build-source-jar

#!/usr/bin/env bash

function main() {

  local source_dir=$1
  [[ -z ${source_dir} ]] && { echo "specify the directory into which the GitHub Gradle source ZIP was expanded" 1>&2; exit 1; }
  [[ -d ${source_dir} ]] || { echo "not a directory: ${source_dir}" 1>&2; exit 1; }
  [[ -f ${source_dir}/version.txt ]] || { echo "${source_dir} does not seem to be a Gradle source directory, version.txt is missing" 1>&2; exit 1; }
  [[ -d ${source_dir}/subprojects ]] || { echo "${source_dir} does not seem to be a Gradle source directory, subprojects subdirectory is missing" 1>&2; exit 1; }

  local first=true
  local target_file=${source_dir}/gradle-$(cat ${source_dir}/version.txt)-sources.jar
  local skipped_dirs

  for d in $(find ${source_dir}/subprojects -type d -mindepth 1 -maxdepth 1); do
      local parent=$(dirname ${d})
      local dir=$(basename ${d})
      local src_dir=${d}/src/main/java

      if [[ ! -d ${src_dir} ]]; then
          # echo "[warning]: ${dir} does not have a src/main/java subdirectory" 1>&2
          [[ -z ${skipped_dirs} ]] && skipped_dirs=${dir} || skipped_dirs="${skipped_dirs} ${dir}"
      else
          if ${first}; then
              first=false
              jar cf ${target_file} -C ${src_dir} . && echo "${dir} added to ${target_file}" || echo "[warning]: JAR failed for ${src_dir}" 1>&2
          else
              jar uf ${target_file} -C ${src_dir} . && echo "${dir} added to ${target_file}" || echo "[warning]: JAR failed for ${src_dir}" 1>&2
          fi
      fi
  done
  echo "done"
}

main "$@"