为什么git浅克隆可以有比<depth>更多的提交?

时间:2016-07-31 11:30:50

标签: git git-clone

git clone --depth <depth> <url> <repo>; git -C <repo> rev-list --count --all!= <depth>

  

git clone --depth <depth>:创建一个历史记录被截断为<depth> 提交的克隆。意为--single-branch

例如:url = https://github.com/vhf/free-programming-books.git,深度= 10,然后commit_count = 15

git version 2.9.0

1 个答案:

答案 0 :(得分:5)

存储库的浅版本包括在跟随所有可能的父级而不是仅跟随第一个时,距分支头指定距离内的所有提交。因此,对于具有合并的非线性历史记录,提交计数将不等于深度。

$ git clone --depth 10 https://github.com/vhf/free-programming-books.git
Cloning into 'free-programming-books'...
remote: Counting objects: 85, done.
remote: Compressing objects: 100% (63/63), done.
remote: Total 85 (delta 31), reused 46 (delta 22), pack-reused 0
Unpacking objects: 100% (85/85), done.
Checking connectivity... done.

$ git -C free-programming-books/ rev-list --count HEAD
15

$ git -C free-programming-books/ log --graph --oneline --decorate
* b9ffc8e (HEAD -> master, origin/master, origin/HEAD) Adding pt_BR C book used by ...
* 824c1d3 Replaced Google Python style guide dead-link with new one (#1987)
* 3c32612 Added Laravel: Code Smart online book (#1986)
* eabce2c Fixed typo: Structure and Interpretation (#1985)
* aab83e5 Added IRPF90 gitbook to Misc section (#1984)
* 6f72509 Added a bash tutorial in free-courses-en.md (#1983)
*   9b95b09 Merge branch 'pr/1980'
|\  
| * 2811cd3 Fix blank lines
| * bbe9bd6 Adds 2 golang podcasts (and fixes missing #ggulp)
| * fdeabc6 (grafted) Fix ordering
*   da317ad Merge branch 'pr/1976'
|\  
| * 20b940a Fix ordering
| * 9a6ee0b (grafted) Add openHPI to list of MOOCs
* 43294d1 Update link Rust by Example #1970 (#1995)
* d758a93 (grafted) Fix a broken link to 'Practical PostgreSQL' (#1994)

此截断历史记录中的伪根提交为d758a939a6ee0bfdeabc6所有这些都是头部提交的第9代祖先。

原始回答(在提供MVCE之前)

<url>不以file://开头时,本地克隆可能就是这种情况。然后git输出相应的警告:

warning: --depth is ignored in local clones; use file:// instead.

对于本地克隆,git只是创建源存储库中对象的硬链接(除非指定了--no-hardlinks开关,但后者仍然不会使本地克隆尊重--depth选项)。通过硬链接进行克隆可以节省磁盘空间,与复制所有对象相比,速度非常快。由于--depth选项的目的是减少数据传输,因此对本地克隆没有多大意义,因此会被忽略。