git-init-remote

#!/bin/sh
# create remote origin and push

# use 'trunk' unless init.defaultBranch is set
default_branch=$(git config init.defaultBranch || echo 'trunk')
remote_host='your-remote-host'

# assuming the remote host has a directory in $HOME named git
toplevel=$(git rev-parse --show-toplevel)
remote_repo_path="git/${toplevel##*/}.git"

# if the remote repo exists, don't try to create it
ssh "$remote_host" "test -d $remote_repo_path || exit 1" || \
	ssh "$remote_host" "git init --bare $remote_repo_path"

# use newline as a word boundry character in the wildcard match
b=$'\n'
[[ ${b}$(git remote)${b} == *${b}origin${b}* ]] || \
	git remote add origin "$remote_host:$remote_repo_path"

test -z "$(git branch)" || \
	git push --set-upstream origin $default_branch