refactor common role

roles/common/files/sftp/push_public_key.sh

@@ -0,0 +1,33 @@
+#!/bin/bash -e
+
+function usage {
+    echo "Usage: $0 <host> <public key file>"
+}
+
+host="$1"
+public_key_file="$2"
+
+if [[ $# -ne 2 ]]; then
+  >&2 usage
+  exit 1
+fi
+
+authorized_keys_file="/tmp/${host}-authorized_keys"
+
+sshpass -e sftp "${host}" <<-EOF
+  mkdir .ssh
+  chmod 0700 .ssh
+  get .ssh/authorized_keys "${authorized_keys_file}"
+EOF
+
+if grep -f "${public_key_file}" "${authorized_keys_file}" > /dev/null; then
+  exit 0
+fi
+
+echo "Adding public key '${public_key_file}' for ${host}"
+sshpass -e sftp "${host}" <<-EOF
+  !cat "${public_key_file}" >> "${authorized_keys_file}"
+  put "${authorized_keys_file}" .ssh/authorized_keys
+  chmod 0600 .ssh/authorized_keys
+EOF
+echo "Public key added!"