Convert svn repository to Git repository

convert_svn_to_git.sh

#! /bin/sh
#
# Convert svn repository to Git repository
# Author: Nicolas Brousse <[email protected]>
# Date: 2013-10-02 17:28:01 UTC
#
# Thanks to: http://www.mabishu.com/blog/2011/01/13/migrate-subversion-repository-to-git-without-loosing-data/
#
set -e

CURRENT_DIR=$(pwd)

function pause(){
   read -p "$*"
}
function error_exit {
    cd $CURRENT_DIR
    set +e
    echo ""
    echo "########################################"
    echo "########### GENERATION FAILED ##########"
    echo "########################################"
    rm -rf ./svn_repository >/dev/null 2>&1
    rm -rf "${SVN_PROJECT##/*/}" >/dev/null 2>&1
    rm -rf ./git_repository >/dev/null 2>&1
    exit 1
}
trap "error_exit 'Received signal SIGHUP'" SIGHUP
trap "error_exit 'Received signal SIGINT'" SIGINT
trap "error_exit 'Received signal SIGTERM'" SIGTERM
shopt -s expand_aliases
alias die='error_exit'

#
# Run
#
Run()
{
  if [ -z "$1" ] || [ -z "$2" ]; then
    echo ""
    echo "Usage: \$bash ${0##*/} svn_host my_repository"
    echo ""
    exit 1
  fi

  # Init vars
  SVN_PROJECT="/${2}"
  SVN_HOST="${1}${SVN_PROJECT}"

  # Checkout of svn repository
  # To get the authors name of revisions
  echo ""
  echo "## Checkout svn repository"
  echo " -- Start checkout '$SVN_PROJECT' repository"
  svn checkout "$SVN_HOST" svn_repository --quiet
  if [ $? -eq 0 ]; then
    echo " -- Checkout '$SVN_PROJECT' repository is terminate succefuly"
  else
    echo " ---- Failed to checkout $SVN_PROJECT repository"
  fi

  # Generate the authors transition file
  echo ""
  echo "## Generate authors transition file"
  cd svn_repository
  svn log -q | awk -F '|' '/^r/ {sub("^ ", "", $2); sub(" $", "", $2); print $2" = "$2" <"$2">"}' | sort -u > authors-transform.txt

  # Edit this file
  echo " -- Enter you password to edit the file"
  echo " -- Example:"
  echo " --     username = Name on Git <email>"
  echo " --     nicolas = Nicolas BROUSSE <[email protected]>"
  pause " -- Press enter to continue..."

  # Lauch editor
  sudo vi authors-transform.txt
  if [ $? -eq 0 ]; then
    echo " -- File updated"
  else
    echo "Script failed"
  fi

  echo ""
  echo "## Generate Git repository"
  cd ../
  echo " -- Start Generate Git repository"
  git svn clone "$SVN_HOST" -A ./svn_repository/authors-transform.txt --no-metadata --quiet ./git_repository
  if [ $? -eq 0 ]; then
    echo " -- Git repository clone succefuly"
    cd ./git_repository > /dev/null 2>&1

    echo " -- Create .keep file into empty directories"
    find ./ -type d -depth -empty -exec touch {}/.keep \;

    echo " -- Convert ignore"
    git svn show-ignore -i trunk > .gitignore
    git add .gitignore
    git commit -m 'Convert svn:ignore properties to .gitignore.' > /dev/null 2>&1

    echo " -- Clean up "
    git for-each-ref --format='%(refname)' refs/heads/tags |
    cut -d / -f 4 |
    while read ref
    do
      git tag "$ref" "refs/heads/tags/$ref";
      git branch -D "tags/$ref";
    done
    git gc
    git fsck

    echo " -- Clean SVN sections form Git"
    git config --remove-section svn
    git config --remove-section svn-remote.svn
    rm -rf .git/svn .git/{logs/,}refs/remotes/svn/ >/dev/null 2>&1

    cd $CURRENT_DIR
    echo ""
    echo "## Clean folders and files"
    rm -rf ./svn_repository
    mv ./git_repository "./${SVN_PROJECT##/*/}"

    echo ""
    echo "########################################"
    echo "#### GENERATION TERMINATE SUCCEFULY ####"
    echo "########################################"
  else
    echo ""
    echo "########################################"
    echo "########### GENERATION FAILED ##########"
    echo "########################################"
  fi
}

#
# Run a phase based on the selector
#
Run $1 $2

convert_svn_to_git_stdlayout.sh

#! /bin/sh
#
# Convert standard svn repository to Git repository
# Author: Nicolas Brousse <[email protected]>
# Date: 2013-10-02 17:28:01 UTC
#
# Thanks to: http://www.mabishu.com/blog/2011/01/13/migrate-subversion-repository-to-git-without-loosing-data/
#
set -e

CURRENT_DIR=$(pwd)

function pause(){
   read -p "$*"
}
function error_exit {
    cd $CURRENT_DIR
    set +e
    echo ""
    echo "########################################"
    echo "########### GENERATION FAILED ##########"
    echo "########################################"
    rm -rf ./svn_repository >/dev/null 2>&1
    rm -rf "${SVN_PROJECT##/*/}" >/dev/null 2>&1
    rm -rf ./git_repository >/dev/null 2>&1
    exit 1
}
trap "error_exit 'Received signal SIGHUP'" SIGHUP
trap "error_exit 'Received signal SIGINT'" SIGINT
trap "error_exit 'Received signal SIGTERM'" SIGTERM
shopt -s expand_aliases
alias die='error_exit'

#
# Run
#
Run()
{
  if [ -z "$1" ] || [ -z "$2" ]; then
    echo ""
    echo "Usage: \$bash ${0##*/} svn_host my_repository"
    echo ""
    exit 1
  fi

  # Init vars
  SVN_PROJECT="/${2}"
  SVN_HOST="${1}${SVN_PROJECT}"

  # Checkout of svn repository
  # To get the authors name of revisions
  echo ""
  echo "## Checkout svn repository"
  echo " -- Start checkout '$SVN_PROJECT' repository"
  svn checkout "$SVN_HOST" svn_repository --quiet
  if [ $? -eq 0 ]; then
    echo " -- Checkout '$SVN_PROJECT' repository is terminate succefuly"
  else
    echo " ---- Failed to checkout $SVN_PROJECT repository"
  fi

  # Generate the authors transition file
  echo ""
  echo "## Generate authors transition file"
  cd svn_repository
  svn log -q | awk -F '|' '/^r/ {sub("^ ", "", $2); sub(" $", "", $2); print $2" = "$2" <"$2">"}' | sort -u > authors-transform.txt

  # Edit this file
  echo " -- Enter you password to edit the file"
  echo " -- Example:"
  echo " --     username = Name on Git <email>"
  echo " --     nicolas = Nicolas BROUSSE <[email protected]>"
  pause " -- Press enter to continue..."

  # Lauch editor
  sudo vi authors-transform.txt
  if [ $? -eq 0 ]; then
    echo " -- File updated"
  else
    echo "Script failed"
  fi

  echo ""
  echo "## Generate Git repository"
  cd ../
  echo " -- Start Generate Git repository"
  git svn clone "$SVN_HOST" -A ./svn_repository/authors-transform.txt --no-metadata --stdlayout --quiet ./git_repository
  if [ $? -eq 0 ]; then
    echo " -- Git repository clone succefuly"
    cd ./git_repository > /dev/null 2>&1

    echo " -- Create .keep file into empty directories"
    find ./ -type d -depth -empty -exec touch {}/.keep \;

    echo " -- Convert ignore"
    git svn show-ignore -i trunk > .gitignore
    git add .gitignore
    git commit -m 'Convert svn:ignore properties to .gitignore.' > /dev/null 2>&1

    echo " -- Clean up "
    git for-each-ref --format='%(refname)' refs/heads/tags |
    cut -d / -f 4 |
    while read ref
    do
      git tag "$ref" "refs/heads/tags/$ref";
      git branch -D "tags/$ref";
    done
    git gc
    git fsck

    echo " -- Clean SVN sections form Git"
    git config --remove-section svn
    git config --remove-section svn-remote.svn
    rm -rf .git/svn .git/{logs/,}refs/remotes/svn/ >/dev/null 2>&1

    cd $CURRENT_DIR
    echo ""
    echo "## Clean folders and files"
    rm -rf ./svn_repository
    mv ./git_repository "./${SVN_PROJECT##/*/}"

    echo ""
    echo "########################################"
    echo "#### GENERATION TERMINATE SUCCEFULY ####"
    echo "########################################"
  else
    echo ""
    echo "########################################"
    echo "########### GENERATION FAILED ##########"
    echo "########################################"
  fi
}

#
# Run a phase based on the selector
#
Run $1 $2