'What does "--remote" actually do in "git submodule update --remote"?
I just do not understand the help page of Git. So what does happen or what is the difference?
Assume I have a Git project A with a submodule B. Submodule B does have a submodule C. After cloning the repository A points to a specific commit of B. And B points to a specific commit of C.
If I am inside A I go to B by
cd B
Now I type
git submodule update --remote
or
git submodule update
What is the difference? Assuming that the remote server does have changes in A, B and C.
I guess that using "git submodule update --remote" keeps the reference to the specific version of C. Does using it without --remote
update to the latest version of C?
Solution 1:[1]
Suppose B is the only submodule of A.
cd A
git ls-tree -r HEAD | grep commit
The output is something like
160000 commit 0814c6ba8f45829f04709c56118868d2483444c2 foo
foo
is the submodule folder and 0814c6ba8f45829f04709c56118868d2483444c2
is its revision tracked by A's current commit.
git submodule update
does something like
cd B
git checkout 0814c6ba8f45829f04709c56118868d2483444c2
git submodule update --remote
is like
cd B
git fetch origin master
git checkout origin/master
By default master
and origin/master
are used. If the branch is specified by submodule.foo.branch = bar
in .gitmodule
, thenbar
and origin/bar
are used.
Solution 2:[2]
git submodule update --remote
allows you to use the submodule’s remote-tracking branch instead of the specific commit (aka. SHA) recorded in the supermodule.
git submodule update
allows you to use specific commit recorded in the supermodule.
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
Solution | Source |
---|---|
Solution 1 | ElpieKay |
Solution 2 | Taehyun Hwang |