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Let's assume that I have two Git repositories, A and B. B is a submodule of A.
For the sake of simplicity, let's also assume that I have a magic function, get_sha_B that, given an SHA commit from A, returns the desired SHA commit of B.
How do I run filter-branch on repo A such that each commit of repo A is rewritten to point to the desired commit of repo B, as returned by get_sha_B?
Thank you!
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In order to update an existing Git submodule, you need to execute the “git submodule update” with the “–remote” and the “–merge” option. Using the “–remote” command, you will be able to update your existing Git submodules without having to run “git pull” commands in each submodule of your project.
git-filter-branch can be used to get rid of a subset of files, usually with some combination of --index-filter and --subdirectory-filter .
The git submodule init command creates the local configuration file for the submodules, if this configuration does not exist. # add submodule and define the master branch as the one you want to track git submodule add -b master [URL to Git repo] git submodule init.
Figured it out! I'm going to answer my own question here:
I can use git update-index in conjunction with git filter-branch --index-filter.
Here's how to call update-index to modify the commit SHA of a submodule:
git update-index --cacheinfo 160000 88e6a302c42840440f9faac73f27efc6a3e0c1a6 pathto/mysubmodule
As best as I understand it, the 160000 is a magic number in Git used to identify a submodule.
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