Only nag to read news when there's news to read (#3699)

src/commands/CmdCustom.cpp

@@ -28,6 +28,7 @@
 // cmake.h include header must come first
 
 #include <CmdCustom.h>
+#include <CmdNews.h>
 #include <Context.h>
 #include <Filter.h>
 #include <Lexer.h>
@@ -222,11 +223,9 @@ int CmdCustom::execute(std::string& output) {
   }
 
   // Inform user about the new release highlights if not presented yet
-  Version news_version(Context::getContext().config.get("news.version"));
-  Version current_version = Version::Current();
-  auto should_nag = news_version != current_version && Context::getContext().verbose("news");
-  if (should_nag) {
+  if (CmdNews::should_nag()) {
     std::ostringstream notice;
+    Version current_version = Version::Current();
     notice << "Recently upgraded to " << current_version
            << ". "
               "Please run 'task news' to read highlights about the new release.";

src/commands/CmdNews.cpp

@@ -615,3 +615,28 @@ int CmdNews::execute(std::string& output) {
 
   return 0;
 }
+
+bool CmdNews::should_nag() {
+  if (!Context::getContext().verbose("news")) {
+    return false;
+  }
+
+  Version news_version(Context::getContext().config.get("news.version"));
+  if (!news_version.is_valid()) news_version = Version("2.6.0");
+
+  Version current_version = Version::Current();
+
+  if (news_version == current_version) {
+    return true;
+  }
+
+  // Check if there are actually any interesting news items to show.
+  std::vector<NewsItem> items = NewsItem::all();
+  for (auto& item : items) {
+    if (item._version > news_version) {
+      return true;
+    }
+  }
+
+  return false;
+}

src/commands/CmdNews.h

@@ -63,6 +63,8 @@ class CmdNews : public Command {
  public:
   CmdNews();
   int execute(std::string&);
+
+  static bool should_nag();
 };
 
 #endif