From bc3363beb767a82e3bdde2d038e7b678bd35f193 Mon Sep 17 00:00:00 2001
From: Joey Hess <joey@kodama.kitenet.net>
Date: Sun, 27 Jul 2008 00:02:04 -0400
Subject: ikiwiki-update-wikilist: Add -r switch to remove. Default behavior is
 now always to add.

---
 debian/changelog                 |  2 ++
 doc/ikiwiki-update-wikilist.mdwn | 10 ++++++----
 ikiwiki-update-wikilist          | 36 +++++++++++++++++++++++++-----------
 3 files changed, 33 insertions(+), 15 deletions(-)

diff --git a/debian/changelog b/debian/changelog
index 08be87fbe..982c55796 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -7,6 +7,8 @@ ikiwiki (2.60) UNRELEASED; urgency=low
   * The way wrappers are defined in the setup file has changed. Old setup
     files will continue to work, for now.
   * Version control backends promoted to first-class plugins.
+  * ikiwiki-update-wikilist: Add -r switch to remove. Default behavior is now
+    always to add.
 
  -- Joey Hess <joeyh@debian.org>  Mon, 21 Jul 2008 11:35:46 -0400
 
diff --git a/doc/ikiwiki-update-wikilist.mdwn b/doc/ikiwiki-update-wikilist.mdwn
index 4e87f92e6..e5ea72e36 100644
--- a/doc/ikiwiki-update-wikilist.mdwn
+++ b/doc/ikiwiki-update-wikilist.mdwn
@@ -4,14 +4,16 @@ ikiwiki-update-wikilist - add or remove user from /etc/ikiwiki/wikilist
 
 # SYNOPSIS
 
-ikiwiki-update-wikilist
+ikiwiki-update-wikilist [-r]
 
 # DESCRIPTION
 
-`ikiwiki-update-wikilist` is designed to be made suid root, but not installed
+`ikiwiki-update-wikilist` is designed to be made suid root, but is not installed
 suid by default. If made suid, it allows users to add or remove their names
-from the `/etc/ikiwiki/wikilist` file. If a user's name is not in the file,
-it will be added; if the name is already present, it will be removed.
+from the `/etc/ikiwiki/wikilist` file. 
+
+By default, the user's name will be added.
+The `-r` switch causes the user's name to be removed.
 
 If your name is in `/etc/ikiwiki/wikilist`, the [[ikiwiki-mass-rebuild]](8)
 command will look for a ~/.ikiwiki/wikilist file, and rebuild the wikis listed
diff --git a/ikiwiki-update-wikilist b/ikiwiki-update-wikilist
index 0f3f0bcc6..0b52543cd 100755
--- a/ikiwiki-update-wikilist
+++ b/ikiwiki-update-wikilist
@@ -5,6 +5,8 @@ use warnings;
 use strict;
 use English;
 
+my $remove=(@ARGV && $ARGV[0] eq '-r');
+
 my $username=getpwuid($REAL_USER_ID);
 if (! defined $username || ! length $username) {
 	die "unable to determine user name for UID $REAL_USER_ID\n";
@@ -15,7 +17,8 @@ if (! -e $wikilist) {
 	die "$wikilist does not exist\n";
 }
 
-my $removed=0;
+my $changed=0;
+my $seen=0;
 my @lines;
 open (my $list, "<$wikilist") || die "read $wikilist: $!";
 while (<$list>) {
@@ -23,7 +26,10 @@ while (<$list>) {
 	if (/^\s*([^\s]+)\s*$/) {
 		my $user=$1;
 		if ($user eq $username) {
-			$removed=1;		
+			if (! $remove) {
+				$seen=1;
+				push @lines, $_;
+			}
 		}
 		else {
 			push @lines, $_;
@@ -33,16 +39,24 @@ while (<$list>) {
 		push @lines, $_;
 	}
 }
-close $list || die "error reading $list: $!";
-open ($list, ">$wikilist") || die "write $wikilist: $!";
-foreach (@lines) {
-	print $list "$_\n";
+if (! $seen && ! $remove) {
+	push @lines, $username;
+	$changed=1;
 }
-if ($removed) {
-	print "removed user $username from $wikilist\n";
+if ($changed) {
+	close $list || die "ikiwiki-update-wikilist: error reading $list: $!\n";
+	open ($list, ">$wikilist") || die "ikiwiki-update-wikilist: error writing $wikilist: $!\n";
+	foreach (@lines) {
+		print $list "$_\n";
+	}
+	if ($remove) {
+		print "ikiwiki-update-wikilist: removed user $username from $wikilist\n";
+	}
+	else {
+		print "ikiwiki-update-wikilist: added user $username to $wikilist\n";
+	}
+	close $list || die "ikiwiki-update-wikilist: error writing $wikilist: $!\n";
 }
 else {
-	print $list "$username\n";
-	print "added user $username to $wikilist\n";
+	print "ikiwiki-update-wikilist: no changes need to be made\n";
 }
-close $list || die "error writing $list: $!";
-- 
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