Add DUB version scraping scripts

tools/determine-dub-version-of-dmd-release.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+set -e
+if [ -z "$1" ]; then
+	echo "No DMD version provided."
+	echo "Usage:  ${0} <version>"
+	exit 1
+fi
+
+echo "DMD version ${1}"
+
+# Create temporary directory.
+tmpDir=$(mktemp -d)
+
+# Download + unpack.
+curl -Ssf \
+	-o "${tmpDir}/dmd.tar.xz" \
+	"https://download.dlang.org/releases/2.x/${1}/dmd.${1}.linux.tar.xz"
+tar -C $tmpDir \
+	-xf "${tmpDir}/dmd.tar.xz"
+
+# Query DUB for its version.
+${tmpDir}/dmd2/linux/bin64/dub --version
+
+# Cleanup.
+rm -rf $tmpDir

tools/determine-dub-version-of-ldc-release.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+set -e
+if [ -z "$1" ]; then
+	echo "No LDC version provided."
+	echo "Usage:  ${0} <version>"
+	exit 1
+fi
+
+echo "v${1} - LDC"
+
+curl -LSsf \
+	"https://github.com/ldc-developers/ldc/raw/v${1}/packaging/dub_version"
+echo ' - DUB'