Add package metadata from hackage

scripts/download-metadata.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+################################################################################
+#                                                                              #
+# Download package metadata for all versions on Hackage                        #
+#                                                                              #
+# Copyright (C)  2015  Daniel Gröber <dxld@darkboxed.org>                      #
+#                                                                              #
+# Copying and distribution of this file, with or without modification,         #
+# are permitted in any medium without royalty provided the copyright           #
+# notice and this notice are preserved.  This file is offered as-is,           #
+# without any warranty.                                                        #
+#                                                                              #
+# Usage: ./download-metadata.sh PACKAGE OUTPUT_DIRECTORY                       #
+#                                                                              #
+################################################################################
+
+PACKAGE=$1
+OUTDIR=$2
+
+versions="$(wget -O - http://hackage.haskell.org/package/"$PACKAGE"/preferred.json | jq '."normal-version"[]' -r)"
+
+mkdir -p "$OUTDIR"
+
+for v in $versions; do
+
+    wget https://hackage.haskell.org/package/"$PACKAGE-$v"/"$PACKAGE".cabal -O "$OUTDIR/${PACKAGE}-${v}.cabal"
+
+done