npm install gulp-ng-replace-directive-template
var gulp = require('gulp');
var gulpNgReplaceDirectiveTemplate = require('gulp-ng-replace-directive-template');
gulp.task("", function(callback) {
gulp.src('directives/*.html')
.pipe(gulpNgReplaceDirectiveTemplate({
options: ['1']
}))
.pipe(gulp.dest('build'))
});