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, 56 deletions

diff --git a/crates/mozart-core/src/vcs/downloader/mod.rs b/crates/mozart-core/src/vcs/downloader/mod.rs
deleted file mode 100644
index 352f330..0000000
--- a/crates/mozart-core/src/vcs/downloader/mod.rs
+++ /dev/null
@@ -1,56 +0,0 @@
-pub mod git;
-pub mod hg;
-pub mod svn;
-
-use std::path::Path;
-
-use anyhow::Result;
-
-/// The VCS downloader interface.
-///
-/// Corresponds to Composer's `VcsDownloader` hierarchy.
-pub trait VcsDownloader {
-    /// Prepare for installation (e.g., sync mirror cache).
-    fn download(&self, url: &str, reference: &str, target: &Path) -> Result<()>;
-
-    /// Install (clone/checkout) the source to the target directory.
-    fn install(&self, url: &str, reference: &str, target: &Path) -> Result<()>;
-
-    /// Update the source at target to a new reference.
-    fn update(&self, url: &str, old_ref: &str, new_ref: &str, target: &Path) -> Result<()>;
-
-    /// Remove the source from the target directory.
-    fn remove(&self, target: &Path) -> Result<()>;
-
-    /// Detect local changes in the working copy.
-    /// Returns `None` if clean, `Some(diff)` if modified.
-    /// Mirrors `Composer\Downloader\ChangeReportInterface::getLocalChanges`.
-    fn get_local_changes(&self, target: &Path) -> Result<Option<String>>;
-
-    /// Detect commits present locally but not on the tracking remote.
-    /// Returns `None` if there are no unpushed commits or the concept does
-    /// not apply (only `GitDownloader` implements this in Composer's
-    /// `DvcsDownloaderInterface`).
-    fn unpushed_changes(&self, _target: &Path) -> Result<Option<String>> {
-        Ok(None)
-    }
-
-    /// Resolve the working copy's current VCS reference (e.g. commit hash).
-    /// Returns `None` if no reference can be determined. Mirrors
-    /// `Composer\Downloader\VcsCapableDownloaderInterface::getVcsReference`.
-    fn vcs_reference(&self, _target: &Path) -> Result<Option<String>> {
-        Ok(None)
-    }
-
-    /// Get commit log between two references.
-    fn commit_logs(&self, from: &str, to: &str, target: &Path) -> Result<String>;
-
-    /// instanceof ChangeReportInterface
-    fn is_change_report(&self) -> bool;
-
-    /// instanceof VcsCapableDownloaderInterface
-    fn is_vcs_capable_downloader(&self) -> bool;
-
-    /// instanceof DvcsDownloaderInterface
-    fn is_dvcs_downloader(&self) -> bool;
-}