mirror of
https://github.com/balena-io/balena-cli.git
synced 2024-12-19 05:37:51 +00:00
443 lines
15 KiB
TypeScript
443 lines
15 KiB
TypeScript
/**
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* @license
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* Copyright 2016-2019 Balena Ltd.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { flags } from '@oclif/command';
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import type * as SDK from 'balena-sdk';
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import * as _ from 'lodash';
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import Command from '../command';
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import { ExpectedError } from '../errors';
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import * as cf from '../utils/common-flags';
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import { getBalenaSdk, getVisuals, stripIndent } from '../utils/lazy';
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import { CommandHelp } from '../utils/oclif-utils';
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import { isV12 } from '../utils/version';
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interface FlagsDef {
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all?: boolean; // whether to include application-wide, device-wide variables //TODO: REMOVE
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application?: string; // application name
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config: boolean;
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device?: string; // device UUID
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json: boolean;
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help: void;
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service?: string; // service name
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verbose: boolean;
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}
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interface EnvironmentVariableInfo extends SDK.EnvironmentVariableBase {
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appName?: string | null; // application name
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deviceUUID?: string; // device UUID
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serviceName?: string; // service name
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}
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interface DeviceServiceEnvironmentVariableInfo
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extends SDK.DeviceServiceEnvironmentVariable {
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appName?: string; // application name
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deviceUUID?: string; // device UUID
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serviceName?: string; // service name
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}
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interface ServiceEnvironmentVariableInfo
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extends SDK.ServiceEnvironmentVariable {
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appName?: string; // application name
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deviceUUID?: string; // device UUID
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serviceName?: string; // service name
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}
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export default class EnvsCmd extends Command {
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public static description = isV12()
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? stripIndent`
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List the environment or config variables of an application, device or service.
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List the environment or configuration variables of an application, device or
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service, as selected by the respective command-line options. (A service is
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an application container in a "microservices" application.)
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The results include application-wide (fleet), device-wide (multiple services on
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a device) and service-specific variables that apply to the selected application,
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device or service. It can be thought of as including "inherited" variables;
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for example, a service inherits device-wide variables, and a device inherits
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application-wide variables.
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The printed output may include DEVICE and/or SERVICE columns to distinguish
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between application-wide, device-specific and service-specific variables.
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An asterisk in these columns indicates that the variable applies to
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"all devices" or "all services".
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The --config option is used to list "configuration variables" that control
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balena platform features, as opposed to custom environment variables defined
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by the user. The --config and the --service options are mutually exclusive
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because configuration variables cannot be set for specific services.
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The --json option is recommended when scripting the output of this command,
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because the JSON format is less likely to change and it better represents data
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types like lists and empty strings. The 'jq' utility may be helpful in shell
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scripts (https://stedolan.github.io/jq/manual/). When --json is used, an empty
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JSON array ([]) is printed instead of an error message when no variables exist
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for the given query. When querying variables for a device, note that the
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application name may be null in JSON output (or 'N/A' in tabular output) if the
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application linked to the device is no longer accessible by the current user
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(for example, in case the current user has been removed from the application
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by its owner).
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`
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: stripIndent`
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List the environment or config variables of an application, device or service.
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List the environment or configuration variables of an application, device or
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service, as selected by the respective command-line options. (A service is
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an application container in a "microservices" application.)
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The --config option is used to list "configuration variables" that control
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balena platform features, as opposed to custom environment variables defined
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by the user. The --config and the --service options are mutually exclusive
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because configuration variables cannot be set for specific services.
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The --all option is used to include application-wide (fleet), device-wide
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(multiple services on a device) and service-specific variables that apply to
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the selected application, device or service. It can be thought of as including
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"inherited" variables: for example, a service inherits device-wide variables,
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and a device inherits application-wide variables. Variables are still filtered
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out by type with the --config option, such that configuration and non-
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configuration variables are never listed together.
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When the --all option is used, the printed output may include DEVICE and/or
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SERVICE columns to distinguish between application-wide, device-specific and
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service-specific variables. An asterisk in these columns indicates that the
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variable applies to "all devices" or "all services".
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The --json option is recommended when scripting the output of this command,
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because the JSON format is less likely to change and it better represents data
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types like lists and empty strings. The 'jq' utility may be helpful in shell
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scripts (https://stedolan.github.io/jq/manual/). When --json is used, an empty
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JSON array ([]) is printed instead of an error message when no variables exist
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for the given query. When querying variables for a device, note that the
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application name may be null in JSON output (or 'N/A' in tabular output) if the
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application linked to the device is no longer accessible by the current user
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(for example, in case the current user has been removed from the application
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by its owner).
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`;
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public static examples = isV12()
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? [
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'$ balena envs --application MyApp',
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'$ balena envs --application MyApp --json',
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'$ balena envs --application MyApp --service MyService',
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'$ balena envs --application MyApp --service MyService',
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'$ balena envs --application MyApp --config',
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'$ balena envs --device 7cf02a6',
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'$ balena envs --device 7cf02a6 --json',
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'$ balena envs --device 7cf02a6 --config --json',
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'$ balena envs --device 7cf02a6 --service MyService',
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]
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: [
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'$ balena envs --application MyApp',
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'$ balena envs --application MyApp --all --json',
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'$ balena envs --application MyApp --service MyService',
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'$ balena envs --application MyApp --all --service MyService',
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'$ balena envs --application MyApp --config',
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'$ balena envs --device 7cf02a6',
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'$ balena envs --device 7cf02a6 --all --json',
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'$ balena envs --device 7cf02a6 --config --all --json',
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'$ balena envs --device 7cf02a6 --all --service MyService',
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];
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public static usage = (
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'envs ' + new CommandHelp({ args: EnvsCmd.args }).defaultUsage()
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).trim();
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public static flags: flags.Input<FlagsDef> = {
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...(isV12()
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? {
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all: flags.boolean({
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description: stripIndent`
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No-op since balena CLI v12.0.0.`,
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hidden: true,
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}),
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}
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: {
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all: flags.boolean({
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description: stripIndent`
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include app-wide, device-wide variables that apply to the selected device or service.
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Variables are still filtered out by type with the --config option.`,
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}),
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}),
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application: { exclusive: ['device'], ...cf.application },
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config: flags.boolean({
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char: 'c',
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description: 'show configuration variables only',
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exclusive: ['service'],
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}),
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device: { exclusive: ['application'], ...cf.device },
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help: cf.help,
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json: flags.boolean({
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char: 'j',
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description: 'produce JSON output instead of tabular output',
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}),
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verbose: cf.verbose,
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service: { exclusive: ['config'], ...cf.service },
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};
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public async run() {
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const { flags: options } = this.parse<FlagsDef, {}>(EnvsCmd);
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const variables: EnvironmentVariableInfo[] = [];
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options.all = options.all || isV12();
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await Command.checkLoggedIn();
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if (!options.application && !options.device) {
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throw new ExpectedError('You must specify an application or device');
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}
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const balena = getBalenaSdk();
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let appName = options.application;
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let fullUUID: string | undefined; // as oppposed to the short, 7-char UUID
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if (options.device) {
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const { getDeviceAndMaybeAppFromUUID } = await import('../utils/cloud');
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const [device, app] = await getDeviceAndMaybeAppFromUUID(
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balena,
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options.device,
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['uuid'],
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['app_name'],
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);
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fullUUID = device.uuid;
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if (app) {
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appName = app.app_name;
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}
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}
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if (appName && options.service) {
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await validateServiceName(balena, options.service, appName);
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}
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if (options.application || options.all) {
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variables.push(...(await getAppVars(balena, appName, options)));
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}
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if (fullUUID) {
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variables.push(
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...(await getDeviceVars(balena, fullUUID, appName, options)),
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);
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}
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if (!options.json && variables.length === 0) {
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const target =
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(options.service ? `service "${options.service}" of ` : '') +
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(options.application
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? `application "${options.application}"`
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: `device "${options.device}"`);
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throw new ExpectedError(`No environment variables found for ${target}`);
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}
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await this.printVariables(variables, options);
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}
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protected async printVariables(
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varArray: EnvironmentVariableInfo[],
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options: FlagsDef,
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) {
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const fields = ['id', 'name', 'value'];
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if (options.all) {
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// Replace undefined app names with 'N/A' or null
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varArray = varArray.map((i: EnvironmentVariableInfo) => {
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i.appName = i.appName || (options.json ? null : 'N/A');
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return i;
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});
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fields.push(options.json ? 'appName' : 'appName => APPLICATION');
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if (options.device) {
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fields.push(options.json ? 'deviceUUID' : 'deviceUUID => DEVICE');
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}
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if (!options.config) {
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fields.push(options.json ? 'serviceName' : 'serviceName => SERVICE');
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}
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}
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if (options.json) {
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this.log(
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stringifyVarArray<SDK.EnvironmentVariableBase>(varArray, fields),
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);
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} else {
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this.log(
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getVisuals().table.horizontal(
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_.sortBy(varArray, (v: SDK.EnvironmentVariableBase) => v.name),
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fields,
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),
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);
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}
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}
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}
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async function validateServiceName(
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sdk: SDK.BalenaSDK,
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serviceName: string,
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appName: string,
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) {
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const services = await sdk.models.service.getAllByApplication(appName, {
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$filter: { service_name: serviceName },
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});
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if (services.length === 0) {
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throw new ExpectedError(
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`Service "${serviceName}" not found for application "${appName}"`,
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);
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}
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}
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/**
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* Fetch application-wide config / env / service vars.
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* If options.application is undefined, an attempt is made to obtain the
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* application name from the device UUID (options.device). If this attempt
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* fails because the device does not belong to any application, an emtpy
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* array is returned.
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*/
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async function getAppVars(
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sdk: SDK.BalenaSDK,
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appName: string | undefined,
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options: FlagsDef,
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): Promise<EnvironmentVariableInfo[]> {
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const appVars: EnvironmentVariableInfo[] = [];
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if (!appName) {
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return appVars;
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}
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if (options.config || options.all || !options.service) {
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const vars = await sdk.models.application[
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options.config ? 'configVar' : 'envVar'
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].getAllByApplication(appName);
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fillInInfoFields(vars, appName);
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appVars.push(...vars);
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}
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if (!options.config && (options.service || options.all)) {
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const pineOpts: SDK.PineOptions<SDK.ServiceEnvironmentVariable> = {
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$expand: {
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service: {},
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},
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};
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if (options.service) {
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pineOpts.$filter = {
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service: {
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service_name: options.service,
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},
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};
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}
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const serviceVars = await sdk.models.service.var.getAllByApplication(
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appName,
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pineOpts,
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);
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fillInInfoFields(serviceVars, appName);
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appVars.push(...serviceVars);
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}
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return appVars;
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}
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/**
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* Fetch config / env / service vars when the '--device' option is provided.
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* Precondition: options.device must be defined.
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*/
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async function getDeviceVars(
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sdk: SDK.BalenaSDK,
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fullUUID: string,
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appName: string | undefined,
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options: FlagsDef,
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): Promise<EnvironmentVariableInfo[]> {
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const printedUUID = options.json ? fullUUID : options.device!;
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const deviceVars: EnvironmentVariableInfo[] = [];
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if (options.config) {
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const deviceConfigVars = await sdk.models.device.configVar.getAllByDevice(
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fullUUID,
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);
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fillInInfoFields(deviceConfigVars, appName, printedUUID);
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deviceVars.push(...deviceConfigVars);
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} else {
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if (options.service || options.all) {
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const pineOpts: SDK.PineOptions<SDK.DeviceServiceEnvironmentVariable> = {
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$expand: {
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service_install: {
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$expand: 'installs__service',
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},
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},
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};
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if (options.service) {
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pineOpts.$filter = {
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service_install: {
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installs__service: { service_name: options.service },
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},
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};
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}
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const deviceServiceVars = await sdk.models.device.serviceVar.getAllByDevice(
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fullUUID,
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pineOpts,
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);
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fillInInfoFields(deviceServiceVars, appName, printedUUID);
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deviceVars.push(...deviceServiceVars);
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}
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if (!options.service || options.all) {
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const deviceEnvVars = await sdk.models.device.envVar.getAllByDevice(
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fullUUID,
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);
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fillInInfoFields(deviceEnvVars, appName, printedUUID);
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deviceVars.push(...deviceEnvVars);
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}
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}
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return deviceVars;
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}
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/**
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* For each env var object in varArray, fill in its top-level serviceName
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* and deviceUUID fields. An asterisk is used to indicate that the variable
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* applies to "all services" or "all devices".
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*/
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function fillInInfoFields(
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varArray:
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| EnvironmentVariableInfo[]
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| DeviceServiceEnvironmentVariableInfo[]
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| ServiceEnvironmentVariableInfo[],
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appName?: string,
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deviceUUID?: string,
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) {
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for (const envVar of varArray) {
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if ('service' in envVar) {
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// envVar is of type ServiceEnvironmentVariableInfo
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envVar.serviceName = (envVar.service as SDK.Service[])[0]?.service_name;
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} else if ('service_install' in envVar) {
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// envVar is of type DeviceServiceEnvironmentVariableInfo
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envVar.serviceName = ((envVar.service_install as SDK.ServiceInstall[])[0]
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?.installs__service as SDK.Service[])[0]?.service_name;
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}
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envVar.appName = appName;
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envVar.serviceName = envVar.serviceName || '*';
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envVar.deviceUUID = deviceUUID || '*';
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}
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}
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/**
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* Transform each object (item) of varArray to preserve only the
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* fields (keys) listed in the fields argument.
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*/
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function stringifyVarArray<T = Dictionary<any>>(
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varArray: T[],
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fields: string[],
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): string {
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const transformed = varArray.map((o: Dictionary<any>) =>
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_.transform(
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o,
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(result, value, key) => {
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if (fields.includes(key)) {
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result[key] = value;
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}
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},
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{} as Dictionary<any>,
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),
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);
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return JSON.stringify(transformed, null, 4);
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}
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