On Sep 20, 2019, at 15:42, Gerben Wierda wrote:
> On 20 Sep 2019, at 18:29, Dr M J Carter wrote:
>
>> On Fri, Sep 20, 2019 at 05:33:02PM +0200, Gerben Wierda wrote:
>>> I’m new to tcl, so maybe this is simple, but I haven’t been able to solve
>>> it.
>>>
>>> startupitem.start "[variant_isset "withdnsserver"] ? "port load
>>> dns-server\n\t" : "" ] port load clamav-server
>>> \tport load apache-solr8
>>> \tport load redis
>>> \tport load dcc
>>> \tport load postfix
>>> \tport load dovecot2
>>> \tport load rspamd
>>> \tport load logrotate"
>>>
>>>
>>> Now, obviously, this doesn’t work because of all the double quotes inside
>>> double quotes.
>>> How do I do this without using variables?
>>
>> Backslash-quote them, thus: "foo \"bar\" baz" -> foo "bar" baz
>>
>> Hope this helps.
>
> Actually, it doesn’t because the result is
>
> 0 ? "port load dns-server
> " : "" ] port load clamav-server
> port load apache-solr8
> port load redis
> port load dcc
>
> and not
>
> port load clamav-server
> port load apache-solr8
> port load redis
> port load dcc
>
> What also doesn’t work is (with a variable):
>
> set startupitemstring [variant_isset "withdnsserver" ? "port load
> dns-server\n\t" : ""]
> append startupitemstring "port load clamav-server
> \tport load apache-solr8
> \tport load redis
> \tport load dcc
> \tport load postfix
> \tport load dovecot2
> \tport load rspamd
> \tport load logrotate"
> startupitem.start "$startupitemstring"
>
> which gets me:
>
> Error: Unable to open port: wrong # args: should be "variant_isset name"
>
> And
>
> set startupitemstring [variant_isset "withdnsserver"] ? "port load
> dns-server\n\t" : ""
>
> gets me:
>
> Error: Unable to open port: wrong # args: should be "set varName ?newValue?"
>
> And
>
> set startupitemstring [[variant_isset "withdnsserver"] ? "port load
> dns-server\n\t" : ""]
>
> gets me:
>
> Error: Unable to open port: invalid command name "0"
>
> Obviously, I do not understand tcl, but I also am unable to find any tcsl
> ternary operator example that uses strings like this.
It looks like to use a ternary operator in Tcl you have to be inside an [expr
...]
