sed

Embrace and extend GNU sed, the stream editor for filtering and transforming text.

Stability: Alpha preview

• Some parts seem to somewhat work already.
• The transform part is currently hard-coded to the equivalent of sed -re 's~^~>> ~;s~$~ <<~;$a done.'
• Uploading to npm anyway in order to announce the new repository.

CLI

See docs/cli/.

API

This module ESM-exports an object with these methods:

.cliMain(args)

Interpret the CLI arguments given in array args. Returns a promise for completion.

• ⚠ While I try to keep the script syntax mostly compatible with GNU sed, the CLI arguments are very different. If you need a tool with same CLI arguments as the original GNU sed, please use GNU sed.

.transform(state[, input])

Transform text according to state, which should be an object with a property parseTree, whose value should be the result of .parse-ing a sed script.

If input is…

• null or undefined (e.g. not given), return a transform stream that you can pipe your text into.
• a string, return a promise for the transformed stream.
• a buffer, it will be converted to a string using node's default encoding, then processed as if that string was given.

In addition to the mandatory parseTree property, state may contain any of these optional properties:

• prFs: An object with an interface similar to the Node.js fs Promises API. Providing it will enable script commands that need file system access.

.parse(script[, grow])

Parse sed commands from string script. Returns a promise for an opaque truthy value that represents the resulting parse tree. The only purpose of exposing the parse tree is so that you can reuse it for multiple invocations of .transform, so avoid relying on its internal structure in any way.

If grow is provided, it is expected to be an existing parse tree, and that one will be extended in-place rather than creating a new one.

Known issues

• Needs more/better tests and docs.

License

ISC