我如何通过bash脚本选择下一个分支

Question

I've written a script to list all local branches in my repository.

#!/bin/bash
clear

branches=()
menuposition=0
eval "$(git for-each-ref --shell --format='branches+=(%(refname))' refs/heads/)"
for branch in "${branches[@]}"; do
    menuposition=$((menuposition+1))
    echo "$menuposition) $branch"
done

The output is ...

1) master
2) foo
3) bar

I can use read command to get user input. But, ... How can I, then, checkout the branch choosed by user?

Answer 1

#!/bin/bash
clear
options=()

#for bash version 4 or higher use mapfile.
#Fallback to while loop if mapfile not found
mapfile -t options < <(git for-each-ref \
--format='%(refname:short)' refs/heads/) &>/dev/null \
|| while read line; do options+=( "$line" ); done \
< <(git for-each-ref --format='%(refname:short)' refs/heads/)

options+=('Exit')

select opt in "${options[@]}"
do
    if [[ "$opt" ]] && [[ "$opt" == 'Exit' ]]; then
        echo "Bye Bye"
        exit 0
    elif [[ "$opt" ]]; then
        git checkout "$opt"
    else
        echo "Wrong Input. Please enter the correct input"
    fi
done