refactor(downloader): introduce top-level downloader module

Move VCS downloaders and DownloadManager out of vcs/repository into a
new top-level downloader module mirroring Composer\Downloader, and add
stub types for the remaining Composer downloader hierarchy (file,
archive variants, path, perforce, fossil, exceptions, interfaces) so
future ports have a home.

1 files changed, 0 insertions, 84 deletions

diff --git a/crates/mozart-core/src/vcs/downloader/hg.rs b/crates/mozart-core/src/vcs/downloader/hg.rs
deleted file mode 100644
index 33650f8..0000000
--- a/crates/mozart-core/src/vcs/downloader/hg.rs
+++ /dev/null
@@ -1,84 +0,0 @@
-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
-    }
-}