From 8cc1ba8a02c0318b65658f1634de378c780392b9 Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Sun, 10 May 2026 00:32:08 +0900
Subject: refactor(workspace): consolidate crates into mozart-core

Merged mozart-archiver, mozart-autoload, mozart-registry,
mozart-sat-resolver, and mozart-vcs into mozart-core to align
the source layout with Composer's structure.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 crates/mozart-core/src/vcs/downloader/hg.rs | 84 +++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 crates/mozart-core/src/vcs/downloader/hg.rs

(limited to 'crates/mozart-core/src/vcs/downloader/hg.rs')

diff --git a/crates/mozart-core/src/vcs/downloader/hg.rs b/crates/mozart-core/src/vcs/downloader/hg.rs
new file mode 100644
index 0000000..33650f8
--- /dev/null
+++ b/crates/mozart-core/src/vcs/downloader/hg.rs
@@ -0,0 +1,84 @@
+use super::super::util::hg::HgUtil;
+use super::VcsDownloader;
+use anyhow::Result;
+use std::path::Path;
+
+/// 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 get_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)
+    }
+
+    fn is_change_report(&self) -> bool {
+        true
+    }
+
+    fn is_vcs_capable_downloader(&self) -> bool {
+        true
+    }
+
+    fn is_dvcs_downloader(&self) -> bool {
+        false
+    }
+}
-- 
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