chore: Add script to create the coverge report (#32)

Author: oforero

scripts/coverage.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+open_browser() {
+  if command -v open >/dev/null; then
+    open "$1"
+  elif command -v xdg-open >/dev/null; then
+    xdg-open "$1"
+  elif command -v start >/dev/null; then
+    start "$1"
+  else
+    echo "Open the report manually: $1"
+  fi
+}
+
+cabal clean
+cabal test all --enable-coverage
+
+HPCDIRS=$(find . -type f -name '*.mix' -exec dirname {} \; | xargs dirname | sort -u | sed 's/^/--hpcdir=/')
+TIX=$(find . -name '*.tix' | head -n1)
+
+hpc markup \
+  $HPCDIRS \
+    --exclude=dataframe:Dataframe \
+  $TIX \
+  --destdir=coverage-html \
+  --reset
+
+open_browser ./coverage-html/hpc_index.html