文章作者：Tyan
博客：noahsnail.com  |  CSDN  |  简书

1. Git仓库的创建

• 在当前目录新建一个Git仓库

# 命令形式：git init

$ cd TestGit
$ git init
Initialized empty Git repository in /Users/***/TeskGit/.git/

• 在指定目录下新建一个Git仓库

# 命令形式：git init [Directory Name]

$ git init TestGit
Initialized empty Git repository in /Users/***/TeskGit/.git/

• 从Github等地方克隆一个仓库到当前目录（可能需要输入密码，以ssh方式克隆），如果不指定分支，则默认从Refactor仓库的Default branch（一般为master）克隆

# 命令形式：git clone [url] -b [branch name]

$ git clone ssh://git@github.com/**/Refacor -b master
Cloning into ‘Refacor‘...
Saving password to keychain failed
Identity added: /Users/**/.ssh/id_rsa_github ((null))
remote: Counting objects: 3, done.
remote: Total 3 (delta 0), reused 3 (delta 0), pack-reused 0
Receiving objects: 100% (3/3), done.
Checking connectivity... done.

2. 关联远程仓库

• 将本地仓库与远程仓库关联，首先要初始化一个本地仓库，url可以在github的仓库获得，origin为远程仓库在本地的别名，即origin=git@github.com:*/Refacor.git

# 命令形式：git remote add [remote repository aliase] [url]

$ git remote add origin git@github.com:***/Refacor.git

• 查看本地仓库关联的远程仓库

# 命令形式：git remote [-v]

$ git remote
origin
$ git remote -v
origin  git@github.com:***/Refacor.git (fetch)
origin  git@github.com:***/Refacor.git (push)

• 删除本地仓库关联的远程仓库

# 命令形式：git remote rm [remote repository aliase]

$ git remote rm origin
$ git remote

• 关联远程仓库后，从远程仓库取内容，并根据远端仓库在本地创建了两个分支，master和develop

# 命令形式：git fetch

$ git fetch
remote: Counting objects: 3, done.
remote: Total 3 (delta 0), reused 3 (delta 0), pack-reused 0
Unpacking objects: 100% (3/3), done.
From github.com:***/Refacor
* [new branch]      develop    -> origin/develop
* [new branch]      master     -> origin/master

• 显示远程仓库的信息

# 命令形式：git remote show [remote repository name]

$ git remote show origin
* remote origin
  Fetch URL: git@github.com:***/Refacor.git
  Push  URL: git@github.com:***/Refacor.git
  HEAD branch: master
  Remote branches:
    develop tracked
    master  tracked
  Local branches configured for ‘git pull‘:
    develop merges with remote develop
    master  merges with remote master
  Local refs configured for ‘git push‘:
    develop pushes to develop (up to date)
    master  pushes to master  (local out of date)

3. Git分支的创建、切换、删除、关联

• 创建本地分支并切换到新创建的分支，-b代表新创建一个分支，-B用在本地分支已经存在的情况下，强行创建一个新分支并将原来的分支覆盖，checkout主要是分支切换，创建分支使用branch命令

# 命令形式：git checkout [-b or -B] [local branch name]

$ git checkout -b a
Switched to a new branch ‘a‘
$ git checkout -b a
fatal: A branch named ‘a‘ already exists.
$ git checkout -B a
Switched to and reset branch ‘a‘

• 切换本地分支

# 命令形式：git checkout [local branch name]

$ git checkout develop
Switched to branch ‘develop‘

• 查看当前所在的本地分支，创建本地分支，local branch name不存在时是查看当前所在的本地分支，存在时是创建一个新的本地分支

# 命令形式：git branch [local branch name]

$ git branch
* a
  develop
  master

$ git branch b

• 查看远程分支和所有分支，-r是查看远程分支，-a是查看所有分支

# 命令形式：git branch [-r] [-a]

$ git branch -r
  origin/develop
  origin/master
$ git branch -a
  develop
* master
  remotes/origin/develop
  remotes/origin/master

• 删除本地分支

# 命令形式：git branch -d [local branch name]

$ git branch -d test
Deleted branch test (was 0b05e43).

• 创建本地分支并与远端分支关联

# 命令形式：git checkout -b [local branch name] origin/[remote branch name]

$ git checkout -b develop origin/develop
Branch develop set up to track remote branch develop from origin.
Switched to a new branch ‘develop‘

$ git checkout -b master origin/master
Branch master set up to track remote branch master from origin.
Switched to a new branch ‘master‘

• 关联远程分支

# 命令形式：git branch --set-upstream-to [remote repository name/remote branch]

$ git branch --set-upstream-to origin/develop
Branch develop set up to track remote branch develop from origin.

• 删除远程分支，git push origin –delete [remote branch name]是直接删除掉远程仓库的分支，git branch -dr [remote/branch]是删除本地分支与远程分支的关联关系。

# 命令形式：git push origin --delete [remote branch name] or git branch -dr [remote/branch]

$ git push origin --delete develop
To git@github.com:***/Refacor.git
 - [deleted]         develop

$ git branch -dr origin/develop
Deleted remote-tracking branch origin/develop (was d6813fd).

注：本地可以有多个分支，远程也可以有多个分支，本地多个分支可以关联远程多个分支，但是，本地分支最好与远程分支同名，以免出现问题。

4.从远程仓库取内容，向远程仓库提交内容

向远程仓库提交内容之前，要理解三个概念：本地文件，缓冲区，本地仓库。平常修改的文件内容都是本地文件，在往远程仓库提交之前先要提交到缓冲区，再从缓冲区提交到本地仓库，然后本地仓库才能往远程仓库提交。本地的内容分为三大部分，它们是相互独立的，理解了这四个概念就明白为什么要执行git add，git commit，git push命令了。

• 从远程仓库取内容，git fetch默认情况下是当前的本地分支从其关联的远程分支上取内容，可以使用git branch先查看当前的本地分支，使用git status（包括本地分支和远程分支都能看到）查看其关联的远程分支。从下面的例子中可以看出本地分支为develop，远程分支也为develop

# 命令形式：git fetch，git merge，git pull

$ git branch
* develop
  master
$ git status
On branch develop
Your branch is up-to-date with ‘origin/develop‘.
nothing to commit, working directory clean
$ git fetch

• 将从远程仓库取下的内容与本地仓库的内容进行合并，合并之前必须将本地的修改提交到本地仓库。

# 命令形式：git merge

# 正常情况下
$ git merege
Already up-to-date.

# 没有提交修改到本地仓库的情况下
$ git merge
Updating d6813fd..2444abc
error: Your local changes to the following files would be overwritten by merge:
    README.md
Please, commit your changes or stash them before you can merge.
Aborting

# 本地仓库与取下的远程仓库内容有冲突的情况下
$ git merge
Auto-merging README.md
CONFLICT (content): Merge conflict in README.md
Automatic merge failed; fix conflicts and then commit the result.

• 解决冲突，冲突是使用git时常常会碰到的情况，冲突解决主要是在将本地仓库内容与远程仓库取下的内容merge后，进入merge后的文件进行修改，将冲突解决，然后重新add，commit，push即可。

冲突内容：

# Refacor
<<<<<<< HEAD
branch develop
=======
branch
>>>>>>> refs/remotes/origin/develop

修改后的内容：

# Refacor
branch develop

处理过程：

$ vim README.md 
$ git add .
$ git commit -m "feat: handle conflict"
[develop d4c01a6] feat: handle conflict
$ git push
Counting objects: 4, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (4/4), 416 bytes | 0 bytes/s, done.
Total 4 (delta 1), reused 0 (delta 0)
remote: Resolving deltas: 100% (1/1), done.
To git@github.com:***/Refacor.git
   2444abc..d4c01a6  develop -> develop

• 直接从远程仓库取内容并合并

# 命令形式：git pull
$ git pull
remote: Counting objects: 3, done.
remote: Total 3 (delta 0), reused 0 (delta 0), pack-reused 0
Unpacking objects: 100% (3/3), done.
From github.com:***/Refacor
   d4c01a6..afa74f2  develop    -> origin/develop
Updating d4c01a6..afa74f2
Fast-forward
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

备注：git pull = git fetch + git merge，git pull功能很强大，能自动合并冲突，合并后需要手动解决冲突，最好不要直接使用git pull，因为许多细节都看不到。

• 将本地文件修改提交到缓冲区，git add filename是将单个文件提交到缓冲区，可以提交多个文件，中间用空格分开，也可提交目录，git add . 是将所有修改内容提交到缓冲区

# 命令形式：git add [filename1] [filename2] or [directoryname] or [.]
$ git add README.md
$ git add README.md a.txt
$ git add . 

• 将缓冲区内容提交到本地仓库

# 命令形式：git commit [file1] [file2] -m [comment]
$ git commit -m "feat: edit README.md"
[develop d6813fd] feat: edit README.md
 1 file changed, 1 insertion(+), 1 deletion(-)

$ git commit README.md a.txt -m "feat: commit test"

• 将本地仓库内容提交到远程仓库，默认情况下，如果你的本地分支与远程分支同名且关联，git push就可以，但如果不是你需要加上更多的东西。我本地仓库有master和develop分支，远程仓库有master和develop分支，我本地仓库的develop分支与远程仓库的master分支关联。所以直接git push是不可以的。最好不要这么干，我只是测试一下。下面的另一个例子是我将本地仓库的develop分支与远程仓库的develop分支关联并提交修改到远程仓库。

# 命令形式：git push [remote repository name] [remote branch]
git push
fatal: The upstream branch of your current branch does not match
the name of your current branch.  To push to the upstream branch
on the remote, use

    git push origin HEAD:master

To push to the branch of the same name on the remote, use

    git push origin develop

$ git push origin HEAD:master
Counting objects: 3, done.
Writing objects: 100% (3/3), 296 bytes | 0 bytes/s, done.
Total 3 (delta 0), reused 0 (delta 0)
To git@github.com:***/Refacor.git
   f7ea1a0..d6813fd  HEAD -> master

$ git branch --set-upstream-to origin/develop
Branch develop set up to track remote branch develop from origin.
$ git status
On branch develop
Your branch is ahead of ‘origin/develop‘ by 1 commit.
  (use "git push" to publish your local commits)
nothing to commit, working directory clean
$ git fetch
$ git merge
Already up-to-date.
$ git push
Total 0 (delta 0), reused 0 (delta 0)
To git@github.com:***/Refacor.git
   f7ea1a0..d6813fd  develop -> develop

5. Git配置

• 查看Git的所有配置信息

# 命令形式：git config --list
$ git config --list

• 查看特定的配置信息

# 命令形式：git config --get [variable]

$ git config --get user.name
test

$ git config --global --get user.email
global@test.com

• 配置用户名和邮件，加上–global是配置全局的，否则是配置当前仓库的，当前仓库的配置会覆盖全局配置

# 命令形式：git config [--global] [user.name or user.email]

$ git config --global user.name "test global"

$ git config user.name "test"

$ git config --global user.email "global@test.com"

$ git config user.email "local@test.com"

6. 查看提交记录

• 查看提交记录，当前分支的版本历史

#命令形式：git log

$ git log
commit d6813fdf94c37d51e952aee42155654fe333ef28
Author: *** <***@gmail.com>
Date:   Fri Oct 22 17:05:12 2016 +0800

    feat: edit README.md

commit f7ea1a04e423e135d92c4c93e4f188e7257b0cad
Author: *** <***@gmail.com>
Date:   Fri Oct 22 16:39:45 2016 +0800

    feat:develop

commit 68506c5f153fc303fa33ceb733bf15b6da690b00
Merge: 9b7d7c8 f777a9b
Author: *** <***@gmail.com>
Date:   Fri Oct 22 16:25:40 2016 +0800

    feat: test

commit 9b7d7c87c32e144ea1364c1a0aa0fe16f074c8d5
Author: *** <***@gmail.com>
Date:   Fri Oct 22 16:18:18 2016 +0800

• 显示commit历史，以及每次commit发生变更的文件

# 命令形式：git log --stat

$ git log --stat
commit afa74f2de6caede85b6b4beeefc3ec338ed42986
Author: *** <***@gmail.com>
Date:   Fri Oct 22 17:35:32 2016 +0800

    Update README.md

 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)


commit 9b313361b73cd76505c05e6b6ad3b0c6204357ce
Author: *** <***@gmail.com>
Date:   Fri Oct 22 17:25:28 2016 +0800

    feat: conflict

 README.md | 2 +-

• 查看最近的操作信息

# 命令形式：git reflog

$ git reflog
afa74f2 HEAD@{0}: checkout: moving from master to develop
d6813fd HEAD@{1}: merge refs/remotes/origin/master: Fast-forward
f777a9b HEAD@{2}: checkout: moving from develop to master
afa74f2 HEAD@{3}: pull: Fast-forward
d4c01a6 HEAD@{4}: commit (merge): feat: handle conflict
9b31336 HEAD@{5}: commit: feat: conflict
d6813fd HEAD@{6}: commit: feat: edit README.md
f7ea1a0 HEAD@{7}: commit: feat:develop
68506c5 HEAD@{8}: commit (merge): feat: test
9b7d7c8 HEAD@{9}: commit: feat:branch test
0b05e43 HEAD@{10}: checkout: moving from master to develop
f777a9b HEAD@{11}: pull: Fast-forward
0b05e43 HEAD@{12}: checkout: moving from develop to master
0b05e43 HEAD@{13}: checkout: moving from a to develop
0b05e43 HEAD@{14}: checkout: moving from develop to a
0b05e43 HEAD@{15}: checkout: moving from a to develop
0b05e43 HEAD@{16}: checkout: moving from origin/develop to a
0b05e43 HEAD@{17}: checkout: moving from 0b05e4388c3cb16d23a59f7238d59894c7f1fb8

• 显示缓存区和工作区的差异

# 命令形式：git diff

$ git diff
diff --git a/a.txt b/a.txt
index d00491f..cd6c7f8 100644
--- a/a.txt
+++ b/a.txt
@@ -1 +1 @@
-1
+1dfa

备注：还有很多没讲到，例如tag，但我感觉现有的东西已经足够用了，以后需要再去查资料吧。