greenlock.js/bin/lib/cli.js

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'use strict';
var CLI = module.exports;
var defaultConf;
var defaultOpts;
var bags = [];
CLI.parse = function(conf) {
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var opts = (defaultOpts = {});
defaultConf = conf;
Object.keys(conf).forEach(function(k) {
var v = conf[k];
if (!v) {
console.error(
'Developer Error: missing cli flag definition for',
JSON.stringify(k)
);
process.exit(1);
}
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var aliases = v[5];
var bag;
var bagName;
// the name of the argument set is now the 0th argument
v.unshift(k);
// v[0] flagname
// v[1] short flagname
// v[2] description
// v[3] type
// v[4] default value
// v[5] aliases
if ('bag' === v[3]) {
bag = v[0]; // 'bag-option-xxxx' => '--bag-option-'
bag = '--' + bag.replace(/xxx.*/, '');
bags.push(bag);
bagName = toBagName(bag.replace(/^--/, ''));
opts[bagName] = {};
}
if ('json' === v[3]) {
bagName = toBagName(v[0].replace(/-json$/, '')); // 'bag-option-json' => 'bagOptionOpts'
opts[bagName] = {};
} else if ('ignore' !== v[3] && 'undefined' !== typeof v[4]) {
// set the default values (where 'undefined' is not an allowed value)
opts[toCamel(k)] = v[4];
}
if (!aliases) {
aliases = [];
} else if ('string' === typeof aliases) {
aliases = aliases.split(',');
}
aliases.forEach(function(alias) {
if (alias in conf) {
throw new Error(
"Cannot alias '" +
alias +
"' from '" +
k +
"': option already exists"
);
}
conf[alias] = v;
});
});
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};
CLI.main = function(cb, args) {
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var leftovers = [];
var conf = defaultConf;
var opts = defaultOpts;
if (!opts) {
throw new Error("you didn't call `CLI.parse(configuration)`");
}
// TODO what's the existing API for this?
if (!args) {
args = process.argv.slice(2);
}
var flag;
var cnf;
var typ;
function grab(bag) {
var bagName = toBagName(bag);
if (bag !== flag.slice(0, bag.length)) {
return false;
}
opts[bagName][toCamel(flag.slice(bag.length))] = args.shift();
return true;
}
while (args.length) {
// take one off the top
flag = args.shift();
// mind the gap
if ('--' === flag) {
leftovers = leftovers.concat(args);
break;
}
// help!
if (
'--help' === flag ||
'-h' === flag ||
'/?' === flag ||
'help' === flag
) {
printHelp(conf);
process.exit(1);
}
// only long names are actually used
if ('--' !== flag.slice(0, 2)) {
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console.error("error: unrecognized flag '" + flag + "'");
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process.exit(1);
}
cnf = conf[flag.slice(2)];
if (!cnf) {
// look for arbitrary flags
if (bags.some(grab)) {
continue;
}
// other arbitrary args are not used
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console.error("unrecognized elided flag '" + flag + "'");
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process.exit(1);
}
// encourage switching to non-aliased version
if (flag !== '--' + cnf[0]) {
console.warn(
"use of '" +
flag +
"' is deprecated, use '--" +
cnf[0] +
"' instead"
);
}
// look for xxx-json flags
if ('json' === cnf[3]) {
try {
var json = JSON.parse(args.shift());
var bagName = toBagName(cnf[0].replace(/-json$/, ''));
Object.keys(json).forEach(function(k) {
opts[bagName][k] = json[k];
});
} catch (e) {
console.error("Could not parse option '" + flag + "' as JSON:");
console.error(e.message);
process.exit(1);
}
continue;
}
// set booleans, otherwise grab the next arg in line
typ = cnf[3];
// TODO --no-<whatever> to negate
if (Boolean === typ || 'boolean' === typ) {
opts[toCamel(cnf[0])] = true;
continue;
}
opts[toCamel(cnf[0])] = args.shift();
continue;
}
cb(leftovers, opts);
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};
function toCamel(str) {
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return str.replace(/-([a-z0-9])/g, function(m) {
return m[1].toUpperCase();
});
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}
function toBagName(bag) {
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// trim leading and trailing '-'
bag = bag.replace(/^-+/g, '').replace(/-+$/g, '');
return toCamel(bag) + 'Opts'; // '--bag-option-' => bagOptionOpts
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}
function printHelp(conf) {
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var flagLen = 0;
var typeLen = 0;
var defLen = 0;
Object.keys(conf).forEach(function(k) {
flagLen = Math.max(flagLen, conf[k][0].length);
typeLen = Math.max(typeLen, conf[k][3].length);
if ('undefined' !== typeof conf[k][4]) {
defLen = Math.max(
defLen,
'(Default: )'.length + String(conf[k][4]).length
);
}
});
Object.keys(conf).forEach(function(k) {
var v = conf[k];
// skip aliases
if (v[0] !== k) {
return;
}
var def = v[4];
if ('undefined' === typeof def) {
def = '';
} else {
def = '(default: ' + JSON.stringify(def) + ')';
}
var msg =
' --' +
v[0].padEnd(flagLen) +
' ' +
v[3].padStart(typeLen + 1) +
' ' +
(v[2] || '') +
' ' +
def; /*.padStart(defLen)*/
// v[0] flagname
// v[1] short flagname
// v[2] description
// v[3] type
// v[4] default value
// v[5] aliases
console.info(msg);
});
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}