hello #tag_abc

gen_patch.sh

## helper function to create patch
##
## Usage:
###
### download:
### $ curl https://gist.githubusercontent.com/shawn111/64ee0125acab30c619e129c52de94082/raw/273d7f91a3adb75603800d260cb0b62ca42f2262 -o xx.sh
###
### copy the function into .bashrc
###
### Run below command in your git project dir.
###
### $ SUBJECT="hello world" gen_patch <branch-abc>
###
### output: ./HelloWorld/
###           |--- 0000-cover-letter.patch
###           |--- 0001-xxx.patch
###           |--- 0002-xxx2.patch
###
###
### cover-letter.patch
###
### From e8a8de1bacec7cc59bbbed7c9df60b2bca2c1fd7 Mon Sep 17 00:00:00 2001
### From: Shawn Wang <shawn.wang@easystack.cn>
### Date: Thu, 18 Jan 2018 16:36:51 +0800
### Subject: [PATCH, yak 0/1] ${SUBJECT}
###
### ------
### repo: ${REPO}
### branch: ${BRANCH}
### ------
###
### ...
###
### --------------------------------------------------------
### .gitconfig
### [sendemail]
###        smtpEncryption = tls
###        smtpServer = smtp.qiye.163.com
###        smtpUser = shawn.wang@easystack.cn
###        smtpServerPort = 25
###        smtppass = xxxx
###        confirm = auto
###        cc = system-engineering@easystack.cn
####        to = hello@easystack.cn
###        coverletter = auto

function gen_patch {
  export BRANCH=${1:-master}
  export REPO=${REPO:-$(git config --get remote.origin.url)}
  SUBJECT=${2:-$SUBJECT}
  PATCH_DIR=$(python -c "print '${SUBJECT}'.title().replace(' ', '')")
  COUNT=$(git rev-list ${BRANCH}..HEAD --count)
  REPO_NAME=${REPO_NAME:-$(basename `git rev-parse --show-toplevel`)}

  if [ "${SUBJECT}" = "" -o  "$#" -lt 1 ]; then
    echo " $ $FUNCNAME \"branch\" \"SUBJECT\""
    return 1
  fi

  if [ $COUNT -lt 1 ]; then
    echo "commit count: $COUNT"
    return 1
  elif [ $COUNT -eq 1 ]; then
    FILE=$(git format-patch --subject-prefix="PATCH, ${REPO_NAME}" -o $PATCH_DIR ${BRANCH}..HEAD)
  else
    git format-patch --subject-prefix="PATCH, ${REPO_NAME}" --cover-letter -o $PATCH_DIR ${BRANCH}..HEAD
    FILE=$PATCH_DIR/0000-cover-letter.patch
  fi

  if [ ! -f $FILE ];
  then
    echo "can't find file: $FILE"
    return 1
  fi
  sed -i -e '0,/re/ s/\*\*\*\sSUBJECT\sHERE\s\*\*\*/\${SUBJECT}/' $FILE
  sed -i -e '0,/re/ s/\*\*\*\sBLURB\sHERE\s\*\*\*/==============\nrepo: \${REPO}\nbranch: \${BRANCH}\n/' $FILE
  sed -i -e '0,/re/ s/^\-\-\-$/---\nrepo: \${REPO}\nbranch: \${BRANCH}\n/' $FILE

  cat $FILE | envsubst > $FILE.tmp
  mv ${FILE}.tmp $FILE
  echo "git send-email $PATCH_DIR --to <reviewer>"
}