cargo-hack 0.6.44

Cargo subcommand to provide various options useful for testing and continuous integration. 
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// SPDX-License-Identifier: Apache-2.0 OR MIT

use anyhow::{Result, bail, format_err};

use crate::{ProcessBuilder, version::Version};

pub(crate) fn version(mut cmd: ProcessBuilder<'_>) -> Result<Version> {
    // Use verbose version output because the packagers add extra strings to the normal version output.
    cmd.arg("-vV");
    let verbose_version = cmd.read()?;
    let release = verbose_version
        .lines()
        .find_map(|line| line.strip_prefix("release: "))
        .ok_or_else(|| format_err!("unexpected output from {cmd}: {verbose_version}"))?;
    let (version, _channel) = release.split_once('-').unwrap_or((release, ""));

    let version: Version = version.parse()?;
    if version.major != 1 || version.patch.is_none() {
        bail!("unexpected output from {cmd}: {verbose_version}");
    }

    Ok(version)
}