python: workaround private functions

these allow use with Matlab < R2022a where Python isn't available
or isn't working due to Matlab JIT bugs in < R2022a

Author: scivision

+stdlib/create_symlink.m

@@ -27,12 +27,7 @@
     % see example/Filesystem.java for this working in plain Java.
     % see example/javaCreateSymbolicLink.m for a non-working attempt in Matlab.
       if stdlib.has_python()
-        try
-          py.os.symlink(target, link);
-          ok = true;
-        catch e
-          warning(e.identifier, "%s", e.message)
-        end
+        ok = py_create_symlink(target, link);
       elseif stdlib.dotnet_api() >= 6
         % https://learn.microsoft.com/en-us/dotnet/api/system.io.file.createsymboliclink
         try

+stdlib/disk_available.m

@@ -13,14 +13,16 @@
 if ~stdlib.exists(d), return, end
 
 if stdlib.has_python()
-  di = py.shutil.disk_usage(d);
-  f = uint64(int64(di.free)); % int64 first is for Matlab <= R2022a
+  f = py_disk_available(d);
 elseif stdlib.has_dotnet()
   f = System.IO.DriveInfo(stdlib.absolute(d)).AvailableFreeSpace();
   % https://learn.microsoft.com/en-us/dotnet/api/system.io.driveinfo.availablefreespace
 elseif stdlib.has_java()
   f = javaObject("java.io.File", d).getUsableSpace();
-  f = uint64(f);
+end
+
+f = uint64(f);
+
 end
 
 %!assert (disk_available('.') > 0)

+stdlib/disk_capacity.m

@@ -11,16 +11,16 @@
 if ~stdlib.exists(d), return, end
 
 if stdlib.has_python()
-  di = py.shutil.disk_usage(d);
-  f = uint64(int64(di.total)); % int64 first is for Matlab <= R2022a
+  f = py_disk_capacity(d);
 elseif stdlib.has_dotnet()
   f = System.IO.DriveInfo(stdlib.absolute(d)).TotalSize();
   % https://learn.microsoft.com/en-us/dotnet/api/system.io.driveinfo.totalsize
 elseif stdlib.has_java()
   f = javaObject("java.io.File", d).getTotalSpace();
-  f = uint64(f);
 end
 
+f = uint64(f);
+
 end
 
 %!assert (disk_capacity('.') > 0)

+stdlib/get_owner.m

@@ -12,9 +12,7 @@
 
 
 if ~ispc() && stdlib.has_python()
-
-  n = string(py.str(py.pathlib.Path(p).owner()));
-
+  n = py_get_owner(p);
 elseif stdlib.has_java()
 % https://docs.oracle.com/en/java/javase/22/docs/api/java.base/java/nio/file/Files.html#getOwner(java.nio.file.Path,java.nio.file.LinkOption...)
 % https://docs.oracle.com/en/java/javase/22/docs/api/java.base/java/nio/file/LinkOption.html

+stdlib/hard_link_count.m

@@ -13,7 +13,7 @@
 c = [];
 
 if stdlib.has_python()
-  c = uint64(int64(py.os.stat(p).st_nlink)); % int64 first is for Matlab <= R2022a
+  c = py_hard_link_count(p);
 elseif stdlib.isoctave()
   [s, err] = stat(p);
   if err == 0

+stdlib/is_admin.m

@@ -3,22 +3,9 @@
 function y = is_admin()
 
 
-if stdlib.has_python()
-  if isunix()
-    y = py.os.getuid() == 0;
-    return
-  elseif ~isMATLABReleaseOlderThan('R2024a')
-    shell32 = py.ctypes.WinDLL('shell32');
-
-    % this is a key step vs. simply py.ctypes.windll.shell32.IsUserAnAdmin()
-    f = py.getattr(shell32, 'IsUserAnAdmin');
-
-    y = logical(f());
-    return
-  end
-end
-
-if stdlib.isoctave()
+if (isunix() || ~isMATLABReleaseOlderThan('R2024a')) && stdlib.has_python()
+  y = py_is_admin();
+elseif stdlib.isoctave()
   y = getuid() == 0;
 elseif ispc() && stdlib.has_dotnet()
   % com.sun.security.auth.module.NTSystem().getGroupIDs();

+stdlib/is_symlink.m

@@ -15,7 +15,7 @@
       elseif stdlib.has_java()
         ok = java.nio.file.Files.isSymbolicLink(javaPathObject(stdlib.absolute(p)));
       elseif stdlib.has_python()
-        ok = py.pathlib.Path(p).is_symlink();
+        ok = py_is_symlink(p);
       else
         ok = logical.empty;
       end

+stdlib/private/py_create_symlink.m

@@ -0,0 +1,11 @@
+function ok = py_create_symlink(target, link)
+
+try
+  py.os.symlink(target, link);
+  ok = true;
+catch e
+  warning(e.identifier, "%s", e.message)
+  ok = false;
+end
+
+end

+stdlib/private/py_disk_available.m

@@ -0,0 +1,8 @@
+function f = py_disk_available(d)
+
+di = py.shutil.disk_usage(d);
+
+f = int64(di.free);
+% int64 first is for Matlab <= R2022a
+
+end

+stdlib/private/py_disk_capacity.m

@@ -0,0 +1,8 @@
+function f = py_disk_capacity(d)
+
+di = py.shutil.disk_usage(d);
+
+f = int64(di.total);
+% int64 first is for Matlab <= R2022a
+
+end