Feature request: possibility to work completely offline

[alejandroclaro]

I have a project where the build must be performed completely offline and only audited components can be used during the build. We have been developing some native NodeJS modules, and we are trying to use CMake instead of node-gyp. However, looks like that if "cmake-js compile" is executed during the "install" script, it always tries to download the runtime instead of looking for common places where it could be already located.

It should be possible to control the dependencies that cmake-js is using without unexpected surprises.

[milahu]

offline build is also needed for nixos

cmake-js/lib/dist.js

Lines 102 to 106 in 18f4cbe

	Dist.prototype.ensureDownloaded = async function () {
	if (!this.downloaded) {
	await this.download();
	}
	};

the files in dist.downloaded (deps/v8/include/v8.h ...) are part of the nodejs source at https://github.com/nodejs/node (version must match the node binary, of course)

so the hardest part is getting the dist.internalPath

new (require('cmake-js')).Dist().internalPath == "/home/user/.cmake-js/node-x64/v16.8.0"

[alejandroclaro]

Why not considered the definition of npm_config_nodedir variable that is use in other build systems like node-gyp and electron-gyp?

They allow the definition of this variable thought npm config set and use the path instead or trying to download the runtime headers if this is defined.

[unbornchikken]

Ty for #260

Can you confirm that it solves your issue there?

[alejandroclaro]

It solves the issue.