git-csv-diff

Git CSV Diff

Library generate difference between csv-files based on Git commit hash

Installation

Make sure you have node.js (version 4.x.x or higher) installed on your computer.

    npm i git-csv-diff

Usage, Diff generated in Memory

const gitCsvDiff = require('git-csv-diff');

/*
    fileName: 'ddf--datapoints--forest_products_removal_total_dollar--by--geo--time.csv';
    diff: {
        from: 'state of the base file'
        to: 'state of the target file'
    };
    fileModifier: 'M'/'D'/'A'
*/

let diffResult = {};

gitCsvDiff.process(fileName, diff, fileModifier, function(error, result) {
  //console.log("Files:", result.file);
  //console.log("Changes:", result.diff);
  diffResult[result.file] = result.diff;

  gitCsvDiff.translations(diffResult);
});

Usage, generate Diff partially and write result by chunk into streams

const gitCsvDiff = require('git-csv-diff');

/*
    const metaData = {
      fileName: "lang/nl-nl/ddf--entities--region.csv",
      fileModifier: "M",
      datapackage: {
        old: 'datapackage.json file state based on commit From',
        new: 'datapackage.json file state based on commit To'
      }
    };

    const dataDiff = {
      from: 'csv file state based on commit From',
      to: 'csv file state based on commit To',
    };

    const streams = {
      diff: fs.createWriteStream('path-to-output.txt'),
      lang: fs.createWriteStream('path-to-output-for-language.txt')
    };
*/

gitCsvDiff.processUpdated(metaData, dataDiff, streams, function(){
  //console.log("Done!");
  streams.diff.end();
  streams.lang.end();
});