require scalar non-empty inputs, add functions

add exists(), is_readable(), is_writable(), sys.cpu_load(), sys.ram_free(), sys.ram_total() all using Java internal to Matlab.

require scalar non-empty inputs to simplify internal code.

add several functions, distinguish canonical from resolve, bugfixes

add function fileio.{parent,stem,filename,suffix,join}

distinguish function fileio.canonical() which returns relative path if not exist from fileio.resolve() that always returns absolute path--if not exist, absolute based on cwd.

expanduser: ignore inputs like ~abc

subprocess_run: correct high level interface nargout and improve test

absolute("") = ""

Internals use posix filesep "/" throughout

Test: shortname: test with Matlab exe so it's always present (vs. notepad)

Java-based functions, add normalize

• add normalize() function
• use mostly Java-based internal functions for fileio

remove redundant code

v4.10.1

remove redundant code

improve tests and correctness. Add several stdlib.* aliases

v4.10.0

ci: add R2023a

add sys.wsl* functions

for Windows Subsystem for LInux add functions under stdlib.sys

h5save: add shape checks

to avoid confusing errors, check the shape of "sizeA" vs array size, if given for h5save

work with Matlab >= R2019b

Matlab R2019b is the minimum version because the Matlab syntax dramatically changed for R2019b and we use it everywhere.

works with Matlab >= R2020a, remove copyfile(), add ncvariables(...,group)

*works with Matlab >= R2020a -- CI tests each release from R2020a to R2022b

• remove copyfile()
• enhance internal argument checks,
• add ncvariables(...,group) option

which() enhancements for Windows

stdlib.fileio.which() performs better generally on Windows, where file extension is now optional (.exe is appended and checked also)

h5variables("file.h5", "/not_exist_group") returns empty instead of erroring

some internal cleanup and rearranging