breaking changes: Open_Graph_meta 設置更改，可配置其它參數

feature: 更新 Facebook sdk 到 v15
improvement: 更新 plugins.yml
Remove: 移除 meta keywords

_config.yml

@@ -857,7 +857,16 @@ lazyload:
 
 # Open graph meta tags
 # https://developers.facebook.com/docs/sharing/webmasters/
-Open_Graph_meta: true
+Open_Graph_meta:
+  enable: true
+  option:
+    # twitter_card:
+    # twitter_image:
+    # twitter_id:
+    # twitter_site:
+    # google_plus:
+    # fb_admins:
+    # fb_app_id:
 
 # Add the vendor prefixes to ensure compatibility
 css_prefix: true

layout/includes/head.pug

@@ -7,11 +7,6 @@
 
 - var isSubtitle = config.subtitle ? ' - ' + config.subtitle : ''
 - var tabTitle = is_home() || !pageTitle ? config.title + isSubtitle : pageTitle + ' | ' + config.title
-
-- var pageKeywords
-- if (page.keywords) pageKeywords = Array.isArray(page.keywords) ? (page.keywords).join(',') :  ([]).join(',') || page.keywords
-- else if (page.tags && page.tags.length) pageKeywords = page.tags.data.map(function(tag) {return tag.name;}).join(',')
-- else pageKeywords = Array.isArray(config.keywords) ? (config.keywords).join(','):  ([]).join(',') || config.keywords
 - var pageAuthor = config.email ? config.author + ',' + config.email : config.author
 - var pageCopyright = config.copyright || config.author
 - var themeColorLight = theme.theme_color && theme.theme_color.enable && theme.theme_color.meta_theme_color_light || '#ffffff'
@@ -22,8 +17,6 @@ meta(charset='UTF-8')
 meta(http-equiv="X-UA-Compatible" content="IE=edge")
 meta(name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no")
 title= tabTitle
-if pageKeywords
-  meta(name="keywords" content=pageKeywords)
 meta(name="author" content=pageAuthor)
 meta(name="copyright" content=pageCopyright)
 meta(name ="format-detection" content="telephone=no")

layout/includes/head/Open_Graph.pug

@@ -1,11 +1,13 @@
-if theme.Open_Graph_meta
-  - let contentType = is_post() ? 'article' : 'website'
-  - let metaImage = (page.cover || theme.avatar.img) ? full_url_for(page.cover || theme.avatar.img) : ''
-  - let fb_appId = theme.facebook_comments.app_id || ''
-  - let fb_admins = theme.facebook_comments.user_id || ''
-
-  != open_graph({type: contentType, image: metaImage, fb_admins: fb_admins, fb_app_id: fb_appId})
-
+if theme.Open_Graph_meta.enable
+  -
+    let ogOption = Object.assign({
+      type: is_post() ? 'article' : 'website',
+      image: (page.cover || theme.avatar.img) ? full_url_for(page.cover || theme.avatar.img) : '',
+      fb_admins: theme.facebook_comments.user_id || '',
+      fb_app_id: theme.facebook_comments.app_id || '',
+    }, theme.Open_Graph_meta.option)
+  -
+  != open_graph(ogOption)
 else
   meta(name="description" content=page_description())