make_prob.sh

#!/usr/bin/env bash

DIR=$(dirname $0)

search_up ()
(
    while [[ $PWD != "/" ]]; do
        if [[ -e "$1" ]]; then
            pwd
            if [[ ! -e "$1/$2" ]]; then
                break
            fi
        fi
        cd ..
    done
)
TEMPLATE_DIR='.template'
PARENT_FILE='$PARENT'

IFS=$'\n'
TEMPLATE_DIRS=($(search_up "$TEMPLATE_DIR" "$PARENT_FILE" | tac))
unset IFS
TEMPLATE_DIRS=(${TEMPLATE_DIRS[@]/%/\/"$TEMPLATE_DIR"})

if hash rename.ul 2>/dev/null; then
    RENAME=rename.ul
else
    RENAME=rename
fi

for filepath in "$@"; do
    PROBLEM_NAME=$(basename "$filepath")

    if [[ -e "$filepath" ]]; then
        echo "$filepath already exists. Remove it and retry."
        continue
    fi

    # Copy files in
    mkdir -p "$filepath"
    for CURRENT_TEMPLATE_DIR in "${TEMPLATE_DIRS[@]}"; do
        cp -r -T "$CURRENT_TEMPLATE_DIR" "$filepath/"
    done
    rm -f "$filepath/$PARENT_FILE"

    # Rename PROBLEM_NAME in file names
    find $filepath -type f -print0 | xargs -0 ${RENAME} "\$PROBLEM_NAME" "$PROBLEM_NAME"

    # Envsubst PROBLEM_NAME in files
    export PROBLEM_NAME
    REPLACE_STRING='${PROBLEM_NAME}'
    find $filepath -type f -print0 | xargs -0 -I{} bash -c\
	'TEMP=$(mktemp) && cat "$1" > "$TEMP" && envsubst '"'$REPLACE_STRING'"' < "$TEMP" > "$1" && rm "$TEMP"'\
	-- {}

    pushd $filepath > /dev/null
    if [[ -e "setup" ]]; then
        echo "Running setup"
        ./setup
    fi
    popd > /dev/null
done