complex git commands for managing branches

gistfile1.sh

# To delete all branches on origin that have already been merged into master:

git fetch origin && git remote show origin | grep tracked | grep -v master | awk '{print $1}' | xargs -I '{}' bash -c 'if [ ! "$(git cherry origin/master origin/{})" ]; then git push origin :{}; fi'

# To show the authors of unmerged branches:

git fetch origin; git branch -r | grep origin | xargs -I {} bash -c 'if [[ ! `git cherry HEAD {}` ]]; then echo "{} -- $(git show --format=%an {} | head -n 1)"; fi'


# If you think you lost a commit somehow and it's not stashed and not in a branch, 
# it might be located within a dangling commit. 
# Use the following one-liner to dump all of your dangling commits to a file:

$ git fsck | awk '{print $3}' | xargs -I '{}' git show {} >> blob_contents

# This generates the file 'blob_contents' which contains all git dangling objects from your repository. 
# You can now grep or search with a text editor for the changes that you lost.