23d20c9db5
If a packager wants to be able to support addititional arguments on his hook this will allow them to setup the configuration with these arguments. For example this would allow a hook developer to add support for a --debug flag to change the level of debugging in his hook. In order to complete this task, I had to vendor in the latest github.com://opencontainers/runtime-tools, which caused me to have to fix a Mount and Capability interface calls Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
129 lines
3.4 KiB
Go
129 lines
3.4 KiB
Go
// Package specerror implements runtime-spec-specific tooling for
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// tracking RFC 2119 violations.
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package specerror
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import (
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"fmt"
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"github.com/hashicorp/go-multierror"
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rfc2119 "github.com/opencontainers/runtime-tools/error"
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)
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const referenceTemplate = "https://github.com/opencontainers/runtime-spec/blob/v%s/%s"
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// Code represents the spec violation, enumerating both
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// configuration violations and runtime violations.
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type Code int64
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const (
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// NonError represents that an input is not an error
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NonError Code = 0x1a001 + iota
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// NonRFCError represents that an error is not a rfc2119 error
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NonRFCError
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)
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type errorTemplate struct {
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Level rfc2119.Level
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Reference func(version string) (reference string, err error)
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}
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// Error represents a runtime-spec violation.
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type Error struct {
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// Err holds the RFC 2119 violation.
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Err rfc2119.Error
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// Code is a matchable holds a Code
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Code Code
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}
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// LevelErrors represents Errors filtered into fatal and warnings.
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type LevelErrors struct {
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// Warnings holds Errors that were below a compliance-level threshold.
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Warnings []*Error
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// Error holds errors that were at or above a compliance-level
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// threshold, as well as errors that are not Errors.
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Error *multierror.Error
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}
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var ociErrors = map[Code]errorTemplate{}
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func register(code Code, level rfc2119.Level, ref func(versiong string) (string, error)) {
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if _, ok := ociErrors[code]; ok {
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panic(fmt.Sprintf("should not regist a same code twice: %v", code))
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}
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ociErrors[code] = errorTemplate{Level: level, Reference: ref}
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}
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// Error returns the error message with specification reference.
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func (err *Error) Error() string {
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return err.Err.Error()
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}
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// NewError creates an Error referencing a spec violation. The error
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// can be cast to an *Error for extracting structured information
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// about the level of the violation and a reference to the violated
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// spec condition.
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//
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// A version string (for the version of the spec that was violated)
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// must be set to get a working URL.
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func NewError(code Code, err error, version string) error {
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template := ociErrors[code]
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reference, err2 := template.Reference(version)
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if err2 != nil {
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return err2
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}
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return &Error{
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Err: rfc2119.Error{
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Level: template.Level,
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Reference: reference,
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Err: err,
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},
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Code: code,
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}
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}
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// FindError finds an error from a source error (multiple error) and
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// returns the error code if found.
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// If the source error is nil or empty, return NonError.
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// If the source error is not a multiple error, return NonRFCError.
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func FindError(err error, code Code) Code {
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if err == nil {
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return NonError
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}
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if merr, ok := err.(*multierror.Error); ok {
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if merr.ErrorOrNil() == nil {
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return NonError
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}
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for _, e := range merr.Errors {
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if rfcErr, ok := e.(*Error); ok {
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if rfcErr.Code == code {
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return code
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}
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}
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}
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}
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return NonRFCError
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}
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// SplitLevel removes RFC 2119 errors with a level less than 'level'
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// from the source error. If the source error is not a multierror, it
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// is returned unchanged.
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func SplitLevel(errIn error, level rfc2119.Level) (levelErrors LevelErrors, errOut error) {
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merr, ok := errIn.(*multierror.Error)
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if !ok {
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return levelErrors, errIn
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}
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for _, err := range merr.Errors {
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e, ok := err.(*Error)
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if ok && e.Err.Level < level {
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fmt.Println(e)
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levelErrors.Warnings = append(levelErrors.Warnings, e)
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continue
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}
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levelErrors.Error = multierror.Append(levelErrors.Error, err)
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}
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return levelErrors, nil
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}
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