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meteor-npm.js
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meteor-npm.js
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/// Implements the process of managing a package's .npm directory,
/// in which we call `npm install` to install npm dependencies,
/// and a variety of related commands. Notably, we use `npm shrinkwrap`
/// to ensure we get consistent versions of npm sub-dependencies.
var Future = require('fibers/future');
var cleanup = require('./cleanup.js');
var files = require('./files.js');
var os = require('os');
var _ = require('underscore');
var httpHelpers = require('./http-helpers.js');
var buildmessage = require('./buildmessage.js');
var utils = require('./utils.js');
var runLog = require('./run-log.js');
var meteorNpm = exports;
// if a user exits meteor while we're trying to create a .npm
// directory, we will have temporary directories that we clean up
var tmpDirs = [];
cleanup.onExit(function () {
_.each(tmpDirs, function (dir) {
if (files.exists(dir))
files.rm_recursive(dir);
});
});
// Exception used internally to gracefully bail out of a npm run if
// something goes wrong
var NpmFailure = function () {};
// Creates a temporary directory in which the new contents of the
// package's .npm directory will be assembled. If all is successful,
// renames that directory back to .npm. Returns true if there are NPM
// dependencies and they are installed without error.
//
// @param npmDependencies {Object} dependencies that should be
// installed, eg {tar: '0.1.6', gcd: '0.0.0'}. If falsey or empty,
// will remove the .npm directory instead.
meteorNpm.updateDependencies = function (packageName,
packageNpmDir,
npmDependencies,
quiet) {
// we make sure to put it beside the original package dir so that
// we can then atomically rename it. we also make sure to
// randomize the name, in case we're bundling this package
// multiple times in parallel.
var newPackageNpmDir = packageNpmDir + '-new-' + utils.randomToken();
if (! npmDependencies || _.isEmpty(npmDependencies)) {
// No NPM dependencies? Delete the .npm directory if it exists (because,
// eg, we used to have NPM dependencies but don't any more). We'd like to
// do this in as atomic a way as possible in case multiple meteor
// instances are trying to make this update in parallel, so we rename the
// directory to something before doing the rm -rf.
try {
files.rename(packageNpmDir, newPackageNpmDir);
} catch (e) {
if (e.code !== 'ENOENT')
throw e;
// It didn't exist, which is exactly what we wanted.
return false;
}
files.rm_recursive(newPackageNpmDir);
return false;
}
try {
// v0.6.0 had a bug that could cause .npm directories to be
// created without npm-shrinkwrap.json
// (https://github.com/meteor/meteor/pull/927). Running your app
// in that state causes consistent "Corrupted .npm directory"
// errors.
//
// If you've reached that state, delete the empty directory and
// proceed.
if (files.exists(packageNpmDir) &&
! files.exists(files.pathJoin(packageNpmDir, 'npm-shrinkwrap.json'))) {
files.rm_recursive(packageNpmDir);
}
if (files.exists(packageNpmDir)) {
// we already nave a .npm directory. update it appropriately with some
// ceremony involving:
// `npm install`, `npm install name@version`, `npm shrinkwrap`
updateExistingNpmDirectory(
packageName, newPackageNpmDir, packageNpmDir, npmDependencies, quiet);
} else {
// create a fresh .npm directory with `npm install
// name@version` and `npm shrinkwrap`
createFreshNpmDirectory(
packageName, newPackageNpmDir, packageNpmDir, npmDependencies, quiet);
}
} catch (e) {
if (e instanceof NpmFailure) {
// Something happened that was out of our control, but wasn't
// exactly unexpected (eg, no such npm package, no internet
// connection). Handle it gracefully.
return false;
}
// Some other exception -- let it propagate.
throw e;
} finally {
if (files.exists(newPackageNpmDir))
files.rm_recursive(newPackageNpmDir);
tmpDirs = _.without(tmpDirs, newPackageNpmDir);
}
return true;
};
// Return true if all of a package's npm dependencies are portable
// (that is, if the node_modules can be copied anywhere and we'd
// expect it to work, rather than containing native extensions that
// were built just for our architecture), else
// false. updateDependencies should first be used to bring
// packageNpmDir up to date.
meteorNpm.dependenciesArePortable = function (packageNpmDir) {
// We use a simple heuristic: we check to see if a package (or any
// of its transitive depedencies) contains any *.node files. .node
// is the extension that signals to Node that it should load a file
// as a shared object rather than as JavaScript, so this should work
// in the vast majority of cases.
var search = function (dir) {
return _.find(files.readdir(dir), function (itemName) {
if (itemName.match(/\.node$/))
return true;
var item = files.pathJoin(dir, itemName);
if (files.lstat(item).isDirectory())
return search(item);
}) || false;
};
return ! search(files.pathJoin(packageNpmDir, 'node_modules'));
};
var makeNewPackageNpmDir = function (newPackageNpmDir) {
// keep track so that we can remove them on process exit
tmpDirs.push(newPackageNpmDir);
files.mkdir_p(newPackageNpmDir);
// create node_modules -- prevent npm install from installing
// to an existing node_modules dir higher up in the filesystem
files.mkdir(files.pathJoin(newPackageNpmDir, 'node_modules'));
// create .gitignore -- node_modules shouldn't be in git since we
// recreate it as needed by using `npm install`. since we use `npm
// shrinkwrap` we're guaranteed to have the same version installed
// each time.
files.writeFile(
files.pathJoin(newPackageNpmDir, '.gitignore'),
['node_modules',
''/*git diff complains without trailing newline*/].join('\n'));
};
var updateExistingNpmDirectory = function (packageName, newPackageNpmDir,
packageNpmDir, npmDependencies,
quiet) {
// sanity check on contents of .npm directory
if (!files.stat(packageNpmDir).isDirectory())
throw new Error("Corrupted .npm directory -- should be a directory: " +
packageNpmDir);
if (!files.exists(files.pathJoin(packageNpmDir, 'npm-shrinkwrap.json')))
throw new Error(
"Corrupted .npm directory -- can't find npm-shrinkwrap.json in " +
packageNpmDir);
// We need to rebuild all node modules when the Node version
// changes, in case there are some binary ones. Technically this is
// racey, but it shouldn't fail very often.
var nodeModulesDir = files.pathJoin(packageNpmDir, 'node_modules');
if (files.exists(nodeModulesDir)) {
var oldNodeVersion;
try {
oldNodeVersion = files.readFile(
files.pathJoin(packageNpmDir, 'node_modules', '.node_version'), 'utf8');
} catch (e) {
if (e.code !== 'ENOENT')
throw e;
// Use the Node version from the last release where we didn't
// drop this file.
oldNodeVersion = 'v0.8.24';
}
if (oldNodeVersion !== currentNodeCompatibilityVersion())
files.rm_recursive(nodeModulesDir);
}
// Make sure node_modules is present (fix for #1761). Prevents npm install
// from installing to an existing node_modules dir higher up in the
// filesystem. node_modules may be absent due to a change in Node version or
// when `meteor add`ing a cloned package for the first time (node_modules is
// excluded by .gitignore)
if (! files.exists(nodeModulesDir))
files.mkdir(nodeModulesDir);
var installedDependenciesTree = getInstalledDependenciesTree(packageNpmDir);
var installedDependencies = treeToDependencies(installedDependenciesTree);
var shrinkwrappedDependenciesTree =
getShrinkwrappedDependenciesTree(packageNpmDir);
var shrinkwrappedDependencies = treeToDependencies(
shrinkwrappedDependenciesTree);
// If we already have the right things installed, life is good.
// XXX this check is wrong: what if we just pulled a commit that
// changes a sub-module in npm-shrinkwrap.json? See #1648 But
// while it might be "correct" to just drop this check we should
// be careful not to make the common case of no changes too
// slow.
if (_.isEqual(installedDependencies, npmDependencies)) {
// OK, so what we have installed matches the top-level dependencies
// specified in `Npm.depends`. But what if we just pulled a change in
// npm-shrinkwrap.json to an indirectly used module version? We'll have to
// compare more carefully. First, normalize the tree (strip irrelevant
// fields and normalize to 'version').
var minimizedInstalled = minimizeDependencyTree(installedDependenciesTree);
// If what we have installed is the same as what we have shrinkwrapped, then
// we're done.
if (_.isEqual(minimizedInstalled, shrinkwrappedDependenciesTree)) {
return;
}
}
if (! quiet)
logUpdateDependencies(packageName, npmDependencies);
var preservedShrinkwrap = {dependencies: {}};
_.each(shrinkwrappedDependencies, function (version, name) {
if (npmDependencies[name] === version) {
// We're not changing this dependency, so copy over its shrinkwrap.
preservedShrinkwrap.dependencies[name] =
shrinkwrappedDependenciesTree.dependencies[name];
}
});
makeNewPackageNpmDir(newPackageNpmDir);
if (!_.isEmpty(preservedShrinkwrap.dependencies)) {
// There are some unchanged packages here. Install from shrinkwrap.
files.writeFile(files.pathJoin(newPackageNpmDir, 'npm-shrinkwrap.json'),
JSON.stringify(preservedShrinkwrap, null, /*legible*/2));
// construct a matching package.json to make `npm install` happy
constructPackageJson(packageName, newPackageNpmDir,
treeToDependencies(preservedShrinkwrap));
// `npm install`
installFromShrinkwrap(newPackageNpmDir);
// delete package.json and npm-shrinkwrap.json
files.unlink(files.pathJoin(newPackageNpmDir, 'package.json'));
files.unlink(files.pathJoin(newPackageNpmDir, 'npm-shrinkwrap.json'));
}
// we may have just installed the shrinkwrapped packages. but let's not
// trust that it actually worked: let's do the rest based on what we
// actually have installed now.
var newInstalledDependencies = getInstalledDependencies(newPackageNpmDir);
// `npm install name@version` for modules that need updating
_.each(npmDependencies, function (version, name) {
if (newInstalledDependencies[name] !== version) {
installNpmModule(name, version, newPackageNpmDir);
}
});
completeNpmDirectory(packageName, newPackageNpmDir, packageNpmDir,
npmDependencies);
};
var createFreshNpmDirectory = function (packageName, newPackageNpmDir,
packageNpmDir, npmDependencies, quiet) {
if (! quiet)
logUpdateDependencies(packageName, npmDependencies);
makeNewPackageNpmDir(newPackageNpmDir);
// install dependencies
_.each(npmDependencies, function (version, name) {
installNpmModule(name, version, newPackageNpmDir);
});
completeNpmDirectory(packageName, newPackageNpmDir, packageNpmDir,
npmDependencies);
};
// Shared code for updateExistingNpmDirectory and createFreshNpmDirectory.
var completeNpmDirectory = function (packageName, newPackageNpmDir,
packageNpmDir, npmDependencies) {
// temporarily construct a matching package.json to make `npm
// shrinkwrap` happy
constructPackageJson(packageName, newPackageNpmDir, npmDependencies);
// Create a shrinkwrap file.
shrinkwrap(newPackageNpmDir);
// now delete package.json
files.unlink(files.pathJoin(newPackageNpmDir, 'package.json'));
createReadme(newPackageNpmDir);
createNodeVersion(newPackageNpmDir);
files.renameDirAlmostAtomically(newPackageNpmDir, packageNpmDir);
};
var createReadme = function (newPackageNpmDir) {
// This file gets checked in to version control by users, so resist the
// temptation to make unnecessary tweaks to it.
files.writeFile(
files.pathJoin(newPackageNpmDir, 'README'),
"This directory and the files immediately inside it are automatically generated\n" +
"when you change this package's NPM dependencies. Commit the files in this\n" +
"directory (npm-shrinkwrap.json, .gitignore, and this README) to source control\n" +
"so that others run the same versions of sub-dependencies.\n" +
"\n" +
"You should NOT check in the node_modules directory that Meteor automatically\n" +
"creates; if you are using git, the .gitignore file tells git to ignore it.\n"
);
};
var createNodeVersion = function (newPackageNpmDir) {
files.writeFile(
files.pathJoin(newPackageNpmDir, 'node_modules', '.node_version'),
currentNodeCompatibilityVersion());
};
// This value should change whenever we think that the Node C ABI has changed
// (ie, when we need to be sure to reinstall npm packages because they might
// have native components that need to be rebuilt). It does not need to change
// for every patch release of Node! Notably, it needed to change between 0.8.*
// and 0.10.*. If Node does make a patch release of 0.10 that breaks
// compatibility, you can just change this from "0.10.*" to "0.10.35" or
// whatever.
var currentNodeCompatibilityVersion = function () {
var version = process.version;
version = version.replace(/\.(\d+)$/, '.*');
return version + '\n';
};
var runNpmCommand = function (args, cwd) {
var npmPath;
var nodeBinDir;
if (os.platform() === "win32") {
npmPath = files.convertToOSPath(
files.pathJoin(files.getDevBundle(), "bin", "npm.cmd"));
nodeBinDir = files.convertToOSPath(
files.pathJoin(files.getDevBundle(), "bin"));
} else {
npmPath = files.pathJoin(files.getDevBundle(), "bin", "npm");
nodeBinDir = files.pathJoin(files.getDevBundle(), "bin");
}
if (meteorNpm._printNpmCalls) // only used by test-bundler.js
process.stdout.write('cd ' + cwd + ' && ' + npmPath + ' ' +
args.join(' ') + ' ...\n');
if (cwd)
cwd = files.convertToOSPath(cwd);
var env = process.env;
// It looks like some npm commands (such as build commands, specifically on
// Windows) rely on having a global node binary present.
// Sometimes users have a global node installed, so it is not
// a problem, but a) it can be outdated and b) it can not be installed.
// To solve this problem, we set the PATH env variable to have the path
// containing the node binary we are running in right now as the highest
// priority.
// This hack is confusing as npm is supposed to do it already.
var pathDecomposed = (env.PATH || "").split(files.pathOsDelimiter);
pathDecomposed.unshift(nodeBinDir);
env.PATH = pathDecomposed.join(files.pathOsDelimiter);
var opts = { cwd: cwd, env: env, maxBuffer: 10 * 1024 * 1024 };
var future = new Future;
var child_process = require('child_process');
child_process.execFile(
npmPath, args, opts, function (err, stdout, stderr) {
if (meteorNpm._printNpmCalls)
process.stdout.write(err ? 'failed\n' : 'done\n');
future.return({
success: ! err,
stdout: stdout,
stderr: stderr
});
});
return future.wait();
}
var constructPackageJson = function (packageName, newPackageNpmDir,
npmDependencies) {
var packageJsonContents = JSON.stringify({
// name and version are unimportant but required for `npm install`.
// we used to put packageName in here, but it doesn't work when that
// has colons.
name: 'packages-for-meteor-smartpackage-' + utils.randomToken(),
version: '0.0.0',
dependencies: npmDependencies
});
var packageJsonPath = files.pathJoin(newPackageNpmDir, 'package.json');
files.writeFile(packageJsonPath, packageJsonContents);
};
// Gets a JSON object from `npm ls --json` (getInstalledDependenciesTree) or
// `npm-shrinkwrap.json` (getShrinkwrappedDependenciesTree).
//
// @returns {Object} eg {
// "name": "packages",
// "version": "0.0.0",
// "dependencies": {
// "sockjs": {
// "version": "0.3.4",
// "dependencies": {
// "node-uuid": {
// "version": "1.3.3"
// }
// }
// }
// }
// }
var getInstalledDependenciesTree = function (dir) {
var result = runNpmCommand(["ls", "--json"], dir);
if (result.success)
return JSON.parse(result.stdout);
// XXX include this in the buildmessage.error instead
runLog.log(result.stderr);
buildmessage.error("couldn't read npm version lock information");
// Recover by returning false from updateDependencies
throw new NpmFailure;
};
var getShrinkwrappedDependenciesTree = function (dir) {
var shrinkwrapFile = files.readFile(files.pathJoin(dir, 'npm-shrinkwrap.json'));
return JSON.parse(shrinkwrapFile);
};
// Maps a "dependency object" (a thing you find in `npm ls --json` or
// npm-shrinkwrap.json with keys like "version" and "from") to the
// canonical version that matches what users put in the `Npm.depends`
// clause. ie, either the version or the tarball URL.
//
// If more logic is added here, it should probably go in minimizeModule too.
var canonicalVersion = function (depObj) {
if (utils.isUrlWithSha(depObj.from))
return depObj.from;
else
return depObj.version;
};
// map the structure returned from `npm ls` or shrinkwrap.json into
// the structure of npmDependencies (e.g. {gcd: '0.0.0'}), so that
// they can be diffed. This only returns top-level dependencies.
var treeToDependencies = function (tree) {
return _.object(
_.map(
tree.dependencies, function (properties, name) {
return [name, canonicalVersion(properties)];
}));
};
var getInstalledDependencies = function (dir) {
return treeToDependencies(getInstalledDependenciesTree(dir));
};
// (appears to not be called)
var getShrinkwrappedDependencies = function (dir) {
return treeToDependencies(getShrinkwrappedDependenciesTree(dir));
};
var installNpmModule = function (name, version, dir) {
ensureConnected();
var installArg = utils.isUrlWithSha(version)
? version : (name + "@" + version);
// We don't use npm.commands.install since we couldn't figure out
// how to silence all output (specifically the installed tree which
// is printed out with `console.log`)
//
// We used to use --force here, because the NPM cache is broken! See
// https://github.com/npm/npm/issues/3265 Basically, switching
// back and forth between a tarball fork of version X and the real
// version X could confuse NPM. But the main reason to use tarball
// URLs is to get a fork of the latest version with some fix, so
// it was easy to trigger this!
//
// We now use a forked version of npm with our PR
// https://github.com/npm/npm/pull/5137 to work around this.
var result = runNpmCommand(["install", installArg], dir);
if (! result.success) {
var pkgNotFound = "404 '" + utils.quotemeta(name) +
"' is not in the npm registry";
var versionNotFound = "version not found: " + utils.quotemeta(name) +
'@' + utils.quotemeta(version);
if (result.stderr.match(new RegExp(pkgNotFound))) {
buildmessage.error("there is no npm package named '" + name + "'");
} else if (result.stderr.match(new RegExp(versionNotFound))) {
buildmessage.error(name + " version " + version + " " +
"is not available in the npm registry");
} else {
// XXX include this in the buildmessage.error instead
runLog.log(result.stderr);
buildmessage.error("couldn't install npm package");
}
// Recover by returning false from updateDependencies
throw new NpmFailure;
}
if (process.platform !== "win32") {
// If we are on a unixy file system, we should not build a package that
// can't be used on Windows.
var pathsWithColons = files.findPathsWithRegex(".", new RegExp(":"),
{ cwd: files.pathJoin(dir, "node_modules") });
if (pathsWithColons.length) {
var firstTen = pathsWithColons.slice(0, 10);
if (pathsWithColons.length > 10) {
firstTen.push("... " + (pathsWithColons.length - 10) +
" paths omitted.");
}
buildmessage.error(
"Some filenames in your package have invalid characters.\n" +
"The following file paths in the NPM module '" + name + "' have colons, ':', which won't work on Windows:\n" +
firstTen.join("\n"));
throw new NpmFailure;
}
}
};
var installFromShrinkwrap = function (dir) {
if (! files.exists(files.pathJoin(dir, "npm-shrinkwrap.json")))
throw new Error(
"Can't call `npm install` without a npm-shrinkwrap.json file present");
ensureConnected();
// `npm install`, which reads npm-shrinkwrap.json.
var result = runNpmCommand(["install"], dir);
if (! result.success) {
// XXX include this in the buildmessage.error instead
runLog.log(result.stderr);
buildmessage.error("couldn't install npm packages from npm-shrinkwrap");
// Recover by returning false from updateDependencies
throw new NpmFailure;
}
};
// ensure we can reach http://npmjs.org before we try to install
// dependencies. `npm install` times out after more than a minute.
var ensureConnected = function () {
try {
httpHelpers.getUrl("http://registry.npmjs.org");
} catch (e) {
buildmessage.error("Can't install npm dependencies. " +
"Are you connected to the internet?");
// Recover by returning false from updateDependencies
throw new NpmFailure;
}
};
// `npm shrinkwrap`
var shrinkwrap = function (dir) {
// We don't use npm.commands.shrinkwrap for two reasons:
// 1. As far as we could tell there's no way to completely silence the output
// (the `silent` flag isn't piped in to the call to npm.commands.ls)
// 2. In various (non-deterministic?) cases we observed the
// npm-shrinkwrap.json file not being updated
var result = runNpmCommand(["shrinkwrap"], dir);
if (! result.success) {
// XXX include this in the buildmessage.error instead
runLog.log(result.stderr);
buildmessage.error("couldn't run `npm shrinkwrap`");
// Recover by returning false from updateDependencies
throw new NpmFailure;
}
minimizeShrinkwrap(dir);
};
// The shrinkwrap file format contains a lot of extra data that can
// change as you re-run the NPM-update process without actually
// affecting what is installed. This step trims everything but the
// most important bits from the file, so that the file doesn't change
// unnecessary.
//
// This is based on an analysis of install.js in the npm module:
// https://github.com/isaacs/npm/blob/master/lib/install.js
// It appears that the only things actually read from a given
// dependency are its sub-dependencies and a single version, which is
// read by the readWrap function; and furthermore, we can just put all
// versions in the "version" field.
var minimizeShrinkwrap = function (dir) {
var topLevel = getShrinkwrappedDependenciesTree(dir);
var minimized = minimizeDependencyTree(topLevel);
files.writeFile(
files.pathJoin(dir, 'npm-shrinkwrap.json'),
// Matches the formatting done by 'npm shrinkwrap'.
JSON.stringify(minimized, null, 2) + '\n');
};
// Reduces a dependency tree (as read from a just-made npm-shrinkwrap.json or
// from npm ls --json) to just the versions we want. Returns an object that does
// not share state with its input
var minimizeDependencyTree = function (tree) {
var minimizeModule = function (module) {
var version;
if (module.resolved &&
!module.resolved.match(/^https:\/\/registry.npmjs.org\//)) {
version = module.resolved;
} else if (utils.isUrlWithSha(module.from)) {
version = module.from;
} else {
version = module.version;
}
var minimized = {version: version};
if (module.dependencies) {
minimized.dependencies = {};
_.each(module.dependencies, function (subModule, name) {
minimized.dependencies[name] = minimizeModule(subModule);
});
}
return minimized;
};
var newTopLevelDependencies = {};
_.each(tree.dependencies, function (module, name) {
newTopLevelDependencies[name] = minimizeModule(module);
});
return {dependencies: newTopLevelDependencies};
};
var logUpdateDependencies = function (packageName, npmDependencies) {
runLog.log(packageName + ': updating npm dependencies -- ' +
_.keys(npmDependencies).join(', ') + '...');
};
exports.runNpmCommand = runNpmCommand;