ci: run windows tests with a single worker

Author: avik-pal

lib/NonlinearSolveFirstOrder/test/runtests.jl

@@ -5,7 +5,9 @@ using ReTestItems, NonlinearSolveFirstOrder, Hwloc, InteractiveUtils, Pkg
 const GROUP = lowercase(get(ENV, "GROUP", "All"))
 
 const RETESTITEMS_NWORKERS = parse(
-    Int, get(ENV, "RETESTITEMS_NWORKERS", string(min(Hwloc.num_physical_cores(), 4)))
+    Int, get(ENV, "RETESTITEMS_NWORKERS",
+        string(min(ifelse(Sys.iswindows(), 0, Hwloc.num_physical_cores()), 4))
+    )
 )
 const RETESTITEMS_NWORKER_THREADS = parse(Int,
     get(

lib/NonlinearSolveQuasiNewton/test/runtests.jl

@@ -5,7 +5,9 @@ using ReTestItems, NonlinearSolveQuasiNewton, Hwloc, InteractiveUtils, Pkg
 const GROUP = lowercase(get(ENV, "GROUP", "All"))
 
 const RETESTITEMS_NWORKERS = parse(
-    Int, get(ENV, "RETESTITEMS_NWORKERS", string(min(Hwloc.num_physical_cores(), 4)))
+    Int, get(ENV, "RETESTITEMS_NWORKERS",
+        string(min(ifelse(Sys.iswindows(), 0, Hwloc.num_physical_cores()), 4))
+    )
 )
 const RETESTITEMS_NWORKER_THREADS = parse(Int,
     get(

lib/NonlinearSolveSpectralMethods/test/runtests.jl

@@ -5,7 +5,9 @@ using ReTestItems, NonlinearSolveSpectralMethods, Hwloc, InteractiveUtils, Pkg
 const GROUP = lowercase(get(ENV, "GROUP", "All"))
 
 const RETESTITEMS_NWORKERS = parse(
-    Int, get(ENV, "RETESTITEMS_NWORKERS", string(min(Hwloc.num_physical_cores(), 4)))
+    Int, get(ENV, "RETESTITEMS_NWORKERS",
+        string(min(ifelse(Sys.iswindows(), 0, Hwloc.num_physical_cores()), 4))
+    )
 )
 const RETESTITEMS_NWORKER_THREADS = parse(Int,
     get(

test/runtests.jl

@@ -10,7 +10,9 @@ const EXTRA_PKGS = Pkg.PackageSpec[]
 length(EXTRA_PKGS) ≥ 1 && Pkg.add(EXTRA_PKGS)
 
 const RETESTITEMS_NWORKERS = parse(
-    Int, get(ENV, "RETESTITEMS_NWORKERS", string(min(Hwloc.num_physical_cores(), 4)))
+    Int, get(ENV, "RETESTITEMS_NWORKERS",
+        string(min(ifelse(Sys.iswindows(), 0, Hwloc.num_physical_cores()), 4))
+    )
 )
 const RETESTITEMS_NWORKER_THREADS = parse(Int,
     get(