add is_writable, is_readable

add exists()

Author: scivision

+stdlib/+fileio/exists.m

@@ -0,0 +1,12 @@
+function ok = exists(p)
+%% exists does path exist
+% https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/io/File.html#exists()
+
+arguments
+  p (1,1) string
+end
+
+
+ok = java.io.File(p).exists();
+
+end

+stdlib/+fileio/is_readable.m

@@ -0,0 +1,17 @@
+function ok = is_readable(file)
+%% is_readable is file readable
+% https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/nio/file/Files.html#isReadable(java.nio.file.Path)
+
+arguments
+  file string {mustBeScalarOrEmpty}
+end
+
+if isempty(file)
+  ok = logical.empty;
+  return
+end
+
+
+ok = java.nio.file.Files.isReadable(java.io.File(stdlib.fileio.absolute_path(file)).toPath());
+
+end

+stdlib/+fileio/is_writable.m

@@ -0,0 +1,17 @@
+function ok = is_writable(file)
+%% is_writable is file writable
+% https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/nio/file/Files.html#isWritable(java.nio.file.Path)
+
+arguments
+  file string {mustBeScalarOrEmpty}
+end
+
+if isempty(file)
+  ok = logical.empty;
+  return
+end
+
+
+ok = java.nio.file.Files.isWritable(java.io.File(stdlib.fileio.absolute_path(file)).toPath());
+
+end

+stdlib/exists.m

@@ -0,0 +1,10 @@
+function ok = exists(p)
+%% exists does path exist
+
+arguments
+  p (1,1) string
+end
+
+ok = stdlib.fileio.exists(p);
+
+end

+stdlib/is_readable.m

@@ -0,0 +1,10 @@
+function ok = is_readable(p)
+%% is_readable() returns true if the file at path p is readable
+
+arguments
+  p (1,1) string
+end
+
+ok = stdlib.fileio.is_readable(p);
+
+end

+stdlib/is_writable.m

@@ -0,0 +1,10 @@
+function ok = is_writable(p)
+%% is_writable() returns true if the file at path p is writable
+
+arguments
+  p (1,1) string
+end
+
+ok = stdlib.fileio.is_writable(p);
+
+end

test/TestFileImpure.m

@@ -35,7 +35,7 @@ function test_is_readable(tc)
 function test_is_writable(tc)
 
 tc.verifyTrue(stdlib.is_writable(pwd))
-tc.verifyFalse(stdlib.is_writable(matlabroot))
+% tc.verifyFalse(stdlib.is_writable(matlabroot))  % on CI this can be writable!
 tc.verifyFalse(stdlib.is_writable("not-exists"))
 
 end