Remove Unwanted Blobs from Git Commit History

How to remove blobs (and previous commits) of large files that you accidentally commited to git?

Step 1: List the blobs

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• Download git_list_blobs.sh: https://gist.github.com/debanga/6d5ffae603ec437ad80ed3c9c268c57b

1. $ sudo chmod +x git_list_blobs.sh

2. $ ./git_list_blobs.sh

Step 2: Select the blob (and previous commits) you want to remove

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E.g.

Say, the blob list obtained in step 1 looks like this and you want to remove all blobs of DataManager.cpp

...
100644 blob 2e293f4f101d2683722b9d6a748785fdbd423cba   37190    Source/DataManager.cpp
100644 blob 8d6aafe62034647427c5a97a6c13bdea851a7461   36643    Source/DataManager.cpp
100644 blob 05801aeada4bf3f52a71c43d47a6dff390affb51   30308    Source/MainWindow.cpp
100644 blob 6d5ebc0b617489578dbb8ad3e6dd4663c5f830bb   29550    FtReader/ATIDAQ/xmlrole.c
...

Step 2: Remove the blobs

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(https://ownyourbits.com/2017/01/18/completely-remove-a-file-from-a-git-repository-with-git-forget-blob/ Also works)

• Download git-forget-blob: https://gist.github.com/debanga/1c537d38af9d4f48565db2720e3a4ae7

• Also, please refer to https://ownyourbits.com/2017/01/18/completely-remove-a-file-from-a-git-repository-with-git-forget-blob/ for precautions.

1. $ sudo chmod +x git-forget-blob

2. Now, commit and push the repo.

3. $ ./git-forget-blob.sh Source/DataManager.cpp  # <blob_name> from Step 1

4. $ git remote add origin https://uname:pw@bitbucket.org/xxx/xxx.git

5. $ git push --set-upstream origin master # Use --force if needed