changer

changer reads in files and modifies them according to rules that you specify. It can be used to automatically modify code, change text, or anything else.

Installation
``
npm install changer
`

To use changer you need to create some rules. A rule is a just a function, and it returns the (possibly modified) line of text. Here's an example rule:

`JavaScript
var replaceEvens = function( lineNumber, text ) {
if( lineNumber % 2 == 2 )
text.replace( "Hello", "Goodbye" );

return text;
}

var commentOut = function( lineNumber, text ) {
if( lineNumber > 50 && lineNumber < 60 )
text = "// " + text;

return text;
}

exports.rules = {
replace: replaceEvens,
commentOut: commentOut
}
`

Then in another file, we can apply the rules to some files

`JavaScript
var change = require("changer").change,
rules = require("./ruleSet");

// An array of filepaths
var files = [
'file1.txt'
'C:/file2.h'
'includes/file3.cpp'
];

// Batch process the files
for( var iFile=0; iFile change( rules.replaceEvens, files[iFile] );
change( rules.commentOut, files[iFile] );
}

// Do one more for good measure
change( rules.replaceEvens, "anotherfile.csv" );
``