build: use pkgroll

.github/CONTRIBUTING.md

@@ -0,0 +1,61 @@
+
+# Contributing guide
+
+## Setting up the project
+
+Use nvm to set the appropriate Node.js version:
+```
+nvm i
+```
+
+Install the dependencies using pnpm:
+```
+pnpm i
+```
+
+## Producing a build
+Run the `build` script:
+```
+pnpm build
+```
+
+The package is bundled using [pkgroll](https://github.com/privatenumber/pkgroll) (Rollup). It infers the entry-points from `package.json` so there are no build configurations.
+
+
+### Watch mode
+During development, you can use the watch flag (`--watch, -w`) to automatically rebuild the package on file changes:
+```
+pnpm build -w
+```
+
+## Running the package locally
+Since pkgroll knows the entry-point is a binary (being in `package.json#bin`), it automatically adds the Node.js hashbang to the top of the file, and chmods it so it's executable.
+
+You can run the distribution file in any directory:
+```
+./dist/cli.mjs
+```
+
+Or in non UNIX environments, you can use Node.js to run the file:
+```
+node ./dist/cli.mjs
+```
+
+## Testing the package
+After commiting your changes, you can create a test release via GitHub using [`git-publish`](https://github.com/privatenumber/git-publish):
+
+```
+$ pnpm dlx git-publish
+✔ Successfully published branch! Install with command:
+  → npm i 'privatenumber/aicommits#npm/main'
+```
+
+You can test it out in any project like this:
+```
+pnpm dlx 'privatenumber/aicommits#npm/main'
+```
+
+Or using npx:
+```
+npx 'privatenumber/aicommits#npm/main'
+```