add is_mount()

Author: scivision

+stdlib/+python/is_mount.m

@@ -0,0 +1,14 @@
+%% PYTHON.IS_MOUNT is path a mount point
+%
+% https://docs.python.org/3/library/os.path.html#os.path.ismount
+
+function y = is_mount(filepath)
+
+try
+  y = py.os.path.ismount(filepath);
+catch e
+  warning(e.identifier, "Python is_mount failed: %s", e.message);
+  y = false;
+end
+
+end

+stdlib/+sys/is_mount.m

@@ -0,0 +1,26 @@
+function y = is_mount(filepath)
+
+
+if ispc()
+  if any(ismember(filepath, ["/", "\"])) || ...
+      (endsWith(filepath, ["/", "\"]) && isfolder(filepath) && filepath == stdlib.root(filepath))
+    y = true; 
+    return
+  end
+  cmd = strcat('pwsh -c "(Get-Item -Path ''', filepath, ''').Attributes.ToString().Contains(''ReparsePoint'')"');
+elseif ismac()
+  cmd = "[ $(stat -f %d " + filepath + ") != $(stat -f %d " + stdlib.parent(filepath) + ")]";
+else
+  cmd = "mountpoint -q " + filepath;
+end
+
+[s, m] = system(cmd);
+
+if ispc()
+  y = s == 0 && m == "True";
+else 
+  y = s == 0;
+end
+
+
+end

+stdlib/is_mount.m

@@ -0,0 +1,17 @@
+%% IS_MOUNT is filepath a mount path
+% 
+% Examples:
+%
+% * Windows: is_mount("c:") false;  is_mount("C:\") true
+% * Linux, macOS, Windows: is_mount("/") true
+
+function y = is_mount(filepath, method)
+arguments 
+  filepath {mustBeTextScalar}
+  method (1,:) string = ["python", "sys"]
+end
+
+fun = choose_method(method, "is_mount");
+y = fun(filepath);
+
+end

test/TestDisk.m

@@ -14,6 +14,7 @@
 hl_fun = {'java', 'python'}
 fst_fun = {'sys', 'dotnet', 'java', 'python'}
 is_remove = {'dotnet', 'sys'}
+py_sys = {'python', 'sys'}
 end
 
 methods(TestClassSetup)
@@ -55,6 +56,27 @@ function test_is_removable(tc, is_remove)
 end
 
 
+function test_is_mount(tc, py_sys)
+try
+  y = stdlib.is_mount(pwd(), py_sys);
+catch e
+  tc.verifyEqual(e.identifier, 'stdlib:choose_method:NameError', e.message)
+  return
+end
+
+tc.verifyClass(y, 'logical')
+tc.verifyTrue(stdlib.is_mount("/", py_sys))
+
+if ispc()
+  sd = getenv("SystemDrive");
+  tc.assertEqual(sd, stdlib.root_name(sd), sd)
+  tc.verifyFalse(stdlib.is_mount(sd, py_sys), sd)
+  tc.verifyTrue(stdlib.is_mount(sd + "/", py_sys), sd)
+  tc.verifyTrue(stdlib.is_mount(sd + "\", py_sys), sd)
+end
+end
+
+
 function test_hard_link_count(tc, hl_fun)
 fname = "hard_link_count";
 n = "stdlib." + hl_fun + "." + fname;