Sha256: 0c30e1ed99e25074a8a0efaa8d04658669d749e7658abd288e1388eb26e34e42
Contents?: true
Size: 1.87 KB
Versions: 72
Compression:
Stored size: 1.87 KB
Contents
var path = require('path')
, fs = require('fs')
, redeyed = require('..')
, vm = require('vm')
;
var samplePath = path.join(__dirname, 'sources', 'log.js')
, origCode = fs.readFileSync(samplePath, 'utf-8')
, kinds = ['silly', 'info', 'warn', 'error' ]
;
function replaceConsole(s, info) {
var code = info.code
, idx = info.tokenIndex
, tokens = info.tokens
, next = tokens[idx + 1].value
, kind = tokens[idx + 2].value
, openParen = tokens[idx + 3].value
, firstArgTkn = tokens[idx + 4]
, argIdx = idx + 3
, open
, tkn
;
if (kind === 'log') kind = 'silly';
// not a console.xxx(...) statement? -> just return original
if (next !== '.' || !~kinds.indexOf(kind) || openParen !== '(') return s;
// skip past arguments to console.xxx all args from ( to )
open = 1;
while (open) {
tkn = tokens[++argIdx];
// count open parens vs. closed ones to handle things like console.log(new Error('..'));
if (tkn.value === '(') open++;
if (tkn.value === ')') open--;
}
// tkn now is the last closing paren
var argsIncludingClosingParen = code.slice(firstArgTkn.range[0], tkn.range[1])
, result = 'log.' + kind + '("main-logger", ' + argsIncludingClosingParen;
// tell redeyed to skip the entire console.xxx(..) statement since we are replacing it all
return { replacement: result, skipPastToken: tkn };
}
function transformAndRun () {
var config = {
Identifier: { console: replaceConsole }
}
, code = redeyed(origCode, config).code
, context = vm.createContext({ require: require });
console.log('Original code:\n', origCode);
console.log('\nlog calls replaced:\n', code);
console.log('\nLets run it:');
vm.runInContext(code, context, 'transformed-log.vm');
}
transformAndRun();
Version data entries
72 entries across 72 versions & 3 rubygems