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use std::path::Path;
use anyhow::Result;
use crate::util::hg::HgUtil;
use super::VcsDownloader;
/// Mercurial downloader using clone/pull/update.
pub struct HgDownloader {
hg_util: HgUtil,
}
impl HgDownloader {
pub fn new(hg_util: HgUtil) -> Self {
Self { hg_util }
}
}
impl VcsDownloader for HgDownloader {
fn download(&self, _url: &str, _reference: &str, _target: &Path) -> Result<()> {
Ok(())
}
fn install(&self, url: &str, reference: &str, target: &Path) -> Result<()> {
let target_str = target.to_string_lossy().to_string();
self.hg_util
.execute(&["clone", "--", url, &target_str], None)?;
self.hg_util
.execute(&["update", "-r", reference], Some(target))?;
Ok(())
}
fn update(&self, url: &str, _old_ref: &str, new_ref: &str, target: &Path) -> Result<()> {
self.hg_util.execute(&["pull", url], Some(target))?;
self.hg_util
.execute(&["update", "-r", new_ref], Some(target))?;
Ok(())
}
fn remove(&self, target: &Path) -> Result<()> {
if target.exists() {
std::fs::remove_dir_all(target)?;
}
Ok(())
}
fn local_changes(&self, target: &Path) -> Result<Option<String>> {
if !target.join(".hg").is_dir() {
return Ok(None);
}
let output = self.hg_util.execute(&["st"], Some(target))?;
let trimmed = output.stdout.trim();
if trimmed.is_empty() {
Ok(None)
} else {
Ok(Some(trimmed.to_string()))
}
}
fn commit_logs(&self, from: &str, to: &str, target: &Path) -> Result<String> {
let range = format!("{from}:{to}");
let output = self.hg_util.execute(
&[
"log",
"-r",
&range,
"--template",
"{rev}:{node|short} {desc|firstline}\\n",
],
Some(target),
)?;
Ok(output.stdout)
}
}
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