{get,set}_permissions: simpilfy, streamline

Author: scivision

+stdlib/+legacy/private/file_attributes.m renamed to +stdlib/+legacy/file_attributes.m

@@ -11,7 +11,7 @@
 
 if ~isfile(file), return, end
 
-a = file_attributes(file);
+a = stdlib.legacy.file_attributes(file);
 y = a.UserExecute || a.GroupExecute || a.OtherExecute;
 
 end

+stdlib/+legacy/get_permissions.m

@@ -4,7 +4,7 @@
 end
 
 if stdlib.exists(file)
-  a = file_attributes(file);
+  a = stdlib.legacy.file_attributes(file);
   y = a.UserRead || a.GroupRead || a.OtherRead;
 else
   y = false;

+stdlib/+legacy/is_exe.m

@@ -4,7 +4,7 @@
 end
 
 if stdlib.exists(file)
-  a = file_attributes(file);
+  a = stdlib.legacy.file_attributes(file);
   y = a.UserWrite || a.GroupWrite || a.OtherWrite;
 else
   y = false;

+stdlib/+legacy/is_readable.m

@@ -102,12 +102,6 @@
           pyv = stdlib.python_version();
           if any(pyv(1:2) < [3, 12]), continue, end
       end
-    case 'native'
-
-      switch functionName
-        case {'get_permissions', 'set_permissions'}
-          if stdlib.matlabOlderThan('R2025a'), continue, end
-      end
   end
 
   if ~isempty(which(sprintf('%s.%s.%s', self.namespace, m, functionName)))

+stdlib/+legacy/is_writable.m

@@ -4,19 +4,30 @@
 %
 %%% inputs
 % * file: path to check
-% * backend: backend to use
 %%% Outputs
 % * p: permissions string
 % * b: backend used
 
-function [perm, b] = get_permissions(file, backend)
+function [perm, b] = get_permissions(file)
 arguments
   file (1,1) string
-  backend (1,:) string = ["native", "legacy"]
 end
 
-o = stdlib.Backend(mfilename(), backend);
-perm = o.func(file);
-b = o.backend;
+perm = '';
+b = '';
+
+if stdlib.exists(file)
+  try
+    perm = perm2char(filePermissions(file));
+    b = 'native';
+  catch e
+    if e.identifier ~= "MATLAB:UndefinedFunction"
+      rethrow(e)
+    end
+
+    perm = perm2char(stdlib.legacy.file_attributes(file));
+    b = 'legacy';
+  end
+end
 
 end

+stdlib/+native/get_permissions.m

@@ -5,23 +5,28 @@
 % * readable   (-1 remove read permission,    0 no change, 1 add read permission)
 % * writable   (-1 remove write permission,   0 no change, 1 add write permission)
 % * executable (-1 remove execute permission, 0 no change, 1 add execute permission)
-% * backend: backend to use
 %%% Outputs
 % * ok (1,1) logical
 % * b: backend used
 
-function [ok, b] = set_permissions(file, readable, writable, executable, backend)
+function [ok, b] = set_permissions(file, readable, writable, executable)
 arguments
   file (1,1) string
   readable (1,1) {mustBeInteger}
   writable (1,1) {mustBeInteger}
   executable (1,1) {mustBeInteger}
-  backend (1,:) string = ["native", "legacy"]
 end
 
-o = stdlib.Backend(mfilename(), backend);
+try
+  ok = stdlib.native.set_permissions(file, readable, writable, executable);
+  b = 'native';
+catch e
+  if e.identifier ~= "MATLAB:UndefinedFunction"
+    rethrow(e)
+  end
 
-ok = o.func(file, readable, writable, executable);
-b = o.backend;
+  ok = stdlib.legacy.set_permissions(file, readable, writable, executable);
+  b = 'legacy';
+end
 
 end