divert(-1)

changequote([,])

define([getenv], [
  define([$1], [esyscmd([echo -n $$1])])
  ifelse($1, , [
    ifelse($2, , [undefine([$1])], [define([$1], [$2])])
])])

dnl For installing
getenv([PREFIX],     [./testprefix])
getenv([INCLUDEDIR], [PREFIX/include])
getenv([LIBDIR],     [PREFIX/lib])

getenv([PROD])

divert(0)

cflags  = ifdef([PROD], [],  [-Wall -Wextra -g]) -std=c99 -D_DEFAULT_SOURCE
bin     = build
m4flags =

# building

rule cc
  command = gcc $cflags $in -o $out
rule obj
  command = gcc -MD -MF $out.d $cflags -c $in -o $out
  depfile = $out.d
rule ar
  command = ar rcs $out $in
rule m4
  command = m4 $m4flags $in > $out
rule cpy
  command = cp $in $out
  
build $bin/msgpack.o: obj msgpack.c
build $bin/msgpack.h: cpy msgpack.h

build $bin/libmsgpack.a:  ar $bin/msgpack.o
build $bin/libmsgpack.so: cc $bin/msgpack.o
  cflags = $cflags -fPIC -shared
# build $bin/libmsgpack.h:  m4 msgpack.h | msgpack.c
#   m4flags = -D SOURCE=msgpack.c

# installing


# TODO: make copying better and abstract this somehow
pattern =
dir = 
rule cpy_to_dir
  command = cp $$(/bin/ls $pattern 2> /dev/null) $dir 2> /dev/null

build force: phony
build $bin/files.dd: m4 scanbuild.m4 | force
  m4flags = -D BIN=$bin -D [LIBDIR]=LIBDIR -D [INCLUDEDIR]=INCLUDEDIR

build libs: cpy_to_dir || $bin/files.dd
  dir = LIBDIR
  pattern = $bin/*.{so,a}
  dyndep = $bin/files.dd
build includes: cpy_to_dir || $bin/files.dd
  dir = INCLUDEDIR
  pattern = $bin/*.h
  dyndep = $bin/files.dd

# testing

build $bin/test: cc msgpack.c test.c

rule valgrind
  command = valgrind -s --leak-check=full --show-leak-kinds=all $in

# named targets

rule ninja_clean
  command = ninja -t clean

build static: phony $bin/libmsgpack.a  $bin/msgpack.h
build shared: phony $bin/libmsgpack.so $bin/msgpack.h
# build header: phony $bin/libmsgpack.h

build install: phony libs includes
build clean:   ninja_clean

build test:  valgrind $bin/test

default ifdef([PROD], [static], [test])

# regeneration

rule regen
  command = m4 ninja.m4 > build.ninja
  generator=1
  
build build.ninja: regen ninja.m4
build configure:   regen