I have a Temp.bash script:

#!/bin/bash

shopt -s extglob
echo * .!(|.|lyx|ddd|lftp|lyx|qt)

If I do

bash -n Temp.bash

the shopt command is ignored, so the following line becomes an error rather than
being properly expanded. I have to do

bash -n -O extglob Temp.bash

A more complicated script may turn various shopt switches on and off at various
points in the script, so fixing the switch position at invocation may not solve
the problem. Is there a simple work around, or is this simply a limitation that
one has to live with? My end goal is simply to check the sanity of syntax
without any side effects.

Thanks.

Fred

2007-07-29, 09:50(-04), Fred Ma:
> I have a Temp.bash script:
>
> #!/bin/bash
>
> shopt -s extglob
> echo * .!(|.|lyx|ddd|lftp|lyx|qt)
>
> If I do
>
> bash -n Temp.bash
>
> the shopt command is ignored, so the following line becomes an error rather than
> being properly expanded. I have to do
[...]

That's what bash -n does. It does *n*ot run the commands, just
parses them.

--
Stéphane

Stephane CHAZELAS wrote:
> 2007-07-29, 09:50(-04), Fred Ma:
>> I have a Temp.bash script:
>>
>> #!/bin/bash
>>
>> shopt -s extglob
>> echo * .!(|.|lyx|ddd|lftp|lyx|qt)
>>
>> If I do
>>
>> bash -n Temp.bash
>>
>> the shopt command is ignored, so the following line becomes an error rather than
>> being properly expanded. I have to do
> [...]
>
> That's what bash -n does. It does *n*ot run the commands, just
> parses them.

OK, thanks.