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193 lines (156 loc) · 4.89 KB
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// Core Node.js modules.
var os = require('os');
var fs = require('fs');
var path = require('path');
var zlib = require('zlib');
var exec = require('child_process').exec;
// Third-party modules.
var Q = require('q');
var request = require('request');
var tar = require('tar');
var which = require('which');
var rimraf = require('rimraf');
// This will take in an object and find any matching keys in the environment
// to use as overrides.
//
// ENV variables:
//
// PKG: Location of `package.json` sans `.json`.
// LIBGIT2: Location of libgit2 source.
// BUILD: Location of nodegit build directory.
function envOverride(obj) {
// Look through all keys.
return Object.keys(obj).reduce(function(obj, key) {
var normalize = key.toUpperCase();
// Check for process environment existence.
if (normalize in process.env) {
obj[key] = process.env[normalize];
}
return obj;
}, obj);
}
// Convert to the correct system path.
function systemPath(parts) {
return parts.join(path.sep);
}
// Will be used near the end to configure `node-gyp`.
var python, cmake;
// Common reusable paths that can be overwritten by environment variables.
var paths = envOverride({
pkg: __dirname + '/package',
libgit2: __dirname + '/vendor/libgit2/',
build: __dirname + '/vendor/libgit2/build/',
});
// Load the package.json.
var pkg = require(paths.pkg);
// Ensure all dependencies are available.
var dependencies = Q.allSettled([
// This will prioritize `python2` over `python`, because we always want to
// work with Python 2.* if it's available.
Q.nfcall(which, 'python2'),
Q.nfcall(which, 'python'),
// Check for any version of CMake.
Q.nfcall(which, 'cmake'),
])
// Determine if all the dependency requirements are met.
.then(function(results) {
console.info('[nodegit] Determining dependencies.');
// Assign to reusable variables.
python = results[0].value || results[1].value;
cmake = results[2].value;
// Missing Python.
if (!python) {
throw new Error('Python is required to build libgit2.');
}
// Missing CMake.
if (!cmake) {
throw new Error('CMake is required to build libgit2.');
}
// Now lets check the Python version to ensure it's < 3.
return Q.nfcall(exec, python + ' --version').then(function(version) {
if (version[1].indexOf('Python 3') === 0) {
throw new Error('Incorrect version of Python, gyp requires < 3.');
}
});
})
// Successfully found all dependencies. First step is to clean the vendor
// directory.
.then(function() {
console.info('[nodegit] Removing vendor/libgit2.');
return Q.ninvoke(rimraf, null, paths.libgit2);
})
// Now fetch the libgit2 source from GitHub.
.then(function() {
console.info('[nodegit] Fetching vendor/libgit2.');
var url = 'https://github.com/libgit2/libgit2/tarball/' + pkg.libgit2;
var extract = tar.Extract({
path: paths.libgit2,
strip: true
});
// First extract from Zlib and then extract from Tar.
var expand = request.get(url).pipe(zlib.createUnzip()).pipe(extract);
return Q.ninvoke(expand, 'on', 'end');
})
// Fetch completed successfully.
.then(function() {
console.info('[nodegit] Creating vendor/libgit2/build.');
return Q.ninvoke(fs, 'mkdir', paths.build);
})
// Configure libgit2 using cmake.
.then(function() {
console.info('[nodegit] Configuring libgit2.');
// Minimum flags necessary to configure in sane environments.
var flags = ['-DTHREADSAFE=ON', '-DBUILD_CLAR=OFF'];
// Windows flags.
if (process.platform === 'win32') {
flags.push.apply(flags, [
'-DSTDCALL=OFF',
'-DBUILD_SHARED_LIBS=OFF',
'-DCMAKE_C_FLAGS=-fPIC',
'-DCMAKE_BUILD_TYPE=RelWithDebInfo'
]);
// If the architecture is 64bit, have to change the generator.
if (os.arch() === 'x64') {
flags.push('-G "Visual Studio 12 Win64"');
}
}
return Q.nfcall(exec, 'cmake .. ' + flags.join(' '), {
cwd: paths.build
});
})
// Build libgit2 using cmake.
.then(function() {
console.info('[nodegit] Building libgit2.');
return Q.nfcall(exec, 'cmake --build .', {
cwd: paths.build
});
})
// Configure the native module using node-gyp.
.then(function() {
console.info('[nodegit] Configuring native node module.');
return Q.nfcall(exec, systemPath([
'.', 'node_modules', '.bin', 'node-gyp configure --python ' + python
]), {
cwd: '.'
});
})
// Build the native module using node-gyp.
.then(function() {
console.info('[nodegit] Building native node module.');
return Q.nfcall(exec, systemPath([
'.', 'node_modules', '.bin', 'node-gyp build'
]), {
cwd: '.',
maxBuffer: Number.MAX_VALUE
});
})
// Display a success message.
.then(function() {
console.info('[nodegit] Completed installation successfully.');
})
// Display a warning message about failing to build native node module.
.fail(function(message) {
console.info('[nodegit] Failed to build nodegit.');
console.info(message.message);
console.info(message.stack);
});