From a33f4e0fd1faf60289903cacc89f649739c1b849 Mon Sep 17 00:00:00 2001
From: Rylan Polster <rslpolster@gmail.com>
Date: Mon, 28 Dec 2020 10:37:09 -0500
Subject: [PATCH] release-notes: show warning on recent major/minor tag

---
 Library/Homebrew/dev-cmd/release-notes.rb | 13 +++++++++++++
 docs/Manpage.md                           |  4 ++++
 manpages/brew.1                           |  3 +++
 3 files changed, 20 insertions(+)

diff --git a/Library/Homebrew/dev-cmd/release-notes.rb b/Library/Homebrew/dev-cmd/release-notes.rb
index 925433ca87..1c9069af25 100644
--- a/Library/Homebrew/dev-cmd/release-notes.rb
+++ b/Library/Homebrew/dev-cmd/release-notes.rb
@@ -17,6 +17,10 @@ module Homebrew
         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 containg
+        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 +33,15 @@ module Homebrew
     args = release_notes_args.parse
 
     previous_tag = args.named.first
+
+    if previous_tag.present?
+
+      previous_tag_date = Date.parse Utils.popen_read(
+        "git", "-C", HOMEBREW_REPOSITORY, "log", "-1", "--format=%aI", previous_tag.sub(/\d+$/, "0")
+      )
+      opoo "The latest major/minor release was less than one month ago." if previous_tag_date > (Date.today << 1)
+    end
+
     previous_tag ||= Utils.popen_read(
       "git", "-C", HOMEBREW_REPOSITORY, "tag", "--list", "--sort=-version:refname"
     ).lines.first.chomp
diff --git a/docs/Manpage.md b/docs/Manpage.md
index 7bc638a186..edcf3931b1 100644
--- a/docs/Manpage.md
+++ b/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 containg
+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.
 
diff --git a/manpages/brew.1 b/manpages/brew.1
index 5a8a4b8b13..b5f5de5e18 100644
--- a/manpages/brew.1
+++ b/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 containg 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\.