Meta: prepare to use alternate name for the primary branch

Announce

 #!/bin/sh
 # Announcement message skelton
 #
+MASTER=master
+
 tmpbase=/var/tmp/git-announce.$$
 trap 'rm -f $tmpbase.*' 0
 branch=${1?branch}
@@ -17,7 +19,7 @@ maint)
 	kind="The latest maintenance release" ;;
 mainto/* | maint-[0-9]*)
 	kind="A maintenance release" ;;
-master)
+$MASTER)
 	kind="The latest feature release" ;;
 esac
 
@@ -62,7 +64,7 @@ EOF
 
 (
 	echo "$kind Git $relname is now available$for_testing at the usual places."
-	if test "$branch" = master
+	if test "$branch" = $MASTER
 	then
 		cat <<-EOF
 		It is comprised of $cnt non-merge commits since $previous,
@@ -111,7 +113,7 @@ fmt_people () {
 
 }
 
-if test "$branch" = master
+if test "$branch" = $MASTER
 then
 	cat <<-EOF
 

CheckPush

 #!/bin/sh
 
+MASTER=master
+
 for range in $(
 	prev_branch=
 	{
@@ -33,7 +35,7 @@ for range in $(
 		'
 		cat <<-EOF
 		maint
-		master
+		$MASTER
 		next
 		EOF
 	} |
@@ -59,7 +61,7 @@ if ! next_equiv=$(git rev-parse --verify 'jch^{/^### match next}' 2>/dev/null) |
    ! git diff --stat --exit-code next $next_equiv
 then
 	next_tree=$(git rev-parse next^{tree}) &&
-	next_equiv=$(git rev-list --first-parent master..seen |
+	next_equiv=$(git rev-list --first-parent $MASTER..seen |
 			xargs -n1 sh -c '
 				echo $(git rev-parse $1^{tree}) $1
 			' - | sed -n -e "s/^$next_tree //p"
@@ -68,13 +70,13 @@ fi
 
 if test -n "$next_equiv"
 then
-	jch=$(git rev-list --first-parent master..jch | wc -l) &&
-	seen=$(git rev-list --first-parent master..seen | wc -l) &&
-	next=$(git rev-list --first-parent master..$next_equiv | wc -l) &&
+	jch=$(git rev-list --first-parent $MASTER..jch | wc -l) &&
+	seen=$(git rev-list --first-parent $MASTER..seen | wc -l) &&
+	next=$(git rev-list --first-parent $MASTER..$next_equiv | wc -l) &&
 	if test $jch -le $next
 	then
-		echo "master..$jch..jch..$next..next..$seen..seen"
+		echo "$MASTER..$jch..jch..$next..next..$seen..seen"
 	else
-		echo "master..$next..next..$jch..jch..$seen..seen"
+		echo "$MASTER..$next..next..$jch..jch..$seen..seen"
 	fi
 fi

Doit

 #!/bin/sh
 
-test -n "$branches" || branches='next master maint jch seen'
+MASTER=master
+
+test -n "$branches" || branches="next $MASTER maint jch seen"
 
 changed=
 for b in $branches

Dothem

 #!/bin/sh
 
 NWD=contrib/workdir/git-new-workdir
+MASTER=master
 
 inst_prefix=$(
 	IFS=:
@@ -65,7 +66,7 @@ then
 		exit 1
 	fi
 fi
-test -n "$branches" || branches='next master maint jch seen'
+test -n "$branches" || branches="next $MASTER maint jch seen"
 test -n "$jobs" || jobs=-j2
 
 find_installed () {

KO

@@ -3,6 +3,8 @@
 # Not for general consumption; a script I used to make sure
 # I do not accidentally push a rewound master to public.
 
+MASTER=master
+
 no_fetch= ko=ko
 while :
 do
@@ -19,14 +21,14 @@ then
 	git fetch "$ko"
 fi
 
-mb=$(git merge-base $ko/master master)
-h=$(git rev-parse $mb $ko/master | sort -u | wc -l)
+mb=$(git merge-base $ko/$MASTER $MASTER)
+h=$(git rev-parse $mb $ko/$MASTER | sort -u | wc -l)
 if test "$h" != 1
 then
-	echo "OOOOOPPPPPPPPPPPPPPSSS! master is not $ko/master fast forward."
+	echo "OOOOOPPPPPPPPPPPPPPSSS! $MASTER is not $ko/$MASTER fast forward."
 	exit 1
 fi
-git show-branch --topo-order $ko/master master
+git show-branch --topo-order $ko/$MASTER $MASTER
 git show-branch --topo-order $ko/maint maint
 git show-branch --topo-order $ko/next next
 git show-branch --topo-order $ko/seen seen

ML

 #!/bin/sh
 # Merge later...
 
-: "${target:=maint}" "${here:=master}"
+MASTER=master
+
+: "${target:=maint}" "${here:=$MASTER}"
 
 # Read from RelNotes and find mergeable topics
 search_topics () {

Make

 #!/bin/sh
 
+MASTER=master
+
 if test -z "$GIT"
 then
 	case "$(git version 2>/dev/null)" in
@@ -215,7 +217,7 @@ export LANG LC_ALL
 branch=$(determine_branch)
 
 case "$branch" in
-next | maint | master | seen | jch)
+next | maint | $MASTER | seen | jch)
 	prefix="$inst_prefix/git-$branch"
 	;;
 snap)

WCBCC

 #!/bin/sh
 
+MASTER=master
 BASE=${1-HEAD}
 
 (
@@ -12,7 +13,7 @@ BASE=${1-HEAD}
 		echo "$branch"
 	done
 	git -C Meta/ cat-file blob "${BASE}:whats-cooking.txt" |
-	sed -ne 's/^X-master-at: / --not /p' -e '/^$/q' 
+	sed -ne "s/^X-$MASTER-at: / --not /p" -e '/^$/q'
 ) |
 xargs git shortlog -s -e --no-merges |
 sed -e 's/.*</    </' -e '$q' -e 's/$/,/'

amlook

@@ -4,6 +4,8 @@
 # Meta/amlook id1 id2... (from the command line)
 # Meta/amlook --gc
 
+MASTER=master
+
 find_commit () {
 	in= commits=
 
@@ -43,7 +45,7 @@ find_commit () {
 	fi
 	case " $found " in
 	*' maint '*) in=maint ;;
-	*' master '*) in=master ;;
+	*" $MASTER "*) in=$MASTER ;;
 	*' next '*) in=next ;;
 	esac
 	if test -n "$in"

cook

 #!/usr/bin/perl -w
 # Maintain "what's cooking" messages
 
+my $MASTER = 'master'; # for now
+
 use strict;
 
 my %reverts = ('next' => {
@@ -66,7 +68,7 @@ sub topic_relation {
 	my $fh;
 	open($fh, '-|',
 	     qw(git log --abbrev), "--format=%m %h",
-	     "$one...$two", "^master")
+	     "$one...$two", "^$MASTER")
 	    or die "$!: open log --left-right";
 	my (@left, @right);
 	while (<$fh>) {
@@ -107,7 +109,7 @@ Returns a hash:
 =cut
 
 sub get_commit {
-	my (@base) = qw(master next seen);
+	my (@base) = ($MASTER, 'next', 'seen');
 	my $fh;
 	open($fh, '-|',
 	     qw(git for-each-ref),
@@ -206,8 +208,8 @@ sub get_commit {
 
 	open($fh, '-|',
 	     qw(git log --first-parent --abbrev),
-	     "--format=%ci %h %p :%s", "master..next")
-	    or die "$!: open log master..next";
+	     "--format=%ci %h %p :%s", "$MASTER..next")
+	    or die "$!: open log $MASTER..next";
 	while (<$fh>) {
 		my ($date, $commit, $parent, $tips);
 		unless (($date, $commit, $parent, $tips) =
@@ -220,7 +222,7 @@ sub get_commit {
 			$co->{'merged'} = " (merged to 'next' on $date at $commit)";
 		}
 	}
-	close($fh) or die "$!: close log master..next";
+	close($fh) or die "$!: close log $MASTER..next";
 
 	for my $branch (keys %topic) {
 		my @log = ();
@@ -300,7 +302,7 @@ EOF
 To: git\@vger.kernel.org
 Bcc: lwn\@lwn.net
 Subject: What's cooking in git.git ($mon $year, #$issue; $dow, $date)
-X-master-at: $master_at
+X-$MASTER-at: $master_at
 X-next-at: $next_at
 
 What's cooking in git.git ($mon $year, #$issue; $dow, $date)
@@ -314,7 +316,7 @@ EOF
 
 my $blurb_match = <<'EOF';
 (?:(?i:\s*[a-z]+: .*|\s.*)\n)*?Subject: What's cooking in \S+ \((\w+) (\d+), #(\d+); (\w+), (\d+)\)
-X-master-at: ([0-9a-f]{40})
+X-[a-z]*-at: ([0-9a-f]{40})
 X-next-at: ([0-9a-f]{40})
 
 What's cooking in \S+ \(\1 \2, #\3; \4, \5\)
@@ -476,7 +478,7 @@ sub write_cooking {
 	close($fh);
 }
 
-my $graduated = 'Graduated to "master"';
+my $graduated = "Graduated to '$MASTER'";
 my $new_topics = 'New Topics';
 my $discarded = 'Discarded';
 my $cooking_topics = 'Cooking';
@@ -488,11 +490,11 @@ sub update_issue {
 	open($fh, '-|',
 	     qw(git for-each-ref),
 	     "--format=%(refname:short) %(objectname)",
-	     "refs/heads/master",
+	     "refs/heads/$MASTER",
 	     "refs/heads/next") or die "$!: open for-each-ref";
 	while (<$fh>) {
 		my ($branch, $at) = /^(\S+) (\S+)$/;
-		if ($branch eq 'master') { $master_at = $at; }
+		if ($branch eq $MASTER) { $master_at = $at; }
 		if ($branch eq 'next') { $next_at = $at; }
 	}
 	close($fh) or die "$!: close for-each-ref";
@@ -564,11 +566,11 @@ sub tweak_willdo {
 	my $text = $td->{'text'};
 
 	if (!defined $mergetomaster) {
-		my $master = `git describe master`;
+		my $master = `git describe $MASTER`;
 		if ($master =~ /-rc\d+(-\d+-g[0-9a-f]+)?$/) {
 			$mergetomaster = "Will cook in 'next'.";
 		} else {
-			$mergetomaster = "Will merge to 'master'.";
+			$mergetomaster = "Will merge to '$MASTER'.";
 		}
 	}
 
@@ -580,7 +582,7 @@ sub tweak_willdo {
 	if ($desc =~ /^  \(merged to 'next'/m) {
 		$text =~ s/^ Will merge to 'next'\.$/ $mergetomaster/m;
 		$text =~ s/^ Will merge to and (then )?cook in 'next'\.$/ Will cook in 'next'./m;
-		$text =~ s/^ Will merge to 'next' and (then )?to 'master'\.$/ Will merge to 'master'./m;
+		$text =~ s/^ Will merge to 'next' and (then )?to '$MASTER'\.$/ Will merge to '$MASTER'./m;
 	}
 	$td->{'text'} = $text;
 }
@@ -590,7 +592,7 @@ sub tweak_graduated {
 
 	# Remove the "Will merge" marker from topics that have graduated.
 	for ($td->{'text'}) {
-		s/\n Will merge to 'master'\.(\n|$)//s;
+		s/\n Will merge to '$MASTER'\.(\n|$)//s;
 	}
 }
 
@@ -825,12 +827,13 @@ sub havedone {
 	my ($topic, $to_maint, %to_maint, %merged, $in_desc);
 	if (!@ARGV) {
 		open($fh, '-|',
-		     qw(git rev-list --first-parent -1 master Documentation/RelNotes RelNotes))
+		     qw(git rev-list --first-parent -1), $MASTER,
+		     qw(-- Documentation/RelNotes RelNotes))
 		    or die "$!: open rev-list";
 		my ($rev) = <$fh>;
 		close($fh) or die "$!: close rev-list";
 		chomp $rev;
-		@ARGV = ("$rev..master");
+		@ARGV = ("$rev..$MASTER");
 	}
 	open($fh, '-|',
 	     qw(git log --first-parent --oneline --reverse), @ARGV)