feat(tvix/store): fix ctrl-c handling on mount command r/6557

This enables the tokio `signal` feature, and registers a ctrl_c signal
handler, which will use the unmount handle to unmount in case a ctrl-c
signal is received.

This avoids having disconnected mountpoints when Ctrl-C'ing a
`tvix-store mount` invocation.

In case the filesystem is unmounted externally (via `umount /path/to/
mountpoint`), the future is waiting for the signal is never resolved and
the task is stopped.

Change-Id: I149f705a6cb50188177f2a6c6a5fcd77218e2a3f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9218
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI

1 files changed, 25 insertions, 2 deletions

diff --git a/tvix/Cargo.nix b/tvix/Cargo.nix
index 750dee2bb2..4089008aaa 100644
--- a/tvix/Cargo.nix
+++ b/tvix/Cargo.nix
@@ -6092,6 +6092,23 @@ rec {
           "loom" = [ "dep:loom" ];
         };
       };
+      "signal-hook-registry" = rec {
+        crateName = "signal-hook-registry";
+        version = "1.4.1";
+        edition = "2015";
+        sha256 = "18crkkw5k82bvcx088xlf5g4n3772m24qhzgfan80nda7d3rn8nq";
+        authors = [
+          "Michal 'vorner' Vaner <vorner@vorner.cz>"
+          "Masaki Hara <ackie.h.gmai@gmail.com>"
+        ];
+        dependencies = [
+          {
+            name = "libc";
+            packageId = "libc";
+          }
+        ];
+
+      };
       "slab" = rec {
         crateName = "slab";
         version = "0.4.8";
@@ -6925,6 +6942,12 @@ rec {
             packageId = "pin-project-lite";
           }
           {
+            name = "signal-hook-registry";
+            packageId = "signal-hook-registry";
+            optional = true;
+            target = { target, features }: (target."unix" or false);
+          }
+          {
             name = "socket2";
             packageId = "socket2";
             optional = true;
@@ -6987,7 +7010,7 @@ rec {
           "tracing" = [ "dep:tracing" ];
           "windows-sys" = [ "dep:windows-sys" ];
         };
-        resolvedDefaultFeatures = [ "bytes" "default" "io-std" "io-util" "libc" "macros" "mio" "net" "num_cpus" "rt" "rt-multi-thread" "socket2" "sync" "time" "tokio-macros" "windows-sys" ];
+        resolvedDefaultFeatures = [ "bytes" "default" "io-std" "io-util" "libc" "macros" "mio" "net" "num_cpus" "rt" "rt-multi-thread" "signal" "signal-hook-registry" "socket2" "sync" "time" "tokio-macros" "windows-sys" ];
       };
       "tokio-io-timeout" = rec {
         crateName = "tokio-io-timeout";
@@ -8363,7 +8386,7 @@ rec {
           {
             name = "tokio";
             packageId = "tokio";
-            features = [ "rt-multi-thread" "net" ];
+            features = [ "net" "rt-multi-thread" "signal" ];
           }
           {
             name = "tokio-stream";