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Convert git submodules to git subtrees
#!/bin/bash -x
# This script will convert all your git submodules into git subtrees.
# This script ensures that your new subtrees point to the same commits as the
# old submodules did, unlike most other scripts that do this.
# THIS SCRIPT MUST BE PLACED OUTSIDE OF YOUR REPOSITORY!!!!!!!!!!
# Otherwise, the script will interfere with the git commits (unless you add it to .gitignore).
# Save the script in your home directory as `~/subtrees.sh`
# `cd` into your repository
# Run `~/subtrees.sh`
# Enjoy!
# extract the list of submodules from .gitmodule
cat .gitmodules |while read i
do
if [[ $i == \[submodule* ]]; then
echo converting $i
read i
# extract the module's prefix
mpath=$(echo $i | grep -E "(\S+)$" -o)
echo path: $mpath
read i
# extract the url of the submodule
murl=$(echo $i|cut -d\= -f2|xargs)
echo url: $murl
# extract the module name
mname=$(basename $mpath)
echo name: $mname
# extract the referenced commit
mcommit=$(git submodule status $mpath | grep -E "\S+" -o | head -1)
echo commit: $mcommit
# deinit the module
git submodule deinit $mpath
# remove the module from git
git rm -r --cached $mpath
# remove the module from the filesystem
rm -rf $mpath
# commit the change
git commit -m "Removed $mpath submodule at commit $mcommit"
# add the remote
git remote add -f $mname $murl
# add the subtree
git subtree add --prefix $mpath $mcommit --squash
# commit any left over uncommited changes
git commit -a -m "$mname cleaned up"
# fetch the files
git fetch $murl master
echo
fi
done
git rm .gitmodules
git commit -a -m "Removed .gitmodules"
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