Reprinting file without changes line break changes

[sophiebits]

Parsing and reprinting

// I have a parent
newNode.parent
  && (
    (// Or I did but its different than the one I have now.
      !originalNode.parent ||
      newNode.parent.key !== originalNode.parent.key
    )
  )

outputs

// I have a parent
newNode.parent
  && (
    (// Or I did but its different than the one I have now.
      (!originalNode.parent || newNode.parent.key !== originalNode.parent.key)
    )
  )

which is inconvenient for codemods. Live test: http://felix-kling.de/esprima_ast_explorer/#/NvtYJQH95L.

[fkling]

All the printing is done by recast. You should file an issue there.

Though for jscodeshift specifically, you can simply return nothing from the transformer. That tells the runner/worker that the file is not supposed to change (and of course it won't be overridden since there was no return value).

[sophiebits]

Okay, thanks: benjamn/recast#215.