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('gittags'));

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