Bash script - pass output from source script to variable

Question

I got the bash starter script, that source unique tools from some env file. Then I proceed to run python script that will use those.

output=$(source $envPath 2>&1) give me text output in output variable, but in the future when I finally run python script (from that bash script) I do not have access to sourced tools from .env file.

It works fine for single source $envPath, the python script got access, but I cant read the output of that source.

output=""
# source $envPath >$output # doesnt work
# source $envPath | $output # doesnt work
echo $output

I need the output to verify it and execute correct action

I can but it can give different results depending if it has been sourced already before/ for the first time or gave error and I want to support all the cases differently — Piodo
– Piodo, Commented Sep 18, 2018 at 9:44

guidot · Accepted Answer · 2018-09-18 09:53:17Z

1

This question is not python-related in my opinion, but a pure shell-syntax issue.

export output=`source $envpath`

should do.

answered Sep 18, 2018 at 9:53

guidot

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2 Comments

Piodo Over a year ago

Executes, but the same problem as with output=$(source $envPath 2>&1). When it runs to python script the python does not have access to tools that should be sourced

guidot Over a year ago

@Piodo: I find this distiction (between different times, when tools are available and when not) not sufficiently covered in your question. If the shell script only runs, when the tools are no longer accessible an intermediate file may help. But simply running the script when the tools are still available and preserving the environment variable should also succeed.

choroba · Accepted Answer · 2018-09-18 09:54:08Z

1

Save the output to a temp file, from which you can populate a variable:

1.sh

#!/bin/bash
tmp=$(mktemp)

. 2.sh > "$tmp"
output=$(< "$tmp")
echo "$output"
echo "$EXPORTED"

2.sh

echo 123
EXPORTED=1

Output of 1.sh:

123
1

answered Sep 18, 2018 at 9:54

choroba

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1 Comment

Piodo Over a year ago

I thought about solution like this. As far I wont find better solution, I will use this as workaround. Thanks

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