Question

I’ve got bunch of shell scripts that used some command and other tools.

So is there a way I can list all programs that the shell scripts are using ?
Kind of way to retrieve dependencies from the source code.

Answer 1

Uses sed to translate pipes and $( to newlines, then uses awk to output the first word of a line if it might be a command. The pipes into which to find potiential command words in the PATH:

sed 's/|\|\$(/\n/g' FILENAME | 
awk '$1~/^#/ {next} $1~/=/ {next} /^[[:space:]]*$/ {next} {print $1}' | 
sort -u | 
xargs which 2>/dev/null