Note: This tool is still a work in progress.

swift-indent is a tool for automatically indenting your Swift files according to a set of rules. It is implemented as another driver kind, like swiftc, the batch compiler, so swift-indent is actually a symbolic link to swift. This tool uses libIDE to indent code, so it can be leveraged from multiple systems and editors.


To print all the available options:

 swift-indent -help

By default, swift-indent will output the indented file to the standard output:

 swift-indent sample.swift

You can either output the result to a separate file:

 swift-indent sample.swift -o result.swift

Or you can indent in-place (the original file will be overwritten):

 swift-indent -in-place sample.swift

If you want to indent using tabs instead of spaces, use the -use-tabs option:

 swift-indent -use-tabs sample.swift

You can set the number of tabs or spaces using the -tab-width and -indent-width options, respectively.

If you want to indent cases in switch statements, use the “-indent-switch-case” option. The result would be something like this:

switch aSwitch {
  case .some(let s):

swift-indent supports indenting a range of lines from a file:

 swift-indent -line-range 2:45 sample.swift

This will indent the file from lines 2 to 45, inclusive.

You can indent several files, but the -line-range option is not supported in that case.

You can also provide several line ranges by using multiple -line-range options:

 swift-indent -line-range 2:45 -line-range 100:120 sample.swift