From 6a84016f7a385fc6b2cd5d5e4f22be7fc7c4aefb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sim=C3=B3=20Albert=20i=20Beltran?= <sim6@bona.gent>
Date: Wed, 11 May 2022 10:38:06 +0200
Subject: [PATCH] Check docker-compose version
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Signed-off-by: Simó Albert i Beltran <sim6@bona.gent>
---
 dd-ctl | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/dd-ctl b/dd-ctl
index f47bddf..291faf3 100755
--- a/dd-ctl
+++ b/dd-ctl
@@ -2,6 +2,21 @@
 
 OPERATION="$1"
 
+# We need docker-compose >= 1.28 to catch configuration variables
+REQUIRED_DOCKER_COMPOSE_VERSION="1.28"
+
+docker_compose_version(){
+	docker-compose --version --short | sed 's/^docker-compose version \([^,]\+\),.*$/\1/'
+}
+
+check_docker_compose_version(){
+	# We cannot use sort -C because is not included in BusyBox v1.33.1 of docker:dind image
+	{
+		echo "$REQUIRED_DOCKER_COMPOSE_VERSION"
+		docker_compose_version
+	} | sort -c -V 2> /dev/null
+}
+
 help() {
 	cat <<-EOF
 	 Example: ./dd.ctl [operation] [arguments]
@@ -51,6 +66,11 @@ if [ "$OPERATION" != "prerequisites" ]; then
 		echo "You need to copy digitaldemocratic.conf.sample to digitaldemocratic.conf and adapt"
 		exit 1
 	fi
+	if ! check_docker_compose_version
+	then
+		echo "ERROR: Please use docker-compose greather than or equal to $REQUIRED_DOCKER_COMPOSE_VERSION." >&2
+		exit 1
+	fi
 fi
 
 BRANCH="${2:-master}"