git 和github简介

关于github不清楚的可以百度，

在这里，可以创建一个新的仓库

点击Create repository后会出现下面这些信息，其中第一块是仓库的url链接

第二块是你在本地目录中创建一个READEME.md文件，然后进行初始化，在add和commit提交到分支，然后再关联仓库，最后通过push 推送本地代码到github。

第三块其实就是已创建了本地仓库的前提下，执行第二块后面两行命令，推送代码到github

$ git remote add origin git@github.com:LaoNiNi/Test.git

fatal: remote origin already exists.

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$ git push -u origin master

Counting objects: , done.

Delta compression using up to  threads.

Compressing objects: % (/), done.

Writing objects: % (/),  bytes |  bytes/s, done.

Total  (delta ), reused  (delta )

To github.com:LaoNiNi/Test.git

   87faef8..43b2fe4  master -> master

Branch master set up to track remote branch master from origin.

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$

现在我们可以通过url来把代码clone到本地

通过 git branch -r 可以查看本地和远程相关联的git分支有哪些。通过push时指定提交分支，可以让分支和远程分支关联。

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$ git branch -r

  origin/master

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$ git branch

* master

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$ git branch dev

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$ git branch

  dev

* master

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$ gir branch -r

bash: gir: command not found

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$ git branch -r

  origin/master

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$ git branch dev

fatal: A branch named 'dev' already exists.

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$ git push -u origin dev

Total  (delta ), reused  (delta )

To github.com:LaoNiNi/Test.git

 * [new branch]      dev -> dev

Branch dev set up to track remote branch dev from origin.

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$ git branch -r

  origin/dev

  origin/master

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$

git branch

当别的同事create和push新的分支到github时，我可以通过git branch -a 查看本地分支和远程分支有哪些，我们clone代码时只会把默认分支（master）clone到本地，并不包括别的分支，所以需要通过 git checkout -b bug /origin/bug 命令创建新分支，并且切换到新分支，而且关联远程的bug分支。

通过git remote -v 可以查看当前关联哪个远程git，通过git remote remove origin可以删除当前关联项

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$ git remote -v

origin  git@github.com:LaoNiNi/Test.git (fetch)

origin  git@github.com:LaoNiNi/Test.git (push)

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$ git remote remove origin

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (master)

$ git remote -v

使用git pull origin 分支名称可以更新远程分支，并且合并我当前分支，如果有冲突，会在本地有冲突的文件里出现提示。

$ git add *

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git status

On branch master

Initial commit

Changes to be committed:

  (use "git rm --cached <file>..." to unstage)

        new file:   README.md

        new file:   README2.md

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git commit -m "commit newfile"

[master (root-commit) ae86fce] commit newfile

  files changed,  insertions(+)

 create mode  README.md

 create mode  README2.md

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git push origin dev

error: src refspec dev does not match any.

error: failed to push some refs to 'git@github.com:LaoNiNi/Test.git'

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git push origin master

To github.com:LaoNiNi/Test.git

 ! [rejected]        master -> master (fetch first)

error: failed to push some refs to 'git@github.com:LaoNiNi/Test.git'

hint: Updates were rejected because the remote contains work that you do

hint: not have locally. This is usually caused by another repository pushing

hint: to the same ref. You may want to first integrate the remote changes

hint: (e.g., 'git pull ...') before pushing again.

hint: See the 'Note about fast-forwards' in 'git push --help' for details.

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git pull origin master

warning: no common commits

remote: Counting objects: , done.

remote: Compressing objects: % (/), done.

remote: Total  (delta ), reused  (delta ), pack-reused

Unpacking objects: % (/), done.

From github.com:LaoNiNi/Test

 * branch            master     -> FETCH_HEAD

 * [new branch]      master     -> origin/master

fatal: refusing to merge unrelated histories

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git push origin master

To github.com:LaoNiNi/Test.git

 ! [rejected]        master -> master (non-fast-forward)

error: failed to push some refs to 'git@github.com:LaoNiNi/Test.git'

hint: Updates were rejected because the tip of your current branch is behind

hint: its remote counterpart. Integrate the remote changes (e.g.

hint: 'git pull ...') before pushing again.

hint: See the 'Note about fast-forwards' in 'git push --help' for details.

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ lws

bash: lws: command not found

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git status

On branch master

nothing to commit, working tree clean

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$

git pull push

但是git pull会自动帮我们合并分支，帮我们隐藏了很多细节，这样不能很好的掌控代码变化细节，

$ git add README2.md

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git status

On branch master

Changes to be committed:

  (use "git reset HEAD <file>..." to unstage)

        modified:   README2.md

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git commit -m "提交 This is a new file"

[master 6efcf83] 提交 This is a new file

  file changed,  insertions(+)

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git status

On branch master

nothing to commit, working tree clean

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git push origin master

To github.com:LaoNiNi/Test.git

 ! [rejected]        master -> master (non-fast-forward)

error: failed to push some refs to 'git@github.com:LaoNiNi/Test.git'

hint: Updates were rejected because the tip of your current branch is behind

hint: its remote counterpart. Integrate the remote changes (e.g.

hint: 'git pull ...') before pushing again.

hint: See the 'Note about fast-forwards' in 'git push --help' for details.

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git pull origin master

From github.com:LaoNiNi/Test

 * branch            master     -> FETCH_HEAD

fatal: refusing to merge unrelated histories

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ cat README2.md

# Test

This is a new file.

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git push origin master

To github.com:LaoNiNi/Test.git

 ! [rejected]        master -> master (non-fast-forward)

error: failed to push some refs to 'git@github.com:LaoNiNi/Test.git'

hint: Updates were rejected because the tip of your current branch is behind

hint: its remote counterpart. Integrate the remote changes (e.g.

hint: 'git pull ...') before pushing again.

hint: See the 'Note about fast-forwards' in 'git push --help' for details.

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git branch -a

* master

  remotes/origin/master

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ git checkout origin/master

Note: checking out 'origin/master'.

You are in 'detached HEAD' state. You can look around, make experimental

changes and commit them, and you can discard any commits you make in this

state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may

do so (now or later) by using -b with the checkout command again. Example:

  git checkout -b <new-branch-name>

HEAD is now at 43b2fe4... second commit

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 ((43b2fe4...))

$ cat README2.md

# Test

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 ((43b2fe4...))

$ git branch -a

* (HEAD detached at origin/master)

  master

  remotes/origin/master

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 ((43b2fe4...))

$ git checkout master

Previous HEAD position was 43b2fe4... second commit

Switched to branch 'master'

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test2 (master)

$ cat README2.md

# Test

This is a new file.

laoni@DESKTOP-TPPLHIB MINGW64 /c/laon

所以我们合并分支时，可以用merge 加上 --no-ff参数这样有问题可以撤销：

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test ((fc4efc3...))

$ cat README.md

哇哈哈

def adb():

    aa =

    bb = 

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test ((fc4efc3...))

$ git pull origin master

remote: Counting objects: , done.

remote: Compressing objects: % (/), done.

Unpacking objects: % (/), done.

remote: Total  (delta ), reused  (delta ), pack-reused

From github.com:LaoNiNi/Test

 * branch            master     -> FETCH_HEAD

   fc4efc3..83aa53b  master     -> origin/master

Updating fc4efc3..83aa53b

Fast-forward

 README.md |  +-

  file changed,  insertion(+),  deletion(-)

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test ((83aa53b...))

$ cat README.md

哇哈哈6666666666666666666666666666666666

def adb():

    aa =

    bb = 

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test ((83aa53b...))

$ git checkout origin/master

HEAD is now at 83aa53b... third remove

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test ((83aa53b...))

$ git branch -a

* (HEAD detached from d405ab6)

  dev

  master

  remotes/origin/master

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test ((83aa53b...))

$ cat README.md

哇哈哈6666666666666666666666666666666666

def adb():

    aa =

    bb = 

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test ((83aa53b...))

$ git checkout dev

Previous HEAD position was 83aa53b... third remove

Switched to branch 'dev'

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (dev)

$ git branch -a

* dev

  master

  remotes/origin/master

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (dev)

$ git merge origin/master --no-ff

Merge made by the 'recursive' strategy.

 README.md  |  +++++-

 README2.md |  ++++

  files changed,  insertions(+),  deletion(-)

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (dev)

$ cat README.md

哇哈哈6666666666666666666666666666666666

def adb():

    aa =

    bb = 

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (dev)

$ git log --oneline

bbb0d30 Merge remote-tracking branch 'origin/master' into dev

83aa53b third remove

fc4efc3 哇哈哈

d405ab6 second remove

 README.md remove

98aa011 abc

6efcf83 提交 This is a new file

ae86fce commit newfile

43b2fe4 second commit

87faef8 first commit

laoni@DESKTOP-TPPLHIB MINGW64 /c/laoni/PycharmProjects/new_test (dev)

$

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