Re: What happened to 'env'?

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On Thu, 2020-10-08 at 08:14 +1100, Cameron Simpson wrote:
> On 07Oct2020 11:07, Patrick O'Callaghan <pocallaghan@xxxxxxxxx> wrote:
> > On Tue, 2020-10-06 at 15:45 -0700, ToddAndMargo via users wrote:
> > > I start all my Raku programs with
> > > 1: #!/usr/bin/env raku
> > 
> > Why? If you aren't adding options to 'env', surely this is the same as
> > using '/usr/bin/bash'.
> 
> No, this is a standard shebang (#!) hack to accomodate differering 
> installation paths. The #! requires a fixed absolute path. So things 
> which are often installed in different places (such as raku above) like 
> /usr/local/bin or /opt/something and accessed via the user's $PATH 
> setting, putting in this line makes the script more portable.

The user's export environment, including the PATH setting, is
automatically included, even if you have no shebang at all:

$ cat test
type python3
echo $PATH
$ chmod+x test
$ ./test
python3 is /usr/bin/python3
/usr/lib64/qt-3.3/bin:/usr/share/Modules/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/home/poc/.local/bin:/home/poc/bin

poc

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