#!/usr/bin/env janet

# CLI tool for building janet projects. Wraps cook.

(import cook :prefix "")

(import-rules "./project.janet")

(def- argpeg
  (peg/compile
    '(* "--" '(some (if-not "=" 1)) "=" '(any 1))))

(defn- help
  []
  (print "usage: jpm [targets]... --key=value ...")
  (print "Available targets are:")
  (each k (sort (keys (dyn :rules @{})))
    (print "  " k))
  (print `

Keys are:
  --prefix : The prefix to install to. Defaults to $PREFIX or /usr/local
  --libdir : The directory to install. Defaults to $LIBDIR or $prefix/lib/janet
  --includedir : The directory containing janet headers. Defaults to $INCLUDEDIR or module/*headerpath*.
  --bindir : The directory to install binaries and scripts. Defaults to $BINDIR or $prefix/bin
  --optimize : Optimization level for natives. Defaults to $OPTIMIZE or 2.
  --compiler : C compiler to use for natives. Defaults to $CC or cc.
  --linker : C linker to use for linking natives. Defaults to $LINKER or cc.
  --cflags : Extra compiler flags for native modules. Defaults to $CFLAGS if set.
  --lflags : Extra linker flags for native modules. Defaults to $LFLAGS if set.
    `))

(def args (tuple/slice process/args 2))
(each arg args
  (if (string/has-prefix? "--" arg)
    (let [[key value] (peg/match argpeg arg)]
      (setdyn (keyword key) value))
    (do-rule arg)))

(if (empty? args) (help))