From 10ee2acdd26a7f1298c6f6d6b7af9b469fe29b87 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 4 May 2024 14:41:41 +0200
Subject: Merging upstream version 1.70.0+dfsg2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 vendor/gix-lock/src/file.rs | 78 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 vendor/gix-lock/src/file.rs

(limited to 'vendor/gix-lock/src/file.rs')

diff --git a/vendor/gix-lock/src/file.rs b/vendor/gix-lock/src/file.rs
new file mode 100644
index 000000000..ad9a6db06
--- /dev/null
+++ b/vendor/gix-lock/src/file.rs
@@ -0,0 +1,78 @@
+use std::path::{Path, PathBuf};
+
+use crate::{File, Marker, DOT_LOCK_SUFFIX};
+
+fn strip_lock_suffix(lock_path: &Path) -> PathBuf {
+    let ext = lock_path
+        .extension()
+        .expect("at least our own extension")
+        .to_str()
+        .expect("no illegal UTF8 in extension");
+    lock_path.with_extension(ext.split_at(ext.len().saturating_sub(DOT_LOCK_SUFFIX.len())).0)
+}
+
+impl File {
+    /// Obtain a mutable reference to the write handle and call `f(out)` with it.
+    pub fn with_mut<T>(&mut self, f: impl FnOnce(&mut std::fs::File) -> std::io::Result<T>) -> std::io::Result<T> {
+        self.inner.with_mut(|tf| f(tf.as_file_mut())).and_then(|res| res)
+    }
+    /// Close the lock file to prevent further writes and to save system resources.
+    /// A call to [Marker::commit()] is allowed on the [`Marker`] to write changes back to the resource.
+    pub fn close(self) -> std::io::Result<Marker> {
+        Ok(Marker {
+            inner: self.inner.close()?,
+            created_from_file: true,
+            lock_path: self.lock_path,
+        })
+    }
+
+    /// Return the path at which the lock file resides
+    pub fn lock_path(&self) -> &Path {
+        &self.lock_path
+    }
+
+    /// Return the path at which the locked resource resides
+    pub fn resource_path(&self) -> PathBuf {
+        strip_lock_suffix(&self.lock_path)
+    }
+}
+
+mod io_impls {
+    use std::{io, io::SeekFrom};
+
+    use super::File;
+
+    impl io::Write for File {
+        fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+            self.inner.with_mut(|f| f.write(buf))?
+        }
+
+        fn flush(&mut self) -> io::Result<()> {
+            self.inner.with_mut(|f| f.flush())?
+        }
+    }
+
+    impl io::Seek for File {
+        fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> {
+            self.inner.with_mut(|f| f.seek(pos))?
+        }
+    }
+
+    impl io::Read for File {
+        fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+            self.inner.with_mut(|f| f.read(buf))?
+        }
+    }
+}
+
+impl Marker {
+    /// Return the path at which the lock file resides
+    pub fn lock_path(&self) -> &Path {
+        &self.lock_path
+    }
+
+    /// Return the path at which the locked resource resides
+    pub fn resource_path(&self) -> PathBuf {
+        strip_lock_suffix(&self.lock_path)
+    }
+}
-- 
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