You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
494 lines
13 KiB
494 lines
13 KiB
/* eslint-disable class-methods-use-this */
|
|
'use strict';
|
|
|
|
const
|
|
UTIL = require('util'),
|
|
PATH = require('path'),
|
|
EOL = require('os').EOL,
|
|
|
|
Q = require('q'),
|
|
chalk = require('chalk'),
|
|
|
|
CoaObject = require('./coaobject'),
|
|
Opt = require('./opt'),
|
|
Arg = require('./arg'),
|
|
completion = require('./completion');
|
|
|
|
/**
|
|
* Command
|
|
*
|
|
* Top level entity. Commands may have options and arguments.
|
|
*
|
|
* @namespace
|
|
* @class Cmd
|
|
* @extends CoaObject
|
|
*/
|
|
class Cmd extends CoaObject {
|
|
/**
|
|
* @constructs
|
|
* @param {COA.Cmd} [cmd] parent command
|
|
*/
|
|
constructor(cmd) {
|
|
super(cmd);
|
|
|
|
this._parent(cmd);
|
|
this._cmds = [];
|
|
this._cmdsByName = {};
|
|
this._opts = [];
|
|
this._optsByKey = {};
|
|
this._args = [];
|
|
this._api = null;
|
|
this._ext = false;
|
|
}
|
|
|
|
static create(cmd) {
|
|
return new Cmd(cmd);
|
|
}
|
|
|
|
/**
|
|
* Returns object containing all its subcommands as methods
|
|
* to use from other programs.
|
|
*
|
|
* @returns {Object}
|
|
*/
|
|
get api() {
|
|
// Need _this here because of passed arguments into _api
|
|
const _this = this;
|
|
this._api || (this._api = function () {
|
|
return _this.invoke.apply(_this, arguments);
|
|
});
|
|
|
|
const cmds = this._cmdsByName;
|
|
Object.keys(cmds).forEach(cmd => { this._api[cmd] = cmds[cmd].api; });
|
|
|
|
return this._api;
|
|
}
|
|
|
|
_parent(cmd) {
|
|
this._cmd = cmd || this;
|
|
|
|
this.isRootCmd ||
|
|
cmd._cmds.push(this) &&
|
|
this._name &&
|
|
(this._cmd._cmdsByName[this._name] = this);
|
|
|
|
return this;
|
|
}
|
|
|
|
get isRootCmd() {
|
|
return this._cmd === this;
|
|
}
|
|
|
|
/**
|
|
* Set a canonical command identifier to be used anywhere in the API.
|
|
*
|
|
* @param {String} name - command name
|
|
* @returns {COA.Cmd} - this instance (for chainability)
|
|
*/
|
|
name(name) {
|
|
super.name(name);
|
|
|
|
this.isRootCmd ||
|
|
(this._cmd._cmdsByName[name] = this);
|
|
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Create new or add existing subcommand for current command.
|
|
*
|
|
* @param {COA.Cmd} [cmd] existing command instance
|
|
* @returns {COA.Cmd} new subcommand instance
|
|
*/
|
|
cmd(cmd) {
|
|
return cmd?
|
|
cmd._parent(this)
|
|
: new Cmd(this);
|
|
}
|
|
|
|
/**
|
|
* Create option for current command.
|
|
*
|
|
* @returns {COA.Opt} new option instance
|
|
*/
|
|
opt() {
|
|
return new Opt(this);
|
|
}
|
|
|
|
/**
|
|
* Create argument for current command.
|
|
*
|
|
* @returns {COA.Opt} new argument instance
|
|
*/
|
|
arg() {
|
|
return new Arg(this);
|
|
}
|
|
|
|
/**
|
|
* Add (or set) action for current command.
|
|
*
|
|
* @param {Function} act - action function,
|
|
* invoked in the context of command instance
|
|
* and has the parameters:
|
|
* - {Object} opts - parsed options
|
|
* - {String[]} args - parsed arguments
|
|
* - {Object} res - actions result accumulator
|
|
* It can return rejected promise by Cmd.reject (in case of error)
|
|
* or any other value treated as result.
|
|
* @param {Boolean} [force=false] flag for set action instead add to existings
|
|
* @returns {COA.Cmd} - this instance (for chainability)
|
|
*/
|
|
act(act, force) {
|
|
if(!act) return this;
|
|
|
|
(!this._act || force) && (this._act = []);
|
|
this._act.push(act);
|
|
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Make command "helpful", i.e. add -h --help flags for print usage.
|
|
*
|
|
* @returns {COA.Cmd} - this instance (for chainability)
|
|
*/
|
|
helpful() {
|
|
return this.opt()
|
|
.name('help')
|
|
.title('Help')
|
|
.short('h')
|
|
.long('help')
|
|
.flag()
|
|
.only()
|
|
.act(function() {
|
|
return this.usage();
|
|
})
|
|
.end();
|
|
}
|
|
|
|
/**
|
|
* Adds shell completion to command, adds "completion" subcommand,
|
|
* that makes all the magic.
|
|
* Must be called only on root command.
|
|
*
|
|
* @returns {COA.Cmd} - this instance (for chainability)
|
|
*/
|
|
completable() {
|
|
return this.cmd()
|
|
.name('completion')
|
|
.apply(completion)
|
|
.end();
|
|
}
|
|
|
|
/**
|
|
* Allow command to be extendable by external node.js modules.
|
|
*
|
|
* @param {String} [pattern] Pattern of node.js module to find subcommands at.
|
|
* @returns {COA.Cmd} - this instance (for chainability)
|
|
*/
|
|
extendable(pattern) {
|
|
this._ext = pattern || true;
|
|
return this;
|
|
}
|
|
|
|
_exit(msg, code) {
|
|
return process.once('exit', function(exitCode) {
|
|
msg && console[code === 0 ? 'log' : 'error'](msg);
|
|
process.exit(code || exitCode || 0);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Build full usage text for current command instance.
|
|
*
|
|
* @returns {String} usage text
|
|
*/
|
|
usage() {
|
|
const res = [];
|
|
|
|
this._title && res.push(this._fullTitle());
|
|
|
|
res.push('', 'Usage:');
|
|
|
|
this._cmds.length
|
|
&& res.push([
|
|
'', '', chalk.redBright(this._fullName()), chalk.blueBright('COMMAND'),
|
|
chalk.greenBright('[OPTIONS]'), chalk.magentaBright('[ARGS]')
|
|
].join(' '));
|
|
|
|
(this._opts.length + this._args.length)
|
|
&& res.push([
|
|
'', '', chalk.redBright(this._fullName()),
|
|
chalk.greenBright('[OPTIONS]'), chalk.magentaBright('[ARGS]')
|
|
].join(' '));
|
|
|
|
res.push(
|
|
this._usages(this._cmds, 'Commands'),
|
|
this._usages(this._opts, 'Options'),
|
|
this._usages(this._args, 'Arguments')
|
|
);
|
|
|
|
return res.join(EOL);
|
|
}
|
|
|
|
_usage() {
|
|
return chalk.blueBright(this._name) + ' : ' + this._title;
|
|
}
|
|
|
|
_usages(os, title) {
|
|
if(!os.length) return;
|
|
|
|
return ['', title + ':']
|
|
.concat(os.map(o => ` ${o._usage()}`))
|
|
.join(EOL);
|
|
}
|
|
|
|
_fullTitle() {
|
|
return `${this.isRootCmd? '' : this._cmd._fullTitle() + EOL}${this._title}`;
|
|
}
|
|
|
|
_fullName() {
|
|
return `${this.isRootCmd? '' : this._cmd._fullName() + ' '}${PATH.basename(this._name)}`;
|
|
}
|
|
|
|
_ejectOpt(opts, opt) {
|
|
const pos = opts.indexOf(opt);
|
|
if(pos === -1) return;
|
|
|
|
return opts[pos]._arr?
|
|
opts[pos] :
|
|
opts.splice(pos, 1)[0];
|
|
}
|
|
|
|
_checkRequired(opts, args) {
|
|
if(this._opts.some(opt => opt._only && opts.hasOwnProperty(opt._name))) return;
|
|
|
|
const all = this._opts.concat(this._args);
|
|
let i;
|
|
while(i = all.shift())
|
|
if(i._req && i._checkParsed(opts, args))
|
|
return this.reject(i._requiredText());
|
|
}
|
|
|
|
_parseCmd(argv, unparsed) {
|
|
unparsed || (unparsed = []);
|
|
|
|
let i,
|
|
optSeen = false;
|
|
while(i = argv.shift()) {
|
|
i.indexOf('-') || (optSeen = true);
|
|
|
|
if(optSeen || !/^\w[\w-_]*$/.test(i)) {
|
|
unparsed.push(i);
|
|
continue;
|
|
}
|
|
|
|
let pkg, cmd = this._cmdsByName[i];
|
|
if(!cmd && this._ext) {
|
|
if(this._ext === true) {
|
|
pkg = i;
|
|
let c = this;
|
|
while(true) { // eslint-disable-line
|
|
pkg = c._name + '-' + pkg;
|
|
if(c.isRootCmd) break;
|
|
c = c._cmd;
|
|
}
|
|
} else if(typeof this._ext === 'string')
|
|
pkg = ~this._ext.indexOf('%s')?
|
|
UTIL.format(this._ext, i) :
|
|
this._ext + i;
|
|
|
|
let cmdDesc;
|
|
try {
|
|
cmdDesc = require(pkg);
|
|
} catch(e) {
|
|
// Dummy
|
|
}
|
|
|
|
if(cmdDesc) {
|
|
if(typeof cmdDesc === 'function') {
|
|
this.cmd().name(i).apply(cmdDesc).end();
|
|
} else if(typeof cmdDesc === 'object') {
|
|
this.cmd(cmdDesc);
|
|
cmdDesc.name(i);
|
|
} else throw new Error('Error: Unsupported command declaration type, '
|
|
+ 'should be a function or COA.Cmd() object');
|
|
|
|
cmd = this._cmdsByName[i];
|
|
}
|
|
}
|
|
|
|
if(cmd) return cmd._parseCmd(argv, unparsed);
|
|
|
|
unparsed.push(i);
|
|
}
|
|
|
|
return { cmd : this, argv : unparsed };
|
|
}
|
|
|
|
_parseOptsAndArgs(argv) {
|
|
const opts = {},
|
|
args = {},
|
|
nonParsedOpts = this._opts.concat(),
|
|
nonParsedArgs = this._args.concat();
|
|
|
|
let res, i;
|
|
while(i = argv.shift()) {
|
|
if(i !== '--' && i[0] === '-') {
|
|
const m = i.match(/^(--\w[\w-_]*)=(.*)$/);
|
|
if(m) {
|
|
i = m[1];
|
|
this._optsByKey[i]._flag || argv.unshift(m[2]);
|
|
}
|
|
|
|
const opt = this._ejectOpt(nonParsedOpts, this._optsByKey[i]);
|
|
if(!opt) return this.reject(`Unknown option: ${i}`);
|
|
|
|
if(Q.isRejected(res = opt._parse(argv, opts))) return res;
|
|
|
|
continue;
|
|
}
|
|
|
|
i === '--' && (i = argv.splice(0));
|
|
Array.isArray(i) || (i = [i]);
|
|
|
|
let a;
|
|
while(a = i.shift()) {
|
|
let arg = nonParsedArgs.shift();
|
|
if(!arg) return this.reject(`Unknown argument: ${a}`);
|
|
|
|
arg._arr && nonParsedArgs.unshift(arg);
|
|
if(Q.isRejected(res = arg._parse(a, args))) return res;
|
|
}
|
|
}
|
|
|
|
return {
|
|
opts : this._setDefaults(opts, nonParsedOpts),
|
|
args : this._setDefaults(args, nonParsedArgs)
|
|
};
|
|
}
|
|
|
|
_setDefaults(params, desc) {
|
|
for(const item of desc)
|
|
item._def !== undefined &&
|
|
!params.hasOwnProperty(item._name) &&
|
|
item._saveVal(params, item._def);
|
|
|
|
return params;
|
|
}
|
|
|
|
_processParams(params, desc) {
|
|
const notExists = [];
|
|
|
|
for(const item of desc) {
|
|
const n = item._name;
|
|
|
|
if(!params.hasOwnProperty(n)) {
|
|
notExists.push(item);
|
|
continue;
|
|
}
|
|
|
|
const vals = Array.isArray(params[n])? params[n] : [params[n]];
|
|
delete params[n];
|
|
|
|
let res;
|
|
for(const v of vals)
|
|
if(Q.isRejected(res = item._saveVal(params, v)))
|
|
return res;
|
|
}
|
|
|
|
return this._setDefaults(params, notExists);
|
|
}
|
|
|
|
_parseArr(argv) {
|
|
return Q.when(this._parseCmd(argv), p =>
|
|
Q.when(p.cmd._parseOptsAndArgs(p.argv), r => ({
|
|
cmd : p.cmd,
|
|
opts : r.opts,
|
|
args : r.args
|
|
})));
|
|
}
|
|
|
|
_do(inputPromise) {
|
|
return Q.when(inputPromise, input => {
|
|
return [this._checkRequired]
|
|
.concat(input.cmd._act || [])
|
|
.reduce((res, act) =>
|
|
Q.when(res, prev => act.call(input.cmd, input.opts, input.args, prev)),
|
|
undefined);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Parse arguments from simple format like NodeJS process.argv
|
|
* and run ahead current program, i.e. call process.exit when all actions done.
|
|
*
|
|
* @param {String[]} argv - arguments
|
|
* @returns {COA.Cmd} - this instance (for chainability)
|
|
*/
|
|
run(argv) {
|
|
argv || (argv = process.argv.slice(2));
|
|
|
|
const cb = code =>
|
|
res => res?
|
|
this._exit(res.stack || res.toString(), (res.hasOwnProperty('exitCode')? res.exitCode : code) || 0) :
|
|
this._exit();
|
|
|
|
Q.when(this.do(argv), cb(0), cb(1)).done();
|
|
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Invoke specified (or current) command using provided
|
|
* options and arguments.
|
|
*
|
|
* @param {String|String[]} [cmds] - subcommand to invoke (optional)
|
|
* @param {Object} [opts] - command options (optional)
|
|
* @param {Object} [args] - command arguments (optional)
|
|
* @returns {Q.Promise}
|
|
*/
|
|
invoke(cmds, opts, args) {
|
|
cmds || (cmds = []);
|
|
opts || (opts = {});
|
|
args || (args = {});
|
|
typeof cmds === 'string' && (cmds = cmds.split(' '));
|
|
|
|
if(arguments.length < 3 && !Array.isArray(cmds)) {
|
|
args = opts;
|
|
opts = cmds;
|
|
cmds = [];
|
|
}
|
|
|
|
return Q.when(this._parseCmd(cmds), p => {
|
|
if(p.argv.length)
|
|
return this.reject(`Unknown command: ${cmds.join(' ')}`);
|
|
|
|
return Q.all([
|
|
this._processParams(opts, this._opts),
|
|
this._processParams(args, this._args)
|
|
]).spread((_opts, _args) =>
|
|
this._do({
|
|
cmd : p.cmd,
|
|
opts : _opts,
|
|
args : _args
|
|
})
|
|
.fail(res => (res && res.exitCode === 0)?
|
|
res.toString() :
|
|
this.reject(res)));
|
|
});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Convenient function to run command from tests.
|
|
*
|
|
* @param {String[]} argv - arguments
|
|
* @returns {Q.Promise}
|
|
*/
|
|
Cmd.prototype.do = function(argv) {
|
|
return this._do(this._parseArr(argv || []));
|
|
};
|
|
|
|
module.exports = Cmd;
|