feat(fs): add .file(path).hard_link(path)

README.md

@@ -8,7 +8,7 @@ Provides injectable Filesystem and Network resources to make code more testable.
 - [x] `std::fs::copy` - `file(path).copy(target)` - Copies the contents of one file to another. This function will also copy the permission bits of the original file to the destination file.
 - [x] `std::fs::create_dir` - `dir(path).create()` - Creates a new, empty directory at the provided path
 - [x] `std::fs::create_dir_all` - `dir(path).create_all()` - Recursively create a directory and all of its parent components if they are missing.
-- [ ] `std::fs::hard_link` - `link(path)create()` - Creates a new hard link on the filesystem.
+- [x] `std::fs::hard_link` - `file(path).hard_link(other)` - Creates a new hard link on the filesystem.
 - [ ] `std::fs::metadata` - `path(path).metadata()` - Given a path, query the file system to get information about a file, directory, etc.
 - [x] `std::fs::read` - `file(path).reader().bytes()` - Read the entire contents of a file into a bytes vector.
 - [x] `std::fs::read_dir` - `dir(path).read()` - Returns an iterator over the entries within a directory.

src/fs/file.rs

@@ -76,4 +76,26 @@ impl<'base, 'path> FileHandle<'base, 'path> {
         self.check_error()?;
         std::fs::remove_file(self.as_pathbuf()).map_err(Error::Io)
     }
+
+    /// Creates a hard link on the filesystem.
+    ///
+    /// Wrapper for [std::fs::hard_link]
+    ///
+    /// ```
+    /// # use kxio::fs::Result;
+    /// # fn main() -> Result<()> {
+    /// let fs = kxio::fs::temp()?;
+    /// let src_path = fs.base().join("foo");
+    /// let src = fs.file(&src_path);
+    /// # src.write("bar")?;
+    /// let dst_path = fs.base().join("bar");
+    /// let dst = fs.file(&dst_path);
+    /// src.hard_link(&dst)?;
+    /// #    Ok(())
+    /// # }
+    /// ```
+    pub fn hard_link(&self, dest: &FileHandle<'base, 'path>) -> Result<()> {
+        self.check_error()?;
+        std::fs::hard_link(self.as_pathbuf(), dest.as_pathbuf()).map_err(Error::Io)
+    }
 }

tests/fs.rs

@@ -269,6 +269,21 @@ mod path {
 mod file {
     use super::*;
 
+    #[test]
+    fn create_hard_link() -> TestResult {
+        let fs = fs::temp().expect("temp fs");
+        let file_path = fs.base().join("foo");
+        let file = fs.file(&file_path);
+        file.write("content").expect("write");
+        let link_path = fs.base().join("bar");
+        let link = fs.file(&link_path);
+        file.hard_link(&link).expect("hard_link");
+        let exists = link.exists().expect("exists");
+        assert!(exists);
+
+        Ok(())
+    }
+
     #[test]
     /// Write to a file, read it, verify it exists, is a file and has the expected contents
     fn write_read_file_exists() -> TestResult {