TextMate 2 bundle: Strips trailing whitespace from current document when saving. Works nicely with my Save On Focus Lost bundle.

• If you need whitespace highlighting, check Mads Hartmann's superb Whitespace bundle.
• If you happen to need new lines at EOF, then check Mike Szyndel's Ensure New Line at the EOF bundle, which is based on mine.

• Clone the git repo to ~/Library/Application Support/Avian/Bundles/Strip-Whitespace-On-Save.tmbundle
• Relaunch TextMate 2

Customizing the bundle is easy.

Suppose you want to avoid stripping white space on some specific files (like CSV and YAML). Just add the following to your .tm_properties file:

[*.csv]
scopeAttributes = attr.keep-whitespace

[*.yml]
scopeAttributes = attr.keep-whitespace

If you wanted to preserve whitespace for that messed-up whitespace project of yours, just drop this in its .tm_properties file:

scopeAttributes = attr.keep-whitespace

Of course, you can combine those two approaches for complete control over whitespace-stripping!

If you want to know which scope corresponds to each language, just hit ^⇧P (Show Scope) on a document of that type, and you'll get a nice tooltip with the scope namespaces that apply at the current cursor's position.

If you can't (or don't want to) use .tm_properties files, just open the Bundle Editor (Bundles menu ▶︎ Edit Bundles... or pressing ^⌥⌘B) and add -text.tabular.csv in the command's Scope Selector field:

• To exclude multiple file types, just add (space)-scope.namespace. For example, to exclude CSV and YAML, write: -text.tabular.csv -source.yaml.
• To work only on specific file types, use the namespace only, without the minus sign (e.g., to strip only CSV files, write text.tabular.csv).
• To include multiple file types, just add them separated by comma (i.e: text.tabular.csv, source.yaml, text.html.markdown).

You need to be using at least TextMate version 2.0.0-alpha.9317.

To get the most recent nightly build, open Preferences ▶︎ Software Update and ⌥-click the "Check Now" button . This will grab the latest version, rather than the one you get by just clicking the button.

Enjoy!