验证提交是否存在 [英] Validate if commit exists

问题描述

如何验证当前分支中是否存在给定sha的提交?

How to validate whether the commit with given sha exists in current branch?

解析输出的方法有很多，但我需要返回布尔值的最佳方法(用于 bash 脚本).

There are many ways to parse outputs, but I need optimal way which returns boolean (for usage in bash script).

例如

sha=$1
if [ -z `git magic --validate $sha` ]; then
  echo "Invalid commit sha: $sha"
  exit 1
fi

推荐答案

rev-list |grep 方法工作正常；有一点点开销，因为 git 必须打印出所有的 SHA1 以供 grep 看到，但这并不是什么大问题.

The rev-list | grep method works fine; there's the tiniest bit of overhead because git has to print out all the SHA1s for grep to see, but it's not really a big deal.

如果你愿意，你也可以用 git merge-base 来做 - 如果目标提交和分支的合并基础是目标提交，分支包含目标提交:

You can also do it with git merge-base if you like - if the merge base of the target commit and the branch is the target commit, the branch contains the target commit:

if [ "$(git merge-base $commit $branch)" = "$commit" ]; then
    ...
fi

无论您采用哪种方式，请注意 rev-list 和 merge-base 将打印出 SHA1，因此如果您正在测试包含的提交由分支或标签命名，您需要先使用 git rev-parse 将其转换为 SHA1.

Either way you do it, note that rev-list and merge-base are going to be printing out SHA1s, so if the commit you're testing for inclusion is named by a branch or tag, you'll want to use git rev-parse to turn it into an SHA1 first.

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