Gfilui

I am new to juju,and i deployed two applications jenkins and git,

i am trying to add relation between the two charms,but i am not able to do.
i was configured below file in hooks as blow.

$cat server-relation-joined
#!/bin/bash

set -eux
relation-set hostname=`unit-get private-address` public-address=`unit-get public-address`
root@myStation/git/hooks#


root@myStation/git/hooks# ls
config-changed hooks.py install server-relation-joined start stop upgrade-charm
root@myStation/git/hooks# vi server-relation-joined
root@myStation/git/hooks# cd ..
root@myStation/git# charm build
build: Composing into /root/charms/trusty/git
build: Please add a `repo` key to your layer.yaml, with a url from which your layer can be cloned.
build: Changed file owned by another layer: hooks/server-relation-joined
build: Unable to continue due to unexpected modifications (try --force)
root@myStation/git# cd ..
root@myStation# charm build
build: Composing into /root/charms/trusty
build: Destination charm directory: /root/charms/trusty/trusty/trusty
build: Please add a `repo` key to your layer.yaml, with a url from which your layer can be cloned.
build: The top level layer expects a valid layer.yaml file
build: Processing layer: trusty (from .)
build: At least one layer must provide metadata.yaml
root@myStation# ls

and from the jenkins side i was configured as below.

$ cat server-relation-changed
#!/bin/bash

set -eux

server_address=`relation-get hostname`

if [ -z "$server_address" ]; then
 juju-log "No data sent yet"
 exit 0
fi
$


root@myStation/git# vi metadata.yaml
root@myStation/git# charm build
build: Composing into /root/charms/trusty/git
build: Please add a `repo` key to your layer.yaml, with a url from which your layer can be cloned.
build: The top level layer expects a valid layer.yaml file
build: Processing layer: git-server (from .)
proof: I: metadata name (git-server) must match directory name (git) exactly for local deployment.

is there anything i need to configure?