Question

EDIT:如果你回答我的问题,那么就应该说为什么。

http://progit.org/book/ch9-2.html 作者指出:

吉特通常通过利用你的平流区或指数来创造树木,并从中书写树木物体。

我的问题是,如何知道两个组合式指数条目中的制造来自树木的树木物体?

例如(随机编号为40-char SHA1-我刚刚组成):

$ echo  First change  > one.txt
$ git add one.txt 
$ find .git/objects -type f
.git/objects/1f/755a7fffe4   //first index entry

$ echo  Second change  > one.txt
$ git add one.txt
$ find .git/objects -type f
.git/objects/2d/234asdf2   //second index entry

$ git commit -a -m "Initial commit"
$ git cat-file master^{tree}
100644 blob 2d234asdf2 one.txt  //How did it know not to take 1f755??

Does it just look at the blob timestamps? Also - what happens to the first blob created - no one is referencing it. Does it just get destroyed or forgotten?

Answer 1

$ echo  First change  > one.txt
$ git add one.txt 
$ find .git/objects -type f
.git/objects/1f/755a7fffe4...   # first index entry (repository database)
$ git ls-files --cached --stage --exclude-standard one.txt
100644 1f755a7fffe4... 0       one.txt   # in  the index

$ echo  Second change  > one.txt
$ git add one.txt
$ find .git/objects -type f
.git/objects/2d/234asdf2...     # second index entry (repository database)
$ git ls-files --cached --stage --exclude-standard one.txt
100644 2d234asdf2... 0       one.txt     # in  the index

$ git commit -a -m "Initial commit"
$ git cat-file -p master^{tree}
100644 blob 2d234asdf2... one.txt  # the one from  the index

“git gc”将prune (remove) 松散 d物体.git/objects/1f/755a7fffe4.(仅因安全原因推迟)。

Answer 2

git从文件.git/index中产生承诺树,该指数储存目前的树种和所有相关信息。页: 1

友情链接