From e84b99d1e5fa44415459455e1082c607f1fa9f8c Mon Sep 17 00:00:00 2001
From: Samuel Moelius <samuel.moelius@trailofbits.com>
Date: Thu, 21 Nov 2024 18:49:30 -0500
Subject: [PATCH] Neglect NTFS

---
 Cargo.toml           |  1 +
 src/on_disk_cache.rs | 28 ++++++++++++++++++++++------
 2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 2647fc66..85372374 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -54,6 +54,7 @@ default = ["on-disk-cache", "lock-index"]
 cache-repositories = ["on-disk-cache"]
 on-disk-cache = []
 lock-index = ["libc", "windows-sys"]
+__neglect_ntfs = []
 
 [lints.rust.unexpected_cfgs]
 level = "deny"
diff --git a/src/on_disk_cache.rs b/src/on_disk_cache.rs
index 6171a593..34ca61de 100644
--- a/src/on_disk_cache.rs
+++ b/src/on_disk_cache.rs
@@ -40,7 +40,6 @@ use std::{
     str::FromStr,
     time::{Duration, SystemTime},
 };
-use tempfile::{tempdir, TempDir};
 
 const DEFAULT_REFRESH_AGE: u64 = 30; // days
 
@@ -55,7 +54,7 @@ struct Entry {
 }
 
 pub(crate) struct Cache {
-    tempdir: Option<TempDir>,
+    tempdir: Option<tempfile::TempDir>,
     refresh_age: u64, // days
     entries: HashMap<String, Entry>,
     repository_timestamps: HashMap<String, SystemTime>,
@@ -80,6 +79,21 @@ static CACHE_DIRECTORY: Lazy<PathBuf> = Lazy::new(|| {
 static CRATES_IO_SYNC_CLIENT: Lazy<SyncClient> =
     Lazy::new(|| SyncClient::new(USER_AGENT, RATE_LIMIT).unwrap());
 
+#[cfg(any(feature = "__neglect_ntfs", windows))]
+#[allow(clippy::unwrap_used)]
+static GIT_CONFIG: Lazy<tempfile::NamedTempFile> = Lazy::new(|| {
+    use std::io::Write;
+    let mut tempfile = tempfile::NamedTempFile::new().unwrap();
+    writeln!(
+        tempfile,
+        "\
+    [core]
+        protectNTFS = false"
+    )
+    .unwrap();
+    tempfile
+});
+
 pub fn with_cache<T>(f: impl FnOnce(&mut Cache) -> T) -> T {
     CACHE_ONCE_CELL.with_borrow_mut(|once_cell| {
         let _: &Cache = once_cell.get_or_init(|| {
@@ -107,7 +121,7 @@ pub fn with_cache<T>(f: impl FnOnce(&mut Cache) -> T) -> T {
 impl Cache {
     fn new(temporary: bool, refresh_age: u64) -> Result<Self> {
         let tempdir = if temporary {
-            tempdir()
+            tempfile::tempdir()
                 .map(Option::Some)
                 .with_context(|| "failed to create temporary directory")?
         } else {
@@ -188,8 +202,10 @@ impl Cache {
             command
                 .env("GCM_INTERACTIVE", "never")
                 .env("GIT_ASKPASS", "echo")
-                .env("GIT_TERMINAL_PROMPT", "0")
-                .stderr(Stdio::piped());
+                .env("GIT_TERMINAL_PROMPT", "0");
+            #[cfg(any(feature = "__neglect_ntfs", windows))]
+            command.env("GIT_CONFIG_GLOBAL", GIT_CONFIG.path());
+            command.stderr(Stdio::piped());
             let output = command
                 .output()
                 .with_context(|| format!("failed to run command: {command:?}"))?;
@@ -356,7 +372,7 @@ impl Cache {
     }
 
     fn base_dir(&self) -> &Path {
-        let base_dir = self.tempdir.as_ref().map(TempDir::path);
+        let base_dir = self.tempdir.as_ref().map(tempfile::TempDir::path);
 
         #[cfg(all(feature = "on-disk-cache", not(windows)))]
         return base_dir.unwrap_or(&CACHE_DIRECTORY);