Add more links to the changelog and blog

Library/Homebrew/cmd/update-report.rb

@@ -78,6 +78,7 @@ def update_report
     install_core_tap_if_necessary
 
     updated = false
+    new_repository_version = nil
 
     initial_revision = ENV["HOMEBREW_UPDATE_BEFORE"].to_s
     current_revision = ENV["HOMEBREW_UPDATE_AFTER"].to_s
@@ -87,6 +88,22 @@ def update_report
       update_preinstall_header args: args
       puts "Updated Homebrew from #{shorten_revision(initial_revision)} to #{shorten_revision(current_revision)}."
       updated = true
+
+      old_tag = if (HOMEBREW_REPOSITORY/".git/config").exist?
+        Utils.popen_read(
+          "git", "config", "--file=#{HOMEBREW_REPOSITORY}/.git/config", "--get", "homebrew.latesttag"
+        ).chomp.presence
+      end
+
+      new_tag = Utils.popen_read(
+        "git", "-C", HOMEBREW_REPOSITORY, "tag", "--list", "--sort=-version:refname"
+      ).lines.first.chomp
+
+      if new_tag != old_tag
+        system "git", "config", "--file=#{HOMEBREW_REPOSITORY}/.git/config",
+               "--replace-all", "homebrew.latesttag", new_tag
+        new_repository_version = new_tag
+      end
     end
 
     Homebrew.failed = true if ENV["HOMEBREW_UPDATE_FAILED"]
@@ -136,6 +153,21 @@ def update_report
     Commands.rebuild_commands_completion_list
     link_completions_manpages_and_docs
     Tap.each(&:link_completions_and_manpages)
+
+    return if new_repository_version.blank?
+
+    ohai "Homebrew was updated to version #{new_repository_version}"
+    if new_repository_version.split(".").last == "0"
+      puts <<~EOS
+        More detailed release notes are available on the Homebrew Blog:
+          #{Formatter.url("https://brew.sh/blog/#{new_repository_version}")}
+      EOS
+    else
+      puts <<~EOS
+        The changelog can be found at:
+          #{Formatter.url("https://github.com/Homebrew/brew/releases/tag/#{new_repository_version}")}
+      EOS
+    end
   end
 
   def shorten_revision(revision)

Library/Homebrew/dev-cmd/release-notes.rb

@@ -17,6 +17,10 @@ def release_notes_args
         Print the merged pull requests on Homebrew/brew between two Git refs.
         If no <previous_tag> is provided it defaults to the latest tag.
         If no <end_ref> is provided it defaults to `origin/master`.
+
+        If `--markdown` and a <previous_tag> are passed, an extra line containing
+        a link to the Homebrew blog will be adding to the output. Additionally,
+        a warning will be shown if the latest minor release was less than one month ago.
       EOS
       switch "--markdown",
              description: "Print as a Markdown list."
@@ -29,6 +33,16 @@ def release_notes
     args = release_notes_args.parse
 
     previous_tag = args.named.first
+
+    if previous_tag.present?
+      most_recent_major_minor_tag = previous_tag.sub(/\d+$/, "0")
+      one_month_ago = Date.today << 1
+      previous_tag_date = Date.parse Utils.popen_read(
+        "git", "-C", HOMEBREW_REPOSITORY, "log", "-1", "--format=%aI", most_recent_major_minor_tag
+      )
+      opoo "The latest major/minor release was less than one month ago." if previous_tag_date > one_month_ago
+    end
+
     previous_tag ||= Utils.popen_read(
       "git", "-C", HOMEBREW_REPOSITORY, "tag", "--list", "--sort=-version:refname"
     ).lines.first.chomp
@@ -58,6 +72,9 @@ def release_notes
     end
 
     $stderr.puts "Release notes between #{previous_tag} and #{end_ref}:"
+    if args.markdown? && args.named.first
+      puts "Release notes for major and minor releases can be found in the [Homebrew blog](https://brew.sh/blog/)."
+    end
     puts output
   end
 end

docs/Manpage.md

@@ -1197,6 +1197,10 @@ Print the merged pull requests on Homebrew/brew between two Git refs.
 If no *`previous_tag`* is provided it defaults to the latest tag.
 If no *`end_ref`* is provided it defaults to `origin/master`.
 
+If `--markdown` and a *`previous_tag`* are passed, an extra line containing
+a link to the Homebrew blog will be adding to the output. Additionally,
+a warning will be shown if the latest minor release was less than one month ago.
+
 * `--markdown`:
   Print as a Markdown list.
 

manpages/brew.1

@@ -1672,6 +1672,9 @@ Use \fBstackprof\fR instead of \fBruby\-prof\fR (the default)\.
 .SS "\fBrelease\-notes\fR [\fIoptions\fR] [\fIprevious_tag\fR] [\fIend_ref\fR]"
 Print the merged pull requests on Homebrew/brew between two Git refs\. If no \fIprevious_tag\fR is provided it defaults to the latest tag\. If no \fIend_ref\fR is provided it defaults to \fBorigin/master\fR\.
 .
+.P
+If \fB\-\-markdown\fR and a \fIprevious_tag\fR are passed, an extra line containing a link to the Homebrew blog will be adding to the output\. Additionally, a warning will be shown if the latest minor release was less than one month ago\.
+.
 .TP
 \fB\-\-markdown\fR
 Print as a Markdown list\.