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[New] extract
parse and quote to their own deep imports
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,203 +1,4 @@ | ||
| 'use strict'; | ||
|
|
||
| exports.quote = function (xs) { | ||
| return xs.map(function (s) { | ||
| if (s && typeof s === 'object') { | ||
| return s.op.replace(/(.)/g, '\\$1'); | ||
| } else if ((/["\s]/).test(s) && !(/'/).test(s)) { | ||
| return "'" + s.replace(/(['\\])/g, '\\$1') + "'"; | ||
| } else if ((/["'\s]/).test(s)) { | ||
| return '"' + s.replace(/(["\\$`!])/g, '\\$1') + '"'; | ||
| } | ||
| return String(s).replace(/([A-Za-z]:)?([#!"$&'()*,:;<=>?@[\\\]^`{|}])/g, '$1\\$2'); | ||
| }).join(' '); | ||
| }; | ||
|
|
||
| // '<(' is process substitution operator and | ||
| // can be parsed the same as control operator | ||
| var CONTROL = '(?:' + [ | ||
| '\\|\\|', '\\&\\&', ';;', '\\|\\&', '\\<\\(', '>>', '>\\&', '[&;()|<>]' | ||
| ].join('|') + ')'; | ||
| var META = '|&;()<> \\t'; | ||
| var BAREWORD = '(\\\\[\'"' + META + ']|[^\\s\'"' + META + '])+'; | ||
| var SINGLE_QUOTE = '"((\\\\"|[^"])*?)"'; | ||
| var DOUBLE_QUOTE = '\'((\\\\\'|[^\'])*?)\''; | ||
|
|
||
| var TOKEN = ''; | ||
| for (var i = 0; i < 4; i++) { | ||
| TOKEN += (Math.pow(16, 8) * Math.random()).toString(16); | ||
| } | ||
|
|
||
| function parse(s, env, opts) { | ||
| var chunker = new RegExp([ | ||
| '(' + CONTROL + ')', // control chars | ||
| '(' + BAREWORD + '|' + SINGLE_QUOTE + '|' + DOUBLE_QUOTE + ')*' | ||
| ].join('|'), 'g'); | ||
| var match = s.match(chunker).filter(Boolean); | ||
|
|
||
| if (!match) { | ||
| return []; | ||
| } | ||
| if (!env) { | ||
| env = {}; | ||
| } | ||
| if (!opts) { | ||
| opts = {}; | ||
| } | ||
|
|
||
| var commented = false; | ||
|
|
||
| function getVar(_, pre, key) { | ||
| var r = typeof env === 'function' ? env(key) : env[key]; | ||
| if (r === undefined && key != '') { | ||
| r = ''; | ||
| } else if (r === undefined) { | ||
| r = '$'; | ||
| } | ||
|
|
||
| if (typeof r === 'object') { | ||
| return pre + TOKEN + JSON.stringify(r) + TOKEN; | ||
| } | ||
| return pre + r; | ||
| } | ||
|
|
||
| return match.map(function (s, j) { | ||
| if (commented) { | ||
| return void undefined; | ||
| } | ||
| if (RegExp('^' + CONTROL + '$').test(s)) { | ||
| return { op: s }; | ||
| } | ||
|
|
||
| // Hand-written scanner/parser for Bash quoting rules: | ||
| // | ||
| // 1. inside single quotes, all characters are printed literally. | ||
| // 2. inside double quotes, all characters are printed literally | ||
| // except variables prefixed by '$' and backslashes followed by | ||
| // either a double quote or another backslash. | ||
| // 3. outside of any quotes, backslashes are treated as escape | ||
| // characters and not printed (unless they are themselves escaped) | ||
| // 4. quote context can switch mid-token if there is no whitespace | ||
| // between the two quote contexts (e.g. all'one'"token" parses as | ||
| // "allonetoken") | ||
| var SQ = "'"; | ||
| var DQ = '"'; | ||
| var DS = '$'; | ||
| var BS = opts.escape || '\\'; | ||
| var quote = false; | ||
| var esc = false; | ||
| var out = ''; | ||
| var isGlob = false; | ||
| var i; | ||
|
|
||
| function parseEnvVar() { | ||
| i += 1; | ||
| var varend; | ||
| var varname; | ||
| // debugger | ||
| if (s.charAt(i) === '{') { | ||
| i += 1; | ||
| if (s.charAt(i) === '}') { | ||
| throw new Error('Bad substitution: ' + s.substr(i - 2, 3)); | ||
| } | ||
| varend = s.indexOf('}', i); | ||
| if (varend < 0) { | ||
| throw new Error('Bad substitution: ' + s.substr(i)); | ||
| } | ||
| varname = s.substr(i, varend - i); | ||
| i = varend; | ||
| } else if ((/[*@#?$!_-]/).test(s.charAt(i))) { | ||
| varname = s.charAt(i); | ||
| i += 1; | ||
| } else { | ||
| varend = s.substr(i).match(/[^\w\d_]/); | ||
| if (!varend) { | ||
| varname = s.substr(i); | ||
| i = s.length; | ||
| } else { | ||
| varname = s.substr(i, varend.index); | ||
| i += varend.index - 1; | ||
| } | ||
| } | ||
| return getVar(null, '', varname); | ||
| } | ||
|
|
||
| for (i = 0; i < s.length; i++) { | ||
| var c = s.charAt(i); | ||
| isGlob = isGlob || (!quote && (c === '*' || c === '?')); | ||
| if (esc) { | ||
| out += c; | ||
| esc = false; | ||
| } else if (quote) { | ||
| if (c === quote) { | ||
| quote = false; | ||
| } else if (quote == SQ) { | ||
| out += c; | ||
| } else { // Double quote | ||
| if (c === BS) { | ||
| i += 1; | ||
| c = s.charAt(i); | ||
| if (c === DQ || c === BS || c === DS) { | ||
| out += c; | ||
| } else { | ||
| out += BS + c; | ||
| } | ||
| } else if (c === DS) { | ||
| out += parseEnvVar(); | ||
| } else { | ||
| out += c; | ||
| } | ||
| } | ||
| } else if (c === DQ || c === SQ) { | ||
| quote = c; | ||
| } else if (RegExp('^' + CONTROL + '$').test(c)) { | ||
| return { op: s }; | ||
| } else if ((/^#$/).test(c)) { | ||
| commented = true; | ||
| if (out.length) { | ||
| return [out, { comment: s.slice(i + 1) + match.slice(j + 1).join(' ') }]; | ||
| } | ||
| return [{ comment: s.slice(i + 1) + match.slice(j + 1).join(' ') }]; | ||
| } else if (c === BS) { | ||
| esc = true; | ||
| } else if (c === DS) { | ||
| out += parseEnvVar(); | ||
| } else { | ||
| out += c; | ||
| } | ||
| } | ||
|
|
||
| if (isGlob) { | ||
| return { op: 'glob', pattern: out }; | ||
| } | ||
|
|
||
| return out; | ||
| }).reduce(function (prev, arg) { // finalize parsed aruments | ||
| if (arg === undefined) { | ||
| return prev; | ||
| } | ||
| return prev.concat(arg); | ||
| }, []); | ||
| } | ||
|
|
||
| exports.parse = function (s, env, opts) { | ||
| var mapped = parse(s, env, opts); | ||
| if (typeof env !== 'function') { | ||
| return mapped; | ||
| } | ||
| return mapped.reduce(function (acc, s) { | ||
| if (typeof s === 'object') { | ||
| return acc.concat(s); | ||
| } | ||
| var xs = s.split(RegExp('(' + TOKEN + '.*?' + TOKEN + ')', 'g')); | ||
| if (xs.length === 1) { | ||
| return acc.concat(xs[0]); | ||
| } | ||
| return acc.concat(xs.filter(Boolean).map(function (x) { | ||
| if (RegExp('^' + TOKEN).test(x)) { | ||
| return JSON.parse(x.split(TOKEN)[1]); | ||
| } | ||
| return x; | ||
| })); | ||
| }, []); | ||
| }; | ||
| exports.quote = require('./quote'); | ||
| exports.parse = require('./parse'); |
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