验证是否存在提交 [英] Validate if commit exists

问题描述

解析输出的方法很多，但我需要返回布尔值的最优方法（用于用于bash脚本）。

例如

  sha = $ 1 
如果[-z`git magic --validate $ sha`];然后
 echoInvalid commit sha：$ sha
 exit 1 
 fi 
  

解决方案

rev-list | grep 方法正常工作;因为git必须打印出 grep 的所有SHA1来查看，但这并不是什么大不了的事。

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

$ $ p $ if [$（git merge-base $ commit $ branch）=$ commit ]。然后
...
fi


无论您如何操作，请注意 rev-list 和 merge-base 将会打印出SHA1，所以如果你正在测试的提交包含以分支或标签命名，您需要使用 git rev-parse 将其转换为SHA1。

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

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

e.g.

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

解决方案

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.

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

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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