#!/bin/bash

# Script to convert MAUS branches to a git repository

# A. Dobbs, September 2015

# ---------------------------------------------------

BZR_REPO=/vols/fets2/adobbs/MAUS/maus/

GIT_REPO=${BZR_repo}/git-repo

clean-up-old-files () {

  # Function to remove old files that conversion resurrects

  cd ${GIT-REPO}

  git rm -r components

  git rm -r core

  git rm -r src/reduce/ReducePyAcceleratorParameters/

  git rm src/legacy/Config/BeamlineGeometry.cc

  git rm src/legacy/Config/BeamlineGeometry.hh

  git rm src/legacy/Config/BeamlineParameters.cc

  git rm src/legacy/Config/BeamlineParameters.hh

  git rm src/legacy/Config/RFBackgroundParameters.cc

  git rm src/legacy/Config/RFBackgroundParameters.hh

  git rm src/legacy/Interface/AnalysisPlaneBank.cc

  git rm src/legacy/Interface/AnalysisPlaneBank.hh

  git rm src/legacy/Interface/CppErrorHandler.cc

  git rm src/legacy/Interface/CppErrorHandler.hh

  git rm src/legacy/Interface/JsonWrapper.cc

  git rm src/legacy/Interface/JsonWrapper.hh

  git rm src/legacy/Simulation/MAUSGeant4Manager.cc

  git rm src/legacy/Simulation/MAUSGeant4Manager.hh

  git rm src/legacy/Simulation/MAUSPrimaryGeneratorAction.cc

  git rm src/legacy/Simulation/MAUSPrimaryGeneratorAction.hh

  git rm src/legacy/Simulation/MAUSSteppingAction.cc

  git rm src/legacy/Simulation/MAUSSteppingAction.hh

  git rm src/legacy/Simulation/MAUSTrackingAction.cc

  git rm src/legacy/Simulation/MAUSTrackingAction.hh

  git rm src/legacy/Simulation/MICEEventAction.cc

  git rm src/legacy/Simulation/MICEEventAction.hh

  git rm src/legacy/Simulation/MICEPrimaryGeneratorAction.hh

  git rm src/legacy/Simulation/MICESteppingAction.cc

  git rm src/legacy/Simulation/MICESteppingAction.hh

  git rm src/legacy/Simulation/VirtualPlanes.cc

  git rm src/legacy/Simulation/VirtualPlanes.hh

  git rm tests/integration/00build_essential.bash

  git rm tests/integration/01build_rest.bash

  git rm tests/integration/02scons_configure_all.bash

  git rm tests/integration/03build_commoncpp.bash

  git rm tests/integration/04build_all.bash

  git rm tests/integration/05unit.bash

}

configure-empty-folders () {

  # Function to setup empty folders with a place holder file so git will accept them

  cd ${GIT-REPO}

  mkdir build

  echo 'Git cannot handle empty folders, hence a place holder file.' > PlaceHolder.txt

  mv PlaceHolder.txt build/

  git add build/PlaceHolder.txt

  mkdir tmp

  cp build/PlaceHolder.txt tmp/

  git add tmp/PlaceHolder.txt

  mkdir tests/integration/plots/

  cp build/PlaceHolder.txt tests/integration/plots/

  git add tests/integration/plots/PlaceHolder.txt

  mkdir tests/py_unit/test_geometry/testCases/testGDMLtoMAUSModule/

  cp build/PlaceHolder.txt tests/py_unit/test_geometry/testCases/testGDMLtoMAUSModule/

  git add tests/py_unit/test_geometry/testCases/testGDMLtoMAUSModule/PlaceHolder.txt

}

configure-merge-branch () {

  # Function to merge changes in master branch to merge branch

  cd ${GIT-REPO}

  git checkout merge

  git merge master

  git checkout master

}

create-git-repo () {

  # Function to create a git repository and import the MAUS branches

  # Start from inside a MAUS shared repository containing the merge and release branches:

  cd ${BZR_REPO}

  mkdir git-repo

  cd git-repo

  git init

}

import-maus-branches () {

  # Function to export maus branches and the import them to the git repo

  cd ${GIT-REPO}

  git checkout master

  bzr fast-export --export-marks=../marks.bzr ../release | git fast-import --export-marks=../marks.git

  bzr fast-export --marks=../marks.bzr --git-branch=merge ../merge | git fast-import --import-marks=../marks.git --export-marks=../marks.git

  git reset --hard

}

purge-large-data () {

  # Function to remove gdc1901.001 from all revisions, as it is too large for git hub

  cd ${GIT-REPO}

  git filter-branch --prune-empty -d /vols/fets2/adobbs/scratch --index-filter "git rm --cached -f --ignore-unmatch src/input/InputCppDAQData/gdc1901.001" --tag-name-filter cat -- --all

}

push-to-remote () {

  # Function to push the branches to the mice-software repository on github

  cd ${GIT-REPO}

  git checkout master

  git remote add origin git@github.com:mice-software/maus.git

  git push -u origin master

  git checkout merge

  git push -u origin merge

}

# Main programme

# --------------

# echo 'Creating a git repository to store the MAUS branches'

create-git-repo

# echo 'Exporting bzr branches and import to git'

import-maus-branches

echo 'Configuring git repo to accept empty maus folders'

configure-empty-folders

echo 'Removing files and folders from previous MAUS revisions'

clean-up-old-files

# echo 'Purging files too large for github (>100MB)'

purge-large-data

# echo 'Building and testing MAUS'

./install_build_test.bash -j 8

# echo 'Commit the changes to the master'

git commit -m 'Conversion from Bzr to Git'

# echo 'Configuring merge branch'

configure-merge-branch

# echo 'Pushing branches to github'

# push-to-remote