feat: implementation for macOS

Moves files to trash on macOS by executing an AppleScript command to
delete all requested paths.

src/macos.rs

@@ -1,20 +1,63 @@
-
+use std::ffi::OsString;
 use std::path::Path;
+use std::process::Command;
 
 use crate::Error;
 
 pub fn is_implemented() -> bool {
-    false
+    true
 }
 
 pub fn remove_all<I, T>(paths: I) -> Result<(), Error>
 where
     I: IntoIterator<Item = T>,
     T: AsRef<Path>,
 {
-    unimplemented!();
+    let full_paths = paths
+        .into_iter()
+        // Convert paths into canonical, absolute forms and collect errors
+        .map(|path| {
+            path.as_ref()
+                .canonicalize()
+                .map_err(|e| Error::CanonicalizePath {
+                    code: e.raw_os_error(),
+                })
+        })
+        // Convert paths into &strs and collect errors
+        .map(|path| path.and_then(|p| p.to_str().ok_or(Error::Unknown).map(|s| s.to_owned())))
+        .collect::<Result<Vec<String>, Error>>()?;
+
+    // AppleScript command to move files (or directories) to Trash looks like
+    //   osascript -e 'tell application "Finder" to delete { POSIX file "file1", POSIX "file2" }'
+    // The `-e` flag is used to execute only one line of AppleScript.
+    let mut command = Command::new("osascript");
+    let posix_files = full_paths
+        .into_iter()
+        .map(|p| format!("POSIX file \"{}\"", p))
+        .collect::<Vec<String>>()
+        .join(", ");
+    let script = format!(
+        "tell application \"Finder\" to delete {{ {} }}",
+        posix_files
+    );
+
+    let argv: Vec<OsString> = vec!["-e".into(), script.into()];
+    command.args(argv);
+
+    // Execute command
+    let result = command.output().map_err(|e| Error::Remove {
+        code: e.raw_os_error(),
+    })?;
+
+    if !result.status.success() {
+        return Err(Error::Remove {
+            code: result.status.code(),
+        });
+    }
+
+    Ok(())
 }
 
 pub fn remove<T: AsRef<Path>>(path: T) -> Result<(), Error> {
-    unimplemented!();
+    remove_all(&[path])
 }