post-build.js should be moved into gatsby-node.js

[KyleAMathews]

Keep things simple. All node APIs in gatsby-node and all browser APIs in gatsby-browser.

[LukeSheard]

This seems simple enough, I'd be happy to give this a go. Would you want to keep the existing lib/utils/post-build.js or move it in to lib/isomorphic/gatsby-node.js?

[KyleAMathews]

Sorry this issue wasn't super clear. Right now if you add a post-build.js file into the root of your site, Gatsby will try to require that and call its function after all building is finished. See

gatsby/lib/utils/build.js

Line 13 in 45ed32d

customPostBuild = require(`${directory}/post-build`)

So the work to be done here is to move this API to gatsby-node.js so if you want to do some work after the site is built, you'd export a function in gatsby-node.js like export.postBuild = (pages, cb) => // do some work.

Make sense?

Thanks!