Web Application Developer (Ruby on Rails)
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Cloning the main project
$ cd ~
$ git clone [email protected]:ozgun/main_project.git
Initializing the submodule (sub project):
Create ~/main_project/.gitmodules file and add the followings lines to it:
[submodule "sub_project"]
path = sub_project
url = [email protected]:ozgun/sub_project.git
Run the following commands to initialize the submodule:
$ cd ~/main_project
$ git submodule init
$ git submodule update
“git submodule update” command does not checkout to “master” branch. So we need to create master branch and then switch to it as below:
$ cd ~/main_project/sub_project
$ git checkout master
When something changes in sub project
Since sub_project is a submodule in main_project, when something changed in submodule, main projects also needs to be notified(synced) about this change.
Adding a new file to submodule and pushing to sub_project’s repository
$ cd ~/main_project/sub_project
$ git checkout master # make sure you are working on master branch
$ touch README
$ git add README
$ git commit -am "Added README to sub_project - submodule update"
$ git push origin master
Pushing the main_project to remote repository
After we updated sub_project, we need to update main_project too.
$ cd ~/main_project
$ git checkout master
$ git status
After you run “git status” you should see something like this:
# On branch master
# Changed but not updated:
# (use "git add <file>..." to update what will be committed)
# (use "git checkout -- <file>..." to discard changes in working directory)
#
# modified: sub_project
#
no changes added to commit (use "git add" and/or "git commit -a")
Your main projects understands that something has changed inside the sub_project, so it is considered as “modified”. This means that we need to commit and then push to remote git repository as below:
$ cd ~/main_project
$ git add sub_project # Do not append "/" !
$ git commit -am "Submodule sub_project updated"
$ git push origin master
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