GitPython通过sha获取树和blob对象 [英] GitPython get tree and blob object by sha

问题描述

我在一个裸仓库中使用GitPython，我试图通过sha获得特定的git对象。如果我直接使用git，我会这样做

  git ls-tree sha_of_tree 
 git show sha_of_blob 
  

由于我使用的是GitPython，我想要获取特定的树，我执行以下操作。

  repo = Repo（path_to_my_repo）
 repo.tree（b466a6098a0287ac568ef0ad783ae2c35d86362b）
  

然后将它取回

 < git。树b466a6098a0287ac568ef0ad783ae2c35d86362b> 
  

现在我有了一个树对象，但是我无法访问其路径，名称，Blob等属性

  repo.tree（b466a6098a0287ac568ef0ad783ae2c35d86362b）。path 
 
 Traceback（最近一次调用最后一次）：
 
在< module>中的文件< stdin>，第1行
文件c：\Python27\lib\site-packages\gitdb\util.py，行238，在__getattr__ 
 self._set_cache_（attr）
文件 c：\Python27\lib\site-packages\git\objects\tree.py，第147行，在_set_cache_ 
 super（Tree，self）._ set_cache_（attr）
文件c：\Python27\lib\site-packages\git\objects\base.py，行157，在_set_cache_ 
 raise AttributeError（path and mode attributes must have been set during during ％s对象创建％type（self）.__ name__）
 AttributeError：必须在创建Tree对象期间设置路径和模式属性
  

但是，如果输入以下内容，它可以工作

  repo.tree（）。​​trees [0 ] .path 
  

我的问题的另一部分是如何使用GitPython获取blob对象。我注意到只有对象树具有属性blob，所以为了通过sha获得blob，我必须首先知道它属于哪个树，找到这个blob然后调用data_stream方法。
我可以做
$ b $ $ p $ repo.git.execute（git show blob_sha）
code>

但我首先想知道这是执行此操作的唯一方法。

解决方案

试试这个：



  def read_file_from_branch（self，repo，branch，path，charset ='ascii'）：
'''
返回分支中文件的内容，而不检出
分支
'''
如果在repo.heads中分支：
 blob =（repo.heads [branch] .commit.tree / path）
如果blob：
数据= blob.data_stream.read（）
如果字符集：
返回data.decode（字符集）
返回数据
返回无
  




I'm using GitPython with a bare repository and I'm trying to get specific git object by its sha. If I used git directly, I would just do this

git ls-tree sha_of_tree
git show sha_of_blob

Since I'm using GitPython and I want to get specific tree, I do the following.

repo = Repo("path_to_my_repo")
repo.tree("b466a6098a0287ac568ef0ad783ae2c35d86362b")

And get this back

<git.Tree "b466a6098a0287ac568ef0ad783ae2c35d86362b">

Now I have a tree object but I cannot access its atributes like path,name,blobs, etc

repo.tree("b466a6098a0287ac568ef0ad783ae2c35d86362b").path

Traceback (most recent call last):

File "<stdin>", line 1, in <module>
File "c:\Python27\lib\site-packages\gitdb\util.py", line 238, in __getattr__
self._set_cache_(attr)
File "c:\Python27\lib\site-packages\git\objects\tree.py", line 147, in _set_cache_
super(Tree, self)._set_cache_(attr)
File "c:\Python27\lib\site-packages\git\objects\base.py", line 157, in _set_cache_
raise AttributeError( "path and mode attributes must have been set during %s object creation" % type(self).__name__ )
AttributeError: path and mode attributes must have been set during Tree object creation

But if type the following it works

repo.tree().trees[0].path

The other part of my question is how to get blob object with GitPython. I noticed that only object tree has attribute blobs so in order to get blob by sha, I have to first know which tree it belongs to, find this blob and then call data_stream method. I could just do

repo.git.execute("git show blob_sha")

but I would like to know first that this is the only way to do this.

解决方案

Try this:

   def read_file_from_branch(self, repo, branch, path, charset='ascii'):
            '''
            return the contents of a file in a branch, without checking out the
            branch
            '''
            if branch in repo.heads:
                blob = (repo.heads[branch].commit.tree / path)
                if blob:
                    data = blob.data_stream.read()
                    if charset:
                        return data.decode(charset)
                    return data
            return None

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