bug#57752: 28.1.91; emacsclient-mail.desktop doesn't work for me

[Max Nikulin]

On 13/09/2022 20:29, Damien Cassou wrote:
> Lars Ingebrigtsen writes:
> > I'd prefer to have a .desktop file that works without any helper
> > scripts.   Can't the emacsclient-mail.desktop file be rewritten to not
> > use quoting here?
>
> This is maybe possible but I haven't found a way. Moreover, the
> constraints that "Field codes must not be used inside a quoted argument"
> makes things more complex.

It is possible to pass %u to shell using positional parameters:

    sh -c 'echo "$1"' demo ARGUMENT

However POSIX shell is not enough to escape double quote and backslash 
inside %u for elisp. BASH allows to perform substitutions during 
variable expansion. The idea is the following (it needs more backslashes 
to conform XDG spec):

bash -c 'e=${1//\\/\\\\}; e=${e///\"/\\\"}; emacsclient 
--alternate-editor= --display="$DISPLAY" --eval=\(message-mailto\ 
"\"$e\""\)' emacsclient-mailto %u