fix: run! errors if output is a standalone file

[storopoli]

Right now the run! function errors on the README instructions.

The idea here is to add an if to check it the dirname of the joinpath(pwd(), output) is a dir instead of throwing error straight away.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (ce494f5) 83.98% compared to head (958b76d) 83.51%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/server.jl	33.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #4      +/-   ##
==========================================
- Coverage   83.98%   83.51%   -0.47%     
==========================================
  Files           5        5              
  Lines         356      358       +2     
==========================================
  Hits          299      299              
- Misses         57       59       +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[MichaelHatherly]

Thanks @storopoli. A test case to cover this one would be great too.

[MichaelHatherly]

Suggested change

	function _check_output_dst(s::AbstractString)
	dir = dirname(s)
	isdir(dir) || throw(ArgumentError("directory does not exist: $(dir)"))
	if !isdir(dir)
	_dir = dirname(joinpath(pwd(), s))
	isdir(_dir) || throw(ArgumentError("directory does not exist: $(dir)"))
	end
	return nothing
	end
	function _check_output_dst(s::AbstractString)
	s = abspath(s)
	dir = dirname(s)
	isdir(dir) || throw(ArgumentError("directory does not exist: $(dir)"))
	return nothing
	end

is probably sufficient.

[MichaelHatherly]

Replaced by #5, thanks @storopoli.