error when running build.sh

[zengyuxing007]

root@service-mesh-011122063081:~/openSource/pipy# ./build.sh
error: unknown option `show-current'
usage: git branch [] [-r | -a] [--merged | --no-merged]
or: git branch [] [-l] [-f] []
or: git branch [] [-r] (-d | -D) ...
or: git branch [] (-m | -M) []
or: git branch [] (-c | -C) []
or: git branch [] [-r | -a] [--points-at]
or: git branch [] [-r | -a] [--format]

[khas-flomesh]

Thank you for your contribution!
Yeah, this is caused by git 1.x. It was neglected because we use git 2.x by default.
I'll merge this PR.
Regards