zproject_nodejs.gsl

#   Generate nodejs binding & build
#
#   This is a code generator built using the iMatix GSL code generation
#   language. See https://github.com/imatix/gsl for details.
#
#   Copyright (c) the Contributors as noted in the AUTHORS file.
#   This file is part of zproject.
#
#   This Source Code Form is subject to the terms of the Mozilla Public
#   License, v. 2.0. If a copy of the MPL was not distributed with this
#   file, You can obtain one at http://mozilla.org/MPL/2.0/.

register_target ("nodejs", "Node.js binding")

#   Target provides name space isolation for its functions
function target_nodejs

.macro generate_binding
.output "$(topdir)/.gitignore"
node_modules
build
binding.Makefile
*.mk
out/
Makefile
logs
*.log
npm-debug.log*
.for project.use where !optional
$(use.project)/
.endfor
.if !file.exists ("$(topdir)/.prebuildrc")
.output "$(topdir)/.prebuildrc"
prebuild[] = 4.2.4
prebuild[] = 5.6.0
.else
.   echo "NOT regenerating an existing $(topdir)/.prebuildrc file; you might want to move yours out of the way and re-generate the project again to get updated settings"
.endif
.if !file.exists ("$(topdir)/index.js")
.output "$(topdir)/index.js"
/*
    $(project.name:) exported constants and other initializations

    This is a skeleton created by zproject.
    You can add hand-written code here.

.   for project.license
    $(string.trim (license.):block                                         )
.   endfor
 */

module.exports = {
    $(PROJECT.PREFIX)_WHATEVER: 1
}

.else
.   echo "NOT regenerating an existing $(topdir)/index.js boilerplate file; but you probably should not care (unless your licenses changed)"
.endif
.output "$(topdir)/build.sh"
#! /bin/bash
#
#   Builds $(project.name:c).node package from a fresh git clone
#
$(project.GENERATED_WARNING_HEADER:)
#
set -e                      #   exit on any error
FORCE=0
VERBOSE=0
QUIET="--quiet"
LOGLEVEL="--loglevel=error"

for ARG in $*; do
    if [ "$ARG" == "--help" -o "$ARG" == "-h" ]; then
        echo "build.sh"
        echo " --help / -h          This help"
        echo " --force / -f         Force full rebuild"
        echo " --verbose / -v       Show build output"
        echo " --xverbose / -x      Extra verbose"
        exit
    elif [ "$ARG" == "--force" -o "$ARG" == "-f" ]; then
        FORCE=1
    elif [ "$ARG" == "--verbose" -o "$ARG" == "-v" ]; then
        VERBOSE=1
        QUIET=""
        LOGLEVEL=""
    elif [ "$ARG" == "--xverbose" -o "$ARG" == "-x" ]; then
        VERBOSE=1
        QUIET=""
        LOGLEVEL="--loglevel=verbose"
        set -x
    fi
done

BUILD_ROOT=`pwd`
cd ../../..

.for project.use where !optional & defined (use.repository)
#   Check dependent projects
if [ ! -d $(use.project) ]; then
    echo "I:    cloning $(use.repository) into `pwd`/$(use.project)..."
    git clone $QUIET $(use.repository)
fi
if [ ! -f $(use.project)/builds/gyp/project.gyp ]; then
    echo "E:    `pwd`/$(use.project) out of date (builds/gyp/project.gyp missing)"
    exit
fi

.endfor

#   Check Node.js dependencies
cd $BUILD_ROOT
echo "I: checking Node.js dependencies..."

failed=0
set +e
for package in node-ninja bindings nan prebuild; do
    npm list --depth 1 $package > /dev/null 2>&1
    if [ $? -eq 1 ]; then
        npm list --global --depth 1 $package > /dev/null 2>&1
        if [ $? -eq 1 ]; then
            echo "E: $package isn't installed, run 'npm install [-g] $package'"
            failed=1
        fi
    fi
done
test $failed -eq 0 || exit
set -e

#   Calculate how many compiles we can do in parallel
export JOBS=$\([[ $\(uname) = 'Darwin' ]] \\
    && sysctl -n hw.logicalcpu_max \\
    || lscpu -p | egrep -v '^#' | wc -l)

#   Build the binding using node-ninja directly, not prebuild
echo "I: building Node.js binding:"
node-ninja configure
node-ninja build
.close
.chmod_x ("$(topdir)/build.sh")
.output "$(topdir)/binding.gyp"
$(project.GENERATED_WARNING_HEADER:)
#   GYP file for $(project.name:) Node.js binding
{
  'targets': [
    {
      'target_name': '$(project.name)',
      'sources': [
.   for project.use where !optional
.       if file.exists ("../$(use.project)/$(topdir)/binding.cc")
          '../../../$(use.project)/$(topdir)/binding.cc',
.       endif
.   endfor
          'binding.cc'
      ],
      'include_dirs': [
          "<!(node -e \\"require('nan')\\")",
.   for project.use where !optional
          '../../../$(use.project)/include',
.   endfor
          '../../include'
      ],
      'conditions': [
        [ 'OS=="win"', {
          'defines': [
.for project.use where !optional
            '$(USE.PREFIX)_STATIC',
.endfor
            '$(PROJECT.PREFIX)_STATIC'
          ],
          'libraries': [
            'ws2_32',
            'advapi32',
            'iphlpapi',
            'Rpcrt4'
          ]
        }],
        [ 'OS=="mac"', {
        }],
        [ 'OS=="linux"', {
          'xcode_settings': {
            'OTHER_CFLAGS': [
              '-fPIC'
            ],
          },
          'libraries': [
            '-lpthread'
          ]
        }],
      ],
      'dependencies': [
          '../../builds/gyp/project.gyp:$(project.libname)'
      ]
    }
  ]
}
.output "$(topdir)/package.json"
{
  "name": "$(project.name)",
  "version": "$(nodejs_version?'0.0.1')",
  "description": "$(project.description:)",
  "scripts": {
    "install": "prebuild --install",
    "test": "echo \\"Error: no test specified\\" && exit 1",
    "rebuild": "prebuild --compile",
    "prebuild": "prebuild --strip --verbose"
  },
  "main": "index",
  "author": "See AUTHORS",
  "license": "MPL-2.0",
  "gypfile": true,
  "repository": {
    "type": "git",
    "url": "$(nodejs_repo?'')"
  },
  "dependencies": {
    "bindings": "^1.2.1",
    "nan": "^2.2.0",
    "node-ninja": "^1.0.1",
    "prebuild": "^3.0.3"

  }
}
.
.output "$(topdir)/binding.h"
/*  =========================================================================
    $(project.name:) Node.js binding header file

.   for project.license
    $(string.trim (license.):block                                         )
.   endfor

$(project.GENERATED_WARNING_HEADER:)
    =========================================================================
*/

#ifndef $(PROJECT.NAME:C)_BINDING_H_INCLUDED
#define $(PROJECT.NAME:C)_BINDING_H_INCLUDED

#define $(PROJECT.PREFIX)_BUILD_DRAFT_API

.   for project.use where !optional
.       if file.exists ("../$(use.project)/$(topdir)/binding.h")
#include "../../../$(use.project)/$(topdir)/binding.h"
.       endif
.   endfor
#include "$(project.header)"
#include "nan.h"

using namespace v8;
using namespace Nan;

.for project.class where exported
class $(class.name:Pascal): public Nan::ObjectWrap {
    public:
        static NAN_MODULE_INIT (Init);
.   for class.constructor where name = "new"
        explicit $(class.name:Pascal) ($(called:));
        explicit $(class.name:Pascal) ($(class.c_name)_t *self);
.   else
        explicit $(class.name:Pascal) ();
.   endfor
.   if count (class.constructor)
        $(class.c_name)_t *self;
.   endif
    private:
        ~$(class.name:Pascal) ();
    static Nan::Persistent <Function> &constructor ();

    static NAN_METHOD (New);
.   for class.destructor
    static NAN_METHOD (destroy);
.   endfor
.   if count (class.constructor)
    static NAN_METHOD (defined);
.   endif
.   for class.method where exported
    static NAN_METHOD (_$(method.c_name));
.   endfor
};

.endfor
#endif
.output "$(topdir)/binding.cc"
/*  =========================================================================
    $(project.name:) Node.js binding implementation

.   for project.license
    $(string.trim (license.):block                                         )
.   endfor

$(project.GENERATED_WARNING_HEADER:)
    =========================================================================
*/

#include "binding.h"

using namespace v8;
using namespace Nan;
.
.function invoke (method, map_objects)
    if my.method.singleton
        my.invoke = ""
        comma = ""
    else
        my.invoke = "$(class.c_name)->self"
        comma = ", "
    endif

    for argument
        argument.ref = by_reference?? '&'? ''

        #   These are the types of argument we support so far
        if type = "integer" \
        |  type = "number" \
        |  type = "size" \
        |  type = "time" \
        |  type = "msecs" \
        |  type = "file_size" \
        |  type = "boolean" \
        |  type = "char" \
        |  type = "real"
            my.invoke += "$(comma)($(c_type)) $(ref)$(c_name)"
            comma = ", "

        elsif type = "string" \
        |     type = "buffer"
            my.invoke += "$(comma)($(c_type))$(ref)$(c_name)"
            comma = ", "

        elsif type = "format"
            my.invoke += "$(comma)\"%s\", $(c_name)"
            comma = ", "

        elsif type = "nothing"
        #   Ignore silently

        elsif argument.is_object ?= 1 | type = "sockish"
            if my.map_objects ?= 1
                my.invoke += "$(comma)$(ref)$(c_name)->self"
            else
                my.invoke += "$(comma)$(ref)$(c_name)"
            endif
            comma = ", "

        else
            echo "nodejs: '$(type)', $(class.c_name).$(my.method.c_name).$(argument.c_name)?"
            echo "nodejs: unexpected 'invoke ()'"
        endif
    endfor
    return my.invoke
.endfunction
.
.macro resolve_arguments (method, raw)
.   for argument
.       if type = "integer" \
        |  type = "number" \
        |  type = "time" \
        |  type = "msecs" \
        |  type = "file_size" \
        |  type = "boolean" \
        |  type = "real"
    if (info [$(index () - 1)]->IsUndefined ())
        return Nan::ThrowTypeError ("method requires a `$(name)`");

    $(c_type) $(c_name);
.           if type = "boolean"
.               my.check = "IsBoolean"
.               my.what = "Boolean"
.           elsif type = "real"
.               my.check = "IsDouble"
.               my.what = "number"
.           elsif type = "integer" & count (argument.map)
.               my.check = "IsNumber"
.               my.what = "number or string"
    if (info [$(index () - 1)]->IsString ()) {
        Nan::Utf8String $(c_name)_utf8 (info [$(index () - 1)].As<String>());
        char *$(c_name)_name = *$(c_name)_utf8;
        for (char *$(c_name)_ptr = $(c_name)_name; *$(c_name)_ptr; $(c_name)_ptr++)
            *$(c_name)_ptr = tolower (*$(c_name)_ptr);
.               for map
        if (streq ($(c_name)_name, "$(map.name)"))
            $(c_name) = $(map.value:);
        else
.               endfor
            return Nan::ThrowTypeError ("`$(name)` not a valid string");
    }
    else
.           else
.               my.check = "IsNumber"
.               my.what = "number"
.           endif
    if (info [$(index () - 1)]->$(my.check:) ())
        $(c_name) = Nan::To<$(nan_type:)>(info [$(index () - 1)]).FromJust ();
    else
        return Nan::ThrowTypeError ("`$(name)` must be a $(my.what:)");
.       elsif type = "char"
    char $(c_name);
    if (info [$(index () - 1)]->IsUndefined ())
        return Nan::ThrowTypeError ("method requires a `$(name)`");
    else
    if (!info [$(index () - 1)]->IsString ())
        return Nan::ThrowTypeError ("`$(name)` must be a string");
    else {
        Nan::Utf8String $(c_name)_utf8 (info [$(index () - 1)].As<String>());
        if (strlen (*$(c_name)_utf8) != 1)
            return Nan::ThrowTypeError ("`$(name)` must be a single character");
        $(c_name) = (*$(c_name)_utf8) [0];
    }
.       elsif type = "string" | type = "format"
    char *$(c_name);
    if (info [$(index () - 1)]->IsUndefined ())
.           if optional
        $(c_name) = NULL;
.           else
        return Nan::ThrowTypeError ("method requires a `$(name)`");
.           endif
    else
    if (!info [$(index () - 1)]->IsString ())
        return Nan::ThrowTypeError ("`$(name)` must be a string");
    else {
        Nan::Utf8String $(c_name)_utf8 (info [$(index () - 1)].As<String>());
        $(c_name) = *$(c_name)_utf8;
    }
.       elsif type = "buffer"
    if (info [$(index () - 1)]->IsUndefined ())
        return Nan::ThrowTypeError ("method requires a argument to provide data");
    Local<Object> buffer_node = info [$(index () - 1)].As<Object> ();
    const byte *$(c_name) = (const byte *) node::Buffer::Data (buffer_node);
.       elsif type = "size"
.           if my.prev_type ?= "buffer"
    size_t $(c_name) = node::Buffer::Length (buffer_node);
.           else
    if (info [$(index () - 1)]->IsUndefined ())
        return Nan::ThrowTypeError ("method requires a `$(name)`");
    else
    if (!info [$(index () - 1)]->IsNumber ())
        return Nan::ThrowTypeError ("`$(name)` must be a number");
    $(c_type) $(c_name) = Nan::To<$(nan_type:)>(info [$(index () - 1)]).FromJust ();
.           endif
.       elsif type = "sockish"
    Zsock *$(c_name) = Nan::ObjectWrap::Unwrap<Zsock>(info [$(index () - 1)].As<Object>());
.       elsif argument.is_object ?= 1
    $(type:Pascal) *$(c_name) = Nan::ObjectWrap::Unwrap<$(type:Pascal)>(info [$(index () - 1)].As<Object>());
.       elsif type = "nothing"
.           #   Do nothing
.       else
.           echo "nodejs: unhandled '$(type:)', $(class.c_name).$(my.method.c_name).$(argument.c_name)"
    //  TODO: How do we check $(type)/$(c_type) $(c_name)?
.       endif
.       my.prev_type = type
.   endfor
.endmacro
.
.for project.class where exported

NAN_MODULE_INIT ($(class.name:Pascal)::Init) {
    Nan::HandleScope scope;

    // Prepare constructor template
    Local <FunctionTemplate> tpl = Nan::New <FunctionTemplate> (New);
    tpl->SetClassName (Nan::New ("$(class.name:Pascal)").ToLocalChecked ());
    tpl->InstanceTemplate ()->SetInternalFieldCount (1);

    // Prototypes
.   for class.destructor
    Nan::SetPrototypeMethod (tpl, "$(destructor.name:Camel)", $(destructor.name));
.   endfor
.   if count (class.constructor)
    Nan::SetPrototypeMethod (tpl, "defined", defined);
.   endif
.   for class.method where exported
    Nan::SetPrototypeMethod (tpl, "$(method.name:Camel)", _$(method.c_name));
.   endfor

    constructor ().Reset (Nan::GetFunction (tpl).ToLocalChecked ());
    Nan::Set (target, Nan::New ("$(class.name:Pascal)").ToLocalChecked (),
    Nan::GetFunction (tpl).ToLocalChecked ());
}
.   for class.constructor where name = "new"

$(class.name:Pascal)::$(class.name:Pascal) ($(called:)) {
    self = $(class.c_name:)_$(c_name) ($(invoke (constructor)));
}

$(class.name:Pascal)::$(class.name:Pascal) ($(class.c_name)_t *self_) {
    self = self_;
}
.   else

$(class.name:Pascal)::$(class.name:Pascal) () {
}
.   endfor

$(class.name:Pascal)::~$(class.name:Pascal) () {
}

NAN_METHOD ($(class.name:Pascal)::New) {
    assert (info.IsConstructCall ());
.   for class.constructor where name = "new"
.       resolve_arguments (constructor)
    $(class.name:Pascal) *$(class.c_name) = new $(class.name:Pascal) ($(invoke (constructor, 1)));
.   else
    $(class.name:Pascal) *$(class.c_name) = new $(class.name:Pascal) ();
.   endfor
    if ($(class.c_name)) {
        $(class.c_name)->Wrap (info.This ());
        info.GetReturnValue ().Set (info.This ());
    }
}
.   for class.destructor

NAN_METHOD ($(class.name:Pascal)::destroy) {
    $(class.name:Pascal) *$(class.c_name) = Nan::ObjectWrap::Unwrap <$(class.name:Pascal)> (info.Holder ());
    $(class.c_name)_$(destructor.name) (&$(class.c_name)->self);
}

.   endfor
.   if count (class.constructor)

NAN_METHOD ($(class.name:Pascal)::defined) {
    $(class.name:Pascal) *$(class.c_name) = Nan::ObjectWrap::Unwrap <$(class.name:Pascal)> (info.Holder ());
    info.GetReturnValue ().Set (Nan::New ($(class.c_name)->self != NULL));
}
.   endif
.   for class.method where exported

NAN_METHOD ($(class.name:Pascal)::_$(method.c_name)) {
.       if !singleton
    $(class.name:Pascal) *$(class.c_name) = Nan::ObjectWrap::Unwrap <$(class.name:Pascal)> (info.Holder ());
.       endif
.       resolve_arguments (method)
.       if ->return.type = "integer" \
        |  ->return.type = "number" \
        |  ->return.type = "size" \
        |  ->return.type = "time" \
        |  ->return.type = "msecs" \
        |  ->return.type = "file_size" \
        |  ->return.type = "real"
    $(->return.c_type) result = $(class.c_name)_$(method.c_name) ($(invoke (method, 1)));
    info.GetReturnValue ().Set (Nan::New<Number>(result));
.
.       elsif ->return.type = "boolean"
    bool result = $(class.c_name)_$(method.c_name) ($(invoke (method, 1)));
    info.GetReturnValue ().Set (Nan::New<Boolean>(result));
.
.       elsif ->return.type = "string"
    char *result = (char *) $(class.c_name)_$(method.c_name) ($(invoke (method, 1)));
    info.GetReturnValue ().Set (Nan::New (result).ToLocalChecked ());
.
.       elsif ->return.type = "char"
    char result [2] = " ";
    result [0] = $(class.c_name)_$(method.c_name) ($(invoke (method, 1)));
    info.GetReturnValue ().Set (Nan::New (result).ToLocalChecked ());
.
.       elsif ->return.type = "buffer"
.           if regexp.match ("^\\.(.*)", ->return.size, my.size)
.               my.size = "$(class.c_name)_$(my.size) ($(class.c_name)->self)"
.           else
.               my.size = ->return.size
.           endif
    const char *result = (const char *) $(class.c_name)_$(method.c_name) ($(invoke (method, 1)));
    info.GetReturnValue().Set (Nan::CopyBuffer (result, $(my.size)).ToLocalChecked ());
.       elsif ->return.is_object ?= 1
    $(->return.c_type)result = $(class.c_name)_$(method.c_name) ($(invoke (method, 1)));
    $(->return.type:Pascal) *$(->return.type:c)_result = new $(->return.type:Pascal) (result);
    if ($(->return.type:c)_result) {
    //  Don't yet know how to return a new object
    //      $(->return.type:c)->Wrap (info.This ());
    //      info.GetReturnValue ().Set (info.This ());
        info.GetReturnValue ().Set (Nan::New<Boolean>(true));
    }
.
.       elsif ->return.type = "nothing"
    $(class.c_name)_$(method.c_name) ($(invoke (method, 1)));
.
.       else
.           echo "nodejs: what do we do with return '$(->return.type:)', $(class.c_name).$(method.c_name)?"
.       endif
}
.   endfor

Nan::Persistent <Function> &$(class.name:Pascal)::constructor () {
    static Nan::Persistent <Function> my_constructor;
    return my_constructor;
}

.endfor

extern "C" NAN_MODULE_INIT ($(project.name:c)_initialize)
{
.for project.class where exported
    $(class.name:Pascal)::Init (target);
.endfor
}

NODE_MODULE ($(project.name:c), $(project.name:c)_initialize)
.output "$(topdir)/README.md"
# Node.js Binding for $(project.name:)

This is a development kit. Note: this README is generated automatically
by zproject from project.xml. Please DO NOT modify by hand except for test
purposes.

## Prerequisites

### Node.js

* You need Python (v2.7 recommended, v3.x not supported)
* You need (I recommend) nvm and Node.js.
* If your Linux has an existing 'node' command, `sudo apt-get remove node`.
* In every terminal, or .bashrc: `nvm use v5.5.0`

To install the necessary Node tools:

```
sudo apt-get update
sudo apt-get install build-essential libssl-dev
curl https://raw.githubusercontent.com/creationix/nvm/v0.11.1/install.sh | bash
# close terminal, re-open
nvm ls-remote
nvm install v5.5.0
npm install -g nan
npm install -g node-ninja
npm install -g prebuild
npm install -g bindings
```

To build:

```
mkdir -p $HOME/temp
cd $HOME/temp
git clone https://github.com/zeromq/$(project.name:c)
cd $(project.name:c)/bindings/nodejs
#   Clones dependencies, builds everything
\./build.sh
```

## API

This is a wrapping of the native C $(project.libname) library. See binding.cc for the code.
.function args (method)
    my.args = ""
    comma = ""
    for argument
        if type = "integer" \
        |  type = "number" \
        |  type = "real" \
        |  type = "time" \
        |  type = "msecs" \
        |  type = "file_size"
            my.args += "$(comma)Number"

        elsif type = "boolean"
            my.args += "$(comma)Boolean"

        elsif type = "char" \
        |     type = "string" \
        |     type = "format" \
        |     type = "buffer"
            my.args += "$(comma)String"

        elsif type = "sockish"
            my.args += "$(comma)Zsock"

        elsif argument.is_object ?= 1
            my.args += "$(comma)$(type:Pascal)"
        endif
        comma = ", "
    endfor
    return my.args
.endfunction
.
.for project.class where exported

### The $(class.name:Pascal) class - $(class.description:)

Constructor:

```
var $(project.prefix) = require ('bindings')('$(project.name:c)')
.   for class.constructor where name = "new"
var my_$(class.name:c) = new $(project.prefix).$(class.name:Pascal) ($(args (constructor)))
.   else
var my_$(class.name:c) = new $(project.prefix).$(class.name:Pascal) ()
.   endfor
```
.   for class.destructor

You *must* call the destructor on every $(class.name:Pascal) instance:

```
my_$(class.name:c).$(destructor.name:Camel) ()
```
.   endfor
.   for class.method where exported
.       if first ()

Methods:
.       endif

```
.       if count (method.return)
.           if $(->return.is_object)
$(->return.type:Pascal) \
.           else
$(->return.type:) \
.           endif
.       endif
my_$(class.name:c).$(method.name:Camel) ($(args (method)))
```

$(method.description?'':)
.   endfor
.endfor
.endmacro

function resolve_method (method)
    my.method.called = ""
    my.method.exported = 1
    comma = ""

    for argument
        #   These are the types of argument we support so far
        if type = "integer" \
        |  type = "number" \
        |  type = "size" \
        |  type = "time" \
        |  type = "msecs" \
        |  type = "file_size" \
        |  type = "boolean" \
        |  type = "char" \
        |  type = "real"
            my.method.called += "$(comma)$(c_type) $(c_name)"
            comma = ", "

            #   Get NAN types for integer casting
            if type = "integer"
                argument.nan_type = "int"
            elsif type = "number"
                if size = 1 | size = 2 | size = 4
                    argument.nan_type = "uint32_t"
                else
                    argument.nan_type = "int64_t"
                endif
            elsif type = "size" \
            |     type = "time" \
            |     type = "msecs" \
            |     type = "file_size"
                argument.nan_type = "int64_t"
            elsif type = "boolean"
                argument.nan_type = "bool"
            elsif type = "real"
                argument.nan_type = "double"
            endif

        elsif type = "format" \
        |     type = "string" \
        |     type = "buffer"
            my.method.called += "$(comma)$(c_type)$(c_name)"
            comma = ", "

        elsif type = "sockish"
            my.method.called += "$(comma)zsock_t *$(c_name)"
            comma = ", "

        elsif type = "nothing" \
        |     destructor_self ?= 1
            #   Ignore silently

        elsif count (project.class, class.c_name = argument.type) \
        |     count (project->dependencies.class, class.c_name = argument.type)
            my.method.called += "$(comma)$(c_type)$(c_name)"
            comma = ", "
            argument.is_object = 1

        else
            my.method.exported = 0
            # echo "nodejs: can't do '$(type)', $(class.c_name).$(my.method.c_name).$(argument.c_name)"
        endif
    else
        my.method.called += "void"
    endfor

    #   Check if method return is something we know about
    if ->return.type = "integer" \
    |  ->return.type = "number" \
    |  ->return.type = "size" \
    |  ->return.type = "time" \
    |  ->return.type = "msecs" \
    |  ->return.type = "file_size" \
    |  ->return.type = "real" \
    |  ->return.type = "boolean" \
    |  ->return.type = "string" \
    |  ->return.type = "char" \
    |  ->return.type = "buffer" \
    |  ->return.type = "nothing"
        #   Good stuff, we know how to return these

    elsif count (project.class, class.c_name = my.method->return.type) \
    |     count (project->dependencies.class, class.c_name = my.method->return.type)
        my.method->return.is_object = 1

    else
        # echo "Suppress $(class.name).$(my.method.name)"
        my.method.exported = 0
    endif
endfunction

    #   We always need the gyp target
    assume_target ("gyp")

    project.topdir = "bindings/nodejs"
    directory.create (project.topdir)
    for project.class
        if defined (class.api) & scope = "public"
            class.exported = 1
            for constructor
                resolve_method (constructor)
                if !constructor.exported & constructor.name = "new"
                    # echo "Suppress $(class.name)"
                    class.exported = 0
                endif
            endfor
            if class.exported
                for destructor
                    resolve_method (destructor)
                endfor
                for method
                    resolve_method (method)
                endfor
            endif
        else
            class.exported = 0
        endif
    endfor
    generate_binding ()
endfunction