svn to git conversion steps

svn2git.sh

#git conversion:
# init: see 'subgit help configure'
subgit configure --layout auto -T trunk/Project http:/baseurl... FooSubGit
# edit FooSubGit/subgit/config and authors.txt
# in particular take care of
#[svn]
#	url = http:/.../trunk/...
#	trunk = :refs/heads/master
#	# Note: if repos have been moved around you can define the old locations as branches and subgit will connect the dots!
#
#	# exclude binaries etc.
#	# also see https://issues.tmatesoft.com/issue/SGT-1037
#	excludePath = vendor
#	excludePath = *.msi
#	excludePath = *.obj
#	excludePath = bin
#	excludePath = lib
#	excludePath = debug
#	excludePath = release
#
#	httpSpooling = true
#
#[translate]
#	eols    = false
#	ignores = false
#
#[daemon]
#	idleTimeout = 0

subgit install FooSubGit

# switch to git bash
git clone FooSubGit FooGit
cd FooGit

# fixup tags if necessary
git for-each-ref refs/tags --shell --format='echo git tag -f %(refname:short)_ %(refname:short)~1' | sh

# create local branches
for remote in `git branch -r`; do git branch --track $remote; done

BRANCHES=$(find .git/refs/heads -type f | sed 's|.git/refs/heads/||')

# add refs to svn revisions to commit msgs:
git fetch origin refs/svn/map:refs/notes/commits
# NOTE: can't use --all parameter cause of the notes ref
# NOTE: this HAS to be done first as any other transform loses the connection to these notes
time git filter-branch -f --msg-filter 'cat && echo -e "\n" && git notes show $GIT_COMMIT' --tag-name-filter cat --prune-empty -- $BRANCHES
rm -r .git/refs/notes

# now other filters following pattern:
# time git filter-branch -d workdir -f      <ADD YOUR FILTER SET>     --tag-name-filter cat --prune-empty -- --all
# remove folders:  
#  --index-filter 'git rm -q -r --cached --ignore-unmatch -- directory'

# fix line endings
# use RAM disk since this is slow
# strangely without the git add -u it does strange things and adds newer files to first commit
FASTDISKWORKDIR=$TEMP/workdir
time git filter-branch -d "$FASTDISKWORKDIR" -f --tree-filter "echo '* text=auto' > .gitattributes && rm $FASTDISKWORKDIR/index && git reset && git add -u" --tag-name-filter cat --prune-empty -- --all

# cleanup
rm -rf .git/refs/original/
git reflog expire --expire=now --all
git gc --prune=now

# if the .git folder is still large try
# https://stubbisms.wordpress.com/2009/07/10/git-script-to-show-largest-pack-objects-and-trim-your-waist-line/