A tool aimed to increase Swift code quality, by checking for conformance to code metrics.

Taylor uses SourceKitten to a more accurate AST representation and generates the final report in either Xcode, JSON, PMD or plain text formats.

You need to have Homebrew installed.

brew update
brew install taylor

Rebuild dependencies by running carthage bootstrap --platform Mac (Carthage required)
Clone the project and run make install (latest version of Xcode required).

Download the latest release and run:

Taylor.app/Contents/Resources/install

To get warnings displayed in the IDE add a new Run Script Phase with:

if which taylor >/dev/null; then
  taylor -p ${PROJECT_DIR} -r xcode
else
  echo "Taylor not installed"
fi

To use Taylor from command line run it as follows:

taylor [option1 [option1_argument]] [option2 option2_argument] […]

taylor alone with no arguments analyses .swift files inside current folder.

If you want to exclude some files or folders from checking create a new .yml file and call Taylor with -ef /path/to/file argument.
Default filename is excludes.yml and its default location is the folder specified by --path flag.
The following excluding name formats can be specified:

- "/path/to/file"
- "file"
- "Folder"
- "Folder/*"
- ".*Tests.*"

These are the code quality rules currently existing:

Number of lines in a class must not exceed given limit. Default limit = 400 lines.
Example: taylor -rc ExcessiveClassLength=100.

Number of lines in a method must not exceed given limit. Default limit = 20 lines.
Example: taylor -rc ExcessiveMethodLength=10.

Number of methods in a class must not exceed given limit. Default limit = 10 methods.
Example: taylor -rc TooManyMethods=7.

Cyclomatic Complexity number of a method must not exceed maximal admitted value. Default = 5.
Example: taylor -rc CyclomaticComplexity=10.

Block Depth of a method must not exceed maximal admitted value. Default = 3.
Example: taylor -rc NestedBlockDepth=7.

N-Path Complexity of a method must not exceed maximal admitted value. Default = 100.
Example: taylor -rc NPathComplexity=50.

Number of parameters given to a method must not exceed maximal admitted value. Default = 3.
Example: taylor -rc ExcessiveParameterList=5.

Thanks to JP Simard for developing SourceKitten.

MIT Licensed.