chore(engine): update Go to 1.18 and fix linter warnings:

* update Go to 1.18
* update golangci-lint to 1.45.0
* fix linter warnings

Author: agneum

engine/.gitlab-ci.yml

@@ -1,5 +1,5 @@
 default:
-  image: golang:1.17
+  image: golang:1.18
 
 stages:
   - test
@@ -56,7 +56,7 @@ lint:
 ### Build binary.
 build-binary-alpine:
   <<: *only_engine
-  image: golang:1.17-alpine
+  image: golang:1.18-alpine
   stage: build-binary
   artifacts:
     paths:

engine/Makefile

@@ -32,7 +32,7 @@ help: ## Display the help message
 all: clean build ## Build all binary components of the project
 
 install-lint: ## Install the linter to $GOPATH/bin which is expected to be in $PATH
-	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.42.1
+	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.45.0
 
 run-lint: ## Run linters
 	golangci-lint run

engine/cmd/cli/commands/config/environment.go

@@ -47,7 +47,7 @@ func AddEnvironmentToConfig(c *cli.Context, cfg *CLIConfig, environmentID string
 	}
 
 	if _, ok := cfg.Environments[environmentID]; ok {
-		return errors.Errorf("Environment %q is already initialized.", environmentID)
+		return errors.Errorf("environment %q is already initialized", environmentID)
 	}
 
 	env := Environment{
@@ -80,7 +80,7 @@ func updateEnvironmentInConfig(c *cli.Context, cfg *CLIConfig, environmentID str
 
 	environment, ok := cfg.Environments[environmentID]
 	if !ok {
-		return errors.Errorf("Environment %q not found.", environmentID)
+		return errors.Errorf("environment %q not found", environmentID)
 	}
 
 	if c.NumFlags() == 0 {
@@ -135,7 +135,7 @@ func switchToEnvironment(cfg *CLIConfig, environmentID string) error {
 
 	_, ok := cfg.Environments[environmentID]
 	if !ok {
-		return errors.Errorf("Environment %q not found.", environmentID)
+		return errors.Errorf("environment %q not found", environmentID)
 	}
 
 	cfg.CurrentEnvironment = environmentID
@@ -151,7 +151,7 @@ func removeByID(cfg *CLIConfig, environmentID string) error {
 
 	_, ok := cfg.Environments[environmentID]
 	if !ok {
-		return errors.Errorf("Environment %q not found.", environmentID)
+		return errors.Errorf("environment %q not found", environmentID)
 	}
 
 	delete(cfg.Environments, environmentID)