CLI for packages-to-rebuild-on-changes
npm install @typescript-tools/packages-to-rebuild-on-changes-cli[![License][]](https://opensource.org/licenses/ISC)
[![NPM Package][]](https://npmjs.org/package/@typescript-tools/packages-to-rebuild-on-changes-cli)
[license]: https://img.shields.io/badge/License-ISC-blue.svg
[npm package]: https://img.shields.io/npm/v/@typescript-tools/packages-to-rebuild-on-changes-cli.svg
> Enumerate packages reachable from graph traversal given starting packages
``shell`
npm install --save-dev @typescript-tools/packages-to-rebuild-on-changes-cli
`
Usage:
packages-to-rebuild-on-changes [--root
Options:
packages Package names or paths to rebuild when listed packages change (also reads from stdin)
--root=
--path Print the relative path to each package from root
`
This packages offers a CLI to invoke [packages-to-rebuild-on-changes],
and calculates which packages in a monorepo need to be built and
tested given a changed set of packages.
The changed set of packages can be specified as arguments or from
stdin, as paths or by (scoped) package name.
The set of packages to rebuild is calculated as follows:
`
given set_of_changed_packages,
let downstream = internal_dependers(set_of_changed_packages)
let dependencies = internal_dependencies(downstream)
let packags_to_rebuild = set_of_changed_packages ∪ downstream ∪ dependencies
where ∪ is the [union] of two sets.
The set of downstream packages (internal dependers) is included to
ensure no changed packages has violated a contract that another
package is reliant upon.
The set of dependencies is required in order to build.
Note that the dependencies set need only be rebuilt and not re-tested.
[packages-to-rebuild-on-changes]: https://github.com/typescript-tools/typescript-tools/tree/master/packages/packages-to-rebuild-on-changes
[union]: https://en.wikipedia.org/wiki/Union_(set_theory)
Consider a monorepo with the following packages
`
A ---B --- C
\
-- D
Invoking packages-to-rebuild-on-changes with the following inputs
would yield this output
| input | output |
| ----- | --------------- |
| A | A B C D |B
| | A B C |D
| | A D` |