Initial public release of Warp.

Repo-Sync-Origin: warpdotdev/warp-internal@12af1d983b

app/src/resource_limits.rs

@@ -0,0 +1,33 @@
+/// Adjusts resource limits applied to the Warp process (e.g.: the limit on open
+/// file descriptors) to ensure proper behavior.
+pub fn adjust_resource_limits() {
+    #[cfg(target_os = "macos")]
+    {
+        /// Our desired limit on the maximum number of file descriptors we can open.
+        ///
+        /// MacOS sets this value to 256, by default, which can interfere with
+        /// normal usage of Warp for users who open lots of tabs.
+        const TARGET_FD_LIMIT: u64 = 2560;
+
+        use nix::sys::resource::{getrlimit, setrlimit, Resource::RLIMIT_NOFILE};
+
+        let (cur_limit, hard_limit) = match getrlimit(RLIMIT_NOFILE) {
+            Ok(val) => val,
+            Err(err) => {
+                log::error!("Failed to retrieve resource limit for number of files: {err:#}");
+                return;
+            }
+        };
+
+        log::info!(
+            "Initial open file descriptor limit is {cur_limit}, with a hard limit of {hard_limit}"
+        );
+        let new_limit = TARGET_FD_LIMIT.min(hard_limit);
+        if cur_limit < new_limit {
+            match setrlimit(RLIMIT_NOFILE, new_limit, hard_limit) {
+                Ok(_) => log::info!("Increased open file descriptor limit to {new_limit}"),
+                Err(err) => log::error!("Failed to increase open file descriptor limit: {err:#}"),
+            }
+        }
+    }
+}