disable dotnet.device due to instability

Author: scivision

+stdlib/+dotnet/device.m

@@ -1,5 +1,7 @@
 function i = device(path)
 
+% this has been not so stable, so we disabled it and leave it here for reference.
+
 i = [];
 
 h = NET.addAssembly('System.Management');

+stdlib/+dotnet/ram_total.m

@@ -1,5 +1,5 @@
 function bytes = ram_total()
   % .NET is 2-3x faster than Java for this
   % https://learn.microsoft.com/en-us/dotnet/api/system.gcmemoryinfo.totalavailablememorybytes
-  bytes = System.GC.GetGCMemoryInfo().TotalAvailableMemoryBytes;
+  bytes = uint64(System.GC.GetGCMemoryInfo().TotalAvailableMemoryBytes);
 end

+stdlib/+python/disk_capacity.m

@@ -6,7 +6,9 @@
   % int64 first is for Matlab <= R2022a
 catch e
   warning(e.identifier, "disk_capacity(%s) failed: %s", d, e.message);
-  f = [];
+  f = 0;
 end
 
+f = uint64(f);
+
 end

+stdlib/+sys/disk_capacity.m

@@ -11,9 +11,11 @@
 
 [s, t] = system(cmd);
 if s == 0
-  t = strip(t);
+  t = str2double(t);
 else
-  t = "";
+  t = 0;
 end
 
+t = uint64(t);
+
 end

+stdlib/device.m

@@ -9,8 +9,6 @@
 
 if stdlib.has_python()
   i = stdlib.python.device(p);
-elseif ispc() && stdlib.has_dotnet()
-  i = stdlib.dotnet.device(p);
 elseif isunix() && stdlib.java_api() >= 11
   % Java 1.8 is buggy in some corner cases, so we require at least 11.
   i = stdlib.java.device(p);

+stdlib/disk_capacity.m

@@ -8,13 +8,13 @@
 end
 
 f = uint64(0);
+
 if ~stdlib.exists(d), return, end
 
 if stdlib.has_dotnet()
-  f = System.IO.DriveInfo(stdlib.absolute(d)).TotalSize();
-  % https://learn.microsoft.com/en-us/dotnet/api/system.io.driveinfo.totalsize
+  f = stdlib.dotnet.disk_capacity(d);
 elseif stdlib.has_java()
-  f = javaObject("java.io.File", d).getTotalSpace();
+  f = stdlib.java.disk_capacity(d);
 elseif stdlib.has_python()
   f = stdlib.python.disk_capacity(d);
 end

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-22.04, windows-2022]
-        release: [R2021a, R2021b, R2022a, R2022b, R2023a, R2023b, R2024a, R2024b, R2025a]
+        release: [R2022a, R2022b, R2023a, R2023b, R2024a, R2024b, R2025a]
 # on Linux, even R2025a needs GCC 10.x and hence Github Actions runner ubuntu-22.04.
 # R2021a...R2022a officially need Ubuntu 20.04,
 # which is no longer available on Github Actions
@@ -76,3 +76,28 @@ jobs:
     - name: MEX tests
       if: ${{ matrix.release >= 'R2023b' }}
       uses: ./.github/workflows/composite-mex
+
+
+  matlab-older-than-R2022a:
+    timeout-minutes: 15
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [ubuntu-22.04]
+        release: [R2021a, R2021b]
+
+    name: ${{ matrix.release }}-${{ matrix.os }}
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: ./.github/workflows/composite-install-matlab
+
+    - name: Matlab tell External Language Interface versions
+      uses: matlab-actions/run-command@v2
+      with:
+        command: stdlib.platform_tell()
+
+    - name: Non-MEX tests
+      uses: ./.github/workflows/composite-nomex