oc new-app: allow 'dot' in ENV variable names

fixes: openshift#8771

reuses validators from kubernetes/kubernetes#48986

pkg/oc/generate/app/env.go

@@ -9,7 +9,7 @@ import (
 	"strings"
 
 	"github.com/joho/godotenv"
-	utilenv "github.com/openshift/origin/pkg/oc/util/env"
+	"k8s.io/apimachinery/pkg/util/validation"
 	kapi "k8s.io/kubernetes/pkg/apis/core"
 )
 
@@ -39,13 +39,12 @@ func ParseEnvironment(vals ...string) (Environment, []string, []error) {
 	duplicates := []string{}
 	env := make(Environment)
 	for _, s := range vals {
-		valid := utilenv.IsValidEnvironmentArgument(s)
 		p := strings.SplitN(s, "=", 2)
-		if !valid || len(p) != 2 {
-			errs = append(errs, fmt.Errorf("invalid parameter assignment in %q", s))
+		key, val := p[0], p[1]
+		if err := validation.IsEnvVarName(key); len(err) != 0 {
+			errs = append(errs, fmt.Errorf("invalid parameter assignment in %q, %v", s, err))
 			continue
 		}
-		key, val := p[0], p[1]
 		if _, exists := env[key]; exists {
 			duplicates = append(duplicates, key)
 			continue
@@ -166,7 +165,7 @@ func LoadEnvironmentFile(filename string, stdin io.Reader) (Environment, error)
 		return nil, fmt.Errorf("Cannot read variables from file %q: %s", errorFilename, err)
 	}
 	for k, v := range env {
-		if !utilenv.IsValidEnvironmentArgument(fmt.Sprintf("%s=%s", k, v)) {
+		if err := validation.IsEnvVarName(k); len(err) != 0 {
 			return nil, fmt.Errorf("invalid parameter assignment in %s=%s", k, v)
 		}
 	}

pkg/oc/util/env/env.go

@@ -8,20 +8,16 @@ import (
 	"strings"
 
 	"k8s.io/apimachinery/pkg/util/sets"
+	"k8s.io/apimachinery/pkg/util/validation"
 	kapi "k8s.io/kubernetes/pkg/apis/core"
 )
 
 var argumentEnvironment = regexp.MustCompile(`(?ms)^(.+)\=(.*)$`)
-var validArgumentEnvironment = regexp.MustCompile(`(?ms)^(\w+)\=(.*)$`)
 
 func IsEnvironmentArgument(s string) bool {
 	return argumentEnvironment.MatchString(s)
 }
 
-func IsValidEnvironmentArgument(s string) bool {
-	return validArgumentEnvironment.MatchString(s)
-}
-
 func SplitEnvironmentFromResources(args []string) (resources, envArgs []string, ok bool) {
 	first := true
 	for _, s := range args {
@@ -50,8 +46,6 @@ func parseIntoEnvVar(spec []string, defaultReader io.Reader, envVarType string)
 	var remove []string
 	for _, envSpec := range spec {
 		switch {
-		case !IsValidEnvironmentArgument(envSpec) && !strings.HasSuffix(envSpec, "-"):
-			return nil, nil, fmt.Errorf("%ss must be of the form key=value and can only contain letters, numbers, and underscores", envVarType)
 		case envSpec == "-":
 			if defaultReader == nil {
 				return nil, nil, fmt.Errorf("when '-' is used, STDIN must be open")
@@ -63,13 +57,14 @@ func parseIntoEnvVar(spec []string, defaultReader io.Reader, envVarType string)
 			env = append(env, fileEnv...)
 		case strings.Contains(envSpec, "="):
 			parts := strings.SplitN(envSpec, "=", 2)
-			if len(parts) != 2 {
-				return nil, nil, fmt.Errorf("invalid %s: %v", envVarType, envSpec)
+			n, v := parts[0], parts[1]
+			if errs := validation.IsEnvVarName(n); len(errs) != 0 {
+				return nil, nil, fmt.Errorf("%ss env validation failed with errors: %v", envVarType, errs)
 			}
-			exists.Insert(parts[0])
+			exists.Insert(n)
 			env = append(env, kapi.EnvVar{
-				Name:  parts[0],
-				Value: parts[1],
+				Name:  n,
+				Value: v,
 			})
 		case strings.HasSuffix(envSpec, "-"):
 			remove = append(remove, envSpec[:len(envSpec)-1])