Allow stripping unit tests

striptests

@@ -0,0 +1,77 @@
+#!/usr/bin/env bash
+# This file strips all unit tests from ShellCheck, removing
+# the dependency on QuickCheck and Template Haskell and
+# reduces the binary size considerably.
+set -o pipefail
+
+sponge() {
+  data="$(cat)"
+  printf '%s\n' "$data" > "$1"
+}
+
+modify() {
+  if ! "${@:2}" < "$1" | sponge "$1"
+  then
+    {
+      printf 'Failed to modify %s: ' "$1"
+      printf '%q ' "${@:2}"
+      printf '\n'
+    } >&2
+    exit 1
+  fi
+}
+
+detestify() {
+  echo "-- AUTOGENERATED from ShellCheck by striptests. Do not modify."
+  awk '
+    BEGIN {
+      state = 0;
+    }
+
+    /LANGUAGE TemplateHaskell/ { next; }
+    /^import Test\./ { next; }
+
+    /^module/ {
+      sub(/,[^,)]*runTests/, "");
+    }
+
+    # Delete tests
+    /^prop_/ { state = 1; next; }
+
+    # ..and any blank lines following them.
+    state == 1 && /^ / { next; }
+
+    # Template Haskell marker
+    /^return / {
+      exit;
+    }
+
+    { state = 0; print; }
+    '
+}
+
+
+
+if [[ ! -e ShellCheck.cabal ]]
+then
+  echo "Run me from the ShellCheck directory." >&2
+  exit 1
+fi
+
+if [[ -d '.git' ]] && ! git diff --exit-code > /dev/null 2>&1
+then
+  echo "You have local changes! These may be overwritten." >&2
+  exit 2
+fi
+
+modify ShellCheck.cabal sed -e '
+  /QuickCheck/d
+  /^test-suite/{ s/.*//; q; }
+  '
+
+find . -name '.git' -prune -o -type f -name '*.hs' -print |
+  while IFS= read -r file
+  do
+    modify "$file" detestify
+  done
+