chore: add vendor directory

1 files changed, 44 insertions, 0 deletions

diff --git a/vendor/tempfile/src/env.rs b/vendor/tempfile/src/env.rs
new file mode 100644
index 00000000..b9574510
--- /dev/null
+++ b/vendor/tempfile/src/env.rs
@@ -0,0 +1,44 @@
+use std::env;
+use std::path::{Path, PathBuf};
+
+// Once rust 1.70 is wide-spread (Debian stable), we can use OnceLock from stdlib.
+use once_cell::sync::OnceCell as OnceLock;
+
+static DEFAULT_TEMPDIR: OnceLock<PathBuf> = OnceLock::new();
+
+/// Override the default temporary directory (defaults to [`std::env::temp_dir`]). This function
+/// changes the _global_ default temporary directory for the entire program and should not be called
+/// except in exceptional cases where it's not configured correctly by the platform. Applications
+/// should first check if the path returned by [`env::temp_dir`] is acceptable.
+///
+/// Only the first call to this function will succeed. All further calls will fail with `Err(path)`
+/// where `path` is previously set default temporary directory override.
+///
+/// **NOTE:** This function does not check if the specified directory exists and/or is writable.
+pub fn override_temp_dir(path: &Path) -> Result<(), PathBuf> {
+    let mut we_set = false;
+    let val = DEFAULT_TEMPDIR.get_or_init(|| {
+        we_set = true;
+        path.to_path_buf()
+    });
+    if we_set {
+        Ok(())
+    } else {
+        Err(val.to_owned())
+    }
+}
+
+/// Returns the default temporary directory, used for both temporary directories and files if no
+/// directory is explicitly specified.
+///
+/// This function simply delegates to [`std::env::temp_dir`] unless the default temporary directory
+/// has been override by a call to [`override_temp_dir`].
+///
+/// **NOTE:** This function does check if the returned directory exists and/or is writable.
+pub fn temp_dir() -> PathBuf {
+    DEFAULT_TEMPDIR
+        .get()
+        .map(|p| p.to_owned())
+        // Don't cache this in case the user uses std::env::set to change the temporary directory.
+        .unwrap_or_else(env::temp_dir)
+}