ignore files command line flag

Author: whyboris

src/cli.js

@@ -26,7 +26,7 @@
    * Input
    */
 
-  Diff2HtmlInterface.prototype.getInput = function getInput(inputType, inputArgs, callback) {
+  Diff2HtmlInterface.prototype.getInput = function getInput(inputType, inputArgs, ignore, callback) {
     var that = this;
     switch (inputType) {
       case 'file':
@@ -38,25 +38,26 @@
         break;
 
       default:
-        that._runGitDiff(inputArgs, callback);
+        that._runGitDiff(inputArgs, ignore, callback);
     }
   };
 
-  Diff2HtmlInterface.prototype._runGitDiff = function(gitArgsArr, callback) {
+  Diff2HtmlInterface.prototype._runGitDiff = function(gitArgsArr, ignore, callback) {
     var gitArgs;
     if (gitArgsArr.length && gitArgsArr[0]) {
       gitArgs = gitArgsArr.map(function(arg) {
-        return '"' + arg + '"'; // wrap parameters
+        return '"' + (ignore ? ':(exclude)' : '') + arg + '"'; // wrap parameters
       }).join(' ');
     } else {
       gitArgs = '-M -C HEAD';
     }
 
-    if (gitArgs.indexOf('--no-color') < 0) {
+    if (!ignore && gitArgs.indexOf('--no-color') < 0) {
       gitArgs += ' --no-color';
     }
 
-    var diffCommand = 'git diff ' + gitArgs;
+    var diffCommand = 'git diff ' + (ignore ? '--no-color ' : '') + gitArgs;
+
     return callback(null, utils.runCmd(diffCommand));
   };
 

src/main.js

@@ -137,12 +137,23 @@ var argv = yargs.usage('Usage: diff2html [options] -- [diff args]')
       type: 'string'
     }
   })
+  .options({
+    'ig': {
+      alias: 'ignore',
+      describe: 'ignore a file',
+      nargs: 1,
+      type: 'boolean',
+      choices: [true, false],
+      default: false
+    }
+  })
   .example('diff2html -s line -f html -d word -i command -o preview -- -M HEAD~1',
     'diff last commit, line by line, word comparison between lines,' +
     'previewed in the browser and input from git diff command')
   .example('diff2html -i file -- my-file-diff.diff', 'reading the input from a file')
   .example('diff2html -f json -o stdout -- -M HEAD~1', 'print json format to stdout')
   .example('diff2html -F my-pretty-diff.html -- -M HEAD~1', 'print to file')
+  .example('diff2html -ig -- package-lock.json yarn.lock', 'ignore two particular files when generating diff')
   .help('h')
   .alias('h', 'help')
   .epilog('© 2014-' + currentYear + ' rtfpessoa\n' +
@@ -193,4 +204,4 @@ function onOutput(err, output) {
   }
 }
 
-cli.getInput(argv.input, argv._, onInput);
+cli.getInput(argv.input, argv._, argv.ig, onInput);