[GTALUG] Command doesn't work in script but works on command line?

[mwilson at Vex.Net]

>From this, and what Hugh said about separate context:
I have a script file called path-here. The text is

#!/bin/bash
export PATH=$PATH:$(realpath .)

When I run it as a command, it apparently modifies the environment of a
sub-shell, and that environment gets thrown away when the sub-shell exits.
 To get the effect I want, I type

. path-here

which, I think, runs in the same bash instance that I'm typing commands
into, so the change to PATH is effective.

So would typing

. simple-script

(whatever the name of the simple script really is) get you what you want?

> I'm not sure I am clear here what you want me to try. I tried putting
> the command in a function in the script as below but it still didn't work.
>
> On 2021-11-06 9:20 a.m., Dave Collier-Brown via talk wrote:
>>
>> Does it perhaps only apply in the process that issues the command? 
>> That would make it apply when run from the command-line, and (appear
>> to) fail when you run it in a subshell, which is what happens when you
>> call a script.
>>
>> The man page doesn't say, so try making it a shell function,
>>
>> alsa_me() {
>>  Â Â Â  alsa_out -j secondInterface -d hw:3 -c 6
>> }
>>
>> and then call that from the command-line.
>>
> The thing is I want to avoid using the command line. I want a user to
> just double click the file to run it.
> Jim
>>
>>
>> On 2021-11-06 08:44, Jim Ruxton via talk wrote:
>>> Ok, just added the path /usr/bin to the command but it didn't help.
>>> Still a mystery?
>>>
>>> Jim
>>>
>>> On 2021-11-06 8:37 a.m., James Knott via talk wrote:
>>>> On 2021-11-06 8:25 a.m., Jim Ruxton via talk wrote:
>>>>>
>>>>>
>>>>> I'm having trouble with a simple script. It adds a second
>>>>> sounccard. This command works on the command line but not in a
>>>>> script. Any ideas why?
>>>>
>>>> Did you specify the full path to the command in the script?
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>> David Collier-Brown,         | Always do right. This will gratify
>> System Programmer and Author | some people and astonish the rest
>> dave.collier-brown at indexexchange.com  |              -- Mark Twain
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