clean all maven projects

clean_all_maven_projects.sh

#!/usr/bin/env bash

echo "finding all poms"
readarray -t poms < <(find "${1:-${MVN_CLEAN_ROOT}}" -name "pom.xml" || true)
echo "found ${#poms[@]} poms."

echo "deduping poms"
projects_to_clean=()
for pom in "${poms[@]}"
do
  project_path=$"${pom/\/pom.xml/}"
  already_covered='false'
  for index in "${!projects_to_clean[@]}"
  do
    project_to_clean="${projects_to_clean[${index}]}"
    if [[ "${project_path}" =~ ${project_to_clean}.* ]]
    then
      already_covered='true'
      # echo "${project_path} is already covered, skipping."
      break
    elif [[ "${project_to_clean}" =~ ${project_path}.* ]]
    then
      # echo "${project_path} superceeds ${project_to_clean}, removing ${project_to_clean}"
      unset 'projects_to_clean[${index}]'
    fi
  done
  if [[ "${already_covered}" == 'false' ]]
  then
    projects_to_clean+=( "${project_path}" )
    # echo "${project_path} is new, adding."
  fi
done

echo "${#projects_to_clean[@]} projects to clean. Starting."

printf "%s\n" "${projects_to_clean[@]}" | xargs -I {} -n1 -P4 mvn --file={}/pom.xml clean