feat: hash file

crates/forky_fs/src/fs/fs_ext.rs

@@ -1,13 +1,7 @@
 use crate::prelude::*;
 use forky_core::prelude::PathExt;
-use std::collections::hash_map::DefaultHasher;
 use std::ffi::OsString;
 use std::fs;
-use std::fs::File;
-use std::hash::Hash;
-use std::hash::Hasher;
-use std::io;
-use std::io::prelude::*;
 use std::path::Path;
 use std::path::PathBuf;
 
@@ -38,6 +32,7 @@ impl FsExt {
 		Ok(())
 	}
 
+
 	// pub fn dir_contains(path: PathBuf, pattern: &str) -> bool {
 	// 	let pattern = Pattern::new(pattern).unwrap();
 	// 	glob::glob_with(
@@ -53,29 +48,6 @@ impl FsExt {
 	// 		.any(|p| pattern. p.to_str().unwrap().contains(pattern))
 	// }
 
-	pub fn hash_file(path: impl AsRef<Path>) -> io::Result<u64> {
-		let mut hasher = DefaultHasher::new();
-		let mut file = fs::File::open(path)?;
-
-		let mut buffer = Vec::new();
-		file.read_to_end(&mut buffer)?;
-		buffer.hash(&mut hasher);
-
-		let hash = hasher.finish();
-		Ok(hash)
-	}
-
-
-
-	pub fn write<P>(filename: P, data: &str) -> io::Result<()>
-	where
-		P: AsRef<Path>,
-	{
-		let mut file = File::create(filename)?;
-		file.write_all(data.as_bytes())?;
-		Ok(())
-	}
-
 	/// Return the closest ancestor (inclusive) that contains a `Cargo.lock` file
 	/// # Panics
 	/// - The current directory is not found

crates/forky_fs/src/fs/read_file.rs

@@ -1,5 +1,9 @@
 use super::FsError;
 use super::FsResult;
+use std::fs;
+use std::hash::DefaultHasher;
+use std::hash::Hash;
+use std::hash::Hasher;
 use std::path::Path;
 
 
@@ -14,6 +18,24 @@ impl ReadFile {
 	pub fn to_bytes(path: impl AsRef<Path>) -> FsResult<Vec<u8>> {
 		std::fs::read(&path).map_err(|e| FsError::from_io_with_file(e, path))
 	}
+
+
+	pub fn hash_file(path: impl AsRef<Path>) -> FsResult<u64> {
+		let mut hasher = DefaultHasher::new();
+		let file = Self::to_bytes(path)?;
+		file.hash(&mut hasher);
+		let hash = hasher.finish();
+		Ok(hash)
+	}
+
+	/// Write a file, ensuring the path exists
+	pub fn write(path: impl AsRef<Path>, data: &str) -> FsResult<()> {
+		if let Some(parent) = path.as_ref().parent() {
+			fs::create_dir_all(parent)?;
+		}
+		fs::write(path, data)?;
+		Ok(())
+	}
 }
 
 
@@ -43,4 +65,15 @@ mod test {
 		expect(ReadFile::to_bytes(FsExt::test_dir().join("foo.rs")))
 			.to_be_err();
 	}
+
+
+	#[test]
+	fn hash() {
+		let hash1 =
+			ReadFile::hash_file(FsExt::test_dir().join("mod.rs")).unwrap();
+		let hash2 =
+			ReadFile::hash_file(FsExt::test_dir().join("included_file.rs"))
+				.unwrap();
+		expect(hash1).not().to_be(hash2);
+	}
 }