Git removes large files that have been committed

Preface: When submitting and pushing local changes to the warehouse, a large file was submitted by mistake, resulting in an error report that the push file is too large, so it is necessary to remove the large file that has been committed before pushing

If you know the file or folder path to delete, you can start from step 4

1. Perform gc operation on the warehouse

 $ git gc

2. Query large files

git verify-pack -v .git/objects/pack/pack-*.idx | sort -k 3 -g | tail -5

 Note that this is queried from the .git folder, so it needs to be executed in the root directory of the warehouse

The displayed result is a large file, and the first 6 ids are the file submission id 

3. Get the file name corresponding to the id

git rev-list --objects --all | grep id名称

如：git rev-list --objects --all | grep 78b35d

 After the id is the full path name of the file

4. Delete the file (if you know the file path, you can directly execute the following command)

git filter-branch --force --prune-empty --index-filter 'git rm -rf --cached --ignore-unmatch 文件名' --tag-name-filter cat -- --all

like:

git filter-branch --force --prune-empty --index-filter 'git rm -rf --cached --ignore-unmatch CustomPhysics2DIntProject2022.3/Build/01 - 副本/UnityPlayer.dll' --tag-name-filter cat -- --all

If you want to delete a directory, you can directly fill in the directory, such as:

git filter-branch --force --prune-empty --index-filter 'git rm -rf --cached --ignore-unmatch CustomPhysics2DIntProject2022.3/Build' --tag-name-filter cat -- --all

If an exception occurs: Cannot rewrite branches: You have unstaged changes.

Excuting an order:

git stash

re-delete after

 5. Delete the pointer to the old commit

rm -rf .git/refs/original/

6. Delete log

rm -rf .git/logs/

7. Give up the possibility of all unassociated object recovery

git reflog expire --expire=now --all

8. Clean up the trash and repackage

git repack -A -d    //重新打包

git gc --aggressive --prune=now //清理垃圾，重新打包

9. Forcibly push the remote

git push --force
git push --force --all

10. Multiple branch cleanup

git checkout branchName    //切换分支,多个分支需要分别清理