Usage:
  semver bump (major|minor|patch|release|prerel [<prerel>]|build <build>) <version>
  semver compare <version> <other_version>
  semver diff <version> <other_version>
  semver get (major|minor|patch|release|prerel|build) <version>
  semver --help
  semver --version

Arguments:
  <version>  A version must match the following regular expression:
             "^[vV]?(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)(\-(0|[1-9][0-9]*|[0-9]*[A-Za-z-][0-9A-Za-z-]*)(\.(0|[1-9][0-9]*|[0-9]*[A-Za-z-][0-9A-Za-z-]*))*)?(\+[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$"
             In English:
             -- The version must match X.Y.Z[-PRERELEASE][+BUILD]
                where X, Y and Z are non-negative integers.
             -- PRERELEASE is a dot separated sequence of non-negative integers and/or
                identifiers composed of alphanumeric characters and hyphens (with
                at least one non-digit). Numeric identifiers must not have leading
                zeros. A hyphen ("-") introduces this optional part.
             -- BUILD is a dot separated sequence of identifiers composed of alphanumeric
                characters and hyphens. A plus ("+") introduces this optional part.

  <other_version>  See <version> definition.

  <prerel>  A string as defined by PRERELEASE above. Or, it can be a PRERELEASE
            prototype string (or empty) followed by a dot.

  <build>   A string as defined by BUILD above.

Options:
  -v, --version          Print the version of this tool.
  -h, --help             Print this help message.

Commands:
  bump     Bump by one of major, minor, patch; zeroing or removing
           subsequent parts. "bump prerel" sets the PRERELEASE part and
           removes any BUILD part. A trailing dot in the <prerel> argument
           introduces an incrementing numeric field which is added or
           bumped. If no <prerel> argument is provided, an incrementing numeric
           field is introduced/bumped. "bump build" sets the BUILD part.
           "bump release" removes any PRERELEASE or BUILD parts.
           The bumped version is written to stdout.

  compare  Compare <version> with <other_version>, output to stdout the
           following values: -1 if <other_version> is newer, 0 if equal, 1 if
           older. The BUILD part is not used in comparisons.

  diff     Compare <version> with <other_version>, output to stdout the
           difference between two versions by the release type (MAJOR, MINOR,
           PATCH, PRERELEASE, BUILD).

  get      Extract given part of <version>, where part is one of major, minor,
           patch, prerel, build, or release.

See also:
  https://semver.org -- Semantic Versioning 2.0.0

$ semver bump patch 0.1.0
0.1.1
$ semver bump minor 0.1.1
0.2.0
$ semver bump patch 0.2.0
0.2.1
$ semver bump major 0.2.1
1.0.0
$ semver bump patch 1.0.0
1.0.1
$ semver bump prerel rc.1 1.0.1
1.0.1-rc.1
$ semver bump prerel rc.. 1.2.0-beta2
1.2.0-rc.1
$ semver bump prerel 1.0.1-rc.1+build4423
1.0.1-rc.2
$ semver bump prerel beta. 1.1.0-beta2
1.1.0-beta3
$ semver bump build build.051 1.0.1-rc1.1.0
1.0.1-rc1.1.0+build.051
$ semver bump release v0.1.0-SNAPSHOT
0.1.0

$ semver compare 1.0.1-rc1.1.0+build.051 1.0.1
-1
$ semver compare v1.0.1-rc1.1.0+build.051 V1.0.1-rc1.1.0
0
$ semver compare 1.0.1-rc1.1.0+build.051 1.0.1-rc1.1.0+build.052
0
$ semver compare 1.0.1-rc1.1.0+build.051 1.0.1-rb1.1.0
1
$ semver compare 10.1.4-rc4 10.4.2-rc1
-1
$ semver compare 10.1.4-rc4 10.4.2-1234
-1

$ semver diff 1.0.1-rc1.1.0+build.051 1.0.1
prerelease
$ semver diff 10.1.4 10.1.4

$ semver diff 10.1.4-rc4 10.4.2-rc1
minor

$ semver get patch 1.2.3
3
$ semver get minor 1.2.3
2
$ semver get major 1.2.3
1
$ semver get prerel 1.2.3-rc.4
rc.4
$ semver get prerel 1.2.3-alpha.4.5
alpha.4.5
$ semver get build 1.2.3-rc.4+build.567
build.567
$ semver get release 1.2.3-rc.4+build.567
1.2.3
$ semver get prerel 1.2.3+build.568

$ semver get prerel 1.2.3-rc.4+build.569
rc.4
$ semver get prerel 1.2.3-rc-4+build.570
rc-4