Add '--hard' option to 'link' command

Resolves sxyazi#1258.

yazi-core/src/manager/commands/link.rs

@@ -4,11 +4,14 @@ use crate::{manager::Manager, tasks::Tasks};
 
 pub struct Opt {
 	relative: bool,
+	hard:     bool,
 	force:    bool,
 }
 
 impl From<Cmd> for Opt {
-	fn from(c: Cmd) -> Self { Self { relative: c.bool("relative"), force: c.bool("force") } }
+	fn from(c: Cmd) -> Self {
+		Self { relative: c.bool("relative"), hard: c.bool("hard"), force: c.bool("force") }
+	}
 }
 
 impl Manager {
@@ -18,6 +21,6 @@ impl Manager {
 		}
 
 		let opt = opt.into() as Opt;
-		tasks.file_link(&self.yanked, self.cwd(), opt.relative, opt.force);
+		tasks.file_link(&self.yanked, self.cwd(), opt.relative, opt.hard, opt.force);
 	}
 }

yazi-core/src/tasks/file.rs

@@ -28,13 +28,13 @@ impl Tasks {
 		}
 	}
 
-	pub fn file_link(&self, src: &HashSet<Url>, dest: &Url, relative: bool, force: bool) {
+	pub fn file_link(&self, src: &HashSet<Url>, dest: &Url, relative: bool, hard: bool, force: bool) {
 		for u in src {
 			let to = dest.join(u.file_name().unwrap());
 			if force && *u == to {
 				debug!("file_link: same file, skipping {:?}", to);
 			} else {
-				self.scheduler.file_link(u.clone(), to, relative, force);
+				self.scheduler.file_link(u.clone(), to, relative, hard, force);
 			}
 		}
 	}

yazi-scheduler/src/file/file.rs

@@ -81,16 +81,25 @@ impl File {
 				};
 
 				ok_or_not_found(fs::remove_file(&task.to).await)?;
-				#[cfg(unix)]
-				{
-					fs::symlink(src, &task.to).await?
-				}
-				#[cfg(windows)]
-				{
-					if meta.is_dir() {
-						fs::symlink_dir(src, &task.to).await?
+
+				if task.hard {
+					if !src.is_symlink() && src.is_dir() {
+						hard_link_directory(src, &task.to).await?;
 					} else {
-						fs::symlink_file(src, &task.to).await?
+						fs::hard_link(src, &task.to).await?;
+					}
+				} else {
+					#[cfg(unix)]
+					{
+						fs::symlink(src, &task.to).await?
+					}
+					#[cfg(windows)]
+					{
+						if meta.is_dir() {
+							fs::symlink_dir(src, &task.to).await?
+						} else {
+							fs::symlink_file(src, &task.to).await?
+						}
 					}
 				}
 
@@ -276,6 +285,24 @@ impl File {
 	}
 }
 
+async fn hard_link_directory(src: impl AsRef<Path>, dst: impl AsRef<Path>) -> Result<()> {
+	fs::create_dir(&dst).await?;
+
+	let mut directory = fs::read_dir(src).await?;
+
+	while let Some(entry) = directory.next_entry().await? {
+		let target_path = dst.as_ref().join(entry.file_name());
+
+		if entry.file_type().await?.is_dir() {
+			Box::pin(hard_link_directory(entry.path(), target_path)).await?;
+		} else {
+			fs::hard_link(entry.path(), target_path).await?;
+		}
+	}
+
+	Ok(())
+}
+
 impl File {
 	#[inline]
 	fn succ(&self, id: usize) -> Result<()> { Ok(self.prog.send(TaskProg::Succ(id))?) }

yazi-scheduler/src/file/op.rs

@@ -54,6 +54,7 @@ pub struct FileOpLink {
 	pub meta:     Option<Metadata>,
 	pub resolve:  bool,
 	pub relative: bool,
+	pub hard:     bool,
 	pub delete:   bool,
 }
 
@@ -66,6 +67,7 @@ impl From<FileOpPaste> for FileOpLink {
 			meta:     value.meta,
 			resolve:  true,
 			relative: false,
+			hard:     false,
 			delete:   value.cut,
 		}
 	}

yazi-scheduler/src/scheduler.rs

@@ -134,7 +134,7 @@ impl Scheduler {
 		);
 	}
 
-	pub fn file_link(&self, from: Url, mut to: Url, relative: bool, force: bool) {
+	pub fn file_link(&self, from: Url, mut to: Url, relative: bool, hard: bool, force: bool) {
 		let name = format!("Link {from:?} to {to:?}");
 		let id = self.ongoing.lock().add(TaskKind::User, name);
 
@@ -145,7 +145,16 @@ impl Scheduler {
 					to = unique_path(to).await;
 				}
 				file
-					.link(FileOpLink { id, from, to, meta: None, resolve: false, relative, delete: false })
+					.link(FileOpLink {
+						id,
+						from,
+						to,
+						meta: None,
+						resolve: false,
+						relative,
+						hard,
+						delete: false,
+					})
 					.await
 					.ok();
 			}