oh-my-git/levels/branches/grow

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title = Branches grow with you!
cards = checkout commit-auto branch branch-delete reset-hard
[description]
Note that there are two options to "travel to the end of a timeline":
First, you can directly travel to the commit, like we've done it before.
And second, you can travel to the branch label. In this case, when you make a new commit, the branch will grow with you, and still point at the end of the timeline!
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[cli]
To travel to a branch, type `git checkout name_of_the_branch`.
And to travel to the last commit, type `git checkout --detach name_of_the_branch`.
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[setup]
echo "You wrap the birthday present, and grab your concert ticket." > you
git add .
git commit -m "Evening preparations"
echo "You go to the birthday party!" >> you
git add .
git commit -m "Go to the birthday"
git branch birthday
git checkout HEAD~1
echo "You go to the concert!" > you
git add .
git commit -m "Go to the concert"
git branch concert
git checkout HEAD~1
git branch -D main
[win]
# Travel directly to the last yellow commit of the birthday timeline, make a change to 'you', and make a commit
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for commit in $(git cat-file --batch-check='%(objectname) %(objecttype)' --batch-all-objects | grep 'commit$' | cut -f1 -d' '); do
if test $(git rev-parse $commit^) = $(git rev-parse birthday); then
return 0
fi
done
return 1
# Travel to the blue 'concert' branch, make a change to 'you', and a commit.
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git show concert^ | grep "Go to the concert"