Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 572 insertions, 0 deletions

diff --git a/vendor/same-file/src/lib.rs b/vendor/same-file/src/lib.rs
new file mode 100644
index 000000000..ed7ccf509
--- /dev/null
+++ b/vendor/same-file/src/lib.rs
@@ -0,0 +1,572 @@
+/*!
+This crate provides a safe and simple **cross platform** way to determine
+whether two file paths refer to the same file or directory.
+
+Most uses of this crate should be limited to the top-level [`is_same_file`]
+function, which takes two file paths and returns true if they refer to the
+same file or directory:
+
+```rust,no_run
+# use std::error::Error;
+use same_file::is_same_file;
+
+# fn try_main() -> Result<(), Box<Error>> {
+assert!(is_same_file("/bin/sh", "/usr/bin/sh")?);
+#    Ok(())
+# }
+#
+# fn main() {
+#    try_main().unwrap();
+# }
+```
+
+Additionally, this crate provides a [`Handle`] type that permits a more efficient
+equality check depending on your access pattern. For example, if one wanted to
+check whether any path in a list of paths corresponded to the process' stdout
+handle, then one could build a handle once for stdout. The equality check for
+each file in the list then only requires one stat call instead of two. The code
+might look like this:
+
+```rust,no_run
+# use std::error::Error;
+use same_file::Handle;
+
+# fn try_main() -> Result<(), Box<Error>> {
+let candidates = &[
+    "examples/is_same_file.rs",
+    "examples/is_stderr.rs",
+    "examples/stderr",
+];
+let stdout_handle = Handle::stdout()?;
+for candidate in candidates {
+    let handle = Handle::from_path(candidate)?;
+    if stdout_handle == handle {
+        println!("{:?} is stdout!", candidate);
+    } else {
+        println!("{:?} is NOT stdout!", candidate);
+    }
+}
+#    Ok(())
+# }
+#
+# fn main() {
+#     try_main().unwrap();
+# }
+```
+
+See [`examples/is_stderr.rs`] for a runnable example and compare the output of:
+
+- `cargo run --example is_stderr 2> examples/stderr` and
+- `cargo run --example is_stderr`.
+
+[`is_same_file`]: fn.is_same_file.html
+[`Handle`]: struct.Handle.html
+[`examples/is_stderr.rs`]: https://github.com/BurntSushi/same-file/blob/master/examples/is_same_file.rs
+
+*/
+
+#![allow(bare_trait_objects, unknown_lints)]
+#![deny(missing_docs)]
+
+#[cfg(test)]
+doc_comment::doctest!("../README.md");
+
+use std::fs::File;
+use std::io;
+use std::path::Path;
+
+#[cfg(any(target_os = "redox", unix))]
+use crate::unix as imp;
+#[cfg(not(any(target_os = "redox", unix, windows)))]
+use unknown as imp;
+#[cfg(windows)]
+use win as imp;
+
+#[cfg(any(target_os = "redox", unix))]
+mod unix;
+#[cfg(not(any(target_os = "redox", unix, windows)))]
+mod unknown;
+#[cfg(windows)]
+mod win;
+
+/// A handle to a file that can be tested for equality with other handles.
+///
+/// If two files are the same, then any two handles of those files will compare
+/// equal. If two files are not the same, then any two handles of those files
+/// will compare not-equal.
+///
+/// A handle consumes an open file resource as long as it exists.
+///
+/// Equality is determined by comparing inode numbers on Unix and a combination
+/// of identifier, volume serial, and file size on Windows. Note that it's
+/// possible for comparing two handles to produce a false positive on some
+/// platforms. Namely, two handles can compare equal even if the two handles
+/// *don't* point to the same file. Check the [source] for specific
+/// implementation details.
+///
+/// [source]: https://github.com/BurntSushi/same-file/tree/master/src
+#[derive(Debug, Eq, PartialEq, Hash)]
+pub struct Handle(imp::Handle);
+
+impl Handle {
+    /// Construct a handle from a path.
+    ///
+    /// Note that the underlying [`File`] is opened in read-only mode on all
+    /// platforms.
+    ///
+    /// [`File`]: https://doc.rust-lang.org/std/fs/struct.File.html
+    ///
+    /// # Errors
+    /// This method will return an [`io::Error`] if the path cannot
+    /// be opened, or the file's metadata cannot be obtained.
+    /// The most common reasons for this are: the path does not
+    /// exist, or there were not enough permissions.
+    ///
+    /// [`io::Error`]: https://doc.rust-lang.org/std/io/struct.Error.html
+    ///
+    /// # Examples
+    /// Check that two paths are not the same file:
+    ///
+    /// ```rust,no_run
+    /// # use std::error::Error;
+    /// use same_file::Handle;
+    ///
+    /// # fn try_main() -> Result<(), Box<Error>> {
+    /// let source = Handle::from_path("./source")?;
+    /// let target = Handle::from_path("./target")?;
+    /// assert_ne!(source, target, "The files are the same.");
+    /// # Ok(())
+    /// # }
+    /// #
+    /// # fn main() {
+    /// #     try_main().unwrap();
+    /// # }
+    /// ```
+    pub fn from_path<P: AsRef<Path>>(p: P) -> io::Result<Handle> {
+        imp::Handle::from_path(p).map(Handle)
+    }
+
+    /// Construct a handle from a file.
+    ///
+    /// # Errors
+    /// This method will return an [`io::Error`] if the metadata for
+    /// the given [`File`] cannot be obtained.
+    ///
+    /// [`io::Error`]: https://doc.rust-lang.org/std/io/struct.Error.html
+    /// [`File`]: https://doc.rust-lang.org/std/fs/struct.File.html
+    ///
+    /// # Examples
+    /// Check that two files are not in fact the same file:
+    ///
+    /// ```rust,no_run
+    /// # use std::error::Error;
+    /// # use std::fs::File;
+    /// use same_file::Handle;
+    ///
+    /// # fn try_main() -> Result<(), Box<Error>> {
+    /// let source = File::open("./source")?;
+    /// let target = File::open("./target")?;
+    ///
+    /// assert_ne!(
+    ///     Handle::from_file(source)?,
+    ///     Handle::from_file(target)?,
+    ///     "The files are the same."
+    /// );
+    /// #     Ok(())
+    /// # }
+    /// #
+    /// # fn main() {
+    /// #     try_main().unwrap();
+    /// # }
+    /// ```
+    pub fn from_file(file: File) -> io::Result<Handle> {
+        imp::Handle::from_file(file).map(Handle)
+    }
+
+    /// Construct a handle from stdin.
+    ///
+    /// # Errors
+    /// This method will return an [`io::Error`] if stdin cannot
+    /// be opened due to any I/O-related reason.
+    ///
+    /// [`io::Error`]: https://doc.rust-lang.org/std/io/struct.Error.html
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// # use std::error::Error;
+    /// use same_file::Handle;
+    ///
+    /// # fn try_main() -> Result<(), Box<Error>> {
+    /// let stdin = Handle::stdin()?;
+    /// let stdout = Handle::stdout()?;
+    /// let stderr = Handle::stderr()?;
+    ///
+    /// if stdin == stdout {
+    ///     println!("stdin == stdout");
+    /// }
+    /// if stdin == stderr {
+    ///     println!("stdin == stderr");
+    /// }
+    /// if stdout == stderr {
+    ///     println!("stdout == stderr");
+    /// }
+    /// #
+    /// #     Ok(())
+    /// # }
+    /// #
+    /// # fn main() {
+    /// #     try_main().unwrap();
+    /// # }
+    /// ```
+    ///
+    /// The output differs depending on the platform.
+    ///
+    /// On Linux:
+    ///
+    /// ```text
+    /// $ ./example
+    /// stdin == stdout
+    /// stdin == stderr
+    /// stdout == stderr
+    /// $ ./example > result
+    /// $ cat result
+    /// stdin == stderr
+    /// $ ./example > result 2>&1
+    /// $ cat result
+    /// stdout == stderr
+    /// ```
+    ///
+    /// Windows:
+    ///
+    /// ```text
+    /// > example
+    /// > example > result 2>&1
+    /// > type result
+    /// stdout == stderr
+    /// ```
+    pub fn stdin() -> io::Result<Handle> {
+        imp::Handle::stdin().map(Handle)
+    }
+
+    /// Construct a handle from stdout.
+    ///
+    /// # Errors
+    /// This method will return an [`io::Error`] if stdout cannot
+    /// be opened due to any I/O-related reason.
+    ///
+    /// [`io::Error`]: https://doc.rust-lang.org/std/io/struct.Error.html
+    ///
+    /// # Examples
+    /// See the example for [`stdin()`].
+    ///
+    /// [`stdin()`]: #method.stdin
+    pub fn stdout() -> io::Result<Handle> {
+        imp::Handle::stdout().map(Handle)
+    }
+
+    /// Construct a handle from stderr.
+    ///
+    /// # Errors
+    /// This method will return an [`io::Error`] if stderr cannot
+    /// be opened due to any I/O-related reason.
+    ///
+    /// [`io::Error`]: https://doc.rust-lang.org/std/io/struct.Error.html
+    ///
+    /// # Examples
+    /// See the example for [`stdin()`].
+    ///
+    /// [`stdin()`]: #method.stdin
+    pub fn stderr() -> io::Result<Handle> {
+        imp::Handle::stderr().map(Handle)
+    }
+
+    /// Return a reference to the underlying file.
+    ///
+    /// # Examples
+    /// Ensure that the target file is not the same as the source one,
+    /// and copy the data to it:
+    ///
+    /// ```rust,no_run
+    /// # use std::error::Error;
+    /// use std::io::prelude::*;
+    /// use std::io::Write;
+    /// use std::fs::File;
+    /// use same_file::Handle;
+    ///
+    /// # fn try_main() -> Result<(), Box<Error>> {
+    /// let source = File::open("source")?;
+    /// let target = File::create("target")?;
+    ///
+    /// let source_handle = Handle::from_file(source)?;
+    /// let mut target_handle = Handle::from_file(target)?;
+    /// assert_ne!(source_handle, target_handle, "The files are the same.");
+    ///
+    /// let mut source = source_handle.as_file();
+    /// let target = target_handle.as_file_mut();
+    ///
+    /// let mut buffer = Vec::new();
+    /// // data copy is simplified for the purposes of the example
+    /// source.read_to_end(&mut buffer)?;
+    /// target.write_all(&buffer)?;
+    /// #
+    /// #    Ok(())
+    /// # }
+    /// #
+    /// # fn main() {
+    /// #    try_main().unwrap();
+    /// # }
+    /// ```
+    pub fn as_file(&self) -> &File {
+        self.0.as_file()
+    }
+
+    /// Return a mutable reference to the underlying file.
+    ///
+    /// # Examples
+    /// See the example for [`as_file()`].
+    ///
+    /// [`as_file()`]: #method.as_file
+    pub fn as_file_mut(&mut self) -> &mut File {
+        self.0.as_file_mut()
+    }
+
+    /// Return the underlying device number of this handle.
+    ///
+    /// Note that this only works on unix platforms.
+    #[cfg(any(target_os = "redox", unix))]
+    pub fn dev(&self) -> u64 {
+        self.0.dev()
+    }
+
+    /// Return the underlying inode number of this handle.
+    ///
+    /// Note that this only works on unix platforms.
+    #[cfg(any(target_os = "redox", unix))]
+    pub fn ino(&self) -> u64 {
+        self.0.ino()
+    }
+}
+
+/// Returns true if the two file paths may correspond to the same file.
+///
+/// Note that it's possible for this to produce a false positive on some
+/// platforms. Namely, this can return true even if the two file paths *don't*
+/// resolve to the same file.
+/// # Errors
+/// This function will return an [`io::Error`] if any of the two paths cannot
+/// be opened. The most common reasons for this are: the path does not exist,
+/// or there were not enough permissions.
+///
+/// [`io::Error`]: https://doc.rust-lang.org/std/io/struct.Error.html
+///
+/// # Example
+///
+/// ```rust,no_run
+/// use same_file::is_same_file;
+///
+/// assert!(is_same_file("./foo", "././foo").unwrap_or(false));
+/// ```
+pub fn is_same_file<P, Q>(path1: P, path2: Q) -> io::Result<bool>
+where
+    P: AsRef<Path>,
+    Q: AsRef<Path>,
+{
+    Ok(Handle::from_path(path1)? == Handle::from_path(path2)?)
+}
+
+#[cfg(test)]
+mod tests {
+    use std::env;
+    use std::error;
+    use std::fs::{self, File};
+    use std::io;
+    use std::path::{Path, PathBuf};
+    use std::result;
+
+    use super::is_same_file;
+
+    type Result<T> = result::Result<T, Box<error::Error + Send + Sync>>;
+
+    /// Create an error from a format!-like syntax.
+    macro_rules! err {
+        ($($tt:tt)*) => {
+            Box::<error::Error + Send + Sync>::from(format!($($tt)*))
+        }
+    }
+
+    /// A simple wrapper for creating a temporary directory that is
+    /// automatically deleted when it's dropped.
+    ///
+    /// We use this in lieu of tempfile because tempfile brings in too many
+    /// dependencies.
+    #[derive(Debug)]
+    struct TempDir(PathBuf);
+
+    impl Drop for TempDir {
+        fn drop(&mut self) {
+            fs::remove_dir_all(&self.0).unwrap();
+        }
+    }
+
+    impl TempDir {
+        /// Create a new empty temporary directory under the system's
+        /// configured temporary directory.
+        fn new() -> Result<TempDir> {
+            #![allow(deprecated)]
+
+            use std::sync::atomic::{
+                AtomicUsize, Ordering, ATOMIC_USIZE_INIT,
+            };
+
+            static TRIES: usize = 100;
+            static COUNTER: AtomicUsize = ATOMIC_USIZE_INIT;
+
+            let tmpdir = env::temp_dir();
+            for _ in 0..TRIES {
+                let count = COUNTER.fetch_add(1, Ordering::SeqCst);
+                let path = tmpdir.join("rust-walkdir").join(count.to_string());
+                if path.is_dir() {
+                    continue;
+                }
+                fs::create_dir_all(&path).map_err(|e| {
+                    err!("failed to create {}: {}", path.display(), e)
+                })?;
+                return Ok(TempDir(path));
+            }
+            Err(err!("failed to create temp dir after {} tries", TRIES))
+        }
+
+        /// Return the underlying path to this temporary directory.
+        fn path(&self) -> &Path {
+            &self.0
+        }
+    }
+
+    fn tmpdir() -> TempDir {
+        TempDir::new().unwrap()
+    }
+
+    #[cfg(unix)]
+    pub fn soft_link_dir<P: AsRef<Path>, Q: AsRef<Path>>(
+        src: P,
+        dst: Q,
+    ) -> io::Result<()> {
+        use std::os::unix::fs::symlink;
+        symlink(src, dst)
+    }
+
+    #[cfg(unix)]
+    pub fn soft_link_file<P: AsRef<Path>, Q: AsRef<Path>>(
+        src: P,
+        dst: Q,
+    ) -> io::Result<()> {
+        soft_link_dir(src, dst)
+    }
+
+    #[cfg(windows)]
+    pub fn soft_link_dir<P: AsRef<Path>, Q: AsRef<Path>>(
+        src: P,
+        dst: Q,
+    ) -> io::Result<()> {
+        use std::os::windows::fs::symlink_dir;
+        symlink_dir(src, dst)
+    }
+
+    #[cfg(windows)]
+    pub fn soft_link_file<P: AsRef<Path>, Q: AsRef<Path>>(
+        src: P,
+        dst: Q,
+    ) -> io::Result<()> {
+        use std::os::windows::fs::symlink_file;
+        symlink_file(src, dst)
+    }
+
+    // These tests are rather uninteresting. The really interesting tests
+    // would stress the edge cases. On Unix, this might be comparing two files
+    // on different mount points with the same inode number. On Windows, this
+    // might be comparing two files whose file indices are the same on file
+    // systems where such things aren't guaranteed to be unique.
+    //
+    // Alas, I don't know how to create those environmental conditions. ---AG
+
+    #[test]
+    fn same_file_trivial() {
+        let tdir = tmpdir();
+        let dir = tdir.path();
+
+        File::create(dir.join("a")).unwrap();
+        assert!(is_same_file(dir.join("a"), dir.join("a")).unwrap());
+    }
+
+    #[test]
+    fn same_dir_trivial() {
+        let tdir = tmpdir();
+        let dir = tdir.path();
+
+        fs::create_dir(dir.join("a")).unwrap();
+        assert!(is_same_file(dir.join("a"), dir.join("a")).unwrap());
+    }
+
+    #[test]
+    fn not_same_file_trivial() {
+        let tdir = tmpdir();
+        let dir = tdir.path();
+
+        File::create(dir.join("a")).unwrap();
+        File::create(dir.join("b")).unwrap();
+        assert!(!is_same_file(dir.join("a"), dir.join("b")).unwrap());
+    }
+
+    #[test]
+    fn not_same_dir_trivial() {
+        let tdir = tmpdir();
+        let dir = tdir.path();
+
+        fs::create_dir(dir.join("a")).unwrap();
+        fs::create_dir(dir.join("b")).unwrap();
+        assert!(!is_same_file(dir.join("a"), dir.join("b")).unwrap());
+    }
+
+    #[test]
+    fn same_file_hard() {
+        let tdir = tmpdir();
+        let dir = tdir.path();
+
+        File::create(dir.join("a")).unwrap();
+        fs::hard_link(dir.join("a"), dir.join("alink")).unwrap();
+        assert!(is_same_file(dir.join("a"), dir.join("alink")).unwrap());
+    }
+
+    #[test]
+    fn same_file_soft() {
+        let tdir = tmpdir();
+        let dir = tdir.path();
+
+        File::create(dir.join("a")).unwrap();
+        soft_link_file(dir.join("a"), dir.join("alink")).unwrap();
+        assert!(is_same_file(dir.join("a"), dir.join("alink")).unwrap());
+    }
+
+    #[test]
+    fn same_dir_soft() {
+        let tdir = tmpdir();
+        let dir = tdir.path();
+
+        fs::create_dir(dir.join("a")).unwrap();
+        soft_link_dir(dir.join("a"), dir.join("alink")).unwrap();
+        assert!(is_same_file(dir.join("a"), dir.join("alink")).unwrap());
+    }
+
+    #[test]
+    fn test_send() {
+        fn assert_send<T: Send>() {}
+        assert_send::<super::Handle>();
+    }
+
+    #[test]
+    fn test_sync() {
+        fn assert_sync<T: Sync>() {}
+        assert_sync::<super::Handle>();
+    }
+}