Add script to collect debugging information.

scripts/collect-debug-info.sh

@@ -0,0 +1,37 @@
+#!/bin/sh
+
+(
+    set -e
+
+    cd $(dirname $0)/..
+
+    echo "======== ghc-pkg list ========"
+    ghc_ver=$(ghc --version | sed -r 's/.*[[:space:]]([0-9.]+)/\1/')
+    ghc-pkg list -v \
+        --global --user \
+        --package-db .cabal-sandbox/*-ghc-$ghc_ver-packages.conf.d 2>&1
+
+    echo "======== cabal reconfigure ========"
+    cabal clean -v3
+    cabal configure -v3 --enable-tests 2>&1
+    echo "======== END cabal reconfigure ========"
+
+    echo "======== cabal setup/config ========"
+    cat dist/setup-config
+    echo "\n======== END cabal setup/config ========"
+
+    echo "======== cabal build ========"
+    cabal build -v 2>&1
+    echo "======== END cabal build ========"
+
+    echo "======== spec ========"
+    ./dist/build/spec/spec 2>&1
+    echo "======== END spec ========"
+
+    echo "======== doctest ========"
+    ./dist/build/doctest/doctest 2>&1
+    echo "======== END doctest ========"
+) | tee /tmp/ghc-mod-debug-info.log
+echo
+echo
+echo "Debug info written to: /tmp/ghc-mod-debug-info.log"