[LLVMdev] A script for updating all the nested git clients

[David Blaikie]

There's functionality in the make build to update (at least one layer
of) nested svn working copies of LLVM, but nothing in cmake and
nothing for git in either. I use the following script & after updating
it to handle arbitrary nesting (with the advent of the
clang-tools-extra repository) & generalize the discovery (had a
hardcoded list & after fixing up the Make build after some changes I
made I used something similar for my script) I figured I'd send it out
in case other people would like to use it (or just tell me why/how I'm
doing it wrong, if they think I am):

#!/bin/sh

if ! git remote -v 2> /dev/null | grep "http://llvm.org/git" > /dev/null; then
  echo "Not an llvm git repo"
  exit 1
fi

while ! git remote -v 2> /dev/null | grep
"http://llvm.org/git/llvm.git" > /dev/null; do
  if ! git remote -v 2> /dev/null > /dev/null; then
    echo "Could not find the root of the llvm git repository"
    exit 1
  fi
  cd `git rev-parse --show-toplevel`/../
done

cd `git rev-parse --show-toplevel` > /dev/null

function fetchAndRebase {
  if [ -d $1 ]; then
    pushd $1 > /dev/null
    if git status > /dev/null; then
      git stash | grep "No local changes to save" > /dev/null
      STASHED=$?
      git fetch > /dev/null
      git svn rebase -l > /dev/null
      if [ $STASHED -ne 0 ]; then git stash pop > /dev/null; fi
      for dir in `git status --ignored | grep /$ | sed -e "s/^#//"`; do
        fetchAndRebase $dir
      done
    fi
    popd > /dev/null
  fi
}

fetchAndRebase `git rev-parse --show-toplevel`