fix(WSL): Fix parallelism support for WSL systems with enabled systemd (antonbabenko#872)

* chore(_common.sh): Add `WSLInterop-late` file check in `get_cpu_num`

* Fix typo

* pre-commit fixes

* Streamline condition wrapping

* make WSLInterop local var readonly

Co-authored-by: Maksym Vlasov <[email protected]>

* Also check `/run/WSL` file does not exist

---------

Co-authored-by: pre-commit <[email protected]>
Co-authored-by: Maksym Vlasov <[email protected]>

Author: 3 people

hooks/_common.sh

@@ -206,8 +206,10 @@ function common::get_cpu_num {
 
   local cpu_quota cpu_period cpu_num
 
+  local -r wslinterop_path="/proc/sys/fs/binfmt_misc/WSLInterop"
+
   if [[ -f /sys/fs/cgroup/cpu/cpu.cfs_quota_us &&
-    ! -f /proc/sys/fs/binfmt_misc/WSLInterop ]]; then # WSL have cfs_quota_us, but WSL should be checked as usual Linux host
+    (! -f "${wslinterop_path}" && ! -f "${wslinterop_path}-late" && ! -f "/run/WSL") ]]; then # WSL has cfs_quota_us, but WSL should be checked as usual Linux host
     # Inside K8s pod or DinD in K8s
     cpu_quota=$(< /sys/fs/cgroup/cpu/cpu.cfs_quota_us)
     cpu_period=$(cat /sys/fs/cgroup/cpu/cpu.cfs_period_us 2> /dev/null || echo "$cpu_quota")