Re: Bash – am I getting MAD here?

[Johnny Rosenberg]

2016-07-27 20:55 GMT+02:00 Paul Smith <paul at mad-scientist.net>:

> On Wed, 2016-07-27 at 20:48 +0200, Johnny Rosenberg wrote:
> > Having another look at my ToURI function, I'm also wondering if
> > ”export local” is meaningful. Sounds like a contradiction… But I need
> > the export for the perl thing at the end of the function, I don't
> > think it will work otherwise.
>
> You don't need to do that.  Just put the variable before the command
> invocation:
>
>   ToURI () {
>     FileName="$1" perl -MURI::file -e 'print
> URI::file->new($ENV{'FileName'})."\n"'
>   }
>
> In shell syntax you can set an environment variable to be in effect
> only for a given command by putting it on the same command line, before
> the command:
>
>   VAR1=val [VAR2=val ...] command ...
>
> Much safer and more portable (works in all variations of POSIX sh).
>

Oh, I didn't think of that. I use that syntax sometimes for temporary
values of IFS. I should have thought of that. Thanks for the suggestion, it
also makes the function look better…
I tested this and, of course, it works too.

Kind regards

Johnny Rosenberg



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