README.md

   1 git-cheat-sheet
   2 ===============
   3
   4 How to do stuff with git
   5
   6
   7 Splitting a repo
   8 ----------------
   9
  10 ### Remove history of all but select files in cloned repo
  11 ```sh
  12 $ cp -Rp old new
  13 $ cd new
  14 $ git clean -dfx
  15 $ git gc --aggressive --prune=now
  16 $ git remote rm origin
  17 $ git filter-branch \
  18     --prune-empty \
  19     --index-filter '
  20         git ls-tree -r --name-only HEAD \
  21         | grep -v file_i_want_to_keep_1 \
  22         | grep -v file_i_want_to_keep_.. \
  23         | grep -v file_i_want_to_keep_n \
  24         | xargs git rm --cached -r --ignore-unmatch
  25     ' \
  26     HEAD
  27 $ git gc --aggressive --prune=now
  28 ```
  29
  30 ### Remove history of previously-removed (not in current tree) files
  31 ```sh
  32 $ git log --pretty=format: --name-status \
  33     | awk '$0 != "" {print $2}' \
  34     | sort -u > /tmp/tree.old
  35 $ git ls-tree -r --name-only HEAD > /tmp/tree.new
  36 $ git filter-branch \
  37     --prune-empty \
  38     --index-filter '
  39         grep -Fvxf /tmp/tree.new /tmp/tree.old \
  40         | xargs git rm --cached -r --ignore-unmatch
  41     ' \
  42     HEAD
  43 ```
  44
  45
  46 Inserting a new root commit
  47 ---------------------------
  48 ```sh
  49 git checkout --orphan $TEMP_BRANCH
  50 git rm -rf .
  51 git commit --allow-empty -m $INIT_COMMIT_MSG
  52 git rebase --onto $TEMP_BRANCH --root $MAIN_BRANCH
  53 git branch -d $TEMP_BRANCH
  54 ```