您可以使用git merge-base命令查找兩個分支之間的最新公共提交。如果該提交與您的分支頭相同，則分支已完全合并。

需要注意的是git branch -d做這樣的事情已經因為它會拒絕刪除該分支還沒有已經完全合并。

我正在使用以下bash函數，例如： git-is-merged develop feature/new-feature

git-is-merged () {

  merge_destination_branch=$1

  merge_source_branch=$2

  merge_base=$(git merge-base $merge_destination_branch $merge_source_branch)

  merge_source_current_commit=$(git rev-parse $merge_source_branch)

  if [[ $merge_base = $merge_source_current_commit ]]

  then

    echo $merge_source_branch is merged into $merge_destination_branch

    return 0

  else

    echo $merge_source_branch is not merged into $merge_destination_branch

    return 1

  fi

}