Develop (#3)

* Update command added
* Ensure that the upgraded version is really greater
* Update command should not update prerelease
* Minor presentation changes
* Fix command generation in containers from docker-compose file
- Refactored service creation
* Place the full command to the "cmd" package
* Update cobra to v1.4.0
* Updated build and release creation
* Created an install script
* Add more doc
* Add some tests...
* Add a test directive in Makefile

compose/parser_test.go

@@ -0,0 +1,89 @@
+package compose
+
+import "testing"
+
+const DOCKER_COMPOSE_YML1 = `
+version: "3"
+
+services:
+    # first service, very basic
+    web:
+        image: nginx
+        ports:
+            - "80:80"
+        environment:
+            FOO: bar
+            BAZ: qux
+        networks:
+            - frontend
+
+
+    database:
+        image: postgres
+        networks:
+            - frontend
+        environment:
+          POSTGRES_USER: postgres
+          POSTGRES_PASSWORD: mysecretpassword
+          POSTGRES_DB: mydb
+        labels:
+            katenary.io/ports: "5432"
+
+`
+
+func TestParser(t *testing.T) {
+	p := NewParser("", DOCKER_COMPOSE_YML1)
+	p.Parse("test")
+
+	// check if the "web" and "database" service is parsed correctly
+	// by checking if the "ports" and "environment"
+	for name, service := range p.Data.Services {
+		if name == "web" {
+			if len(service.Ports) != 1 {
+				t.Errorf("Expected 1 port, got %d", len(service.Ports))
+			}
+			if service.Ports[0] != "80:80" {
+				t.Errorf("Expected port 80:80, got %s", service.Ports[0])
+			}
+			if len(service.Environment) != 2 {
+				t.Errorf("Expected 2 environment variables, got %d", len(service.Environment))
+			}
+			if service.Environment["FOO"] != "bar" {
+				t.Errorf("Expected FOO=bar, got %s", service.Environment["FOO"])
+			}
+			if service.Environment["BAZ"] != "qux" {
+				t.Errorf("Expected BAZ=qux, got %s", service.Environment["BAZ"])
+			}
+		}
+		// same for the "database" service
+		if name == "database" {
+			if len(service.Ports) != 1 {
+				t.Errorf("Expected 1 port, got %d", len(service.Ports))
+			}
+			if service.Ports[0] != "5432" {
+				t.Errorf("Expected port 5432, got %s", service.Ports[0])
+			}
+			if len(service.Environment) != 3 {
+				t.Errorf("Expected 3 environment variables, got %d", len(service.Environment))
+			}
+			if service.Environment["POSTGRES_USER"] != "postgres" {
+				t.Errorf("Expected POSTGRES_USER=postgres, got %s", service.Environment["POSTGRES_USER"])
+			}
+			if service.Environment["POSTGRES_PASSWORD"] != "mysecretpassword" {
+				t.Errorf("Expected POSTGRES_PASSWORD=mysecretpassword, got %s", service.Environment["POSTGRES_PASSWORD"])
+			}
+			if service.Environment["POSTGRES_DB"] != "mydb" {
+				t.Errorf("Expected POSTGRES_DB=mydb, got %s", service.Environment["POSTGRES_DB"])
+			}
+			// check labels
+			if len(service.Labels) != 1 {
+				t.Errorf("Expected 1 label, got %d", len(service.Labels))
+			}
+			// is label katenary.io/ports correct?
+			if service.Labels["katenary.io/ports"] != "5432" {
+				t.Errorf("Expected katenary.io/ports=5432, got %s", service.Labels["katenary.io/ports"])
+			}
+		}
+	}
+
+}