From 1962573a9363c0c90c24dff6fc3dc1eaf96ab1cd Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Tue, 15 Jul 2025 17:43:57 +0200
Subject: [PATCH] release-notes.pl: ignore dupes on input and output

Re-running this script now makes it track the already mentioned
changelog entries and not add them again even if the git log contains
them.

This makes the script better handle reruns in a release branch after
rebasing on a later version of master.

Closes #17937
---
 scripts/release-notes.pl | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/scripts/release-notes.pl b/scripts/release-notes.pl
index c72b56de6e..741235a3e6 100755
--- a/scripts/release-notes.pl
+++ b/scripts/release-notes.pl
@@ -61,16 +61,29 @@ my @releasenotes=`cat RELEASE-NOTES`;
 my @o; # the entire new RELEASE-NOTES
 my @refused; # [num] = [2 bits of use info]
 my @refs; # [number] = [URL]
+my %dupe;
 for my $l (@releasenotes) {
     if($l =~ /^ o .*\[(\d+)\]/) {
         # referenced, set bit 0
         $refused[$1]=1;
+        my $m = $l;
+        chomp $m;
+        $m =~ s/^ o //;
+        $m =~ s/ \[\d+\]$//;
+        $dupe{$m} = 1; # mark this as present
     }
     elsif($l =~ /^ \[(\d+)\] = (.*)/) {
         # listed in a reference, set bit 1
         $refused[$1] |= 2;
         $refs[$1] = $2;
     }
+    # mention without reference
+    elsif($l =~ /^ o (.*)/) {
+        my $m = $l;
+        chomp $m;
+        $m =~ s/^ o //;
+        $dupe{$m} = 1; # mark this as present
+    }
 }
 
 # Return a new fresh reference number
@@ -156,6 +169,11 @@ sub onecommit {
     my ($short)=@_;
     my $ref;
 
+    if($dupe{$short}) {
+        # this git commit message was found in the file
+        return;
+    }
+
     if($bug[0]) {
         $ref = $bug[0];
     }
@@ -185,6 +203,11 @@ for my $l (@releasenotes) {
         push @o, $l;
         push @o, "\n";
         for my $f (@line) {
+            if($dupe{$f}) {
+                # this item is already listed
+                next;
+            }
+
             push @o, sprintf " o %s%s\n", $f,
                 $moreinfo{$f}? sprintf(" [%d]", $moreinfo{$f}): "";
             $refused[$moreinfo{$f}]=3;
-- 
2.47.2