refactor: remove duplication in setup script

The executable variable definitions were duplicated for each container
type so they could be prefixed with the necessary commands to run the
executable from within the container. the `$RUN` variable already had
this command set for each container type, so use that universally
instead.

Author: jordancarlin

bin/setup

@@ -223,55 +223,21 @@ if [ ! -d ${ROOT}/node_modules ]; then
     ${RUN} npm i
 fi
 
-if [ "${CONTAINER_TYPE}" == "devcontainer" ]; then
-    BUNDLE="bundle"
-    RUBY="bundle exec ruby"
-    RAKE="bundle exec rake"
-    NPM="npm"
-    NPX="npx"
-    NODE="node"
-    PYTHON="${ROOT}/.home/.venv/bin/python3"
-    PIP="${ROOT}/.home/.venv/bin/pip"
-    BASH="bash"
-    GPP="g++"
-    GDB="gdb"
-    CLANG_FORMAT="clang-format"
-    CLANG_TIDY="clang-tidy"
-    MAKE="make"
-elif [ "${CONTAINER_TYPE}" == "docker" -o "${CONTAINER_TYPE}" == "podman" ]; then
-    BUNDLE="${CONTAINER_BASE} bundle"
-    RUBY="${CONTAINER_BASE} bundle exec ruby"
-    RAKE="${CONTAINER_BASE} bundle exec rake"
-    NPM="${CONTAINER_BASE} npm"
-    NPX="${CONTAINER_BASE} npx"
-    NODE="${CONTAINER_BASE} node"
-    PYTHON="${CONTAINER_BASE} ${ROOT}/.home/.venv/bin/python3"
-    PIP="${CONTAINER_BASE} ${ROOT}/.home/.venv/bin/pip"
-    BASH="${CONTAINER_BASE} bash"
-    GPP="${CONTAINER_BASE} g++"
-    GDB="${CONTAINER_BASE} gdb"
-    CLANG_FORMAT="${CONTAINER_BASE} clang-format"
-    CLANG_TIDY="${CONTAINER_BASE} clang-tidy"
-    MAKE="${CONTAINER_BASE} make"
-elif [ "${CONTAINER_TYPE}" == "singularity" ]; then
-    BUNDLE="singularity run ${HOME_OPT} ${CONTAINER_PATH} bundle"
-    RUBY="singularity run ${HOME_OPT} ${CONTAINER_PATH} bundle exec ruby"
-    RAKE="singularity run ${HOME_OPT} ${CONTAINER_PATH} bundle exec rake"
-    NPM="singularity run ${HOME_OPT} ${CONTAINER_PATH} npm"
-    NPX="singularity run ${HOME_OPT} ${CONTAINER_PATH} npx"
-    NODE="singularity run ${HOME_OPT} ${CONTAINER_PATH} node"
-    PYTHON="singularity run ${HOME_OPT} ${CONTAINER_PATH} ${ROOT}/.home/.venv/bin/python3"
-    PIP="singularity run ${HOME_OPT} ${CONTAINER_PATH} ${ROOT}/.home/.venv/bin/pip"
-    BASH="singularity run ${HOME_OPT} ${CONTAINER_PATH} bash"
-    GPP="singularity run ${HOME_OPT} ${CONTAINER_PATH} g++"
-    GDB="singularity run ${HOME_OPT} ${CONTAINER_PATH} gdb"
-    CLANG_FORMAT="singularity run ${HOME_OPT} ${CONTAINER_PATH} clang-format"
-    CLANG_TIDY="singularity run ${HOME_OPT} ${CONTAINER_PATH} clang-tidy"
-    MAKE="singularity run ${HOME_OPT} ${CONTAINER_PATH} make"
-else
-    echo "Bad container type: ${CONTAINER_TYPE}" 1>&2
-    exit 1
-fi
+# Set executables
+BUNDLE="${RUN} bundle"
+RUBY="${RUN} bundle exec ruby"
+RAKE="${RUN} bundle exec rake"
+NPM="${RUN} npm"
+NPX="${RUN} npx"
+NODE="${RUN} node"
+PYTHON="${RUN} ${ROOT}/.home/.venv/bin/python3"
+PIP="${RUN} ${ROOT}/.home/.venv/bin/pip"
+BASH="${RUN} bash"
+GPP="${RUN} g++"
+GDB="${RUN} gdb"
+CLANG_FORMAT="${RUN} clang-format"
+CLANG_TIDY="${RUN} clang-tidy"
+MAKE="${RUN} make"
 
 git config --local commit.template ${ROOT}/.gitmessage