13 releases (stable)

Uses new Rust 2024

new 1.6.1	Mar 14, 2026
1.5.0	Mar 10, 2026
1.4.3	Feb 25, 2026
0.10.0	Feb 11, 2026
0.8.0	Feb 8, 2026

#606 in Value formatting

Used in 3 crates

Apache-2.0

130KB
3K SLoC

sr-core

Pure domain logic for sr — a single-binary semantic release tool.

Overview

sr-core provides the traits, types, and functions that power semantic versioning releases. It contains no I/O — all git operations, VCS provider calls, and shell execution are abstracted behind traits so that consumers can supply their own implementations.

Traits

Trait	Purpose
`GitRepository`	Tag discovery, commit listing, tag/push operations
`VcsProvider`	Remote release creation/update, asset uploads, verification
`CommitParser`	Parse raw commits into conventional commits
`CommitClassifier`	Map commit types to bump levels and changelog sections
`ChangelogFormatter`	Render changelog entries to text
`ReleaseStrategy`	Orchestrate plan + execute

Key Types

Type	Description
`ReleaseConfig`	Full configuration (branches, tag prefix, version files, etc.)
`ReleasePlan`	The computed next release (current version, next version, bump level, commits)
`ConventionalCommit`	A parsed conventional commit (type, scope, description, breaking flag)
`BumpLevel`	`Patch`, `Minor`, or `Major`
`ChangelogEntry`	A single version's changelog data (version, date, commits, compare URL)
`ReleaseError`	Unified error type for all release operations
`TrunkReleaseStrategy`	Default `ReleaseStrategy` implementation wiring all traits together

Key Functions

Function	Description
`determine_bump(commits, classifier)`	Compute the highest bump level from a set of conventional commits
`apply_bump(version, bump)`	Apply a bump level to a semver `Version`, returning the new version
`bump_version_file(path, new_version)`	Update the version field in `Cargo.toml`, `package.json`, or `pyproject.toml`

Usage

Add sr-core to your Cargo.toml:

[dependencies]
sr-core = "0.1"

Building a custom release strategy

use sr_core::config::ReleaseConfig;
use sr_core::release::TrunkReleaseStrategy;
use sr_core::commit::{DefaultCommitParser, DefaultCommitClassifier};
use sr_core::changelog::DefaultChangelogFormatter;
use sr_core::release::ReleaseStrategy;

// Load configuration
let config = ReleaseConfig::load(Path::new(".urmzd.sr.yml")).unwrap();

// Build the strategy with your own GitRepository and VcsProvider implementations
let strategy = TrunkReleaseStrategy {
    git: my_git_impl,
    vcs: Some(my_vcs_provider),
    parser: DefaultCommitParser,
    formatter: DefaultChangelogFormatter::new(
        config.changelog.template.clone(),
        config.types.clone(),
        config.breaking_section.clone(),
        config.misc_section.clone(),
    ),
    config: config.clone(),
    force: false,
};

// Plan the release
let plan = strategy.plan()?;

// Execute (or dry-run)
strategy.execute(&plan, /* dry_run */ false)?;

Computing a version bump

use sr_core::version::{determine_bump, apply_bump};
use sr_core::commit::DefaultCommitClassifier;
use semver::Version;

let classifier = DefaultCommitClassifier::default();
if let Some(bump) = determine_bump(&commits, &classifier) {
    let current = Version::new(1, 2, 3);
    let next = apply_bump(&current, bump);
    println!("{current} -> {next}"); // e.g. 1.2.3 -> 1.3.0
}

License

Apache-2.0

Dependencies

~5.5–8MB
~162K SLoC