Add a way to cleanly handle terminfo.db file used by devel/ncurses

This database contains compiled terminfo entries and is merged from
a large part which comes with ncurses themselves and compiled
.terminfo files installed by other ports (currently only rxvt-unicode
and jfbterm)

- Now the database is always kept up to date, regardless of port
  installation order (both ncurses installed before .terminfo files
  and the other way around work as expected)
- All affected ports now support clean deinstallation and do not
  produce stage-qa errors
- Affected ports are simplified, as they now only need to define
  USES=terminfo
- rxvt-unicode no longer pulls in ncurses: the dependency is not
  really needed for anything beside updating it's own database
- The patch contains Q/A test to check whether a port needs, or
  needs not USES=terminfo

Approved by:	portmgr (mat, bapt)
Differential Revision:	D3747

1 files changed, 22 insertions, 0 deletions

diff --git a/Keywords/terminfo.ucl b/Keywords/terminfo.ucl
new file mode 100644
index 000000000000..870a03296268
--- /dev/null
+++ b/Keywords/terminfo.ucl
@@ -0,0 +1,22 @@
+# $FreeBSD$
+#
+
+actions: []
+post-install: <<EOD
+  terminfodir=%D/share/misc
+  terminfodb=${terminfodir}/terminfo.db
+  if [ -e ${terminfodb}.default ] && which -s tic; then
+    cp ${terminfodb}.default ${terminfodb}
+    find -s ${terminfodir} -name "*.terminfo" -exec tic {} \;
+  fi
+EOD
+post-deinstall: <<EOD
+  terminfodir=%D/share/misc
+  terminfodb=${terminfodir}/terminfo.db
+  if [ -e ${terminfodb}.default ] && which -s tic; then
+    cp ${terminfodb}.default ${terminfodb}
+    find -s ${terminfodir} -name "*.terminfo" -exec tic {} \;
+  else
+    rm -f ${terminfodb}
+  fi
+EOD