@coffeelint/cli/lib/rules/no_tabs.js

Lint your CoffeeScript

(function() {
  var NoTabs, indentationRegex,
    indexOf = [].indexOf;

  indentationRegex = /\S/;

  module.exports = NoTabs = (function() {
    class NoTabs {
      lintLine(line, lineApi) {
        var indentation;
        // Only check lines that have compiled tokens. This helps
        // us ignore tabs in the middle of multi line strings, heredocs, etc.
        // since they are all reduced to a single token whose line number
        // is the start of the expression.
        indentation = line.split(indentationRegex)[0];
        if (lineApi.lineHasToken() && indexOf.call(indentation, '\t') >= 0) {
          return {
            columnNumber: indentation.indexOf('\t')
          };
        } else if (lineApi.lineHasToken() && line.match(/\t *$/)) {
          return {
            columnNumber: indentation.indexOf('\t')
          };
        } else {
          return null;
        }
      }

    };

    NoTabs.prototype.rule = {
      type: 'style',
      name: 'no_tabs',
      level: 'error',
      message: 'Line contains tab indentation',
      description: `This rule forbids tabs in indentation. Enough said. It is enabled by
default.`
    };

    return NoTabs;

  }).call(this);

}).call(this);