nextver

A library for parsing and incrementing arbitrarily-formatted versions.

Instead of conforming to a specific versioning scheme, this library allows you to define your own version format, parse version strings against it, and increment versions according to semantic and/or calendar rules.

Also comes with a CLI.

This an abridged version of the documentation. For the full documentation, see docs.rs.

Example

Below, the text in < and > brackets is a specifier. See what they mean here.

Quickly get a next version:

use nextver::prelude::*;

let next = Sem::next_version_string(
  "<MAJOR>.<MINOR>.<PATCH>",  // format string
  "1.2.3",                    // current version string
  SemLevel::Minor             // the specifier to increment
)?;
assert_eq!(next, "1.3.0");

API Overview

nextver is built around three main concepts: Schemes, formats, and versions.

• Schemes dictate the kinds of values allowed in versions and the rules for incrementing them. (See the table below.) They are modeled by the Scheme trait and implemented by the the following structs:

  • [Sem]: A semantic versioning scheme. It is similar to SemVer.
  • CalSem: A calendar-semantic versioning scheme. It is similar to CalVer, but with an explicitly-required semantic part(s).
  • [Cal]: A calendar versioning scheme. Its like CalSem but without semantic specifiers. (This scheme is less useful in practice because there is no way to increment a version twice within the same period of its least significant specifier.)

• Formats define the structure of a version string. They are modeled by the Format struct. They contains a sequence of specifier and literal text tokens. For example, <MAJOR>.<MINOR>.<PATCH> is a format string that can be turned into a Format object.

• Versions are like Formats, but with actual values instead of specifiers. They represent a a point in a project's development. These are modeled by the Version struct. They can be incremented to new versions and compared amongst each other.

Format String Syntax

Use any sequence of specifiers (listed below) and literal text in a format string. Specifiers are bracketed with < and >.

Table

In the "Example" column below, we reference a major of 1, minor of 2, patch of 3 and a date of 2001-02-03 (which is in the 4th week).

Specifiers are case-sensitive. For example, <major> is not a valid specifier.

CLI

This crate provides a CLI that can be used to do some API functions straight from the command line.

Installation

cargo install nextver

Usage

nextver --help

DevOps

To:

• create and push a new git tag,
• create a new GitHub release with binaries attached, and
• publish a new version to https://crates.io (and update docs on https://docs.rs)

simply push a commit to the master branch with an updated version number in Cargo.toml. The workflow file at .github/workflows/release+build+publish.yml will take care of the rest. Make sure to pull afterwards.