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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.
fn local_changes(&self, target: &Path) -> Result<Option<String>>;
/// Get commit log between two references.
fn commit_logs(&self, from: &str, to: &str, target: &Path) -> Result<String>;
}
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