alt

Find alternate file

$ alt [path/to/file.rb]

$ alt -d [app/] [test/models/user_test.rb]

$ alt -e [.spec.ts] [src/component.ts]

alt [-d directory] [-e extension] file

alt finds the "alternate file" for a given source file, typically switching between implementation and test files. It uses intelligent pattern matching to find related files based on common naming conventions.
For example, given app/models/user.rb, it would find test/models/user_test.rb or spec/models/user_spec.rb. This makes it easy to jump between code and tests in editor integrations.

-d directory

Limit search to specific directory

Specify alternate file extension

Display version information

Pattern matching relies on common conventions; unusual project structures may not work. Results depend on files actually existing in expected locations.

alt was created as a fast alternative to similar tools in vim and other editors, designed to work independently of any specific editor and integrate via shell commands.

find(1), fd(1), fzf(1)