Hi,
On 2014-09-24 18:57, Dennis Gilmore wrote:
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On Tue, 16 Sep 2014 16:23:40 +0200
Martin Wilhelm <[email protected]> wrote:
Reason:
1) We use mock to build a RPM. Mock does all the SCM-stuff via its
plugin. 2) This plugin actually does NOT do a "git submodule update
--init --recursive" after the branch checkout. 3) This leads to wrong
(old) submodule references. 4) Compile error.
Can you please explain this a little more. I am really not sure what
this is trying to do or why. and what effect if will have on users not
using the functionality you're using.
Dennis
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sorry for the long delay - here is a more in-detail explanation:
Actually, we use mock + mock-scm to build a rpm out of some projects
hosted in git. An example looks like:
mock --resultdir $(PWD)/RPMS/ -v --scm-enable \
--scm-option method=git \
--scm-option package=$(SYSTEM) \
--scm-option git_get='git clone --recursive $(GIT_URL) $(SYSTEM)' \
--scm-option spec=./$(SYSTEM).spec \
--scm-option branch=$(GIT_BRANCH) \
--scm-option exclude_vcs=False \
--scm-option write_tar=True $(RPM_DEFINES)
Doing so, a "git clone --recursive $(GIT_URL)" gets triggered
as specified with --scm-option git_get.
We also switch the branch to something non-master, done
with --scm-option branch=$(GIT_BRANCH). Inside the mock-scm code
you can see, that this would trigger:
if self.branch:
[...]
elif self.method == "git":
self.postget = "git checkout " + self.branch"
Means: After a "git clone --recursive" we do a "git checkout branch".
This is unfortunately not enough when having a git-project with
*branched* submodules.
Means: Every submodule could have different branches beside of "master".
The root-project points to some of these branches (using the according
git-hash).
But: That can only work if you issue a "git submodule update --init
--recursive" on your checkout after the mentioned "git checkout branch"
or the root-project will point to undefined git-hashes.
Thats why I extended the self.postget with a second command which gets
executed after "git checkout branch".
Regarding the effect on other users:
"git submodule update --init --recursive" gets triggered only if
you use the option "--scm-option branch".
And: If there are no submodules or submodules with no branches except
master, git simply does nothing (exit 0). That means: Nothing breaks,
same behavior as before.
For now, the little patch fixed some issues at least for us.
Anyway - it could make sense to add another parameter to mock to
enable/disable that behavior / or to add a "--scm-option git_postget"
to set some arbitrary extra commands to be executed lastly instead of
hardcoding these.
What do you think? Shall we go with a new option like "--scm-option
git_postget"?
Martin
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[email protected] /-/ http://www.system4.org
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