Remove excess code from build_examples.sh

Author: aminya

build_examples.sh

@@ -1,133 +1,42 @@
 #!/usr/bin/env bash
 
-# This script is intended to be run from an Ubuntu 18.04 Docker image.
-# Since it uses `apt-get` to install dependencies required by the examples,
-# it may also run on other versions of Ubuntu, or other Debian-derived distros.
-# It will definitely not run without `apt-get` installed!
+# This script is intended to be run from an Ubuntu Docker image (or other Debian-derived distros).
+# It uses `apt-get` to install dependencies required by the examples,
 
 set -euo pipefail
 
-DEFAULT_BUILD_DIR="build"
-BUILD_DIR="${DEFAULT_BUILD_DIR}"
-SCRIPT_NAME=$(basename $0)
-PROJECT_DIRNAME=$(dirname $(readlink -f $0))
-USAGE="Usage: ${SCRIPT_NAME} [options]...
-
-Options:
-  -h, --help                  Print this message
-  -b, --build-dir  BUILD_DIR  Build examples in BUILD_DIR instead of default '${DEFAULT_BUILD_DIR}'
-  --all                       Build all the examples available
-  --fltk                      Build fltk example
-  --gtkmm                     Build gtkmm example
-  --imgui                     Build imgui example
-  --nana                      Build nana example
-  --qt                        Build qt example
-  --sdl                       Build sdl example
-"
-
-function build_fltk() {
+function install_fltk() {
   apt-get install -y --no-install-recommends libfltk1.3-dev libgl1-mesa-dev fluid
-  BUILD_DIR="${1:-build-fltk}"
-  mkdir -p "${BUILD_DIR}"
-  cmake -S "${PROJECT_DIRNAME}" -B "${BUILD_DIR}" -DCPP_STARTER_USE_FLTK=ON
-  cmake --build "${BUILD_DIR}" -j
 }
 
-function build_gtkmm() {
+function install_gtkmm() {
   apt-get install -y --no-install-recommends pkg-config libgtkmm-3.0-dev
-  BUILD_DIR="${1:-build-gtkmm}"
-  mkdir -p "${BUILD_DIR}"
-  cmake -S "${PROJECT_DIRNAME}" -B "${BUILD_DIR}" -DCPP_STARTER_USE_GTKMM=ON
-  cmake --build "${BUILD_DIR}" -j
 }
 
-function build_imgui() {
+function install_imgui() {
   apt-get install -y --no-install-recommends pkg-config libgl1-mesa-dev
-  BUILD_DIR="${1:-build-imgui}"
-  mkdir -p "${BUILD_DIR}"
-  cmake -S "${PROJECT_DIRNAME}" -B "${BUILD_DIR}" -DCPP_STARTER_USE_IMGUI=ON
-  cmake --build "${BUILD_DIR}" -j
 }
 
-function build_nana() {
+function install_nana() {
   # CMakeLists.txt is 'supposed' to install all of these automatically, but for
   # some reason it doesn't always work. Installing them manually does work.
   apt-get install -y --no-install-recommends libjpeg8-dev libpng-dev \
     libasound2-dev alsa-utils alsa-oss libx11-dev libxft-dev libxcursor-dev
-  BUILD_DIR="${1:-build-nana}"
-  mkdir -p "${BUILD_DIR}"
   # Note: Nana's headers trigger the -Wshadow warning, and cannot be compiled with -Werror.
   # Supposedly, this is fixed in the develop-1.8 branch, but I cannot confirm.
-  cmake -S "${PROJECT_DIRNAME}" -B "${BUILD_DIR}" -DCPP_STARTER_USE_NANA=ON -DWARNINGS_AS_ERRORS=FALSE
-  cmake --build "${BUILD_DIR}" -j
 }
 
-function build_qt() {
+function install_qt() {
   apt-get install -y --no-install-recommends qt5-default qtbase5-dev
-  BUILD_DIR="${1:-build-qt}"
-  mkdir -p "${BUILD_DIR}"
-  cmake -S "${PROJECT_DIRNAME}" -B "${BUILD_DIR}" -DCPP_STARTER_USE_QT=ON
-  cmake --build "${BUILD_DIR}" -j
 }
 
-function build_sdl() {
+function install_sdl() {
   pip install mako
-  BUILD_DIR="${1:-build-sdl}"
-  mkdir -p "${BUILD_DIR}"
-  cmake -S "${PROJECT_DIRNAME}" -B "${BUILD_DIR}" -DCPP_STARTER_USE_SDL=ON
-  cmake --build "${BUILD_DIR}" -j
-}
-
-function build_all() {
-  build_fltk
-  build_gtkmm
-  build_imgui
-  build_nana
-  build_qt
-  build_sdl
 }
 
-# Parse the available options
-PARSED_OPTIONS=$(getopt -n "$0" -o h: --long "fltk,gtkmm,imgui,nana,qt,sdl,all,help,build:" -- "$@")
-eval set -- "${PARSED_OPTIONS}"
+# call the above functions to install the required dependencies. As an example for qt:
+# install_qt
 
-# Handle all the options
-while true;
-do
-  case "$1" in
-    --help|-h)
-      echo "${USAGE}"
-      shift;;
-    --build-dir|-b)
-      if [ -n "$2" ];
-      then
-        BUILD_DIR="$2"
-        echo "Using BUILD_DIR='${BUILD_DIR}'"
-      fi
-      shift 2;;
-    --all)
-      build_all $BUILD_DIR
-      shift;;
-    --fltk)
-      build_fltk $BUILD_DIR
-      shift;;
-    --gtkmm)
-      build_gtkmm $BUILD_DIR
-      shift;;
-    --imgui)
-      build_imgui $BUILD_DIR
-      shift;;
-    --nana)
-      build_nana $BUILD_DIR
-      shift;;
-    --qt)
-      build_qt $BUILD_DIR
-      shift;;
-    --sdl)
-      build_sdl $BUILD_DIR
-      shift;;
-    --)
-      shift
-      break;;
-  esac
-done
+# build with:
+cmake -S . -B "./build"
+cmake --build "./build"