ディレクトリを定期的に監視してGitリポジトリに間違ったEmailをコミットしない ref: http://qiita.com/artifactsauce/items/10141d6473bbb0e64cb1

file0.txt

$ git config user.email company-email@example.com

file2.txt

$ watch-git-email.sh /PATH/TO/DIRECTORY/ROOT expect-email@example.com &

file3.txt

$ pkill -KILL -f　watch-git-email.sh

file4.txt

while true; do
    sleep $INTERVAL
    # something to do
done

file5.txt

$ rm -rf .git
$ git init

file6.txt

echo -e "[$(date +"%x %T")] \033[35m[ERROR] $*\033[m" >&2

watch-git-email.sh

#!/usr/bin/env bash

set -eu

: ${DEBUG_MODE:=0}
: ${INTERVAL:=1} #監視間隔, 秒で指定

_.error() {
  echo -e "[$(date +"%x %T")] \033[35m[ERROR] $*\033[m" >&2
}

_.debug() {
  [ "$DEBUG_MODE" -eq 0 ] && return 0
  echo -e "[$(date +"%x %T")] \033[34m[DEBUG] $*\033[m" >&2
}

_.get_stamp() {
  ls -l --full-time $1 | awk '{print $1 $6 $7 $8 $9}' | openssl sha
}

_.run() {
  local target_directory=$1
  local expect_email=$2
  _.debug "Find in $target_directory"
  while read; do
    _.debug "Change directory: $REPLY"
    cd $(dirname $REPLY)
    local actual_email=$(git config user.email)
    if [ "$expect_email" = "$actual_email" ]; then
      continue
    fi
    _.debug "Change git user emal in: $REPLY"
    git config user.email $expect_email
  done <<EOS
$(find $target_directory -type d -name ".git")
EOS
}

_.watch() {
  local target_directory=$1
  local last=$(_.get_stamp $target_directory)
  while true; do
    sleep $INTERVAL
    local current=$(_.get_stamp $target_directory)
    _.debug "Stamp: $current"
    if [ "$last" = "$current" ]; then
        continue
    fi
    _.run $*
    last=$current
  done
}

if [ $# -ne 2 ]; then
  _.error "not enough arguments"
  exit 1
fi

TARGET_DIRECTORY=$1
EXPECT_EMAIL=$2

_.watch $TARGET_DIRECTORY $EXPECT_EMAIL