Suboptimal failure modes for markdown-open and markdown commands

[phst]

Expected Behavior

The commands markdown-open and markdown should provide a meaningful error message when markdown-open-command and markdown-command fail or don't exist, respectively.

Actual Behavior

Both commands silently do nothing if the external subprocess fails. In addition, markdown silently does nothing if the program file doesn't exist.

Steps to Reproduce

In a Markdown buffer:

(let ((markdown-command "/bin/false")) (markdown))
(let ((markdown-command "/does/not/exist")) (markdown))
(let ((markdown-open-command "/bin/false")) (markdown-open))

Software Versions

• Markdown Mode: 2.3
• Emacs: 26.0.90
• OS: Debian testing

[jrblevin]

Thanks, I agree!