generate

#!/bin/bash

if test $# -ne 1; then
    echo "Usage: $0 <session-name>" 1>&2
    echo
    echo "Available sessions:"
    IFS=$'\n'
    for f in templates/*; do
        echo -e "    - $(basename "$f")"
    done
    exit 1
fi

session="$1"
tpl_session_path=templates/"$1"

if test ! -d "$tpl_session_path"; then
    echo "No such session: $session" 1>&2
    exit 1
fi

# Cleanup session folder if it exists.
if test -d "$session"; then
    echo -en "Session folder ($session) already exists. It will be erased and recreated. Do you want to continue? [y/N] "
    read answer
    if test ! "$answer" == "y"; then
        exit 0
    fi
    rm -fr "$session"
fi
mkdir "$session"

# Copy everything except for config file.
cp -r "$tpl_session_path"/* "$session"

# Generate actual files by replacing template statements using sed.
IFS=$'\n'
for task in "$session"/challenges/*; do
    if test ! -d "$task"; then
        continue
    fi
    rm -f "$task"/.config
    config="$tpl_session_path"/challenges/"$(basename "$task")"/.config
    find "$task" -type f | while IFS=$'\n' read f; do
        echo "file: $f, config: $config"
        if test -f "$config"; then
            cat "$config" | while IFS=$'\n' read line; do
                key=$(sed 's/^\([^= \t]\+\)[ \t]*=.*$/\1/' <<< "$line")
                value=$(sed 's/^[^=]\+=[ \t]*\(.*\)$/\1/' <<< "$line")
                key=${key//\//\\/}
                value=${value//\//\\/}
                #echo "key: $key, value: $value"
                sed -i "s/$key/$value/g" "$f"
            done
        fi
    done
done