var cp = require("child_process");

var path = require("path");

var rooted = path.join.bind(path, __dirname, "..");

module.exports = function retrieveExternalDependencies() {

if (process.platform === "win32") {

return Promise.resolve("");

}

return new Promise(function(resolve, reject) {

console.info("[nodegit] Configuring libssh2.");

var opensslDir = rooted("vendor/openssl/openssl");

var newEnv = {};

Object.keys(process.env).forEach(function(key) {

newEnv[key] = process.env[key];

});

newEnv.CPPFLAGS = newEnv.CPPFLAGS || "";

newEnv.CPPFLAGS += " -I" + path.join(opensslDir, "include");

newEnv.CPPFLAGS = newEnv.CPPFLAGS.trim();

cp.exec(

rooted("vendor/libssh2/configure") +

" --with-libssl-prefix=" + opensslDir,

{cwd: rooted("vendor/libssh2/"), env: newEnv},

function(err, stdout, stderr) {

if (err) {

console.error(err);

console.error(stderr);

reject(err, stderr);

}

else {

resolve(stdout);

}

}

);

});

};

// Called on the command line

if (require.main === module) {

if (process.platform === "win32") {

console.log("nothing to do");

}

else {

module.exports().done();

}

}