git branch checkout/delete via fzf

co

#!/bin/sh

set -eo errexit

sep='	'

# NOTE: $1 should not intersect with real branch names
case "$1" in
    --LIST)
        refname='%(refname:short)'
        sha='%(color:yellow)%(objectname:short)%(color:reset)'
        date='%(color:green)(%(creatordate:iso8601))%(color:reset)'
        author='%(color:bold blue)<%(authorname)>%(color:reset)'
        cur='%(if)%(HEAD)%(then)%(color:bold cyan) <- HEAD%(color:reset)%(end)'
        upstream='%(if)%(upstream)%(then)%(color:bold red)%(upstream:short)%(color:reset), %(end)'
        branch='%(color:bold green)%(refname:short)%(color:reset)'

        git for-each-ref refs/heads --sort=-committerdate --color=always \
            --format="$refname$sep$sha - $date $author %(subject) ($upstream$branch)$cur"
        exit $?
        ;;
    *)
        if [ "$(git rev-parse --verify "$1" 2>/dev/null)" ]; then
            exec git checkout "$1"
        fi
        fzf -1 --ansi --no-preview --reverse --query="$1" \
            --delimiter="$sep" --with-nth=2 \
            --height '~50%' \
            --header 'Select a branch; press Alt-Backspace to delete a branch' \
            --bind "start:reload:$0 --LIST" \
            --bind "enter:become(git switch '{1}')" \
            --bind "alt-backspace:execute-silent(git branch -D '{1}')+reload($0 --LIST)"
        ;;
esac