#!/bin/sh

H_FILE="regexis024_build_system.h"
SH_TEMP_FILE="regexis024_build_system.sh"

if [ \! \( -f "$H_FILE" \) -o \! \( -f "$SH_TEMP_FILE" \) ]; then
    echo "Change cwd to root of build system source code root directory"; exit 1;
fi

usage(){
    echo "Usage: ./install.sh [installation root]"
}

if [ $# -gt 1 ]; then usage; exit 1; fi

INST_ROOT="/usr"

if [ $# -ge 1 ]; then INST_ROOT="$1"; fi

INST_ROOT="$(realpath "$INST_ROOT")"

install -d "$INST_ROOT/include"

if [ $? != 0 ]; then
    echo "Can't install IR/bin directory"; exit 1;
fi

install "$H_FILE" "$INST_ROOT/include/"

if [ $? != 0 ]; then
    echo "Can't copy $H_FILE"; exit 1;
fi

I_DIR="$INST_ROOT/include"

escape4shell(){
    echo "$1" | sed -e "s/'/'\\\\''/g; 1s/^/'/; \$s/\$/'/"
}

SH_TEMPLATE="$(cat "$SH_TEMP_FILE")"
SH_TEMPLATE="${SH_TEMPLATE/"i_dir=99999"/"id_dir=$(escape4shell "$I_DIR")"}"

install -d "$INST_ROOT/bin"

if [ $? != 0 ]; then echo "Failed to install IR/bin directory"; exit 1; fi

echo "$SH_TEMPLATE" > "$INST_ROOT/bin/$SH_TEMP_FILE"

if [ $? != 0 ]; then
   echo "Can't paste generated $SH_TEMP_FILE"; exit 1
fi

chmod +x "$INST_ROOT/bin/$SH_TEMP_FILE"

if [ $? != 0 ]; then
    echo "Can't chmod +x on .sh script in IR/bin"; exit 1
fi