Gets coverage data for Flutter packages

coverage.sh

#!/bin/bash
set -e

if [ $# -eq 0 ]
  then
    echo Usage: ./coverage.sh package_1 package_2 ...
    exit 1
fi

for package in $@; do
  echo $package
  pub cache add $package >/dev/null # Download it if it's not already there
  version=`pub cache add $package | awk '{print $4}' | sed -e s/[.]*$//`
  pushd ~/.pub-cache/hosted/pub.dartlang.org/$package-$version/
  grep flutter_test pubspec.yaml || (cp pubspec.yaml pubspec.yaml.bak && cat pubspec.yaml.bak | awk '/dev_dependencies/{print;print "  flutter_test:";print "    sdk: flutter";next}1' > pubspec.yaml)
  (flutter test --coverage && genhtml coverage/lcov.info -o coverage --no-function-coverage -s -p `pwd` | tail -n 1)
  (mv pubspec.yaml.bak pubspec.yaml)
  popd
done