Git internal objects

2022-02-16

示例项目

https://jihulab.com/show/git_objects_demo

该项目共包含一个 commit, 包含的文件结构如下:

.
├── doc
│   └── index.md
├── readme.md
└── wiki
    ├── help.md
    └── info.md

git objects 目录下, 共 8 个文件:

find .git/objects -type f

.git/objects/69/15089af93052dc6f67fd7245037230a6b1894b
.git/objects/67/89c99cbe4a25ecc9e69eb1e66df819ddfab2e5
.git/objects/d0/38440f5c27d52fed6b6c5eb7d180f1645ab724
.git/objects/f2/0b9ed4f8ba4e99df6a2491bbed85e8daf526d5
.git/objects/20/61bac5e1a292b380f98072ef5ffbc2fc3eefa9
.git/objects/11/ef4924f8f1e21e6d7412040973f5e868559ac7
.git/objects/16/796efecb4599c92244ac8bafb217e20009008e
.git/objects/53/33c1763419c89486091d80b6ba430d30b321a0

Hash	Type	Content
6915089af93052dc6f67fd7245037230a6b1894b	commit	tree 6789c99cbe4a25ecc9e69eb1e66df819ddfab2e5 author Baodong <wwwicbd@gmail.com> 1645015448 +0800 committer Baodong <wwwicbd@gmail.com> 1645015448 +0800 Init
6789c99cbe4a25ecc9e69eb1e66df819ddfab2e5	tree	040000 tree d038440f5c27d52fed6b6c5eb7d180f1645ab724 doc 100644 blob 5333c1763419c89486091d80b6ba430d30b321a0 readme.md 040000 tree 11ef4924f8f1e21e6d7412040973f5e868559ac7 wiki
d038440f5c27d52fed6b6c5eb7d180f1645ab724	tree	100644 blob 2061bac5e1a292b380f98072ef5ffbc2fc3eefa9 index.md
f20b9ed4f8ba4e99df6a2491bbed85e8daf526d5	blob	# Info
2061bac5e1a292b380f98072ef5ffbc2fc3eefa9	blob	# Index
11ef4924f8f1e21e6d7412040973f5e868559ac7	tree	100644 blob 16796efecb4599c92244ac8bafb217e20009008e help.md 100644 blob f20b9ed4f8ba4e99df6a2491bbed85e8daf526d5 info.md
16796efecb4599c92244ac8bafb217e20009008e	blob	# Help
5333c1763419c89486091d80b6ba430d30b321a0	blob	# Readme ```text . ├── doc │ └── index.md ├── readme.md └── wiki ├── help.md └── info.md ```

上面 8 个 Hash 中,

有 1 个 commit 类型的, 对应 repo 中唯一的 commit;

有 3 个 tree 类型的, 对应 repo 中 3 个目录: 根目录 / doc 目录 / wiki 目录.

有 4 个 blob 类型的, 对应 repo 中 4 个 md 文件.

文件修改

在上面的 repo 的基础上, 对 readme 新加一行, 并提交到了新的 repo:

https://jihulab.com/show/git_objects_demo_2

此时, objects 新增了三个 Hash:

.git/objects/92/60de33334266d9ab1e8c8333ccc0898865748f
.git/objects/b3/c84f0cfa3b38c0bd9f8c1713536dc144077199
.git/objects/cb/e1f2b84138ece7363749e9a31193a62104262d

Hash	Type	Content
9260de33334266d9ab1e8c8333ccc0898865748f	commit	tree cbe1f2b84138ece7363749e9a31193a62104262d parent 6915089af93052dc6f67fd7245037230a6b1894b author Baodong <wwwicbd@gmail.com> 1645018274 +0800 committer Baodong <wwwicbd@gmail.com> 1645018274 +0800 Add blog link
b3c84f0cfa3b38c0bd9f8c1713536dc144077199	blob	# Readme [https://icbd.github.io/git-internal-objects/](https://icbd.github.io/git-internal-objects/) ```text . ├── doc │ └── index.md ├── readme.md └── wiki ├── help.md └── info.md ```
cbe1f2b84138ece7363749e9a31193a62104262d	tree	040000 tree d038440f5c27d52fed6b6c5eb7d180f1645ab724 doc 100644 blob b3c84f0cfa3b38c0bd9f8c1713536dc144077199 readme.md 040000 tree 11ef4924f8f1e21e6d7412040973f5e868559ac7 wiki

Hash

Type

Content

9260de33334266d9ab1e8c8333ccc0898865748f

commit

tree cbe1f2b84138ece7363749e9a31193a62104262d
parent 6915089af93052dc6f67fd7245037230a6b1894b
author Baodong <wwwicbd@gmail.com> 1645018274 +0800
committer Baodong <wwwicbd@gmail.com> 1645018274 +0800

Add blog link

b3c84f0cfa3b38c0bd9f8c1713536dc144077199

blob

# Readme

[https://icbd.github.io/git-internal-objects/](https://icbd.github.io/git-internal-objects/)

```text
.
├── doc
│   └── index.md
├── readme.md
└── wiki
    ├── help.md
    └── info.md
```

cbe1f2b84138ece7363749e9a31193a62104262d

tree

040000 tree d038440f5c27d52fed6b6c5eb7d180f1645ab724	doc
100644 blob b3c84f0cfa3b38c0bd9f8c1713536dc144077199	readme.md
040000 tree 11ef4924f8f1e21e6d7412040973f5e868559ac7	wiki

该 repo 共包含 11 个 git objects, 相比于之前新增了 3 个,

有 1 个 commit 类型的, 对应新增的 commit;

有 1 个 tree 类型的, 对应被修改的 readme.md 所在的目录 (目录下有文件发送变化, 目录本身的 tree 也发送变化);

有 1 个 blob 类型的, 对应被修改的 readme.md 文件 (虽然只修改了其中一行, blob 还是保存了完整的文件内容).