#!/usr/bin/env bash

name=$1

if [ -d "$name" ]; then
    echo "program $name already exists"
    exit 1
fi

mkdir -p "$name"/{src,include}/
touch "$name"/makefile

cat <<EOT >> "$name"/makefile
program = $name

CC = gcc
SRC_DIR := src
OBJ_DIR := obj
BIN_DIR := bin
INCLUDES := -Iinclude

EXE := \$(BIN_DIR)/\$(program).out
SRC := \$(wildcard \$(SRC_DIR)/*.c)
OBJ := \$(SRC:\$(SRC_DIR)/%.c=\$(OBJ_DIR)/%.o)

CPPFLAGS := \$(INCLUDES) -MMD -MP
CFLAGS = -O -Wall -W -pedantic -ansi -std=c99
LDFLAGS  := -Llib
LDLIBS   := -lm

.PHONY: all clean

all: \$(EXE)

\$(EXE): \$(OBJ) | \$(BIN_DIR)
	\$(CC) \$(LDFLAGS) \$^ \$(LDLIBS) -o \$@

\$(OBJ_DIR)/%.o: \$(SRC_DIR)/%.c | \$(OBJ_DIR)
	\$(CC) \$(CPPFLAGS) \$(CFLAGS) -c $< -o \$@

\$(BIN_DIR) \$(OBJ_DIR):
	@mkdir -p \$@

clean:
	@rm -rv \$(BIN_DIR) \$(OBJ_DIR)

-include \$(OBJ:.o=.d)
EOT

cat <<EOT >> "$name"/src/"$name".c
/********************************************************************************
    C Programming (2nd ed.) A Modern Approach, by
    K. N. King
    ISBN: 9780393871845
********************************************************************************/
EOT