changesette 2.0.0

A version and changelog manager for single-package applications, using the changesets file format
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use std::{fs, path::Path};

use anyhow::{Context, Result};

const README: &str = "# Changesets

This directory holds changeset files recording pending changes to this package,
managed by [changesette](https://github.com/iorate/changesette).
`changesette add` creates a changeset here; `changesette version` consumes all
pending changesets to bump the version and update CHANGELOG.md.
";

/// Creates the `.changeset/` directory with a README.md describing it, and
/// does nothing if the directory already exists.
pub(crate) fn run() -> Result<()> {
    let changeset_dir = Path::new(".changeset");
    if changeset_dir.is_dir() {
        return Ok(());
    }
    fs::create_dir(changeset_dir).with_context(|| changeset_dir.display().to_string())?;
    let readme_path = changeset_dir.join("README.md");
    fs::write(&readme_path, README).with_context(|| readme_path.display().to_string())?;
    Ok(())
}