Parallel git pulls

parallel_pull.sh

#!/usr/bin/env bash

superpull() {
  dir=$1
  error_repos=$2
  cd $dir
  STATUS=`mktemp`
  echo -e "\n************************************\n* Pulling $dir\n************************************" >$STATUS
  git checkout master 1>>$STATUS 2>&1
  if [[ $? != 0 ]]; then
    # we probably have uncommitted changes
    set -x
    echo -e "\t$(tput setaf 1)${dir}$(tput sgr0)" >>"$error_repos" 2>&1
    echo -e "$(tput setaf 1)$(cat $STATUS)$(tput sgr0)"
    set +x
  else
    git pull 1>>$STATUS 2>&1
    if [[ $? != 0 ]]; then
      # pull failure; most likely because origin has been deleted
      echo -e "\t$(tput setaf 1)${dir}$(tput sgr0)" >>"$error_repos" 2>&1
      echo -e "$(tput setaf 1)$(cat $STATUS)$(tput sgr0)"
    else
      # re-colorize pull output
      # match repeating '+' or '-' at EOL, and the dash in '(-)'
      sed -i '' "s/[+]/$(tput setaf 2)&$(tput sgr0)/g" $STATUS
      sed -i '' "s/-*$/$(tput setaf 1)&$(tput sgr0)/g" $STATUS
      sed -i '' "s/(-)/\($(tput setaf 1)-$(tput sgr0)\)/g" $STATUS
      cat "$STATUS"
      git fetch -p
    fi
  fi
  rm -f $STATUS
}

export -f superpull

error_repos=`mktemp`
pushd ~/git/basedir 1>/dev/null 2>&1
find -L $base -type d -depth 1 | xargs -P20 -I{} bash -c "superpull {} $error_repos"
test -s "$error_repos" && echo -e "\n$(tput setaf 1)*** Repos with errors: ***$(tput sgr0)" && cat $error_repos
rm -f $error_repos