Question

#!/bin/bash

shopt -s nullglob
eval="c:cd(\\\"src/\\\"),"

for f in src/*.erl
do
  filename=`basename "$f"`
  eval=${eval}" c:c(\\\"$filename\\\"),"
done

eval=${eval}" c:q()."
echo erl -eval "\""${eval}"\""
erl -eval "\""${eval}"\""

Here, if i copy echo output and run it from command line – its working, but last line failed( I have tested different approaches with quotes and escape chars, but unsuccessfully.

Answer 1

You don’t need the backslashes to be part of the string you’re building (it’s all quoted anyway), and you don’t need the extra double quotes when calling erl -eval:

#!/bin/bash

shopt -s nullglob
eval="c:cd(\"src/\"),"

for f in src/*.erl
do
  filename=`basename "$f"`
  eval=${eval}" c:c(\"$filename\"),"
done

eval=${eval}" c:q()."
echo erl -eval "\""${eval}"\""
erl -eval "${eval}"