Node Git Tags

Gets and parses semver tags using Git and Node.js

Usage

Assuming you have the following git tags:

• v1.0.1
• v1.0.0
• v0.1.0-beta
• NonSemverTag

Get all semver tags

gittags.get([repo], callback(err, tags))

Argument	Type	Description
repo (optional)	string	Optional repo path. Defaults to process.cwd()
callback	function	Required callback fn
callback(err)	null | Error	Error, if there is one
callback(tags)	Array.<string>	Array of semver tags found (e.g. ['1.0.1', '1.0.0'])

var gittags = require('git-tags');

gittags.get(function(err, tags) {
  if (err) throw err;

  console.log(tags);
  // ['1.0.1', '1.0.0', '0.1.0-beta']
});

// Also takes a repo location:
gittags.get('/foorepo', function(err, tags) {});

Latest

gittags.latest([repo], callback(err, latest))

Name	Type	Description
repo (optional)	string	Optional repo path. Defaults to process.cwd()
callback	function	Required callback
err	null | Error	Error if, there is one
latest	string	Latest semver tag found (e.g. '1.0.1')

gittags.latest(function(err, latest) {
  console.log(latest);
  // '1.0.1'
});

Oldest

gittags.oldest([repo], callback(err, oldest))

Same as latest but opposite.

gittags.oldest(function(err, oldest) {
  console.log(oldest);
  // '0.1.0-beta'
});

Semver Parse

Two functions relating to semver exist for convenience. parse is just semver.parse, and mmp which stands for "Major, Minor, Patch". If you need more semver stuff, you should use the node-semver module directly.

gittags.parse(tag) -> SemVer

Name	Type	Description
tag	string	Version string to parse (e.g. 'v1.0.2-beta'). See node-semver for more info.

gittags.mmp(tag) -> formattedTag

Name	Type	Description
tag	string	Tag to format (e.g. 'v1.0.2-beta')
formattedTag	string	Major.Minor.Patch formatted tag (e.g. '1.0.2')

gittags.mmp('v1.3.10-beta.12');
// => '1.3.10'

var version = gittags.parse('v1.3.10-beta.12');
// <SemVer "1.3.10-beta.12">
version.prerelease;
// ['beta', 12]
version.compare('v1.3.10');
// -1
version.compare('v1.3.9');
// 1
// etc...

Note Stating the obvious, this module uses the callback fashion of async handling. This makes them easy to integrate w/ promises.

Bluebird, for example

var Q = require('bluebird');
var gittags = Q.promisifyAll(require('git-tags'));

gittags.latestAsync().then(console.log);
// 1.0.1

I originally intended this to use child_process.spawn and return a stream, but I then realized these are blocking in Linux/Unix, limiting the usefulness of that. And it's Git tags so who cares?

If you want streams, you can use something like highland.js which is awesome, BTW.

License

MIT