Regex for Removing YAML Front Matter before processing Jekyll file in Gulp

rm-frontmatter.js

// taken from https://codepen.io/tech4him1/pen/dNyydZ

var replace = require('gulp-replace');

// Regex to recognize YAML Front Matter (at beginning of file, 3 hyphens, than any charecter, including newlines, then 3 hyphens).
var YAMLFrontMatter = /^---[.\r\n]*---/;

gulp.src('./!(_)**/*.md')
    .pipe(replace(YAMLFrontMatter, ''))
    .pipe(gulp.dest('./'));