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path: root/xtask/src/release.rs
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use std::process::{Command, Stdio};

use anyhow::Result;
use clap::{Args, Subcommand};
use semver::Version;

use crate::PKG_VER;

use self::bump::{Bump, Level};

mod bump;

#[derive(Debug, Clone, Args)]
pub struct Release {
    #[command(subcommand)]
    step: Option<Step>,

    /// Level of version bump version.
    #[arg(global = true, required = false)]
    level: bump::Level,

    /// Options passed to git commit.
    #[arg(global = true, last = true)]
    git_commit_args: Vec<String>,
}

impl Release {
    pub fn run(self) -> Result<()> {
        match self.step {
            Some(step) => step.run(),
            None => {
                let bump = Step::bump(self.level)?;

                println!("Bumped version: {bump}");

                Ok(())
            }
        }
    }
}

#[derive(Debug, Clone, Subcommand)]
pub enum Step {
    /// Bump version in package files and commit changes.
    Bump {
        #[arg(from_global)]
        level: bump::Level,
    },

    /// Make a release commit.
    Commit {
        #[arg(from_global)]
        git_commit_args: Vec<String>,
    },

    /// Create git tag for release.
    Tag {
        #[arg(from_global)]
        level: bump::Level,
    },
}

impl Step {
    pub fn run(self) -> Result<()> {
        match self {
            Step::Bump { level } => {
                let bump = Self::bump(level)?;
                println!("Bumped version: {bump}");
            }
            Step::Commit { git_commit_args } => Self::commit(git_commit_args)?,
            Step::Tag { level } => {
                let stdout = Command::new("git")
                    .arg("describe")
                    .arg("--abbrev=0")
                    .output()?
                    .stdout;

                let prev = std::str::from_utf8(&stdout)?.parse()?;
                let next = level.bump(&prev);
                Self::tag(prev, next)?;
            }
        };

        Ok(())
    }

    pub fn bump(level: Level) -> Result<Bump> {
        let version = PKG_VER.parse().unwrap_or_else(|_| Version::new(0, 1, 0));
        let next = level.bump(&version);

        let mut bump = Bump { next, version };

        bump.bump_file("./Cargo.toml", bump::cargo)?;
        bump.bump_file("./README.md", bump::replace)?;
        bump.bump_file("./CHANGELOG.md", bump::changelog)?;
        bump.bump_file("./pkg/archlinux/projectr/PKGBUILD", bump::replace)?;
        bump.bump_file("./pkg/archlinux/projectr-bin/PKGBUILD", bump::replace)?;
        bump.bump_file("./pkg/archlinux/projectr-git/PKGBUILD", bump::vsc_pkgbuild)?;

        Ok(bump)
    }

    pub fn commit(git_commit_args: Vec<String>) -> Result<()> {
        let git_commit = Command::new("git")
            .arg("commit")
            .args(git_commit_args)
            .status()?;

        anyhow::ensure!(git_commit.success(), "Failed to commit changes");

        Ok(())
    }

    pub fn tag(from: Version, to: Version) -> Result<String> {
        let tag_name = format!("v{}", to);

        let shortlog_child = Command::new("git")
            .arg("shortlog")
            .arg(format!("v{}..HEAD", from))
            .arg("--abbrev=7")
            .stdout(Stdio::piped())
            .spawn()?;

        let git_commit = Command::new("git")
            .arg("tag")
            .arg("-s")
            .arg(&tag_name)
            .arg("--file")
            .arg("-")
            .stdin(Stdio::from(shortlog_child.stdout.unwrap())) // Pipe through.
            .status()?;

        anyhow::ensure!(git_commit.success(), "Failed to commit changes");

        Ok(tag_name)
    }
}