fix segfault when current context is invalid (#651)

Author: roi-codefresh

Makefile

@@ -1,4 +1,4 @@
-VERSION=v0.1.12
+VERSION=v0.1.13
 
 OUT_DIR=dist
 YEAR?=$(shell date +"%Y")

docs/releases/release_notes.md

@@ -23,7 +23,7 @@ cf version
 
 ```bash
 # download and extract the binary
-curl -L --output - https://github.com/codefresh-io/cli-v2/releases/download/v0.1.12/cf-linux-amd64.tar.gz | tar zx
+curl -L --output - https://github.com/codefresh-io/cli-v2/releases/download/v0.1.13/cf-linux-amd64.tar.gz | tar zx
 
 # move the binary to your $PATH
 mv ./cf-linux-amd64 /usr/local/bin/cf
@@ -36,7 +36,7 @@ cf version
 
 ```bash
 # download and extract the binary
-curl -L --output - https://github.com/codefresh-io/cli-v2/releases/download/v0.1.12/cf-darwin-amd64.tar.gz | tar zx
+curl -L --output - https://github.com/codefresh-io/cli-v2/releases/download/v0.1.13/cf-darwin-amd64.tar.gz | tar zx
 
 # move the binary to your $PATH
 mv ./cf-darwin-amd64 /usr/local/bin/cf

pkg/config/config.go

@@ -155,7 +155,13 @@ func (c *Config) GetCurrentContext() *AuthContext {
 	if c.contextOverride != "" {
 		ctx = c.contextOverride
 	}
-	return c.Contexts[ctx]
+
+	authCtx, ok := c.Contexts[ctx]
+	if !ok {
+		log.G().Fatalf(util.Doc("Current Codefresh context \"%s\" does not exist. "+
+			"You must select another context using '<BIN> config use-context <context>'"), ctx)
+	}
+	return authCtx
 }
 
 // NewClient creates a new codefresh client for the current context or for
@@ -172,7 +178,7 @@ func (c *Config) DeleteContext(name string) error {
 
 	delete(c.Contexts, name)
 	if c.CurrentContext == name {
-		log.G().Warnf(util.Doc("delete context is set as current context, specify a new current context with '<BIN> config use-context'"))
+		log.G().Warnf(util.Doc("Deleted context is set as current context, specify a new current context with '<BIN> config use-context'"))
 		c.CurrentContext = ""
 	}