can also clone the repository and symlink the executable:

cd
git clone https://github.com/slomkowski/nginx-config-formatter.git
ln -s ~/nginx-config-formatter/nginxfmt.py ~/bin/nginxfmt.py

Usage as standalone script

It can format one or several files. Result is by default saved to the original file, but can be redirected to stdout. It can also function in piping mode, with --pipe switch.

usage: nginxfmt.py [-h] [-v] [-] [-p | -b] [-i INDENT] [config_files ...]

Formats nginx configuration files in consistent way.

positional arguments:
  config_files          configuration files to format

optional arguments:
  -h, --help            show this help message and exit
  -v, --verbose         show formatted file names
  -, --pipe             reads content from standard input, prints result to stdout
  -p, --print-result    prints result to stdout, original file is not changed
  -b, --backup-original
                        backup original config file as filename.conf~

formatting options:
  -i INDENT, --indent INDENT
                        specify number of spaces for indentation

Using as library

Main logic is within Formatter class, which can be used in 3rd-party code.

import nginxfmt

# initializing with standard FormatterOptions
f = nginxfmt.Formatter()

# format from string
formatted_text = f.format_string(unformatted_text)

# format file and save result to the same file
f.format_file(unformatted_file_path)

# format file and save result to the same file, original unformatted content is backed up
f.format_file(unformatted_file_path, backup_path)

Customizing formatting options:

import nginxfmt

fo = nginxfmt.FormatterOptions()
fo.indentation = 2  # 2 spaces instead of default 4

# initializing with standard FormatterOptions
f = nginxfmt.Formatter(fo)

Reporting bugs

Please create issue under https://github.com/slomkowski/nginx-config-formatter/issues. Be sure to add config snippets to reproduce the issue, preferably:

  • snippet do be formatted
  • actual result with invalid formatting
  • desired result

Credits

Copyright 2021 Michał Słomkowski. License: Apache 2.0. Previously published under https://github.com/1connect/nginx-config-formatter.