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diff --git a/node_modules/commander/Readme.md b/node_modules/commander/Readme.md index aa4f42b5..c846e7a2 100644 --- a/node_modules/commander/Readme.md +++ b/node_modules/commander/Readme.md @@ -1,345 +1,187 @@ # Commander.js + [](http://travis-ci.org/tj/commander.js) [](https://www.npmjs.org/package/commander) [](https://npmcharts.com/compare/commander?minimal=true) [](https://packagephobia.now.sh/result?p=commander) +[](https://gitter.im/tj/commander.js?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) + + The complete solution for [node.js](http://nodejs.org) command-line interfaces, inspired by Ruby's [commander](https://github.com/commander-rb/commander). + [API documentation](http://tj.github.com/commander.js/) -The complete solution for [node.js](http://nodejs.org) command-line interfaces, inspired by Ruby's [commander](https://github.com/commander-rb/commander). - -Read this in other languages: English | [简体中文](./Readme_zh-CN.md) - -- [Commander.js](#commanderjs) - - [Installation](#installation) - - [Declaring program variable](#declaring-program-variable) - - [Options](#options) - - [Common option types, boolean and value](#common-option-types-boolean-and-value) - - [Default option value](#default-option-value) - - [Other option types, negatable boolean and flag|value](#other-option-types-negatable-boolean-and-flagvalue) - - [Custom option processing](#custom-option-processing) - - [Required option](#required-option) - - [Version option](#version-option) - - [Commands](#commands) - - [Specify the argument syntax](#specify-the-argument-syntax) - - [Action handler (sub)commands](#action-handler-subcommands) - - [Git-style executable (sub)commands](#git-style-executable-subcommands) - - [Automated --help](#automated---help) - - [Custom help](#custom-help) - - [.usage and .name](#usage-and-name) - - [.outputHelp(cb)](#outputhelpcb) - - [.helpOption(flags, description)](#helpoptionflags-description) - - [.help(cb)](#helpcb) - - [Custom event listeners](#custom-event-listeners) - - [Bits and pieces](#bits-and-pieces) - - [Avoiding option name clashes](#avoiding-option-name-clashes) - - [TypeScript](#typescript) - - [Node options such as --harmony](#node-options-such-as---harmony) - - [Node debugging](#node-debugging) - - [Override exit handling](#override-exit-handling) - - [Examples](#examples) - - [License](#license) - - [Support](#support) - - [Commander for enterprise](#commander-for-enterprise) ## Installation -```bash -npm install commander -``` + $ npm install commander -## Declaring _program_ variable +## Option parsing -Commander exports a global object which is convenient for quick programs. -This is used in the examples in this README for brevity. +Options with commander are defined with the `.option()` method, also serving as documentation for the options. The example below parses args and options from `process.argv`, leaving remaining args as the `program.args` array which were not consumed by options. ```js -const program = require('commander'); -program.version('0.0.1'); -``` - -For larger programs which may use commander in multiple ways, including unit testing, it is better to create a local Command object to use. - - ```js - const commander = require('commander'); - const program = new commander.Command(); - program.version('0.0.1'); - ``` - -## Options - -Options are defined with the `.option()` method, also serving as documentation for the options. Each option can have a short flag (single character) and a long name, separated by a comma or space. - -The options can be accessed as properties on the Command object. Multi-word options such as "--template-engine" are camel-cased, becoming `program.templateEngine` etc. Multiple short flags may be combined as a single arg, for example `-abc` is equivalent to `-a -b -c`. - -See also optional new behaviour to [avoid name clashes](#avoiding-option-name-clashes). - -### Common option types, boolean and value +#!/usr/bin/env node -The two most used option types are a boolean flag, and an option which takes a value (declared using angle brackets). Both are `undefined` unless specified on command line. +/** + * Module dependencies. + */ -```js -const program = require('commander'); +var program = require('commander'); program - .option('-d, --debug', 'output extra debugging') - .option('-s, --small', 'small pizza size') - .option('-p, --pizza-type <type>', 'flavour of pizza'); - -program.parse(process.argv); - -if (program.debug) console.log(program.opts()); -console.log('pizza details:'); -if (program.small) console.log('- small pizza size'); -if (program.pizzaType) console.log(`- ${program.pizzaType}`); -``` + .version('0.1.0') + .option('-p, --peppers', 'Add peppers') + .option('-P, --pineapple', 'Add pineapple') + .option('-b, --bbq-sauce', 'Add bbq sauce') + .option('-c, --cheese [type]', 'Add the specified type of cheese [marble]', 'marble') + .parse(process.argv); -```bash -$ pizza-options -d -{ debug: true, small: undefined, pizzaType: undefined } -pizza details: -$ pizza-options -p -error: option '-p, --pizza-type <type>' argument missing -$ pizza-options -ds -p vegetarian -{ debug: true, small: true, pizzaType: 'vegetarian' } -pizza details: -- small pizza size -- vegetarian -$ pizza-options --pizza-type=cheese -pizza details: -- cheese +console.log('you ordered a pizza with:'); +if (program.peppers) console.log(' - peppers'); +if (program.pineapple) console.log(' - pineapple'); +if (program.bbqSauce) console.log(' - bbq'); +console.log(' - %s cheese', program.cheese); ``` -`program.parse(arguments)` processes the arguments, leaving any args not consumed by the options as the `program.args` array. - -### Default option value +Short flags may be passed as a single arg, for example `-abc` is equivalent to `-a -b -c`. Multi-word options such as "--template-engine" are camel-cased, becoming `program.templateEngine` etc. -You can specify a default value for an option which takes a value. +Note that multi-word options starting with `--no` prefix negate the boolean value of the following word. For example, `--no-sauce` sets the value of `program.sauce` to false. ```js -const program = require('commander'); - -program - .option('-c, --cheese <type>', 'add the specified type of cheese', 'blue'); - -program.parse(process.argv); - -console.log(`cheese: ${program.cheese}`); -``` - -```bash -$ pizza-options -cheese: blue -$ pizza-options --cheese stilton -cheese: stilton -``` - -### Other option types, negatable boolean and flag|value - -You can specify a boolean option long name with a leading `no-` to set the option value to false when used. -Defined alone this also makes the option true by default. +#!/usr/bin/env node -If you define `--foo` first, adding `--no-foo` does not change the default value from what it would -otherwise be. You can specify a default boolean value for a boolean flag and it can be overridden on command line. +/** + * Module dependencies. + */ -```js -const program = require('commander'); +var program = require('commander'); program .option('--no-sauce', 'Remove sauce') - .option('--cheese <flavour>', 'cheese flavour', 'mozzarella') - .option('--no-cheese', 'plain with no cheese') .parse(process.argv); -const sauceStr = program.sauce ? 'sauce' : 'no sauce'; -const cheeseStr = (program.cheese === false) ? 'no cheese' : `${program.cheese} cheese`; -console.log(`You ordered a pizza with ${sauceStr} and ${cheeseStr}`); +console.log('you ordered a pizza'); +if (program.sauce) console.log(' with sauce'); +else console.log(' without sauce'); ``` -```bash -$ pizza-options -You ordered a pizza with sauce and mozzarella cheese -$ pizza-options --sauce -error: unknown option '--sauce' -$ pizza-options --cheese=blue -You ordered a pizza with sauce and blue cheese -$ pizza-options --no-sauce --no-cheese -You ordered a pizza with no sauce and no cheese -``` +To get string arguments from options you will need to use angle brackets <> for required inputs or square brackets [] for optional inputs. -You can specify an option which functions as a flag but may also take a value (declared using square brackets). +e.g. ```.option('-m --myarg [myVar]', 'my super cool description')``` -```js -const program = require('commander'); +Then to access the input if it was passed in. -program - .option('-c, --cheese [type]', 'Add cheese with optional type'); +e.g. ```var myInput = program.myarg``` -program.parse(process.argv); +**NOTE**: If you pass a argument without using brackets the example above will return true and not the value passed in. -if (program.cheese === undefined) console.log('no cheese'); -else if (program.cheese === true) console.log('add cheese'); -else console.log(`add cheese type ${program.cheese}`); -``` - -```bash -$ pizza-options -no cheese -$ pizza-options --cheese -add cheese -$ pizza-options --cheese mozzarella -add cheese type mozzarella -``` -### Custom option processing +## Version option -You may specify a function to do custom processing of option values. The callback function receives two parameters, the user specified value and the -previous value for the option. It returns the new value for the option. +Calling the `version` implicitly adds the `-V` and `--version` options to the command. +When either of these options is present, the command prints the version number and exits. -This allows you to coerce the option value to the desired type, or accumulate values, or do entirely custom processing. + $ ./examples/pizza -V + 0.0.1 -You can optionally specify the default/starting value for the option after the function. +If you want your program to respond to the `-v` option instead of the `-V` option, simply pass custom flags to the `version` method using the same syntax as the `option` method. ```js -const program = require('commander'); - -function myParseInt(value, dummyPrevious) { - // parseInt takes a string and an optional radix - return parseInt(value); -} - -function increaseVerbosity(dummyValue, previous) { - return previous + 1; -} - -function collect(value, previous) { - return previous.concat([value]); -} - -function commaSeparatedList(value, dummyPrevious) { - return value.split(','); -} - program - .option('-f, --float <number>', 'float argument', parseFloat) - .option('-i, --integer <number>', 'integer argument', myParseInt) - .option('-v, --verbose', 'verbosity that can be increased', increaseVerbosity, 0) - .option('-c, --collect <value>', 'repeatable value', collect, []) - .option('-l, --list <items>', 'comma separated list', commaSeparatedList) -; - -program.parse(process.argv); - -if (program.float !== undefined) console.log(`float: ${program.float}`); -if (program.integer !== undefined) console.log(`integer: ${program.integer}`); -if (program.verbose > 0) console.log(`verbosity: ${program.verbose}`); -if (program.collect.length > 0) console.log(program.collect); -if (program.list !== undefined) console.log(program.list); + .version('0.0.1', '-v, --version') ``` -```bash -$ custom -f 1e2 -float: 100 -$ custom --integer 2 -integer: 2 -$ custom -v -v -v -verbose: 3 -$ custom -c a -c b -c c -[ 'a', 'b', 'c' ] -$ custom --list x,y,z -[ 'x', 'y', 'z' ] -``` +The version flags can be named anything, but the long option is required. -### Required option +## Command-specific options -You may specify a required (mandatory) option using `.requiredOption`. The option must be specified on the command line, or by having a default value. The method is otherwise the same as `.option` in format, taking flags and description, and optional default value or custom processing. +You can attach options to a command. ```js -const program = require('commander'); - -program - .requiredOption('-c, --cheese <type>', 'pizza must have cheese'); - -program.parse(process.argv); -``` - -``` -$ pizza -error: required option '-c, --cheese <type>' not specified -``` +#!/usr/bin/env node -### Version option +var program = require('commander'); -The optional `version` method adds handling for displaying the command version. The default option flags are `-V` and `--version`, and when present the command prints the version number and exits. +program + .command('rm <dir>') + .option('-r, --recursive', 'Remove recursively') + .action(function (dir, cmd) { + console.log('remove ' + dir + (cmd.recursive ? ' recursively' : '')) + }) -```js -program.version('0.0.1'); +program.parse(process.argv) ``` -```bash -$ ./examples/pizza -V -0.0.1 -``` +A command's options are validated when the command is used. Any unknown options will be reported as an error. However, if an action-based command does not define an action, then the options are not validated. -You may change the flags and description by passing additional parameters to the `version` method, using -the same syntax for flags as the `option` method. The version flags can be named anything, but a long name is required. +## Coercion ```js -program.version('0.0.1', '-v, --vers', 'output the current version'); -``` +function range(val) { + return val.split('..').map(Number); +} -## Commands +function list(val) { + return val.split(','); +} -You can specify (sub)commands for your top-level command using `.command`. There are two ways these can be implemented: using an action handler attached to the command, or as a separate executable file (described in more detail later). In the first parameter to `.command` you specify the command name and any command arguments. The arguments may be `<required>` or `[optional]`, and the last argument may also be `variadic...`. +function collect(val, memo) { + memo.push(val); + return memo; +} -For example: +function increaseVerbosity(v, total) { + return total + 1; +} -```js -// Command implemented using action handler (description is supplied separately to `.command`) -// Returns new command for configuring. program - .command('clone <source> [destination]') - .description('clone a repository into a newly created directory') - .action((source, destination) => { - console.log('clone command called'); - }); + .version('0.1.0') + .usage('[options] <file ...>') + .option('-i, --integer <n>', 'An integer argument', parseInt) + .option('-f, --float <n>', 'A float argument', parseFloat) + .option('-r, --range <a>..<b>', 'A range', range) + .option('-l, --list <items>', 'A list', list) + .option('-o, --optional [value]', 'An optional value') + .option('-c, --collect [value]', 'A repeatable value', collect, []) + .option('-v, --verbose', 'A value that can be increased', increaseVerbosity, 0) + .parse(process.argv); -// Command implemented using separate executable file (description is second parameter to `.command`) -// Returns top-level command for adding more commands. -program - .command('start <service>', 'start named service') - .command('stop [service]', 'stop named service, or all if no name supplied'); +console.log(' int: %j', program.integer); +console.log(' float: %j', program.float); +console.log(' optional: %j', program.optional); +program.range = program.range || []; +console.log(' range: %j..%j', program.range[0], program.range[1]); +console.log(' list: %j', program.list); +console.log(' collect: %j', program.collect); +console.log(' verbosity: %j', program.verbose); +console.log(' args: %j', program.args); ``` -### Specify the argument syntax - -You use `.arguments` to specify the arguments for the top-level command, and for subcommands they are included in the `.command` call. Angled brackets (e.g. `<required>`) indicate required input. Square brackets (e.g. `[optional]`) indicate optional input. - +## Regular Expression ```js -const program = require('commander'); - program .version('0.1.0') - .arguments('<cmd> [env]') - .action(function (cmd, env) { - cmdValue = cmd; - envValue = env; - }); - -program.parse(process.argv); + .option('-s --size <size>', 'Pizza size', /^(large|medium|small)$/i, 'medium') + .option('-d --drink [drink]', 'Drink', /^(coke|pepsi|izze)$/i) + .parse(process.argv); -if (typeof cmdValue === 'undefined') { - console.error('no command given!'); - process.exit(1); -} -console.log('command:', cmdValue); -console.log('environment:', envValue || "no environment given"); +console.log(' size: %j', program.size); +console.log(' drink: %j', program.drink); ``` - The last argument of a command can be variadic, and only the last argument. To make an argument variadic you - append `...` to the argument name. For example: +## Variadic arguments + + The last argument of a command can be variadic, and only the last argument. To make an argument variadic you have to + append `...` to the argument name. Here is an example: ```js -const program = require('commander'); +#!/usr/bin/env node + +/** + * Module dependencies. + */ + +var program = require('commander'); program .version('0.1.0') @@ -356,91 +198,83 @@ program program.parse(process.argv); ``` -The variadic argument is passed to the action handler as an array. (And this also applies to `program.args`.) - -### Action handler (sub)commands + An `Array` is used for the value of a variadic argument. This applies to `program.args` as well as the argument passed + to your action as demonstrated above. -You can add options to a command that uses an action handler. -The action handler gets passed a parameter for each argument you declared, and one additional argument which is the -command object itself. This command argument has the values for the command-specific options added as properties. +## Specify the argument syntax ```js -const program = require('commander'); - -program - .command('rm <dir>') - .option('-r, --recursive', 'Remove recursively') - .action(function (dir, cmdObj) { - console.log('remove ' + dir + (cmdObj.recursive ? ' recursively' : '')) - }) +#!/usr/bin/env node -program.parse(process.argv) -``` +var program = require('commander'); -You may supply an `async` action handler, in which case you call `.parseAsync` rather than `.parse`. +program + .version('0.1.0') + .arguments('<cmd> [env]') + .action(function (cmd, env) { + cmdValue = cmd; + envValue = env; + }); -```js -async function run() { /* code goes here */ } +program.parse(process.argv); -async function main() { - program - .command('run') - .action(run); - await program.parseAsync(process.argv); +if (typeof cmdValue === 'undefined') { + console.error('no command given!'); + process.exit(1); } +console.log('command:', cmdValue); +console.log('environment:', envValue || "no environment given"); ``` +Angled brackets (e.g. `<cmd>`) indicate required input. Square brackets (e.g. `[env]`) indicate optional input. -A command's options on the command line are validated when the command is used. Any unknown options will be reported as an error. However, if an action-based command does not define an action, then the options are not validated. - -Configuration options can be passed with the call to `.command()`. Specifying `true` for `opts.noHelp` will remove the command from the generated help output. - -### Git-style executable (sub)commands - -When `.command()` is invoked with a description argument, this tells commander that you're going to use separate executables for sub-commands, much like `git(1)` and other popular tools. -Commander will search the executables in the directory of the entry script (like `./examples/pm`) with the name `program-subcommand`, like `pm-install`, `pm-search`. -You can specify a custom name with the `executableFile` configuration option. - -You handle the options for an executable (sub)command in the executable, and don't declare them at the top-level. +## Git-style sub-commands ```js // file: ./examples/pm -const program = require('commander'); +var program = require('commander'); program .version('0.1.0') .command('install [name]', 'install one or more packages') .command('search [query]', 'search with optional query') - .command('update', 'update installed packages', {executableFile: 'myUpdateSubCommand'}) .command('list', 'list packages installed', {isDefault: true}) .parse(process.argv); ``` -Configuration options can be passed with the call to `.command()`. Specifying `true` for `opts.noHelp` will remove the command from the generated help output. Specifying `true` for `opts.isDefault` will run the subcommand if no other subcommand is specified. -Specifying a name with `executableFile` will override the default constructed name. +When `.command()` is invoked with a description argument, no `.action(callback)` should be called to handle sub-commands, otherwise there will be an error. This tells commander that you're going to use separate executables for sub-commands, much like `git(1)` and other popular tools. +The commander will try to search the executables in the directory of the entry script (like `./examples/pm`) with the name `program-command`, like `pm-install`, `pm-search`. + +Options can be passed with the call to `.command()`. Specifying `true` for `opts.noHelp` will remove the subcommand from the generated help output. Specifying `true` for `opts.isDefault` will run the subcommand if no other subcommand is specified. If the program is designed to be installed globally, make sure the executables have proper modes, like `755`. +### `--harmony` + +You can enable `--harmony` option in two ways: +* Use `#! /usr/bin/env node --harmony` in the sub-commands scripts. Note some os version don’t support this pattern. +* Use the `--harmony` option when call the command, like `node --harmony examples/pm publish`. The `--harmony` option will be preserved when spawning sub-command process. + ## Automated --help The help information is auto-generated based on the information commander already knows about your program, so the following `--help` info is for free: -```bash +``` $ ./examples/pizza --help Usage: pizza [options] An application for pizzas ordering Options: + -h, --help output usage information -V, --version output the version number -p, --peppers Add peppers -P, --pineapple Add pineapple -b, --bbq Add bbq sauce - -c, --cheese <type> Add the specified type of cheese (default: "marble") + -c, --cheese <type> Add the specified type of cheese [marble] -C, --no-cheese You do not want any cheese - -h, --help output usage information ``` -### Custom help +## Custom help You can display arbitrary `-h, --help` information by listening for "--help". Commander will automatically @@ -452,7 +286,11 @@ Options: ```js #!/usr/bin/env node -const program = require('commander'); +/** + * Module dependencies. + */ + +var program = require('commander'); program .version('0.1.0') @@ -477,7 +315,7 @@ console.log('stuff'); Yields the following help output when `node script-name.js -h` or `node script-name.js --help` are run: -```Text +``` Usage: custom-help [options] Options: @@ -492,24 +330,7 @@ Examples: $ custom-help -h ``` -### .usage and .name - -These allow you to customise the usage description in the first line of the help. The name is otherwise -deduced from the (full) program arguments. Given: - -```js -program - .name("my-command") - .usage("[global options] command") -``` - -The help will start with: - -```Text -Usage: my-command [global options] command -``` - -### .outputHelp(cb) +## .outputHelp(cb) Output help information without exiting. Optional callback cb allows post-processing of help text before it is displayed. @@ -517,8 +338,8 @@ Optional callback cb allows post-processing of help text before it is displayed. If you want to display help by default (e.g. if no command was provided), you can use something like: ```js -const program = require('commander'); -const colors = require('colors'); +var program = require('commander'); +var colors = require('colors'); program .version('0.1.0') @@ -534,22 +355,13 @@ function make_red(txt) { } ``` -### .helpOption(flags, description) - - Override the default help flags and description. - -```js -program - .helpOption('-e, --HELP', 'read more information'); -``` - -### .help(cb) +## .help(cb) Output help information and exit immediately. Optional callback cb allows post-processing of help text before it is displayed. -## Custom event listeners +## Custom event listeners You can execute custom actions by listening to command and option events. ```js @@ -564,94 +376,10 @@ program.on('command:*', function () { }); ``` -## Bits and pieces - -### Avoiding option name clashes - -The original and default behaviour is that the option values are stored -as properties on the program, and the action handler is passed a -command object with the options values stored as properties. -This is very convenient to code, but the downside is possible clashes with -existing properties of Command. - -There are two new routines to change the behaviour, and the default behaviour may change in the future: - -- `storeOptionsAsProperties`: whether to store option values as properties on command object, or store separately (specify false) and access using `.opts()` -- `passCommandToAction`: whether to pass command to action handler, -or just the options (specify false) - -```js -// file: ./examples/storeOptionsAsProperties.action.js -program - .storeOptionsAsProperties(false) - .passCommandToAction(false); - -program - .name('my-program-name') - .option('-n,--name <name>'); - -program - .command('show') - .option('-a,--action <action>') - .action((options) => { - console.log(options.action); - }); - -program.parse(process.argv); - -const programOptions = program.opts(); -console.log(programOptions.name); -``` - -### TypeScript - -The Commander package includes its TypeScript Definition file, but also requires the node types which you need to install yourself. e.g. - -```bash -npm install commander -npm install --save-dev @types/node -``` - -If you use `ts-node` and git-style sub-commands written as `.ts` files, you need to call your program through node to get the sub-commands called correctly. e.g. - -```bash -node -r ts-node/register pm.ts -``` - -### Node options such as `--harmony` - -You can enable `--harmony` option in two ways: - -- Use `#! /usr/bin/env node --harmony` in the sub-commands scripts. (Note Windows does not support this pattern.) -- Use the `--harmony` option when call the command, like `node --harmony examples/pm publish`. The `--harmony` option will be preserved when spawning sub-command process. - -### Node debugging - -If you are using the node inspector for [debugging](https://nodejs.org/en/docs/guides/debugging-getting-started/) git-style executable (sub)commands using `node --inspect` et al, -the inspector port is incremented by 1 for the spawned subcommand. - -### Override exit handling - -By default Commander calls `process.exit` when it detects errors, or after displaying the help or version. You can override -this behaviour and optionally supply a callback. The default override throws a `CommanderError`. - -The override callback is passed a `CommanderError` with properties `exitCode` number, `code` string, and `message`. The default override behaviour is to throw the error, except for async handling of executable subcommand completion which carries on. The normal display of error messages or version or help -is not affected by the override which is called after the display. - -``` js -program.exitOverride(); - -try { - program.parse(process.argv); -} catch (err) { - // custom processing... -} -``` - ## Examples ```js -const program = require('commander'); +var program = require('commander'); program .version('0.1.0') @@ -664,7 +392,7 @@ program .description('run setup commands for all envs') .option("-s, --setup_mode [mode]", "Which setup mode to use") .action(function(env, options){ - const mode = options.setup_mode || "normal"; + var mode = options.setup_mode || "normal"; env = env || 'all'; console.log('setup for %s env(s) with %s mode', env, mode); }); @@ -698,16 +426,3 @@ More Demos can be found in the [examples](https://github.com/tj/commander.js/tre ## License [MIT](https://github.com/tj/commander.js/blob/master/LICENSE) - -## Support - -Commander 4.x is supported on Node 8 and above, and is likely to work with Node 6 but not tested. -(For versions of Node below Node 6, use Commander 3.x or 2.x.) - -The main forum for free and community support is the project [Issues](https://github.com/tj/commander.js/issues) on GitHub. - -### Commander for enterprise - -Available as part of the Tidelift Subscription - -The maintainers of Commander and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source dependencies you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use. [Learn more.](https://tidelift.com/subscription/pkg/npm-commander?utm_source=npm-commander&utm_medium=referral&utm_campaign=enterprise&utm_term=repo) |