两次提交之间的提交次数 [英] Number of Commits between two Commitishes

问题描述

如何在 git ？

中找到两次提交之间的提交数量另外，是否有一些我可以用GitHub上的任何项目（使用用户界面，而不是API）来做同样的事情吗？

解决方案

你的答案，考虑这个提交图：

  o ----------- 
 / \ 
 ...  -  A  -  o  -  o  -  o  -  B 
 \ / 
o ----- o 
   o 代表一个提交，如 A 和 B （它们只是让我们谈论特定提交的字母）。提交 A 和 B ？
 
 
 <这就是说，在更线性的情况下，只需使用 git rev-list --count A..​​B ，然后决定between之间的含义（包括B和排除A？这就是 git rev-list --count 将如何表现）。在这样的分支案例中，您将获得所有分支的所有提交;例如，添加  - 第一个父母，以便跟随主线。 
 
 
提到我们可能已经注释了标签，这不会影响 git rev-list 的输出，它只计算特定的提交。）
 
 
 
 
 
 
编辑：由于 git rev-list --count A..​​B  includes提交 B （同时省略提交 A ），并且您想排除两个端点，则需要减去一个。在现代shell中，你可以使用shell算法来做到这一点： 
 
 
  count = $（（$（git rev-list --count A ... b） -  1））
  
例如：
 
 
  $ x = $（（$（git rev-list --count HEAD〜3..HEAD） -  1））
 $ echo $ x 
 2 
  
（这个特殊的回购有一个非常线性的图形结构，所以这里没有分支，在小费和小费后之间有两次提交）。但是，请注意，如果 A 和 B 识别相同 commit： 
 
 
  $ x = $（（$（git rev-list --count HEAD..HEAD） -  1）） 
 $ echo $ x 
 -1 
  
所以你可能想要检查第一：
 
 
  count = $（git rev-list --count $ start .. $ end）
 if [ $ count -eq 0];然后
 ...可能的错误：开始和结束是相同的提交... 
 else 
 count = $（（count  -  1））
 fi 
  
 
How can I find the number of commits between two commitishes in git?


Additionally, is there some way that I could do the same with any project on GitHub (using the UI, not the API)?
解决方案
Before I give you an answer, consider this commit graph:
        o -----------
       /             \
... - A - o - o - o - B
       \         /
        o ----- o
Each o represents a commit, as do A and B (they're just letters to let us talk about specific commits).  How many commits are there between commits A and B?

That said, in more linear cases, just use git rev-list --count A..B and then decide what you mean by "between" (does it include B and exclude A? that's how git rev-list --count will behave).  In branchy cases like this, you'll get all the commits down all the branches; add --first-parent, for instance, to follow just the "main line".

(You also mentioned "commitish", suggesting that we might have annotated tags.  That won't affect the output from git rev-list, which only counts specific commits.)



Edit: Since git rev-list --count A..B includes commit B (while omitting commit A), and you want to exclude both end-points, you need to subtract one.  In modern shells you can do this with shell arithmetic:
count=$(($(git rev-list --count A..B) - 1))
For instance:
$ x=$(($(git rev-list --count HEAD~3..HEAD) - 1))
$ echo $x
2
(this particular repo has a very linear graph structure, so there are no branches here and there are two commits "between" the tip and three-behind-the-tip).  Note, however, that this will produce -1 if A and B identify the same commit:
$ x=$(($(git rev-list --count HEAD..HEAD) - 1))
$ echo $x
-1
so you might want to check that first:
count=$(git rev-list --count $start..$end)
if [ $count -eq 0 ]; then
    ... possible error: start and end are the same commit ...
else
    count=$((count - 1))
fi


                        
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