On Sat, 16 May 2026 at 07:26, Janis Papanagnou <[email protected]>
wrote:
<snip>
For context I don't know KornShell and have never used it in anger, I'm
just trying to help you get it highlighted.
I'm not sure what "ksh2020" is supposed to mean or identify . The original
> standard ksh (based on original AT&T ksh) is ksh93 (either "ksh93u+" or the
> maintained version "ksh93u+m" from Martijn Dekker).
>
You can read about the history of ksh2020 on the KornShell wikipedia page.
I suggested using it for testing the highlighting because I assumed,
perhaps incorrectly, that it was the most featureful version. It appears
to have been abandoned.
> It would be inappropriate to require a change in the shebang lines of
> scripts
> to be all changed from "#!/bin/ksh" or "#!/bin/ksh93" to "#!/bin/ksh2020".
>
I didn't implement this configuration method but it seems that version
specific KornShell highlighting is only available via a dedicated shebang
line otherwise a "generic" KornShell highlighting is used. The help states
"Specific shell features are automatically enabled based on the shell
detected from the shebang line ("#! ..."). For KornShell Vim detects
different shell features for mksh, ksh88, ksh93, ksh93u, ksh93v, and
ksh2020."
The short story is that with just `let g:is_kornshell = 1` set in my vimrc
and using Vim 9.1 your parameter expansion and set command examples are not
highlighted correctly but when using Vim 9.2 or later only the set command
is highlighted incorrectly.
So the best course of action is to upgrade to Vim 9.2 or use the current
development version of runtime/syntax/sh.vim that I linked to earlier.
Then you need to determine based on your specific usage whether it's best
to configure the KornShell support via the variable, shebang line, or
filename extension.
<snip>
Regards,
Doug
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