gcc/contrib/git-add-user-branch.sh
Richard Earnshaw 612137e171 contrib: Change 'remote' for personal branches and add branch creation script
Whilst trying to convert the add vendor branch script to work with
personal branches I encountered a minor issue where git would report
ambiguous refs when checking out the new branch.

It turns out that this is because git considers <me>/<topic> to be
ambiguous if both

  refs/heads/<me>/<topic>

and

  refs/remotes/<me>/<topic>

exist in the list of known branches.

Having thought about this a bit, I think the best solution is to adopt
something more like the vendors space and call the remote users/<me>
(this also works better if you want to set up remotes to track other
users branches as well).

So this patch has two parts.

1) It updates gcc-git-customization.sh to set up the new 'remote' and
converts any existing remote and branches tracking that to the new
format
2) It adds a new script to set up a personal branch on the gcc git repository.

	* gcc-git-customization.sh: Use users/<pfx> for the personal remote
	rather than just <pfx>.  Convert any existing personal branches to the
	new remote.
	* git-add-user-branch.sh: New file.
2020-01-24 14:38:16 +00:00

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#! /bin/sh -e
# Create a new upstream user branch.
# Usage:
# contrib/git-add-user-branch.sh [<personal-prefix>/]<branch-name> <base>
usage ()
{
echo "Usage:"
echo " $0 [<personal-prefix>/]<branch-name> <start-point>"
echo
echo "personal space must already have been set up using"
echo "contrib/gcc-git-customization.sh"
exit 1
}
if [ $# != 2 ]
then
usage
fi
userpfx=$(git config --get "gcc-config.userpfx")
user=$(git config --get "gcc-config.user")
if [ -z "$userpfx" -o -z "$user" ]
then
usage
fi
branch=$(echo "$1" | sed -r "s:(${userpfx}/)?(.*)$:\2:")
start=$2
# Sanity check the new branch argument. If there is no '/', then the
# vendor will be the same as the entire first argument.
if [ -z "$branch" ]
then
usage
fi
git push users/${userpfx} ${start}:refs/users/${user}/heads/${branch}
git fetch -q users/${userpfx}
git branch ${userpfx}/${branch} remotes/users/${userpfx}/${branch}
echo "You are now ready to check out ${userpfx}/${branch}"
echo "To push the branch upstream use:"
echo " git push users/${userpfx} ${userpfx}/${branch}"