cargo-version-info

A Cargo subcommand for unified version management across CI/CD, Rust code, and shell scripts.

Overview

cargo-version-info provides a single source of truth for version operations, replacing scattered version logic in GitHub Actions workflows, bash scripts, Makefiles, and Rust build scripts.

Installation

Using cargo-binstall (Recommended)

The fastest way to install pre-built binaries:

cargo install cargo-binstall
cargo binstall cargo-version-info

Using cargo install

Build from source (slower, requires Rust toolchain):

cargo install cargo-version-info

Commands

cargo version-info next

Calculate the next patch version from the latest GitHub release.

# Basic usage (auto-detects repo from git remote)
cargo version-info next

# Specify repository explicitly
cargo version-info next --owner dataroad --repo dr-rs-ekg

# Output as tag format
cargo version-info next --format tag

# Output as JSON
cargo version-info next --format json

Output formats:

• version (default): Just the version number (e.g., 0.0.6)
• tag: Version with v prefix (e.g., v0.0.6)
• json: JSON object with latest, next, and next_tag fields

cargo version-info current

Get the current version from Cargo.toml.

# Read from default Cargo.toml
cargo version-info current

# Specify custom manifest path
cargo version-info current --manifest ./crates/my-crate/Cargo.toml

# Output as JSON
cargo version-info current --format json

Output formats:

• version (default): Just the version number
• json: JSON object with version field

cargo version-info latest

Get the latest published GitHub release version.

# Auto-detect repository
cargo version-info latest

# Specify repository
cargo version-info latest --owner dataroad --repo dr-rs-ekg

# Output as tag format
cargo version-info latest --format tag

Output formats:

• version (default): Just the version number
• tag: Version with v prefix
• json: JSON object with version and tag fields

cargo version-info dev

Generate a dev version from the current git SHA.

# Use current directory
cargo version-info dev

# Specify repository path
cargo version-info dev --repo-path ./some/path

# Output as JSON
cargo version-info dev --format json

Output format: 0.0.0-dev-<short-sha> (e.g., 0.0.0-dev-a1b2c3d)

cargo version-info tag

Generate a tag name from a version string.

# Generate tag from version
cargo version-info tag 0.1.2

# Output as JSON
cargo version-info tag 0.1.2 --format json

Output: v0.1.2

cargo version-info compare

Compare two versions.

# Compare versions (outputs true if version1 > version2)
cargo version-info compare 0.1.2 0.1.3

# Output as JSON
cargo version-info compare 0.1.2 0.1.3 --format json

# Output as diff format
cargo version-info compare 0.1.2 0.1.3 --format diff

Output formats:

• bool (default): true if version1 > version2, false otherwise
• json: JSON object with comparison result
• diff: Human-readable comparison (e.g., 0.1.2 < 0.1.3)

Environment Variables

• GITHUB_TOKEN: GitHub personal access token for API access (optional, falls back to gh CLI)
• GITHUB_REPOSITORY: Repository in owner/repo format (auto-detected from git remote if not set)

Use Cases

GitHub Actions

Replace bash scripts in GitHub Actions workflows:

- name: Calculate next version
  run: |
    NEXT_VERSION=$(cargo version-info next --format version)
    echo "version=$NEXT_VERSION" >> $GITHUB_OUTPUT

Bash Scripts

Replace version extraction logic:

# Instead of: VERSION=$(grep '^version' Cargo.toml | ...)
VERSION=$(cargo version-info current --format version)

# Instead of: gh release list ... | jq ...
LATEST=$(cargo version-info latest --format version)

Makefiles

Use in Make targets:

VERSION := $(shell cargo version-info current --format version)
NEXT_VERSION := $(shell cargo version-info next --format version)

Rust Build Scripts

Can be called from build.rs:

# fn main() -> Result<(), Box<dyn std::error::Error>> {
let output = std::process::Command::new("cargo")
    .args(["version-info", "current", "--format", "version"])
    .output()?;
let version = String::from_utf8(output.stdout)?;
# Ok(())
# }

Integration with Existing Workflows

This tool is designed to replace:

1. GitHub Actions: .github/actions/calculate-next-version/action.yml and .github/actions/get-version/action.yml
2. Bash scripts: Version extraction in .bash/*.sh files
3. Rust build scripts: Version resolution in crates/ekg-util-env/build.rs (can call this tool)

License

Same as the workspace (see root LICENSE file).