Rando scripts

#!/usr/bin/env sh
set -eu
error_message() {
 ret=$?
 if [ $ret -ne 0 ]; then
 echo "Something went wrong. Did you push your branch? Did you set a remote tracking branch?"
 fi
 exit $ret
}
trap error_message EXIT
if [ $# == 0 ]; then
 branch_name=$(git rev-parse --abbrev-ref HEAD)
 remote_name=$(git config branch."$branch_name".remote)
 github_forked_org_name=$(git config remote."$remote_name".url | sed -E -e 's,^(https://|git@)github.com[:/]([a-z]+)/[a-z]+(\.git)?,2,円')
 github_origin_proj_url=$(git config remote.origin.url | sed -E -e 's,^(https://|git@)github.com[:/]([a-z]+/[a-z]+)(\.git)?,2,円')
 url="https://github.com/$github_origin_proj_url/compare/master...$github_forked_org_name:$branch_name?expand=1#files_bucket"
 open "$url"
else
 hub fetch origin refs/pull/"1ドル"/head:pr/"1ドル" && hub checkout pr/"1ドル"
fi