374 lines
11 KiB
JavaScript
374 lines
11 KiB
JavaScript
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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/*
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* Copyright 2015 Joyent, Inc.
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*/
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/*
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* This module provides functions to read and write (a) a TritonApi config
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* and (b) TritonApi profiles.
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*
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* The config is a JSON object loaded from "etc/defaults.json" (shipped with
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* node-triton) plus possibly overrides from "$configDir/config.json" --
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* which is "~/.triton/config.json" for the `triton` CLI. The config has
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* a strict set of allowed keys.
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*
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* A profile is a small object that includes the necessary info for talking
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* to a CloudAPI. E.g.:
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* {
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* "name": "east1",
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* "account": "billy.bob",
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* "keyId": "de:e7:73:9a:aa:91:bb:3e:72:8d:cc:62:ca:58:a2:ec",
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* "url": "https://us-east-1.api.joyent.com"
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* }
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*
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* Profiles are stored as separate JSON files in
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* "$configDir/profiles.d/$name.json". Typically `triton profiles ...` is
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* used to manage them. In addition there is the special "env" profile that
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* is constructed from the "SDC_*" environment variables.
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*/
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var assert = require('assert-plus');
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var format = require('util').format;
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var fs = require('fs');
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var mkdirp = require('mkdirp');
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var path = require('path');
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var vasync = require('vasync');
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var common = require('./common');
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var errors = require('./errors');
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var DEFAULTS_PATH = path.resolve(__dirname, '..', 'etc', 'defaults.json');
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var OVERRIDE_NAMES = []; // config object keys to do a one-level deep override
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// TODO: use this const to create the "Configuration" docs table.
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var CONFIG_VAR_NAMES = [
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'profile',
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'cacheDir'
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];
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// TODO: use this to create a profile doc table?
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var PROFILE_FIELDS = {
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name: true,
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url: true,
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account: true,
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keyId: true,
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insecure: true,
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user: true
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};
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// --- internal support stuff
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function configPathFromDir(configDir) {
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return path.resolve(configDir, 'config.json');
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}
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// --- Config
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/**
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* Load the TritonApi config. This is a merge of the built-in "defaults" (at
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* etc/defaults.json) and the "user" config (at "$configDir/config.json",
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* typically "~/.triton/config.json", if it exists).
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*
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* This includes some internal data on keys with a leading underscore:
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* _defaults the defaults.json object
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* _user the "user" config.json object
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* _configDir the user config dir
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*
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* @returns {Object} The loaded config.
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*/
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function loadConfig(opts) {
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assert.object(opts, 'opts');
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assert.string(opts.configDir, 'opts.configDir');
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var configDir = common.tildeSync(opts.configDir);
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var configPath = configPathFromDir(configDir);
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var c = fs.readFileSync(DEFAULTS_PATH, 'utf8');
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var _defaults = JSON.parse(c);
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var config = JSON.parse(c);
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if (fs.existsSync(configPath)) {
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c = fs.readFileSync(configPath, 'utf8');
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var _user = JSON.parse(c);
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var userConfig = JSON.parse(c);
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if (typeof (userConfig) !== 'object' || Array.isArray(userConfig)) {
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throw new errors.ConfigError(
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format('"%s" is not an object', configPath));
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}
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// These special keys are merged into the key of the same name in the
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// base "defaults.json".
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Object.keys(userConfig).forEach(function (key) {
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if (~OVERRIDE_NAMES.indexOf(key) && config[key] !== undefined) {
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Object.keys(userConfig[key]).forEach(function (subKey) {
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if (userConfig[key][subKey] === null) {
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delete config[key][subKey];
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} else {
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config[key][subKey] = userConfig[key][subKey];
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}
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});
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} else {
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config[key] = userConfig[key];
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}
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});
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config._user = _user;
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}
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config._defaults = _defaults;
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config._configDir = configDir;
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return config;
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}
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function setConfigVar(opts, cb) {
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assert.object(opts, 'opts');
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assert.string(opts.configDir, 'opts.configDir');
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assert.string(opts.name, 'opts.name');
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assert.string(opts.value, 'opts.value');
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assert.ok(opts.name.indexOf('.') === -1,
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'dotted config name not yet supported');
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assert.ok(CONFIG_VAR_NAMES.indexOf(opts.name) !== -1,
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'unknown config var name: ' + opts.name);
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var configPath = configPathFromDir(opts.configDir);
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var config;
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vasync.pipeline({funcs: [
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function loadExisting(_, next) {
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fs.exists(configPath, function (exists) {
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if (!exists) {
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config = {};
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return next();
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}
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fs.readFile(configPath, function (err, data) {
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if (err) {
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return next(err);
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}
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try {
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config = JSON.parse(data);
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} catch (e) {
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return next(e);
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}
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next();
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});
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});
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},
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function mkConfigDir(_, next) {
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fs.exists(opts.configDir, function (exists) {
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if (!exists) {
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mkdirp(opts.configDir, next);
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} else {
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next();
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}
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});
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},
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function updateAndSave(_, next) {
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config[opts.name] = opts.value;
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fs.writeFile(configPath, JSON.stringify(config, null, 4), next);
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}
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]}, cb);
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}
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// --- Profiles
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function validateProfile(profile, profilePath) {
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assert.object(profile, 'profile');
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assert.optionalString(profilePath, 'profilePath');
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try {
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assert.string(profile.name, 'profile.name');
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assert.string(profile.url, 'profile.url');
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assert.string(profile.account, 'profile.account');
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assert.string(profile.keyId, 'profile.keyId');
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assert.optionalBool(profile.insecure, 'profile.insecure');
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assert.optionalString(profile.user, 'profile.user');
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} catch (err) {
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throw new errors.ConfigError(err.message);
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}
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var bogusFields = [];
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Object.keys(profile).forEach(function (field) {
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if (!PROFILE_FIELDS[field]) {
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bogusFields.push(field);
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}
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});
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if (bogusFields.length) {
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throw new errors.ConfigError(format(
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'extraneous fields in "%s" profile: %s%s', profile.name,
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(profilePath ? profilePath + ': ' : ''), bogusFields.join(', ')));
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}
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}
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/**
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* Load the special 'env' profile, which handles details of getting
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* values from envvars. Typically we'd piggyback on dashdash's env support
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* <https://github.com/trentm/node-dashdash#environment-variable-integration>.
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* However, per the "Environment variable integration" comment in cli.js, we
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* do that manually.
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*
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* @returns {Object} The 'env' profile.
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*/
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function _loadEnvProfile() {
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var envProfile = {
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name: 'env'
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};
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envProfile.account = process.env.TRITON_ACCOUNT || process.env.SDC_ACCOUNT;
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var user = process.env.TRITON_USER || process.env.SDC_USER;
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if (user) {
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envProfile.user = user;
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}
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envProfile.url = process.env.TRITON_URL || process.env.SDC_URL;
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envProfile.keyId = process.env.TRITON_KEY_ID || process.env.SDC_KEY_ID;
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if (process.env.TRITON_TLS_INSECURE) {
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envProfile.insecure = common.boolFromString(
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process.env.TRITON_TLS_INSECURE);
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} else if (process.env.SDC_TLS_INSECURE) {
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envProfile.insecure = common.boolFromString(
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process.env.SDC_TLS_INSECURE);
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} else if (process.env.SDC_TESTING) { // deprecated
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envProfile.insecure = common.boolFromString(process.env.SDC_TESTING);
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}
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validateProfile(envProfile);
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return envProfile;
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}
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function _profileFromPath(profilePath, name) {
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if (! fs.existsSync(profilePath)) {
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throw new errors.ConfigError('no such profile: ' + name);
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}
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var profile;
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try {
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profile = JSON.parse(fs.readFileSync(profilePath, 'utf8'));
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} catch (e) {
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throw new errors.ConfigError(e, format(
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'error in "%s" profile: %s: %s', name,
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profilePath, e.message));
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}
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if (profile.name) {
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throw new errors.ConfigError(format(
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'error in "%s" profile: %s: file must not include "name" field',
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name, profilePath));
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}
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profile.name = name;
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validateProfile(profile, profilePath);
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return profile;
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}
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function loadProfile(opts) {
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assert.string(opts.name, 'opts.name');
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assert.optionalString(opts.configDir, 'opts.configDir');
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if (opts.name === 'env') {
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return _loadEnvProfile();
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} else if (!opts.configDir) {
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throw new errors.TritonError(
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'cannot load profiles (other than "env") without `opts.configDir`');
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} else {
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var profilePath = path.resolve(
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common.tildeSync(opts.configDir), 'profiles.d',
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opts.name + '.json');
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return _profileFromPath(profilePath, opts.name);
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}
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}
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function loadAllProfiles(opts) {
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assert.string(opts.configDir, 'opts.configDir');
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assert.object(opts.log, 'opts.log');
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var profiles = [
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_loadEnvProfile()
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];
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var d = path.join(common.tildeSync(opts.configDir), 'profiles.d');
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var files = fs.readdirSync(d);
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files.forEach(function (file) {
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file = path.join(d, file);
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var ext = path.extname(file);
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if (ext !== '.json')
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return;
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var name = path.basename(file).slice(0, - path.extname(file).length);
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if (name.toLowerCase() === 'env') {
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// Skip the special 'env'.
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opts.log.warn({profilePath: file},
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'invalid "env" profile; skipping');
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return;
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}
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try {
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profiles.push(_profileFromPath(file, name));
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} catch (e) {
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opts.log.warn({err: e, profilePath: file},
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'error loading profile; skipping');
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}
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});
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return profiles;
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}
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function deleteProfile(opts) {
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assert.string(opts.configDir, 'opts.configDir');
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assert.string(opts.name, 'opts.name');
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if (opts.name === 'env') {
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throw new Error('cannot delete "env" profile');
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}
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var profilePath = path.resolve(opts.configDir, 'profiles.d',
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opts.name + '.json');
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fs.unlinkSync(profilePath);
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}
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function saveProfileSync(opts) {
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assert.string(opts.configDir, 'opts.configDir');
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assert.object(opts.profile, 'opts.profile');
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var name = opts.profile.name;
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if (name === 'env') {
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throw new Error('cannot save "env" profile');
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}
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validateProfile(opts.profile);
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var toSave = common.objCopy(opts.profile);
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delete toSave.name;
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var profilePath = path.resolve(opts.configDir, 'profiles.d',
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name + '.json');
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fs.writeFileSync(profilePath, JSON.stringify(toSave, null, 4), 'utf8');
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console.log('Saved profile "%s"', name);
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}
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//---- exports
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module.exports = {
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loadConfig: loadConfig,
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setConfigVar: setConfigVar,
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validateProfile: validateProfile,
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loadProfile: loadProfile,
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loadAllProfiles: loadAllProfiles,
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deleteProfile: deleteProfile,
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saveProfileSync: saveProfileSync
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};
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// vim: set softtabstop=4 shiftwidth=4:
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