Automatically generate release blog post

Author: achow101

_data/translations.yml

@@ -11,6 +11,7 @@ en:
   rss_feed: "Bitcoin Core Blog RSS Feed"
   rss_meetings_feed: "Meetings feed"
   rss_blog_feed: "Blog posts feed"
+  released: "Bitcoin Core %version Released"
   release_excerpt: "Bitcoin Core version %version is now available"
 
 zh_CN:
@@ -26,6 +27,7 @@ zh_CN:
   rss_feed: "Bitcoin Core Blog RSS Feed"
   rss_meetings_feed: "Meetings feed"
   rss_blog_feed: "Blog posts feed"
+  released: ""
   release_excerpt: ""
 
 zh_TW:
@@ -41,6 +43,7 @@ zh_TW:
   rss_feed: "Bitcoin Core Blog RSS Feed"
   rss_meetings_feed: "Meetings feed"
   rss_blog_feed: "Blog posts feed"
+  released: ""
   release_excerpt: ""
 
 ja:
@@ -56,6 +59,7 @@ ja:
   rss_feed: "Bitcoin Core Blog RSS Feed"
   rss_meetings_feed: "Meetings feed"
   rss_blog_feed: "Blog posts feed"
+  released: "Bitcoin Core 29.0 リリース"
   release_excerpt: "Bitcoin Core バージョン %version が利用可能になりました"
 
 es:
@@ -71,4 +75,5 @@ es:
   rss_feed: "Fuente RSS del Blog de Bitcoin Core"
   rss_meetings_feed: "Feed de reuniones"
   rss_blog_feed: "Feed de entradas del blog"
+  released: "Lanzamiento de Bitcoin Core %version"
   release_excerpt: "Bitcoin Core versión %version ya está disponible"

_includes/posts/en/release-blog-major.md

@@ -0,0 +1,16 @@
+Bitcoin Core version {{ page.release_version }} is now available for [download][download
+page].  See the [release notes][release notes] for more information about the
+features and bug fixes in this release.
+
+With the release of this new major version, versions {{ page.eol_version }} and older are at
+"Maintenance End" and will no longer receive updates. In accordance with the
+[security policy][security policy], two weeks after this release, medium and
+high severity vulnerabilities affecting versions {{ page.eol_version }} (if any) will be
+disclosed.  Additionally, low severity vulnerabilities affecting versions {{ page.old_version }}
+(if any) will be disclosed.
+
+[release notes]: /en/releases/{{ page.release_version}}/
+[download page]: /en/download
+[security policy]: /en/security-advisories
+
+{% include references.md %}

_includes/posts/en/release-blog-minor.md

@@ -0,0 +1,13 @@
+Bitcoin Core version {{ page.release_version }} is now available for [download][download
+page].  See the [release notes][] for more information about the
+bug fixes in this release.
+
+If you have any questions, please stop by the #bitcoin IRC chatroom
+([IRC][irc], [web][web irc]) and we’ll do our best to help you.
+
+[release notes]: /en/releases/{{ page.release_version }}/
+[IRC]: irc://irc.libera.chat/bitcoin
+[web irc]: https://web.libera.chat/#bitcoin
+[download page]: /en/download
+
+{% include references.md %}

_includes/posts/es/release-blog-minor.md

@@ -0,0 +1,13 @@
+La versión {{ page.release_version}} de Bitcoin Core ya está disponible para su [descarga][download
+page]. Vea las [notas de lanzamiento][] para más información sobre los arreglos de fallos que trae esta nueva edición.
+
+Si tiene alguna pregunta, por favor diríjase a la sala de IRC #bitcoin
+(en idioma inglés, [IRC][irc], [web][web irc]) y haremos lo que esté
+en nuestras manos para ayudarle.
+
+[notas de lanzamiento]: /es/releases/{{ page.release_version}}/
+[IRC]: irc://irc.libera.chat/bitcoin
+[web irc]: https://web.libera.chat/#bitcoin
+[download page]: /es/download
+
+{% include references.md %}

_includes/posts/ja/release-blog-major.md

@@ -0,0 +1,14 @@
+Bitcoin Core バージョン {{ page.release_version }}が[ダウンロード][download page]できるようになりました。
+このリリースのバグ修正の詳細については、[リリースノート][release notes]をご覧ください。
+
+この新しいメジャーバージョンのリリースに伴い、バージョン{{ page.eol_version }}以前のバージョンは
+「メンテナンス終了」となり、アップデートの提供が停止されます。
+[セキュリティポリシー][security policy]に従い、このリリースの2週間後に、
+バージョン26.xに影響する重大度中および高の脆弱性（存在する場合）が公開されます。
+さらに、バージョン{{ page.old_version }}に影響する重大度低の脆弱性（存在する場合）も公開されます。
+
+[release notes]: /ja/releases/{{ page.release_version }}/
+[download page]: /ja/download
+[security policy]: /ja/security-advisories
+
+{% include references.md %}

_includes/posts/ja/release-blog-minor.md

@@ -0,0 +1,12 @@
+Bitcoin Core バージョン {{ page.release_version }}が[ダウンロード][download page]できるようになりました。
+このリリースのバグ修正の詳細については、[リリースノート][release notes]をご覧ください。
+
+ご不明な点がありましたら、#bitcoin IRCチャットルーム([IRC][irc]、[web][web irc])にお立ち寄りください。
+可能な限り支援します。
+
+[release notes]: /ja/releases/{{ page.release_version }}/
+[IRC]: irc://irc.libera.chat/bitcoin
+[web irc]: https://web.libera.chat/#bitcoin
+[download page]: /ja/download
+
+{% include references.md %}

_plugins/release-posts.rb

@@ -1,5 +1,14 @@
 class ReleasePostGenerator < Jekyll::Generator
   def generate(site)
+
+    release_blog_templates = {}
+    site.data["translations"].each do |lang, _|
+      release_blog_templates[lang] = [
+        File.exists?(File.join(site.source, "_includes", "posts", lang, "release-blog-major.md")),
+        File.exists?(File.join(site.source, "_includes", "posts", lang, "release-blog-minor.md")),
+      ]
+    end
+
     site.documents.each do |page|
       next unless page.data.key?("release")
 
@@ -21,6 +30,41 @@ def generate(site)
 
       # Wrap the page with the download include and githubify
       page.content = "{% include download.html %}\n{% githubify https://github.com/bitcoin/bitcoin %}\n#{page.content}\n{% endgithubify %}"
+
+      # Generate the release blog post if we have the templates
+      is_major = version[1] == 0
+      if version[1] >= 28 and ((is_major and release_blog_templates[lang][0]) or (not is_major and release_blog_templates[lang][1]))
+        release_blog_id = "#{lang}-blog-release-#{version_str}"
+        if not site.posts.docs.find { |post| post.data["id"] == release_blog_id }
+          date = page.data["date"]
+          release_blog = Jekyll::Document.new("_posts/#{lang}/posts/#{date.strftime('%F')}-release-#{version_str}.md", site: site, collection: site.posts)
+          release_blog.data["date"] = date
+          release_blog.data["name"] = "blog-release-#{version_str}"
+          release_blog.data["id"] = release_blog_id
+          release_blog.data["lang"] = lang
+          release_blog.data["type"] = "posts"
+          release_blog.data["layout"] = "post"
+          release_blog.data["version"] = 1
+          release_blog.data["announcement"] = 1
+          release_blog.data["excerpt"] = page.data["excerpt"]
+          release_blog.data["release_version"] = version_str
+          release_blog.data["title"] = site.data["translations"][lang]['released'].sub("%version", version_str)
+          release_blog.data["permalink"] = "/#{lang}/#{date.strftime('%Y/%m/%d')}/release-#{version_str}/"
+
+          if is_major and release_blog_templates[lang][0]
+            release_blog.data["eol_version"] = "#{version[0] - 3}.x"
+            release_blog.data["old_version"] = "#{version[0] - 1}.x"
+
+            release_blog.content = "{% include posts/#{lang}/release-blog-major.md %}"
+          elsif not is_major and release_blog_templates[lang][1]
+            release_blog.content = "{% include posts/#{lang}/release-blog-minor.md %}"
+          end
+
+          site.posts.docs << release_blog
+        end
+      end
     end
+
+  site.posts.docs.sort_by!(&:date)
   end
 end