Propagate values in shell script

Question

I have a simple script that uses CAPDEPTH like a count variable and calls some tests for each value.

#!/bin/bash
# SCRIPT ONE
CAPDEPTH=1
...
while [ $CAPDEPTH -lt 11 ];
do
    echo "cap depth - $CAPDEPTH"
    make test-all-basics
    let CAPDEPTH=CAPDEPTH+1
done

And in line

eval "make test-all-basics"

It will do multiple calls to another shell script which I also want to make dependent on value of CAPDEPTH. Here are couple of lines from that script.

# SCRIPT TWO
...
R_binary="${R_HOME}/bin/exec${R_ARCH}/R"
capture_arg="--tracedir $(CAPDEPTH)"
...

My question is how to get the value of CAPDETH propagated from SCRIPT ONE to SCRIPT TWO. Is that even possible? I've tried export of the variable CAPDEPTH in both scripts, but does not seems to work.

Answer 1

#!/bin/bash
# SCRIPT ONE
CAPDEPTH=1
...
while [ $CAPDEPTH -lt 11 ]; do
    echo "cap depth - $CAPDEPTH"
    export CAPDEPTH # Makes it so that any child process inherits the variable CAPDEPTH and anything it contains.   
    make test-all-basics
    let CAPDEPTH++ # Increments CAPDEPTH by +1
done


# SCRIPT TWO
...
R_binary="${R_HOME}/bin/exec${R_ARCH}/R"
capture_arg="--tracedir $CAPDEPTH"
...

Answer 2

Inside script one use,

export CADEPTH=....
let CADEPTH=...
echo $CADEPTH

and inside script two, do:

source script1

and then,

echo $CADEPTH