Remove dependency on npm

[Hirse]

Currently, ungit has a dependency on the whole npm package, which is only used to check latest versions on the npm registry.

This change replaces npm with more light-weight solutions to provide the same functionality.

[campersau]

Quick review:

• All resolved urls in the package lock now point to https://domoreexp.pkgs.visualstudio.com/_packaging/npm-mirror/npm/registry instead of https://registry.npmjs.org
• I think pkg-versions can be a devDependency

Will look into it more during the weekend.

[Hirse]

Fixed both of those.
I had messed up my registry from work so it was pointing to a mirror.

[campersau]

The build is currently failing because npm was previously required in sysinfo.js which did load graceful-fs which then replaced some fs functions and changed the behavior for having to specify callbacks.

We currently have a lot of fs calls for testing which don't specify a callback and maybe more:

ungit/source/git-api.js

Lines 699 to 720 in 621a04f

	app.post(`${exports.pathPrefix}/testing/createfile`, ensureAuthenticated, (req, res) => {
	const content = req.body.content ? req.body.content : (`test content\n${Math.random()}\n`);
	fs.writeFileSync(req.body.file, content);
	res.json({});
	});
	app.post(`${exports.pathPrefix}/testing/changefile`, ensureAuthenticated, (req, res) => {
	const content = req.body.content ? req.body.content : (`test content\n${Math.random()}\n`);
	fs.writeFileSync(req.body.file, content);
	res.json({});
	});
	app.post(`${exports.pathPrefix}/testing/createimagefile`, ensureAuthenticated, (req, res) => {
	fs.writeFile(req.body.file, 'png', { encoding: 'binary' });
	res.json({});
	});
	app.post(`${exports.pathPrefix}/testing/changeimagefile`, ensureAuthenticated, (req, res) => {
	fs.writeFile(req.body.file, 'png ~~', { encoding: 'binary' });
	res.json({});
	});
	app.post(`${exports.pathPrefix}/testing/removefile`, ensureAuthenticated, (req, res) => {
	fs.unlinkSync(req.body.file);
	res.json({});
	});

We could also change them to use their *Async versions instead because we promisify fs here

ungit/source/utils/fs-async.js

Line 4 in 621a04f

const fs = Bluebird.promisifyAll(require("fs"));

[campersau]

This will also reduce the electron package size by a few MB. (ungit-linux-x64.zip 98.9MB → 91.6MB in my environment.)

[campersau]

Nice catch!