bash source script.sh with exit 0

Question

I use a lot of external files in my scripts.

But I have a problem, that if I source a file with exit in the contents of the file, the script exits from loading and the strings that I want to use are gone .

Example main.sh:

#!/bin/bash

clear;
source /opt/external-svn/config.sh;
echo "$var1 and $var2 and $var3";

Example config.sh:

#!/bin/bash

var1="foo bar is great"
var2="foooo baar is greater"
var3="foooooooo baaaaaar is \
to long"

exit 0

Problem is the multiline var3, so I want to use source for var1 and var2. The following is possible but not nice:

var1=$(cat "/opt/external-svn/config.sh" |awk -F'"' '/^var1/ {print $2}');

This is only work for single line not for var3.

Is there a simple / easy solution ?

update because I'm to stupid to make a correct answer

@Gilles no not working the file in raw is here for suggestions raw.githubusercontent.com/gorgone/temptest/master/config.sh

#!/bin/bash

FILE="/tmp/$(basename $0).$$.tmp"
configsh="/opt/external-svn/config.sh"
grep -vE '^exit' $configsh > $TFILE
source "$TFILE"

exit the mainscript and got echo to screen

@Anthon it's also not working for the my file on github

Update2 found solution

i found the magic ONE i use the idea but its not a generic solution

only for my special case

cat config.sh |sed 's/if [ $# = 0 ]/if [ $# = 1 ]/g' >config.source

so i can source the file

but the best way is to have a generic solution for all files

Answer 1

If you have abc.inc:

x=1
exit 0

and klm.inc:

y=2
exit 0

then if you have combine script:

#!/bin/bash

for fn in abc klm; do
  grep -vE '^exit' $fn.inc > /tmp/xyz.tmp
  source /tmp/xyz.tmp
done

echo x: $x
echo y: $y

you can run combine and get as output:

x: 1
y: 2

This assumes that your exit statement are at the beginning of their lines, you might have to adjust the grep if they are not

Answer 2

You may override exit in your main.sh by declaring a custom exit function at the beginning of main.sh.

#!/bin/bash
# main.sh
exit() { 
   local exit_code="${1-?}"
   test "$exit_code" -ne 0 && builtin exit "$exit_code"
   :
}
clear;
source /opt/external-svn/config.sh;
echo "$var1 and $var2 and $var3";

#unset -f exit; exit 0
builtin exit 0