gdb-git-migration

Scripts and files for migrating gdb+binutils to git

Instructions

These are just basic instructions, not including stuff like making new directories and cd'ing to the right spot for various operations.

• Start with a copy of the old "devo" CVSROOT

• Grab sourceware's "src" CVSROOT using rsync-command

• Check out the "old gdb releases" git repository

• Convert devo:

  cvs2git --options=options-devo.py make-git-repository

• Hack it:

  hack-devo-branch

• Convert src:

  sh -x RemoveFiles cvs2git --options=options-src.py make-git-repository

• Hack up old-gdb-releases:

  Rewrite-index-old-releases

• Merge:

  run graft-and-filter twice, first old->devo, then devo->src

• Run finalize-new-git-repo on the final repository

• Run upload-git-repository

File details

• RemoveFiles

  A script to remove files from a copy of the "src" tree.

  We mirror src locally, then copy it and remove the bits that don't belong in the resulting repository. Then we run cvs2git on the result.

• Rewrite-index-old-releases

  Pedro made a git repository of the old gdb releases:

  https://github.com/palves/gdb-old-releases
  

  First, based on some archaeology, it seems we want to ignore old releases after gdb 3.5 -- anything newer than that is in the "devo" copy we have.

  However, the files in these old revisions in this repository appear in "./"; but for the conversion we want them to appear in "gdb/".

  This script can be used with filter-branch to rewrite this repository:

    git filter-branch --tree-filter Rewrite-index-old-releases -- --all
  

• Total-merged-user-map

  A list of all the user ids in the repository.

  I started with the gdb and binutils user maps from Jim Meyering's cvs->git mirror. I removed the dups somewhat arbitrarily.

  Then I ran:

    git log --all --format=%aN |sort -u  > ../USERS
  

  on an early conversion of the "devo" repository to get all the older users. I used merge-authors.py to merge this with the Meyering map.

  Next I got logins from the "src" cvs->git conversion and looked those up in sourceware's /etc/passwd.

  Finally I asked on the list for updates.

• rsync-command

  rsync the "src" repository