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Add dynamic path for platform and archictecture #80

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106 changes: 13 additions & 93 deletions README.md
Original file line number Diff line number Diff line change
@@ -1,98 +1,18 @@
node-bindings
[bundled-bindings](https://www.npmjs.com/package/bundled-bindings)
=============
### Helper module for loading your native module's `.node` file

This is a helper module for authors of Node.js native addon modules.
It is basically the "swiss army knife" of `require()`ing your native module's
`.node` file.
Fork of [node-bindings](https://github.com/TooTallNate/node-bindings),
re-purposed for use in a bundled environment.

Throughout the course of Node's native addon history, addons have ended up being
compiled in a variety of different places, depending on which build tool and which
version of node was used. To make matters worse, now the `gyp` build tool can
produce either a __Release__ or __Debug__ build, each being built into different
locations.
The original node-bindings attempts to load native addons by walking a series of
known paths relative to the executing file's `node_modules` folder. This doesn't
work well for a bundled use case where there is no `node_modules` folder and the
native addons need to be placed alongside the bundled file.

This module checks _all_ the possible locations that a native addon would be built
at, and returns the first one that loads successfully.
The approach used by this fork is to look for the native addons where the build
process places them. The goal is to support loading modules both in an bundled
case and in a non-bundled case.


Installation
------------

Install with `npm`:

``` bash
$ npm install --save bindings
```

Or add it to the `"dependencies"` section of your `package.json` file.


Example
-------

`require()`ing the proper bindings file for the current node version, platform
and architecture is as simple as:

``` js
var bindings = require('bindings')('binding.node')

// Use your bindings defined in your C files
bindings.your_c_function()
```


Nice Error Output
-----------------

When the `.node` file could not be loaded, `node-bindings` throws an Error with
a nice error message telling you exactly what was tried. You can also check the
`err.tries` Array property.

```
Error: Could not load the bindings file. Tried:
→ /Users/nrajlich/ref/build/binding.node
→ /Users/nrajlich/ref/build/Debug/binding.node
→ /Users/nrajlich/ref/build/Release/binding.node
→ /Users/nrajlich/ref/out/Debug/binding.node
→ /Users/nrajlich/ref/Debug/binding.node
→ /Users/nrajlich/ref/out/Release/binding.node
→ /Users/nrajlich/ref/Release/binding.node
→ /Users/nrajlich/ref/build/default/binding.node
→ /Users/nrajlich/ref/compiled/0.8.2/darwin/x64/binding.node
at bindings (/Users/nrajlich/ref/node_modules/bindings/bindings.js:84:13)
at Object.<anonymous> (/Users/nrajlich/ref/lib/ref.js:5:47)
at Module._compile (module.js:449:26)
at Object.Module._extensions..js (module.js:467:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
...
```

The searching for the `.node` file will originate from the first directory in which has a `package.json` file is found.

License
-------

(The MIT License)

Copyright (c) 2012 Nathan Rajlich &lt;[email protected]&gt;

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
'Software'), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
The bundled case is determined by looking for a neighboring `compiled`
directory. The non-bundled case is determined by looking for a `dist/compiled`
when walking up the filesystem from the current file.
82 changes: 12 additions & 70 deletions bindings.js
Original file line number Diff line number Diff line change
@@ -4,7 +4,6 @@

var fs = require('fs'),
path = require('path'),
fileURLToPath = require('file-uri-to-path'),
join = path.join,
dirname = path.dirname,
exists =
@@ -49,21 +48,13 @@ var fs = require('fs'),
['module_root', 'build', 'default', 'bindings'],
// Production "Release" buildtype binary (meh...)
['module_root', 'compiled', 'version', 'platform', 'arch', 'bindings'],
// node-qbs builds
['module_root', 'addon-build', 'release', 'install-root', 'bindings'],
['module_root', 'addon-build', 'debug', 'install-root', 'bindings'],
['module_root', 'addon-build', 'default', 'install-root', 'bindings'],
// node-pre-gyp path ./lib/binding/{node_abi}-{platform}-{arch}
['module_root', 'lib', 'binding', 'nodePreGyp', 'bindings']
['module_root', 'compiled', 'platform', 'arch', 'bindings'],
]
};

/**
* The main `bindings()` function loads the compiled bindings for a given module.
* It uses V8's Error API to determine the parent filename that this function is
* being invoked from, which is then used to find the root directory.
*/

function bindings(opts) {
// Argument surgery
if (typeof opts == 'string') {
@@ -79,7 +70,7 @@ function bindings(opts) {

// Get the module root
if (!opts.module_root) {
opts.module_root = exports.getRoot(exports.getFileName());
opts.module_root = getRoot(__filename);
}

// Ensure the given bindings name ends with .node
@@ -136,84 +127,35 @@ function bindings(opts) {
err.tries = tries;
throw err;
}
module.exports = exports = bindings;

/**
* Gets the filename of the JavaScript file that invokes this function.
* Used to help find the root directory of a module.
* Optionally accepts an filename argument to skip when searching for the invoking filename
*/

exports.getFileName = function getFileName(calling_file) {
var origPST = Error.prepareStackTrace,
origSTL = Error.stackTraceLimit,
dummy = {},
fileName;

Error.stackTraceLimit = 10;

Error.prepareStackTrace = function(e, st) {
for (var i = 0, l = st.length; i < l; i++) {
fileName = st[i].getFileName();
if (fileName !== __filename) {
if (calling_file) {
if (fileName !== calling_file) {
return;
}
} else {
return;
}
}
}
};

// run the 'prepareStackTrace' function above
Error.captureStackTrace(dummy);
dummy.stack;

// cleanup
Error.prepareStackTrace = origPST;
Error.stackTraceLimit = origSTL;

// handle filename that starts with "file://"
var fileSchema = 'file://';
if (fileName.indexOf(fileSchema) === 0) {
fileName = fileURLToPath(fileName);
}

return fileName;
};
module.exports = bindings;

/**
* Gets the root directory of a module, given an arbitrary filename
* somewhere in the module tree. The "root directory" is the directory
* containing the `package.json` file.
*
* In: /home/nate/node-native-module/lib/index.js
* Out: /home/nate/node-native-module
* containing either a 'dist' or a 'compiled' directory.
*/

exports.getRoot = function getRoot(file) {
function getRoot(file) {
var dir = dirname(file),
prev;
while (true) {
if (dir === '.') {
// Avoids an infinite loop in rare cases, like the REPL
dir = process.cwd();
}
if (
exists(join(dir, 'package.json')) ||
exists(join(dir, 'node_modules'))
) {
// Found the 'package.json' file or 'node_modules' dir; we're done
if (exists(join(dir, 'dist'))) {
// Found the 'dist' dir; step into it and done
return join(dir, 'dist');
}
if (exists(join(dir, 'compiled'))) {
// Found the 'compiled' dir; we're done
return dir;
}
if (prev === dir) {
// Got to the top
throw new Error(
'Could not find module root given file: "' +
file +
'". Do you have a `package.json` file? '
'". Do you have a `dist` or `compiled` directory? '
);
}
// Try the parent dir next
14 changes: 5 additions & 9 deletions package.json
Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
{
"name": "bindings",
"name": "bundled-bindings",
"description": "Helper module for loading your native module's .node file",
"keywords": [
"native",
@@ -11,18 +11,14 @@
"c++"
],
"version": "1.5.0",
"author": "Nathan Rajlich <[email protected]> (http://tootallnate.net)",
"repository": {
"type": "git",
"url": "git://github.com/TooTallNate/node-bindings.git"
"url": "git://github.com/devm33/node-bindings.git"
},
"main": "./bindings.js",
"bugs": {
"url": "https://github.com/TooTallNate/node-bindings/issues"
"url": "https://github.com/devm33/node-bindings/issues"
},
"homepage": "https://github.com/TooTallNate/node-bindings",
"license": "MIT",
"dependencies": {
"file-uri-to-path": "1.0.0"
}
"homepage": "https://github.com/devm33/node-bindings",
"license": "MIT"
}