Generate icons.

fonts.scss

/**
<%= fontName %> Webfont
*/
@font-face {
  font-family: '<%= fontName %>';
  src: url('../fonts/<%= fontName %>.eot?<%= fontDate %>');
  src: url('../fonts/<%= fontName %>.eot?#iefix-<%= fontDate %>') format('embedded-opentype'),
       url('../fonts/<%= fontName %>.woff2?<%= fontDate %>') format('woff2'),
       url('../fonts/<%= fontName %>.woff?<%= fontDate %>') format('woff'),
       url('../fonts/<%= fontName %>.ttf?<%= fontDate %>') format('truetype');
  font-weight: normal;
  font-style: normal;
}

[class^="lm-ico-"],
[class*=" lm-ico-"] {
  font-family: '<%= fontName %>' !important;
  speak: none;
  font-style: normal;
  font-weight: normal;
  font-variant: normal;
  text-transform: none;
  line-height: 1;

  /* Better Font Rendering =========== */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/*
Glyphs list
*/
<% _.each(glyphs, function(icon){ %>
.lm-ico-<%= icon.name.replace(/\s+/g,'-').replace(/[(!@#$)]/g, '') %>:before {
  content: '\<%= icon.unicode[0].charCodeAt(0).toString(16) %>';
}
<% }) %>

gulpfile.js

/**
 * Generate icons automaticaly
 */
gulp.task('generate-icons', function () {
  gulp.src('./skins/webmail2016/assets/icons/*.svg')
    .pipe(iconfont({
      fontName: 'icomoon',
      formats: ['ttf', 'eot', 'woff', 'woff2', 'svg'],
      appendCodepoints: true,
      appendUnicode: false,
      normalize: true,
      fontHeight: 1000,
      centerHorizontally: true
    }))
    .on('glyphs', function (glyphs, options) {
      gulp.src('./skins/webmail2016/assets/css/fonts.scss')
        .pipe(consolidate('underscore', {
          glyphs: glyphs,
          fontName: options.fontName,
          fontDate: new Date().getTime()
        }))
        .pipe(gulp.dest('./skins/webmail2016/assets/fonts'))
        .pipe(gulp.dest('./skins/webmail_mobile/assets/fonts'));
    })
    .pipe(gulp.dest('./skins/webmail2016/assets/fonts'))
    .pipe(gulp.dest('./skins/webmail_mobile/assets/fonts'));
});