IceTea concept in Wren

buildit.wren

import "Toolchains/Native" for Native
import "FLTK" for libfltk
import "Detector/CC" for CC_Detector

namespace("IngwiePhoenix") {|ns|
  // @var ns: Current namespace object. Can be omitted.
  
  Native.executable("MyApp") {|t|
    // @var t: Current target
    
    // "@" reffers to the current build script
    t.input = ["@/src/*.cpp"]

    // Add dependencies
    t.needs(libfltk)
    t.needs("/SomeTarget") // Resolved from root
    tneeds("util") // Target relative to current ns.

    t.on("configure") {
      var cc = CC_Detector()
      cc.configHeader = t.buildPath(
        t.tmpDir, "config.h"
      )
      cc.hasHeader([
        // Pass array to check many
        "stdio.h",
        "stdbool.h",
        "unistd.h",
        "windows.h"
      ])
      cc.hasType({
        // Definition: type = header/s or nothing
        "uint32_t": "stdint.h",
        "uint32_t",
        "uint64_t": "stdint.h",
        "uint64_t"
      })

      // Returns true after writing headers and such.
      return cc.done()
    }

    t.settings += {
      // using += matches the object
      // native is an abstraction for any "native" language.
      native: {
        includeDirs: [t.tmpDir],
        defines: {
          "DEBUG": !!_ENV["DEBUG"]
        }
      }
    }
  }

  action("default") {
    // default action will run when user runs program in same folder as
    // build description.
    
    build(["MyApp"])
    clean(["MyApp"])
    install(["MyApp"])
  }

  // Alternative:
  action("default") {
    all("MyApp")
  }

  // Or:
  action("default", "MyApp")
}