add try-catch and warning feedback

Author: scivision

+stdlib/+python/create_symlink.m

@@ -4,7 +4,7 @@
   py.os.symlink(target, link);
   ok = true;
 catch e
-  warning(e.identifier, "%s", e.message)
+  warning(e.identifier, "create_symlink(%s, %s) failed: %s", target, link, e.message);
   ok = false;
 end
 

+stdlib/+python/device.m

@@ -1,6 +1,11 @@
 function i = device(p)
 
-i = uint64(int64(py.os.stat(p).st_dev));
-% int64 first is for Matlab <= R2022a
+try
+  i = uint64(int64(py.os.stat(p).st_dev));
+  % int64 first is for Matlab <= R2022a
+catch e
+  warning(e.identifier, "device(%s) failed: %s", p, e.message)
+  i = [];
+end
 
 end

+stdlib/+python/disk_available.m

@@ -1,8 +1,12 @@
 function f = disk_available(d)
 
-di = py.shutil.disk_usage(d);
-
-f = int64(di.free);
-% int64 first is for Matlab <= R2022a
+try
+  di = py.shutil.disk_usage(d);
+  f = int64(di.free);
+  % int64 first is for Matlab <= R2022a
+catch e
+  warning(e.identifier, "disk_available(%s) failed: %s", d, e.message);
+  f = [];
+end
 
 end

+stdlib/+python/disk_capacity.m

@@ -1,8 +1,12 @@
 function f = disk_capacity(d)
 
-di = py.shutil.disk_usage(d);
-
-f = int64(di.total);
-% int64 first is for Matlab <= R2022a
+try
+  di = py.shutil.disk_usage(d);
+  f = int64(di.total);
+  % int64 first is for Matlab <= R2022a
+catch e
+  warning(e.identifier, "disk_capacity(%s) failed: %s", d, e.message);
+  f = [];
+end
 
 end

+stdlib/+python/get_hostname.m

@@ -1,5 +1,8 @@
 function n = get_hostname()
 
-n = py.socket.gethostname();
-
+try
+  n = char(py.socket.gethostname());
+catch e
+  warning(e.identifier, "get_hostname failed: %s", e.message);
+  n = '';
 end

+stdlib/+python/is_char_device.m

@@ -0,0 +1,8 @@
+function y = is_char_device(p)
+
+try
+  y = py.pathlib.Path(p).is_char_device();
+catch e
+  warning(e.identifier, "Python is_char_device failed: %s", e.message);
+  y = false;
+end

+stdlib/+python/is_symlink.m

@@ -1,5 +1,10 @@
 function y = is_symlink(p)
 
-y = py.pathlib.Path(p).is_symlink();
+try
+  y = py.pathlib.Path(p).is_symlink();
+catch e
+  warning(e.identifier, "Python is_symlink failed: %s", e.message);
+  y = false;
+end
 
 end

+stdlib/+python/read_symlink.m

@@ -1,9 +1,14 @@
 function r = read_symlink(p)
 
 % https://docs.python.org/3/library/pathlib.html#pathlib.Path.readlink
-r = string(py.os.readlink(p));
-if ispc() && startsWith(r, '\\?\')
-  r = extractAfter(r, '\\?\');
+try
+  r = string(py.os.readlink(p));
+  if ispc() && startsWith(r, '\\?\')
+    r = extractAfter(r, '\\?\');
+  end
+catch e
+  warning(e.identifier, "read_symlink(%s) failed: %s", p, e.message);
+  r = string.empty;
 end
 
 end

+stdlib/+python/set_modtime.m

@@ -5,7 +5,7 @@
   py.os.utime(p, py.tuple([s.st_atime, utc]));
   ok = true;
 catch e
-  warning(e.identifier, "%s", e.message)
+  warning(e.identifier, "set_modtime(%s, %s) failed: %s", p, utc, e.message);
   ok = false;
 end
 

+stdlib/+sys/read_symlink.m

@@ -0,0 +1,16 @@
+function r = read_symlink(p)
+
+r = string.empty;
+
+if isunix()
+  cmd = sprintf('readlink -fn %s', p);
+else
+  cmd = sprintf('pwsh -command "(Get-Item -Path %s).Target"', p);
+end
+
+[s, m] = system(cmd);
+if s == 0
+  r = strip(string(m));
+end
+
+end