#!/bin/sh

set -e

if ! test $# = 1; then
	printf 'usage %s: proj-name\n' "$0" >&2
	exit 1
fi

if printf '%s\n' "$1" | grep / >/dev/null 2>/dev/null; then
	printf 'project name cannot contain a slash\n' "$0" >&2
	exit 1
fi

mkdir -- "$1"
cd -- "$1"
git init .

cat > LICENSE <<EOF
ISC License

© $(date +%Y) Mattias Andrée <maandree@kth.se>

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
EOF

cat > .gitignore <<EOF
*\#*
*~
*.o
*.a
*.lo
*.su
*.so
*.so.*
*.dll
*.dylib
*.gch
*.gcov
*.gcno
*.gcda
EOF

printf '_*\n' >> .git/info/exclude

if printf '%s\n' "$1" | grep '^lib' >/dev/null 2>/dev/null; then
	UPPERCASE="$(printf '%s\n' "$1" | tr '[a-z-]' '[A-Z_]')"
	LIBNAME="$(printf '%s\n' "$1" | sed 's/^lib//')"

	printf '%s\n' >> "$1".h \
		'/* See LICENSE file for copyright and license details. */' \
		"#ifndef ${UPPERCASE}_H" \
		"#define ${UPPERCASE}_H" \
		'' \
		'#endif'

	mkdir -p -- mk

	cat <<-EOF | sed 's/x\t/\t/g' > Makefile
		.POSIX:

		CONFIGFILE = config.mk
		include \$(CONFIGFILE)

		OS = linux
		# Linux:   linux                                                                                                                        
		# Mac OS:  macos                                                                                                                        
		# Windows: windows                                                                                                                      
		include mk/\$(OS).mk


		LIB_MAJOR = 1
		LIB_MINOR = 0
		LIB_VERSION = \$(LIB_MAJOR).\$(LIB_MINOR)
		LIB_NAME = \${LIBNAME}


		OBJ =

		HDR =\\
		x	$1.h

		LOBJ = \$(OBJ:.o=.lo)


		all: $1.a $1.\$(LIBEXT)
		\$(OBJ): \$(HDR)
		\$(LOBJ): \$(HDR)

		.c.o:
		x	\$(CC) -c -o \$@ \$< \$(CFLAGS) \$(CPPFLAGS)

		.c.lo:
		x	\$(CC) -fPIC -c -o \$@ \$< \$(CFLAGS) \$(CPPFLAGS)

		$1.a: \$(OBJ)
		x	@rm -f -- \$@
		x	\$(AR) rc \$@ \$(OBJ)

		$1.\$(LIBEXT): \$(LOBJ)
		x	\$(CC) \$(LIBFLAGS) -o $@ \$(LOBJ) \$(LDFLAGS)

		install: $1.a $1.\$(LIBEXT)
		x	mkdir -p -- "\$(DESTDIR)\$(PREFIX)/lib"
		x	mkdir -p -- "\$(DESTDIR)\$(PREFIX)/include"
		x	cp -- $1.a "\$(DESTDIR)\$(PREFIX)/lib/"
		x	cp -- $1.\$(LIBEXT) "\$(DESTDIR)\$(PREFIX)/lib/$1.\$(LIBMINOREXT)"
		x	ln -sf -- $1.\$(LIBMINOREXT) "\$(DESTDIR)\$(PREFIX)/lib/$1.\$(LIBMAJOREXT)"
		x	ln -sf -- $1.\$(LIBMAJOREXT) "\$(DESTDIR)\$(PREFIX)/lib/$1.\$(LIBEXT)"
		x	cp -- $1.h "\$(DESTDIR)\$(PREFIX)/include/"

		uninstall:
		x	-rm -f -- "\$(DESTDIR)\$(PREFIX)/lib/$1.a"
		x	-rm -f -- "\$(DESTDIR)\$(PREFIX)/lib/$1.\$(LIBMAJOREXT)"
		x	-rm -f -- "\$(DESTDIR)\$(PREFIX)/lib/$1.\$(LIBMINOREXT)"
		x	-rm -f -- "\$(DESTDIR)\$(PREFIX)/lib/$1.\$(LIBEXT)"
		x	-rm -f -- "\$(DESTDIR)\$(PREFIX)/include/$1.h"

		clean:
		x	-rm -f -- *.o *.a *.lo *.su *.so *.so.* *.dll *.dylib
		x	-rm -f -- *.gch *.gcov *.gcno *.gcda *.\$(LIBEXT)

		.SUFFIXES:
		.SUFFIXES: .lo .o .c

		.PHONY: all install uninstall clean
	EOF

	cat <<-EOF | sed 's/x\t/\t/g' > mk/linux.mk
		LIBEXT      = so
		LIBFLAGS    = -shared -Wl,-soname,lib\$(LIB_NAME).\$(LIBEXT).\$(LIB_MAJOR)
		LIBMAJOREXT = \$(LIBEXT).\$(LIB_MAJOR)
		LIBMINOREXT = \$(LIBEXT).\$(LIB_VERSION)
	EOF

	cat <<-EOF | sed 's/x\t/\t/g' > mk/macos.mk
		LIBEXT      = dylib
		LIBFLAGS    = -dynamiclib
		LIBMAJOREXT = \$(LIB_MAJOR).\$(LIBEXT)
		LIBMINOREXT = \$(LIB_VERSION).\$(LIBEXT)
	EOF

	cat <<-EOF | sed 's/x\t/\t/g' > mk/windows.mk
		LIBEXT      = dll
		LIBFLAGS    = -mdll
		LIBMAJOREXT = \$(LIB_MAJOR).\$(LIBEXT)
		LIBMINOREXT = \$(LIB_VERSION).\$(LIBEXT)
	EOF
else
	printf '%s\n' "/$1"  >> .gitignore

	printf '%s\n' '/* See LICENSE file for copyright and license details. */'  >> "$1".c

	cat <<-EOF | sed 's/x\t/\t/g' > Makefile
		.POSIX:

		CONFIGFILE = config.mk
		include \$(CONFIGFILE)

		OBJ =\\
		x	$1.o

		HDR =

		all: $1
		\$(OBJ): \$(HDR)

		.c.o:
		x	\$(CC) -c -o \$@ \$< \$(CFLAGS) \$(CPPFLAGS)

		$1: \$(OBJ)
		x	\$(CC) -o \$@ \$(OBJ) \$(LDFLAGS)

		install: $1
		x	mkdir -p -- "\$(DESTDIR)\$(PREFIX)/bin"
		x	mkdir -p -- "\$(DESTDIR)\$(MANPREFIX)/man1/"
		x	cp -- $1 "\$(DESTDIR)\$(PREFIX)/bin/"
		x	cp -- $1.1 "\$(DESTDIR)\$(MANPREFIX)/man1/"

		uninstall:
		x	-rm -f -- "\$(DESTDIR)\$(PREFIX)/bin/$1"
		x	-rm -f -- "\$(DESTDIR)\$(MANPREFIX)/man1/$1.1"

		clean:
		x	-rm -f -- *.o *.a *.lo *.su *.so *.so.* *.gch *.gcov *.gcno *.gcda
		x	-rm -f -- $1

		.SUFFIXES:
		.SUFFIXES: .o .c

		.PHONY: all install uninstall clean
	EOF
fi

cat > config.mk <<-EOF
	PREFIX    = /usr
	MANPREFIX = \$(PREFIX)/share/man

	CC = cc

	CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700 -D_GNU_SOURCE
	CFLAGS   = -std=c99 -Wall -g
	LDFLAGS  =
EOF