TextMate won't find files in project folder

This was working before, but now whenever I use TextMate to find matches across all files in my project folder, it says searched 0 files.

Has anyone had this happen to them and what did you do to fix it?

Yes, this has happened to me. I've been able to fix it in an number of ways.

Starting from the beginning;

[Edit -> Find -> Find in Project] or [Command + Shift + F] is how you open the Find window with your project preselected.

This should produce a window similar to this;

Some important fields;

• "In: " is set to your project folder.
• "Regular Expression" is unchecked.
• "Matching" is set to *. This will search every file

Any of these could cause unexpectedly empty searches.

However, this is pretty much day to day stuff, so once you've checked this there's a few more things to look at.

TextMate will look in a few places for Find Window includes and excludes, so check in ~/.tm_properties and [Your Project]/.tm_properties for these excludes;

• exclude
• excludeFiles
• excludeDirectories
• excludeInBrowser
• excludeInFolderSearch
• excludeInFileChooser
• excludeFilesInBrowser
• excludeDirectoriesInBrowser

From dvessel's tm_properties documentation

These are all globs and perhaps a bit arcane. (Note that the glob syntax is documented in the built-in help system.)

The file browser, if it has a file, checks that file against the first key with a value in this order: excludeFilesInBrowser, excludeInBrowser, excludeFiles, exclude. If neither match, it then does the same with include keys, and if one match, it is included.

The default include key is * (so no hidden files, although see the default .tm_properties which include .htaccess and .tm_properties). The default exclude key is the empty string (nothing matches).

The defaults for .tm_properties files are located here: TextMate.app/Contents/Resources/Default.tmProperties

If worse comes to worse, you can reset TextMate to its defaults following this Stack thread