adding docker checks in function file

sabayon-buildpackages

@@ -1,6 +1,8 @@
 #!/bin/bash
 set -e
 ROOT="${ROOT:-$PWD}"
+DOCKER_IMAGE="${DOCKER_IMAGE:-sabayon/builder-amd64}"
+. /sbin/sabayondevkit-functions.sh
 
 if [ $# -eq 0 ]
   then
@@ -8,8 +10,6 @@ if [ $# -eq 0 ]
    exit 1
 fi
 
-if [ "$(id -u)" != "0" ]; then
-  echo "!! If you are not running the script as root, your user should be in the docker group to use it. (sudo gpasswd -a $USER docker) !!"
-fi
+check_docker_requirements
 
-docker run --rm -v "$ROOT"/portage_artifacts:/usr/portage/packages -ti sabayon/builder-amd64 $@
+docker run --rm -v "$ROOT"/portage_artifacts:/usr/portage/packages -ti $DOCKER_IMAGE $@

sabayon-createrepo

@@ -1,15 +1,16 @@
 #!/bin/bash
 set -e
+. /sbin/sabayondevkit-functions.sh
+
 ROOT="${ROOT:-$PWD}"
 entropysrv=$(mktemp)
 createrepo=$(mktemp)
 REPOSITORY_NAME="${REPOSITORY_NAME:-default}"
 REPOSITORY_DESCRIPTION="${REPOSITORY_DESCRIPTION:-My Sabayon repository}"
+DOCKER_IMAGE="${DOCKER_IMAGE:-sabayon/builder-amd64}"
 EDITOR=cat
 
-if [ "$(id -u)" != "0" ]; then
-  echo "!! If you are not running the script as root, your user should be in the docker group to use it. (sudo gpasswd -a $USER docker) !!"
-fi
+check_docker_requirements
 
 echo "Repository: $REPOSITORY_NAME"
 echo "Repository Description: $REPOSITORY_DESCRIPTION"
@@ -72,6 +73,6 @@ docker run --rm --entrypoint /bin/bash -e REPOSITORY=$REPOSITORY_NAME -e EDITOR=
 		-v $createrepo:/sabayon/bin/create_repo.sh \
 		-v $entropysrv:/etc/entropy/server.conf \
 		-v "$ROOT"/portage_artifacts:/usr/portage/packages \
-		-ti sabayon/builder-amd64 /sabayon/bin/create_repo.sh || true
+		-ti $DOCKER_IMAGE /sabayon/bin/create_repo.sh || true
 rm -rf $createrepo
 rm -rf $entropysrv

sabayondevkit-functions.sh

@@ -1,5 +1,12 @@
 #!/bin/bash
 
+check_docker_requirements(){
+  if [ "$(id -u)" != "0" ]; then
+    groups | grep -q docker || echo "--> If you are not running the script as root, your user should be in the docker group to use it. (sudo gpasswd -a $USER docker)"
+  fi
+  ps aux | grep -q '[d]ocker' || echo "--> Be sure to have the docker daemon running (sudo systemctl start docker)"
+}
+
 build() {
 local SEARCH=$1
 local EMERGE_DEFAULT_ARGS=${2:---accept-properties=-interactive --verbose --oneshot --nospinner --quiet-build=y --quiet-fail --fail-clean=y --complete-graph --buildpkg}