codemod

Interactive regex replace in directory

$ codemod -m -d [directory] '[old_pattern]' '[new_pattern]'

$ codemod --extensions [php,html] '[pattern]' '[replacement]'

$ codemod -m -d [directory] '[pattern]'

$ codemod --accept-all '[pattern]' '[replacement]'

$ codemod --count '[pattern]' [directory]

codemod [options] pattern [replacement] [path]

codemod assists with large-scale codebase refactors that require human oversight. For each regex match, it shows a colored diff and prompts whether to accept, reject, or edit the change.
Developed by Facebook and released as open source.

-m

Show more context around matches

Start searching from directory

Only process files with these extensions

Accept all changes without prompting

Just count matches, don't modify

Editor to use for manual edits

Exclude paths matching pattern

Process files without extensions

y - Accept change
n - Reject change
e - Edit in $EDITOR
q - Quit
a - Accept all remaining

jscodeshift

JavaScript/TypeScript AST-based codemod toolkit

Fast Rust-based alternative by Facebook

Uses Python regex syntax. Complex transformations may require scripting via Python API. Archived project; consider fastmod or jscodeshift for new projects.

sed(1), perl(1), fastmod(1)