In the mycore subdirectory are some XSLT files that can be helpful to get relevant information of Subversion commit logs. Start there to correct any logs that a not in form r{revision}, rev {revision}, rev. {revision} or revision {revision} required for the next steps.
mkdir -p git-repos/mycore && cd git-repos/mycore
Make sure you use a file system that does NOT ignore cases of filenames (e.g. MacOS default).
MIGBASEDIR=$(cd ../.. && pwd -P)
svn2git https://server.mycore.de/svn/mycore \
--exclude '.*[/]\.project$' --exclude '.*[/]\.classpath$' \
--exclude '.*\.class$' --exclude '.*\.settings($|[/].*)' \
--exclude '(?!.*[/](src|sources)[/]).*[/]target($|[/].*)' \
-m --no-minimize-url --authors "${MIGBASEDIR}/authors.txt"
This monster will initialize a local Git repository in the current directory and uses the author mapping from authors.txt. It also exluded some accidental commit files and directories.
Now we can finally convert SVN revision to GIT SHA checksums:
"${MIGBASEDIR}/filter-branch-date-order" \
--msg-filter "${MIGBASEDIR}/mycore/mycore-msgfilter" \
--tag-name-filter cat -- --all
After the initial convertation we need to update the checksum. Look here further information.
"${MIGBASEDIR}/filter-branch-date-order" -f --prune-empty \
--msg-filter "${MIGBASEDIR}/msgfilter-updatesha" \
--tag-name-filter cat -- --all
Git saves a backup before rewriting everything in refs/original, which we can clean now with:
git for-each-ref --format="%(refname)" refs/original/ | xargs -n 1 git update-ref -d
git gc --aggressive --prune=all
Finally we can put it online
git remote add origin https://github.com/MyCoRe-Org/{repository}.git
git push -u origin --all
git push origin --tags
Some final cleanup like adding a README.md and .gitignore file are left to do.