Version ranges for node package dependencies

I've lifted this from npmjs.org, but here at least I'll find it again.

version Must match version exactly

>version Must be greater than version

>=version etc

<version

<=version

~version "Approximately equivalent to version"

^version "Compatible with version"

1.2.x 1.2.0, 1.2.1, etc., but not 1.3.0

http://... See 'URLs as Dependencies' below

* Matches any version

"" (just an empty string) Same as *

version1 - version2 Same as >=version1 <=version2.

range1 || range2 Passes if either range1 or range2 are satisfied.

git... See 'Git URLs as Dependencies' below

user/repo See 'GitHub URLs' below

tag A specific version tagged and published as tag path/path/path See Local Paths below

For example, these are all valid:

{ "dependencies" :
    { "foo" : "1.0.0 - 2.9999.9999"
    , "bar" : ">=1.0.2 <2.1.2"
    , "baz" : ">1.0.2 <=2.3.4"
    , "boo" : "2.0.1"
    , "qux" : "<1.0.0 || >=2.3.1 <2.4.5 || >=2.5.2 <3.0.0"
    , "asd" : "http://asdf.com/asdf.tar.gz"
    , "til" : "~1.2"
    , "elf" : "~1.2.3"
    , "two" : "2.x"
    , "thr" : "3.3.x"
    , "lat" : "latest"
    , "dyl" : "file:../dyl"
    }
}

Git urls can be of the form:

git://github.com/user/project.git#commit-ish
git+ssh://user@hostname:project.git#commit-ish
git+ssh://user@hostname/project.git#commit-ish
git+http://user@hostname/project/blah.git#commit-ish
git+https://user@hostname/project/blah.git#commit-ish

Read more: https://www.npmjs.org/doc/files/package.json.html