[ghc] pkg-deps.sh: check for graphviz

[Jens Petersen]

commit 96dece0e90a1692441e047f03682c2a5be6ca563
Author: Jens Petersen <petersen at redhat.com>
Date:   Fri Sep 24 12:35:22 2010 +1000

    pkg-deps.sh: check for graphviz

 pkg-deps.sh |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/pkg-deps.sh b/pkg-deps.sh
index 801f0c0..8df293f 100755
--- a/pkg-deps.sh
+++ b/pkg-deps.sh
@@ -41,6 +41,7 @@ cp -p pkgs.dot pkgs.dot.orig
 GHC_PKGS="array base-4 base-3 bin-package-db bytestring Cabal containers directory dph extensible-exceptions filepath ffi ghc-binary ghc-prim haskell98 hpc integer-gmp old-locale old-time pretty process random rts syb template-haskell time unix Win32"
 for i in $GHC_PKGS; do sed -i -e /$i/d pkgs.dot; done
 
+which tred >/dev/null
 cat pkgs.dot | tred | dot -Nfontsize=8 -Tsvg >pkgs.svg
 
 if [ -n "$DISPLAY" ]; then