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Tailor. Static analyzer for Swift.

Tailor supports Swift 2 out of the box and helps enforce style guidelines outlined in the The Swift Programming Language, GitHub, Ray Wenderlich, Jamie Forrest, and Coursera style guides. It supports cross-platform usage and can be run on Windows and Linux.

Getting Started

Installation

Requires Java (JRE or JDK) Version 8 or above: Java SE Downloads

Mac OS X (10.10+), Linux (Ubuntu, etc.)

curl -fsSL http://tailor.sh/install.sh | sh

Windows (10+)

iex (new-object net.webclient).downloadstring('http://tailor.sh/install.ps1')

You may also download Tailor via GitHub Releases, then unzip, and symlink the tailor/bin/tailor shell script to a location in your $PATH.

Usage

Run Tailor with a list of files and directories to analyze, or via Xcode.

$ tailor [options] [--] [[file|directory] ...]

Help for Tailor is accessible via the [-h|--help] option.

$ tailor -h
Usage: tailor [options] [--] [[file|directory] ...]

Perform static analysis on Swift source files.

Invoking Tailor with at least one file or directory will analyze all Swift files at those paths. If
no paths are provided, Tailor will analyze all Swift files found in '$SRCROOT' (if defined), which
is set by Xcode when run in a Build Phase. Tailor may be set up as an Xcode Build Phase
automatically with the --xcode option.

Options:
    --debug                                    print ANTLR error messages when parsing error occurs
    --except=<rule1,rule2,...>                 run all rules except the specified ones
 -h,--help                                     display help
    --invert-color                             invert colorized console output
 -l,--max-line-length=<0-999>                  maximum Line length (in characters)
    --max-class-length=<0-999>                 maximum Class length (in lines)
    --max-closure-length=<0-999>               maximum Closure length (in lines)
    --max-file-length=<0-999>                  maximum File length (in lines)
    --max-function-length=<0-999>              maximum Function length (in lines)
    --max-name-length=<0-999>                  maximum Identifier name length (in characters)
    --max-severity=<error|warning (default)>   maximum severity
    --max-struct-length=<0-999>                maximum Struct length (in lines)
    --no-color                                 disable colorized console output
    --only=<rule1,rule2,...>                   run only the specified rules
    --show-rules                               show description for each rule
 -v,--version                                  display version
    --xcode=<path/to/project.xcodeproj>        add Tailor Build Phase Run Script to Xcode Project

Features

• Rules
• Cross-Platform
• Automatic Xcode Integration
• Colourized Output
• Warnings, Errors, and Failing the Build
• Disable Violations within Source Code

Cross-Platform

Tailor may be used on Mac OS X via your shell or integrated with Xcode, as well as on Windows and Linux. Great news for when the Swift compiler comes to Linux later this year!

Windows

Linux

Automatic Xcode Integration

Tailor can be integrated with Xcode projects using the --xcode option.

tailor --xcode /path/to/demo.xcodeproj/

This adds the following Build Phase Run Script to your project's default target.

Colourized Output

Tailor uses the following colour schemes to format CLI output:

• Dark theme (enabled by default)

* **Light theme** (enabled via `--invert-color` option) * **No colour theme** (enabled via `--no-color` option)

Warnings, Errors, and Failing the Build

--max-severity can be used to control the maximum severity of violation messages. It can be set to error or warning (by default, it is set to warning). Setting it to error allows you to distinguish between lower and higher priority messages. It also fails the build in Xcode, if any errors are reported (similar to how a compiler error fails the build in Xcode). With max-severity set to warning, all violation messages are warnings and the Xcode build will never fail.

This setting also affects Tailor's exit code on the command-line, a failing build will exit 1 whereas having warnings only will exit 0, allowing Tailor to be easily integrated into pre-commit hooks.

Disable Violations within Source Code

Violations on a specific line may be disabled with a trailing single-line comment.

import Foundation; // tailor:disable

Developers

Please review the guidelines for contributing to this repository.

Development Environment

• Java Version 8
• Gradle (optional, ./gradlew may be used instead)

External Tools and Libraries

Development & Runtime

Tool	License
ANTLR 4.5	The BSD License
Apache Commons CLI	Apache License, Version 2.0
Jansi	Apache License, Version 2.0
Xcodeproj	MIT
SnakeYAML	Apache License, Version 2.0

Development Only

Tool	License
Gradle	Apache License, Version 2.0
Travis CI	[Free for Open Source Projects] (https://travis-ci.com/plans)
Mockito	MIT
JUnit	Eclipse Public License 1.0
Java Hamcrest	The BSD 3-Clause License
FindBugs	GNU Lesser General Public License
Checkstyle	GNU Lesser General Public License
PMD	BSD-style
JaCoCo	Eclipse Public License v1.0
Codecov	Free for Open Source
Bundler	MIT

License

Tailor is released under the MIT license. See LICENSE.md for details.