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spp

preprocess shell files. spp mostly follows the c-preprocessor syntax.

Usage

First you need to annotate your shell files and use the recognised syntax for spp to find what you intend to substitute. See annotated example further below. Any comment/definition after the endif directive is ignored.

spp -Dyacc -DTEST_ARG_0 -Dlorem_ipsum test1.sh test2.sh

#!/bin/bash

print_startup_message(){
#-- @ifdef TEST_ARG_0
  echo "Why, hello there!"
#-- @elif yacc || bison
  echo "Welcome back!"
#-- @else
  :
#-- @endif TEST_ARG_0
#-- @ifdef lorem_ipsum && dolor_sit
  wget $CPE_IPADDR/userconfig.yaml
#-- @endif
}
print_startup_message

Building

Install required packages

sudo apt install cmake libgtest-dev shellcheck g++

Run ./build from the root of this project for help on how to build. It is a helper script. Alternatively, you may just call cmake, but take care not to call it in the project root, otherwise cmake files will be scattered about, which is annoying to cleanup.if you did so by accident.

Run ./build --help [yet to be implemented] for how to use this script.