Fixing docker context when building in subfolders

cmd/build.go

@@ -16,7 +16,9 @@ package cmd
 
 import (
 	"errors"
+	"fmt"
 	"os"
+	"strings"
 
 	"git.psu.edu/k8s/devtool/config"
 	"git.psu.edu/k8s/devtool/environment"
@@ -120,8 +122,14 @@ func buildDockerAndDeploy(config config.Config) error {
 
 		dockerTag := image + ":" + tag.String()
 
+		dockerRootDir := "."
+		if idx := strings.LastIndex(dockerfile, "/"); idx != -1 {
+			dockerRootDir = dockerfile[:idx]
+			fmt.Println(dockerRootDir)
+		}
+
 		color.New(color.FgGreen).PrintFunc()("Building ", dockerTag)
-		err = environment.Run(true, "docker", "build", "-t", dockerTag, "-f", dockerfile, ".")
+		err = environment.Run(true, "docker", "build", "-t", dockerTag, "-f", dockerfile, dockerRootDir)
 		if err != nil {
 			return err
 		}