#!/bin/bash
# Reference: written following http://john.albin.net/git/convert-subversion-to-git

SOFTWARE=$1
if [ -z $SOFTWARE ]; then
  echo "Missing software to convert..."
  exit 1
fi
skiprevisions=
skiprevisionsx="$2"
if [ -n "$skiprevisionsx" ]; then
  for rev in $skiprevisionsx; do
    rev=$(echo $rev | sed 's/r//g')
    rev=$(( $rev + 0 ))
    if [ $rev -gt 0 ]; then
      skiprevisions="$skiprevisions $rev"
    fi
  done
fi

# STEP 2: Import in git
STDLAYOUT=--stdlayout
if [ "$(svn ls http://svn.mandriva.com/svn/soft/$SOFTWARE/trunk 2>/dev/null | wc -l)" == "0" ]; then
  STDLAYOUT=
fi
git svn init http://svn.mandriva.com/svn/soft/$SOFTWARE --no-metadata $STDLAYOUT temp
cd temp
revision=0
if [ -n "$skiprevisions" ]; then
  for rev in $skiprevisions; do
    git svn fetch -A ../authors-transform.txt -r $(( $revision + 1 )):$(( $rev - 1 ))
    revision=$rev
  done
fi
git svn fetch -A ../authors-transform.txt -r $(( $revision + 1 )):HEAD
git reset --hard trunk
cd ..

# STEP 3: Convert svn:ignore properties to .git ignore
cd temp
git svn show-ignore > .gitignore
git add .gitignore
git commit -m 'Convert svn:ignore properties to .gitignore.'
cd ..

# STEP 4: Create a bare repository
git init --bare new-bare.git
cd new-bare.git
git symbolic-ref HEAD refs/heads/trunk
cd ..

cd temp
git remote add bare ../new-bare.git
git config remote.bare.push 'refs/remotes/*:refs/heads/*'
git push bare
cd ..

# STEP 5: Rename trunk to master
cd new-bare.git
git branch -m trunk master
cd ..

# STEP 6: Cleanup branches and tags
cd new-bare.git
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
cd ..

mkdir -p $SOFTWARE.git
rmdir $SOFTWARE.git
mv new-bare.git $SOFTWARE.git


# CLEANUP
mkdir -p $SOFTWARE-origin
rmdir $SOFTWARE-origin
mv  temp $SOFTWARE-origin

exit 0