ChangeLog file removed from v4l-dvb Mercurial tree

From: Mauro Carvalho Chehab <mchehab@infradead.org>

- This patch removes ChangeLog file. with Mercurial, it can
  be generated any time by running hg logs -v.

- Makefile and prep_commit_msg.pl updated to work without ChangeLog.

- Removed/Adapted instructions on README.HG about ChangeLog.

- prepare-Changelog.pl changed to just report one line. This might help
  people to identify functions that were changed by a patchset.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 24 insertions, 31 deletions

diff --git a/v4l/scripts/prep_commit_msg.pl b/v4l/scripts/prep_commit_msg.pl
index 239fb6092..9c4447313 100755
--- a/v4l/scripts/prep_commit_msg.pl
+++ b/v4l/scripts/prep_commit_msg.pl
@@ -1,41 +1,34 @@
 #!/usr/bin/perl
 
 $f=shift; 
-open IN,"<$f"; 
+open IN,"hg diff|diffstat -p1 |"; 
 my $n=2;
 my $from="";
 my $first="";
 my $changed="";
 $out="";
 while (<IN>) {
-	if (m/^[0-9]/) {
-		$n--;
-		next;
-	}
-	if ($n>0) {
-		s/[\t -]*//;
-		if (m/^\* (.*):/) {
-			$changed="#\t$1\n$changed";
-		} else {
-			if ($first eq "") {
-				if ($_ eq "\n") {
-					next;
-				}
-				$first="$_";
-				next;
-			}
-			if ($from eq "") {
-				if (m/Signed-off-by:/) {
-					$from = $_;
-					$from =~ s/Signed-off-by/From/;
-					$first="$first\n#\n# Then From line\n$from\n";
-				}
-			}
-			$out="$out$_";
-		}
-	} 
+	$changed="$changed#$_";
 }
-printf  "#Added/removed/changed files:\n%s" .
-	"# First line should be the subject, without Subject:\n%s" .
-	"# Then a detailed description followed by Signed-off-by: fields:\n%s",
-	$changed,$first,$out;
+
+my $user = $ENV{HGUSER};
+
+if ( $user eq "" ) {
+	my $name = $ENV{CHANGE_LOG_NAME};
+	my $email = $ENV{CHANGE_LOG_EMAIL_ADDRESS};
+
+	$user="$name <$email>";
+}
+
+$first= "# Please change bellow if you are not patch author\n#\nFrom: $user";
+$out= "# At the end Signed-off-by: fields by patch author and commiter, at least\n#\nSigned-off-by: $user";
+$from= "From: $user";
+
+printf  "#Added/removed/changed files:\n%s#\n" .
+	"# For better log display, please keep a blank line after subject, after from\n" .
+	"# and before signed-off-by\n" .
+	"# First line should be the subject, without Subject:\n#\n\n\n" .
+	"# Now, patch author (just the main one), on a From: field\n" .
+	"# Please change bellow if the commiter is not the patch author\n#\n%s\n\n" .
+	"# Then a detailed description:\n\n\n%s",
+	$changed,$from,$out;