oci error: add error level and reference

Signed-off-by: liangchenye <liangchenye@huawei.com>

cmd/runtimetest/main.go

@@ -18,9 +18,11 @@ import (
 	"github.com/hashicorp/go-multierror"
 	"github.com/mndrix/tap-go"
 	rspec "github.com/opencontainers/runtime-spec/specs-go"
-	"github.com/opencontainers/runtime-tools/cmd/runtimetest/mount"
 	"github.com/syndtr/gocapability/capability"
 	"github.com/urfave/cli"
+
+	"github.com/opencontainers/runtime-tools/cmd/runtimetest/mount"
+	ociErr "github.com/opencontainers/runtime-tools/validate"
 )
 
 // PrGetNoNewPrivs isn't exposed in Golang so we define it ourselves copying the value from
@@ -660,11 +662,16 @@ func validate(context *cli.Context) error {
 	t := tap.New()
 	t.Header(0)
 
+	complianceLevelString := context.String("compliance-level")
+	complianceLevel := ociErr.ParseLevel(complianceLevelString)
 	var validationErrors error
 	for _, v := range defaultValidations {
 		err := v.test(spec)
 		t.Ok(err == nil, v.description)
 		if err != nil {
+			if e, ok := err.(*ociErr.OCIError); ok && e.Level < complianceLevel {
+				continue
+			}
 			validationErrors = multierror.Append(validationErrors, err)
 		}
 	}
@@ -674,6 +681,9 @@ func validate(context *cli.Context) error {
 			err := v.test(spec)
 			t.Ok(err == nil, v.description)
 			if err != nil {
+				if e, ok := err.(*ociErr.OCIError); ok && e.Level < complianceLevel {
+					continue
+				}
 				validationErrors = multierror.Append(validationErrors, err)
 			}
 		}
@@ -700,6 +710,11 @@ func main() {
 			Value: ".",
 			Usage: "Path to the configuration",
 		},
+		cli.StringFlag{
+			Name:  "compliance-level",
+			Value: "must",
+			Usage: "Compliance level (must or should)",
+		},
 	}
 
 	app.Action = validate

completions/bash/oci-runtime-tool

@@ -119,6 +119,13 @@ __oci-runtime-tool_complete_log_level() {
 	" -- "$cur" ) )
 }
 
+__oci-runtime-tool_complete_compliance_level() {
+	COMPREPLY=( $( compgen -W "
+		must
+		should
+	" -- "$cur" ) )
+}
+
 __oci-runtime-tool_complete_propagations() {
 	COMPREPLY=( $( compgen -W "
 		private
@@ -218,6 +225,10 @@ _oci-runtime-tool_oci-runtime-tool() {
 		--log-level
 	"
 
+	local options_with_args="
+		--compliance-level
+	"
+
 	local boolean_options="
 		--help -h
 		--host-specific
@@ -231,6 +242,10 @@ _oci-runtime-tool_oci-runtime-tool() {
 			__oci-runtime-tool_complete_log_level
 			return
 			;;
+		--compliance-level)
+			__oci-runtime-tool_complete_compliance_level
+			return
+			;;
 	esac
 
 	case "$cur" in

man/oci-runtime-tool.1.md

@@ -32,6 +32,9 @@ oci-runtime-tool is a collection of tools for working with the [OCI runtime spec
 **--log-level**=LEVEL
   Log level (panic, fatal, error, warn, info, or debug) (default: "error").
 
+**--compliance-level**=LEVEL
+  Compliance level (must or should) (default: "must").
+
 **-v**, **--version**
   Print version information.
 

validate/error.go

@@ -0,0 +1,69 @@
+package validate
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+)
+
+// ComplianceLevel represents the OCI compliance levels
+type ComplianceLevel int
+
+const (
+	ComplianceOptional ComplianceLevel = iota
+	ComplianceMay
+	ComplianceRecommended
+	ComplianceShould
+	ComplianceShouldNot
+	ComplianceShall
+	ComplianceShallNot
+	ComplianceRequired
+	ComplianceMustNot
+	ComplianceMust
+)
+
+// OCIErrorCode represents the compliance content
+type OCIErrorCode int
+
+const (
+	DefaultFilesystems OCIErrorCode = iota
+)
+
+// OCIError represents an error with compliance level and OCI reference
+type OCIError struct {
+	Level     ComplianceLevel
+	Reference string
+	Err       error
+}
+
+//FIXME: change to tagged spec releases
+const referencePrefix = "https://github.com/opencontainers/runtime-spec/blob/master/"
+
+var ociErrors = map[OCIErrorCode]OCIError{
+	DefaultFilesystems: OCIError{Level: ComplianceShould, Reference: "config-linux.md#default-filesystems"},
+}
+
+// ParseLevel takes a string level and returns the OCI compliance level constant
+func ParseLevel(level string) ComplianceLevel {
+	switch strings.ToUpper(level) {
+	case "SHOULD":
+		return ComplianceShould
+	case "MUST":
+		return ComplianceMust
+	default:
+		return ComplianceMust
+	}
+}
+
+// NewOCIError creates an OCIError by OCIErrorCode and message
+func NewOCIError(code OCIErrorCode, msg string) error {
+	err := ociErrors[code]
+	err.Err = errors.New(msg)
+
+	return &err
+}
+
+// Error returns the error message with OCI reference
+func (oci *OCIError) Error() string {
+	return fmt.Sprintf("%s\nRefer to: %s%s", oci.Err.Error(), referencePrefix, oci.Reference)
+}