Add a brief help.

diff --git a/imapsync b/imapsync
index d24723d058f97a222e42df59610f584b478c064e..fec37f085c7d0eb466be2cebf6a67f87b3b4646c 100755 (executable)
--- a/imapsync
+++ b/imapsync
@@ -39,10 +39,23 @@ delete @ENV{qw/IFS CDPATH ENV BASH_ENV/};
 my %CONFIG;
 sub usage(;$) {
     my $rv = shift // 0;
-    print STDERR "TODO $NAME usage\n";
+    print STDERR "$NAME [OPTIONS] [--] [MAILBOX [..]]\n";
+    if ($rv) {
+        print STDERR "Try '$NAME --help' or consult the manpage for more information.\n";
+    }
+    else {
+        print STDERR "Synchronize the given MAILBOXes between two QRESYNC-capable IMAP4rev1 servers.\n"
+            ."Options:\n"
+            ."    --config=FILE    Specify an alternate configuration file\n"
+            ."    -1, --oneshot    Exit as soon as all mailboxes are synchronized\n"
+            ."    --repair         List the database anomalies and try to repair them\n"
+            ."    -q, --quiet      Try to be quiet\n"
+            ."    --debug          Turn on debug mode\n"
+            ."Consult the manpage for more information.\n";
+    }
     exit $rv;
 }
-usage(1) unless GetOptions(\%CONFIG, qw/debug help|h config=s quiet|q oneshot|1 repair/);
+usage(1) unless GetOptions(\%CONFIG, qw/config=s quiet|q oneshot|1 repair debug help|h/);
 usage(0) if $CONFIG{help};