Git的原理简介和常用命令

每执行下 git add、git commit 命令都会在 .git/objects 文件夹中新建一个二进制文件

COMMIT_EDITMSG 文件在初始化 git 项目时并不存在，在第一次 git commit 后才生成。

Git 内部有一个对象数据库，向数据库中存数据的命令是 git hash-object；取数据的命令是 git cat-file

.git 最初的目录结构和主要文件内容

|-- .git
    |-- config
    |-- description
    |-- FETCH_HEAD
    |-- HEAD
    |-- hooks
    |   |-- applypatch-msg.sample
    |   |-- commit-msg.sample
    |   |-- fsmonitor-watchman.sample
    |   |-- post-update.sample
    |   |-- pre-applypatch.sample
    |   |-- pre-commit.sample
    |   |-- pre-merge-commit.sample
    |   |-- pre-push.sample
    |   |-- pre-rebase.sample
    |   |-- pre-receive.sample
    |   |-- prepare-commit-msg.sample
    |   |-- push-to-checkout.sample
    |   |-- update.sample
    |-- info
    |   |-- exclude
    |-- objects
    |   |-- info
    |   |-- pack
    |-- refs
        |-- heads
        |-- tags

config

[core]
	repositoryformatversion = 0
	filemode = false
	bare = false
	logallrefupdates = true
	symlinks = false
	ignorecase = true

description

Unnamed repository; edit this file 'description' to name the repository.

HEAD

ref: refs/heads/master