Embedded gist syntax for Ghost. Place in ./core/server/api/posts.js.

posts.js

//the code below will embed replace [gist id=x] tags with an embedded gist similar to the way the Wordpress Gist 
//plugin works. I wrote this in order to import posts from Wordpress. See //GB: for the changes.
//SPJ:  Updated for compatibility with Ghost 0.6.4

    /**
     * ### Read
     * Find a post, by ID, UUID, or Slug
     *
     * @public
     * @param {{id_or_slug (required), context, status, include, ...}} options
     * @return {Promise(Post)} Post
     */
    read: function read(options) {
        var attrs = ['id', 'slug', 'status', 'uuid'],
            data = _.pick(options, attrs);

        options = _.omit(options, attrs);

        // only published posts if no user is present
        if (!data.uuid && !(options.context && options.context.user)) {
            data.status = 'published';
        }

        if (options.include) {
            options.include = prepareInclude(options.include);
        }

        return dataProvider.Post.findOne(data, options).then(function (result) {
            var omitted;
            if (result) {
                omitted = result.toJSON(options);
                omitted.author = _.omit(omitted.author);
                omitted.user = _.omit(omitted.user);
                //GB: replace the gist tag with the embedded gist
                omitted.html = omitted.html.replace(/\[gist id=([a-z0-9]+)\]/g, "<script src=\"https://gist.github.com/$1.js\"></script>");
                return {posts: [omitted]};
            }

            return Promise.reject(new errors.NotFoundError('Post not found.'));
        });
    },

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with pain is gain