Dynamically search and replace server logs when they change. Uses gulp.js and node

package.json

{
  "name": "process-log",
  "version": "1.0.0",
  "description": "Dynamically search and replace server logs when they change",
  "main": "gulpfile.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [
    "logs"
  ],
  "author": "Jan Beck",
  "license": "MIT",
  "dependencies": {
    "gulp": "^3.9.1",
    "gulp-replace": "^0.6.1",
    "minimist": "^1.2.0"
  }
}

process-log.js

// USAGE: gulp process-log -s <SEARCH> -r <REPLACE> -f <FILE>

var gulp      = require('gulp'),
    replace   = require('gulp-replace'),
    path      = require('path'),
    minimist  = require('minimist'),
    options   = minimist(process.argv.slice(2)),
    FgMagenta = "\x1b[35m",
    FgCyan    = "\x1b[36m",
    FgNormal  = "\x1b[0m";



gulp.task('process-log', function(){
    
    // watch given file for changes 
    gulp.watch(String(options.f), function(event){
        
        console.log('Processing file', FgMagenta, String(event.path), FgNormal );
        
        gulp.src([event.path])
            // perform search replace with given options
            .pipe(replace(String(options.s), String(options.r)))
            // overwrite original
            .pipe(gulp.dest(path.dirname(event.path)));
        
        console.log('Replaced all instances of', FgCyan, String(options.s), FgNormal, 'with', FgCyan, String(options.r), FgNormal );
        
        return true;
    });
})