[PATCH 2/2] gitlog-to-changelog: remove duplicates without warning messages.

[Gary V. Vaughan]

From: "Gary V. Vaughan" <address@hidden>

Now, when the new 'Omit-from-ChangeLog: Yes' tag is found in a commit
log entry, after git-log-fix edits have been applied, don't output
anything into the ChangeLog for that entry.

* bulid-aux/gitlog-to-changelog: Omit-from-ChangeLog is
a new log entry tag to skip legitimate log duplicates, without
emitting a noisy 'empty commit message' warning.
---
 build-aux/gitlog-to-changelog | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/build-aux/gitlog-to-changelog b/build-aux/gitlog-to-changelog
index 5261081..aeae458 100755
--- a/build-aux/gitlog-to-changelog
+++ b/build-aux/gitlog-to-changelog
@@ -99,6 +99,8 @@ at the beginning of a log message line.  They are not copied 
to the output.
   Co-authored-by: Joe User <address@hidden>
     List the specified name and email address on a second
     ChangeLog header, denoting a co-author.
+  Omit-from-ChangeLog: Yes
+    No ChangeLog entry is made for this commit.
   Signed-off-by: Joe User <address@hidden>
     These lines are simply elided.
 
@@ -323,10 +325,14 @@ sub git_dir_option($)
         strftime ("%F", localtime ($1)), $2;
 
       my @coauthors = grep /^Co-authored-by:.*$/, @line;
+
+      my $omit = grep /^Omit-from-ChangeLog:\s+[Yy]es$/, @line;
+
       # Omit meta-data lines we've already interpreted.
       @line = grep !/^(?:Signed-off-by:[ ].*>$
                        |Co-authored-by:[ ]
                        |Copyright-paperwork-exempt:[ ]
+                       |Omit-from-ChangeLog:[ ]
                        )/x, @line;
 
       # Remove leading and trailing blank lines.
@@ -356,7 +362,7 @@ sub git_dir_option($)
         {
           warn "$ME: warning: empty commit message:\n  $date_line\n";
         }
-      else
+      elsif ( ! $omit )
         {
           # If clustering of commit messages has been disabled, if this header
           # would be different from the previous date/name/email/coauthors 
header,
-- 
1.8.0.2