handle git

env GIT_AUTHOR_NAME='Russ Cox'
env GIT_AUTHOR_EMAIL='rsc@golang.org'
env GIT_COMMITTER_NAME=$GIT_AUTHOR_NAME
env GIT_COMMITTER_EMAIL=$GIT_AUTHOR_EMAIL

git init

at 2018-04-17T15:43:22-04:00
unquote ''
cp stdout README
git add README
git commit -a -m 'empty README'
git branch -m master
git tag v1.2.3

at 2018-04-17T15:45:48-04:00
git branch v2
git checkout v2
echo 'v2'
cp stdout v2
git add v2
git commit -a -m 'v2'
git tag v2.3
git tag v2.0.1
git branch v2.3.4

at 2018-04-17T16:00:19-04:00
echo 'intermediate'
cp stdout foo.txt
git add foo.txt
git commit -a -m 'intermediate'

at 2018-04-17T16:00:32-04:00
echo 'another'
cp stdout another.txt
git add another.txt
git commit -a -m 'another'
git tag v2.0.2

at 2018-04-17T16:16:52-04:00
git checkout master
git branch v3
git checkout v3
mkdir v3/sub/dir
echo 'v3/sub/dir/file'
cp stdout v3/sub/dir/file.txt
git add v3
git commit -a -m 'add v3/sub/dir/file.txt'

at 2018-04-17T22:23:00-04:00
git checkout master
git tag -a v1.2.4-annotated -m 'v1.2.4-annotated'

git show-ref --tags --heads
cmp stdout .git-refs

-- .git-refs --
ede458df7cd0fdca520df19a33158086a8a68e81 refs/heads/master
9d02800338b8a55be062c838d1f02e0c5780b9eb refs/heads/v2
76a00fb249b7f93091bc2c89a789dab1fc1bc26f refs/heads/v2.3.4
a8205f853c297ad2c3c502ba9a355b35b7dd3ca5 refs/heads/v3
ede458df7cd0fdca520df19a33158086a8a68e81 refs/tags/v1.2.3
b004e48a345a86ed7a2fb7debfa7e0b2f9b0dd91 refs/tags/v1.2.4-annotated
76a00fb249b7f93091bc2c89a789dab1fc1bc26f refs/tags/v2.0.1
9d02800338b8a55be062c838d1f02e0c5780b9eb refs/tags/v2.0.2
76a00fb249b7f93091bc2c89a789dab1fc1bc26f refs/tags/v2.3