git sync between repos

steps

create 2 git repos and clone to local

     $ git clone https://github.com/gree2/bar.git
     $ git clone https://github.com/gree2/foo.git

check repos

bar

 $ cd bar

 $ git st
 On branch master

 Initial commit

 nothing to commit (create/copy files and use "git add" to track)

 $ ls

 $ git log
 fatal: your current branch 'master' does not have any commits yet

foo

 $ cd foo

 $ git st
 On branch master

 Initial commit

 nothing to commit (create/copy files and use "git add" to track)

 $ ls

 $ git log
 fatal: your current branch 'master' does not have any commits yet

do some change in bar repo

add python code hello.py
```
 #! coding: utf-8

 hello('hello')
```

commit it and push

 $ git add .

 $ git status
 On branch master

 Initial commit

 Changes to be committed:
   (use "git rm --cached <file>..." to unstage)

         new file:   hello.py


 $ git commit -m "add hello.py"
 [master (root-commit) 7de004d] add hello.py
  1 file changed, 3 insertions(+)
  create mode 100644 hello.py

 $ git push origin master
 Counting objects: 3, done.
 Writing objects: 100% (3/3), 241 bytes | 0 bytes/s, done.
 Total 3 (delta 0), reused 0 (delta 0)
 To https://github.com/gree2/bar.git
  * [new branch]      master -> master

let’s now change to foo repo

check its remote

 $ git remote -v
 origin  https://github.com/gree2/foo.git (fetch)
 origin  https://github.com/gree2/foo.git (push)

add a remote upstream point to bar repo

 $ git remote add upstream https://github.com/gree2/bar.git

 $ git remote -v
 origin  https://github.com/gree2/foo.git (fetch)
 origin  https://github.com/gree2/foo.git (push)
 upstream        https://github.com/gree2/bar.git (fetch)
 upstream        https://github.com/gree2/bar.git (push)

pull from upstream

 $ git pull upstream master
 remote: Counting objects: 3, done.
 remote: Total 3 (delta 0), reused 3 (delta 0), pack-reused 0
 Unpacking objects: 100% (3/3), done.
 From https://github.com/gree2/bar
  * branch            master     -> FETCH_HEAD
  * [new branch]      master     -> upstream/master

 $ git branch -a
 * master
   remotes/upstream/master

 $ ls
 hello.py

 $ git status
 On branch master
 Your branch is based on 'origin/master', but the upstream is gone.
   (use "git branch --unset-upstream" to fixup)
 nothing to commit, working directory clean

push to origin

 $ git push origin master
 Counting objects: 3, done.
 Writing objects: 100% (3/3), 241 bytes | 0 bytes/s, done.
 Total 3 (delta 0), reused 0 (delta 0)
 To https://github.com/gree2/foo.git
  * [new branch]      master -> master

repeat again

in repo bar

 $ git status
 On branch master
 Your branch is up-to-date with 'origin/master'.
 Changes not staged for commit:
   (use "git add <file>..." to update what will be committed)
   (use "git checkout -- <file>..." to discard changes in working directory)

         modified:   hello.py

 no changes added to commit (use "git add" and/or "git commit -a")

 $ git add .

 $ git status
 On branch master
 Your branch is up-to-date with 'origin/master'.
 Changes to be committed:
   (use "git reset HEAD <file>..." to unstage)

         modified:   hello.py


 $ git commit -m "add doc string to hello.py"
 [master 6aa43c3] add doc string to hello.py
  1 file changed, 1 insertion(+)

 $ git push origin master
 Counting objects: 3, done.
 Delta compression using up to 8 threads.
 Compressing objects: 100% (2/2), done.
 Writing objects: 100% (3/3), 298 bytes | 0 bytes/s, done.
 Total 3 (delta 0), reused 0 (delta 0)
 To https://github.com/gree2/bar.git
    7de004d..6aa43c3  master -> master

in repo foo

 $ git pull upstream master
 remote: Counting objects: 3, done.
 remote: Compressing objects: 100% (2/2), done.
 remote: Total 3 (delta 0), reused 3 (delta 0), pack-reused 0
 Unpacking objects: 100% (3/3), done.
 From https://github.com/gree2/bar
  * branch            master     -> FETCH_HEAD
    7de004d..6aa43c3  master     -> upstream/master
 Updating 7de004d..6aa43c3
 Fast-forward
  hello.py | 1 +
  1 file changed, 1 insertion(+)

 $ git status
 On branch master
 Your branch is ahead of 'origin/master' by 1 commit.
   (use "git push" to publish your local commits)
 nothing to commit, working directory clean

 $ git push origin master
 Counting objects: 3, done.
 Delta compression using up to 8 threads.
 Compressing objects: 100% (2/2), done.
 Writing objects: 100% (3/3), 298 bytes | 0 bytes/s, done.
 Total 3 (delta 0), reused 0 (delta 0)
 To https://github.com/gree2/foo.git
    7de004d..6aa43c3  master -> master

git sync between repos

steps

tbc