Issue #46: Removed @botkube help commands. Added Makefile to add support for git tags and docker build with versioning

.release

@@ -0,0 +1 @@
+release=1.0.0

.travis.yml

@@ -11,7 +11,7 @@ install:
   - go get -u golang.org/x/lint/golint
   - curl https://raw.githubusercontent.com/kubernetes/helm/master/scripts/get > get_helm.sh
   - chmod +x get_helm.sh
-  - sudo ./get_helm.sh
+  - ./get_helm.sh
 
 before_script:
   - hack/verify-gofmt.sh
@@ -21,4 +21,4 @@ before_script:
   - helm lint helm/botkube
 
 script:
-  - build/docker.sh infracloudio/botkube latest
+  - make 

Makefile

@@ -0,0 +1,51 @@
+IMAGE_REPO=infracloud/botkube
+TAG=$(shell cut -d'=' -f2- .release)
+
+.DEFAULT_GOAL := build
+.PHONY: release git-tag check-git-status build pre-build tag-image publish
+
+#Docker Tasks
+#Make a release
+release: check-git-status build tag-image publish git-tag 
+	@echo "Successfully released version $(TAG)"
+
+#Create a git tag
+git-tag:
+	@echo "Creating a git tag"
+	@git add .
+	@git commit -m "Bumped to version $(TAG)" ;
+	@git tag $(TAG) ;
+	@git push --tags origin master;
+	@echo 'Git tag pushed successfully' ;
+
+#Check git status
+check-git-status:
+	@echo "Checking git status"
+	@if [ -n "$(shell git tag | grep $(TAG))" ] ; then echo 'Tag already exists' && exit 1 ; fi
+	@if [ -z "$(shell git remote -v)" ] ; then echo 'No remote to push tags to' && exit 1 ; fi
+	@if [ -z "$(shell git config user.email)" ] ; then echo 'Unable to detect git credentials' && exit 1 ; fi
+
+#Build the image
+build: pre-build 
+	@echo "Building docker image"
+	@docker build --build-arg GOOS_VAL=$(shell go env GOOS) --build-arg GOARCH_VAL=$(shell go env GOARCH) -t $(IMAGE_REPO) -f build/Dockerfile --no-cache .
+	@echo "Docker image build successfully"
+
+#Pre-build checks
+pre-build:
+	@echo "Checking system information"
+	@if [ -z "$(shell go env GOOS)" ] || [ -z "$(shell go env GOARCH)" ] ; then echo 'Could not determine the system architecture.' && exit 1 ; fi
+
+
+#Tag images
+tag-image: 
+	@echo 'Tagging image'
+	@docker tag $(IMAGE_REPO) $(IMAGE_REPO):$(TAG)
+	@docker tag $(IMAGE_REPO) $(IMAGE_REPO):latest
+
+#Docker push image
+publish:
+	@echo "Pushing docker image to repository"
+	@docker login
+	@docker push $(IMAGE_REPO):$(TAG)
+	@docker push $(IMAGE_REPO):latest	

helm/botkube/values.yaml

@@ -6,7 +6,7 @@ replicaCount: 1
 
 image:
   repository: infracloud/botkube
-  tag: "0.4"
+  tag: "latest" 
   pullPolicy: Always
 
 nameOverride: ""

pkg/execute/executor.go

@@ -32,16 +32,13 @@ var validNotifierCommand = map[string]bool{
 var validPingCommand = map[string]bool{
 	"ping": true,
 }
-var validHelpCommand = map[string]bool{
-	"help": true,
-}
 
 var kubectlBinary = "/usr/local/bin/kubectl"
 
 const (
 	notifierStartMsg   = "Brace yourselves, notifications are coming from cluster '%s'."
 	notifierStopMsg    = "Sure! I won't send you notifications from cluster '%s' anymore."
-	unsupportedCmdMsg  = "Command not supported. Please run '@BotKube help' to see supported commands."
+	unsupportedCmdMsg  = "Command not supported. Please run /botkubehelp to see supported commands."
 	kubectlDisabledMsg = "Sorry, the admin hasn't given me the permission to execute kubectl command on cluster '%s'."
 )
 
@@ -116,60 +113,10 @@ func (e *DefaultExecutor) Execute() string {
 	if validPingCommand[args[0]] {
 		return runPingCommand(args, e.ClusterName)
 	}
-	if validHelpCommand[args[0]] {
-		return printHelp(e.ChannelName)
-	}
-	return unsupportedCmdMsg
-}
-
-func printHelp(channelName string) string {
-	kubecltCmdKeys := make([]string, 0, len(validKubectlCommands))
-	for cmd := range validKubectlCommands {
-		kubecltCmdKeys = append(kubecltCmdKeys, cmd)
+	if e.IsAuthChannel {
+		return unsupportedCmdMsg
 	}
-	allowedKubectl := strings.Join(kubecltCmdKeys, ", ")
-	helpMsg := `
-BotKube Help
-
-Usage:
-    @BotKube <kubectl command without kubectl prefix> [--cluster-name <cluster_name>]
-    @BotKube notifier [stop|start|status|showconfig]
-    @BotKube ping [--cluster-name <cluster-name>]
-
-Description:
-
-Kubectl commands:
-	- Executes kubectl commands on k8s cluster and returns output.
-
-	Example:
-	    @BotKube get pods
-	    @BotKube logs podname -n namespace
-	    @BotKube get deployment --cluster-name cluster_name
-
-	Allowed kubectl commands:
-    	%s
-
-Cluster Status:
-	- List all available Kubernetes Clusters and check connection health. 
-	- If flag specified, gives response from the specified cluster.
-
-	Example:
-		@BotKube ping
-		@BotKube ping --cluster-name mycluster
-
-Notifier commands:
-	- Commands to manage notifier (Runs only on configured channel %s).
-
-	Example:
-		@BotKube notifier stop          Stop sending k8s event notifications to Slack
-		@BotKube notifier start         Start sending k8s event notifications to Slack
-		@BotKube notifier status        Show running status of event notifier
-		@BotKube notifier showconfig    Show BotKube configuration for event notifier
-
-Options:
-	--cluster-name                  Get cluster specific response
-`
-	return fmt.Sprintf(helpMsg, allowedKubectl, channelName)
+	return ""
 }
 
 func printDefaultMsg() string {