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yarn.rs
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yarn.rs
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use std::{fs::File, process::Command};
use anyhow::{anyhow, Context, Result};
use node_semver::{Range, Version};
use serde::Deserialize;
use turbopath::{AbsoluteSystemPathBuf, RelativeSystemPathBuf};
use crate::package_manager::PackageManager;
#[derive(Debug, Deserialize)]
struct YarnRC {
#[serde(rename = "nodeLinker")]
node_linker: Option<String>,
}
pub const LOCKFILE: &str = "yarn.lock";
pub const YARN_RC: &str = ".yarnrc.yml";
pub struct YarnDetector<'a> {
repo_root: &'a AbsoluteSystemPathBuf,
// For testing purposes
version_override: Option<Version>,
found: bool,
}
impl<'a> YarnDetector<'a> {
pub fn new(repo_root: &'a AbsoluteSystemPathBuf) -> Self {
Self {
repo_root,
version_override: None,
found: false,
}
}
#[cfg(test)]
fn set_version_override(&mut self, version: Version) {
self.version_override = Some(version);
}
fn get_yarn_version(&self) -> Result<Version> {
if let Some(version) = &self.version_override {
return Ok(version.clone());
}
let output = Command::new("yarn")
.arg("--version")
.current_dir(&self.repo_root)
.output()?;
let yarn_version_output = String::from_utf8(output.stdout)?;
Ok(yarn_version_output.trim().parse()?)
}
fn is_nm_linker(repo_root: &AbsoluteSystemPathBuf) -> Result<bool> {
let yarnrc_path = repo_root.join_relative(RelativeSystemPathBuf::new(YARN_RC)?);
let yarnrc = File::open(yarnrc_path)?;
let yarnrc: YarnRC = serde_yaml::from_reader(&yarnrc)?;
Ok(yarnrc.node_linker == Some("node-modules".to_string()))
}
pub fn detect_berry_or_yarn(
repo_root: &AbsoluteSystemPathBuf,
version: &Version,
) -> Result<PackageManager> {
let berry_constraint: Range = ">=2.0.0-0".parse()?;
if berry_constraint.satisfies(version) {
let is_nm_linker = Self::is_nm_linker(repo_root)
.context("could not determine if yarn is using `nodeLinker: node-modules`")?;
if !is_nm_linker {
return Err(anyhow!(
"only yarn v2/v3 with `nodeLinker: node-modules` is supported at this time"
));
}
Ok(PackageManager::Berry)
} else {
Ok(PackageManager::Yarn)
}
}
}
impl<'a> Iterator for YarnDetector<'a> {
type Item = Result<PackageManager>;
fn next(&mut self) -> Option<Self::Item> {
if self.found {
return None;
}
self.found = true;
let yarn_lockfile = self
.repo_root
.join_relative(RelativeSystemPathBuf::new(LOCKFILE).unwrap());
if yarn_lockfile.exists() {
Some(
self.get_yarn_version()
.and_then(|version| Self::detect_berry_or_yarn(self.repo_root, &version)),
)
} else {
None
}
}
}
#[cfg(test)]
mod tests {
use std::{fs, fs::File};
use anyhow::Result;
use tempfile::tempdir;
use turbopath::AbsoluteSystemPathBuf;
use super::LOCKFILE;
use crate::{
commands::CommandBase,
get_version,
package_manager::{
yarn::{YarnDetector, YARN_RC},
PackageManager,
},
Args,
};
#[test]
fn test_detect_yarn() -> Result<()> {
let repo_root = tempdir()?;
let base = CommandBase::new(
Args::default(),
repo_root.path().to_path_buf(),
get_version(),
)?;
let yarn_lock_path = repo_root.path().join(LOCKFILE);
File::create(&yarn_lock_path)?;
let yarn_rc_path = repo_root.path().join(YARN_RC);
fs::write(&yarn_rc_path, "nodeLinker: node-modules")?;
let absolute_repo_root = AbsoluteSystemPathBuf::new(base.repo_root)?;
let mut detector = YarnDetector::new(&absolute_repo_root);
detector.set_version_override("1.22.10".parse()?);
let package_manager = detector.next().unwrap()?;
assert_eq!(package_manager, PackageManager::Yarn);
let mut detector = YarnDetector::new(&absolute_repo_root);
detector.set_version_override("2.22.10".parse()?);
let package_manager = detector.next().unwrap()?;
assert_eq!(package_manager, PackageManager::Berry);
Ok(())
}
}