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bundle.go
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bundle.go
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package versionbundle
import (
"strings"
"github.com/coreos/go-semver/semver"
"github.com/giantswarm/microerror"
)
// Bundle represents a single version bundle exposed by an authority. An
// authority might exposes mutliple version bundles using the Capability
// structure. Version bundles are aggregated into a merged structure represented
// by the Aggregation structure. Also see the Aggregate function.
type Bundle struct {
// Components describe the components an authority exposes. Functionality of
// components listed here is guaranteed to be implemented in the according
// versions.
//
// NOTE that once this property is set it must never change again.
Components []Component `json:"components" yaml:"components"`
// Name is the name of the authority exposing the version bundle.
//
// NOTE that once this property is set it must never change again.
Name string `json:"name" yaml:"name"`
// Provider describes infrastructure provider that is specific for this
// Bundle.
Provider string `json:"provider,omitempty" yaml:"provider,omitempty"`
// Version describes the version of the version bundle. Versions of version
// bundles must be semver versions. Versions must not be duplicated. Versions
// should be incremented gradually.
//
// NOTE that once this property is set it must never change again.
Version string `json:"version" yaml:"version"`
}
func (b Bundle) ID() string {
n := strings.TrimSpace(b.Name)
p := strings.TrimSpace(b.Provider)
v := strings.TrimSpace(b.Version)
return n + ":" + p + ":" + v
}
func (b Bundle) IsMajorUpgrade(other Bundle) (bool, error) {
err := b.Validate()
if err != nil {
return false, microerror.Maskf(invalidBundleError, err.Error())
}
err = other.Validate()
if err != nil {
return false, microerror.Maskf(invalidBundleError, err.Error())
}
if b.Name != other.Name {
return false, microerror.Maskf(invalidBundleError, "bundle must be from the same authority")
}
bSemver := semver.New(b.Version)
otherSemver := semver.New(other.Version)
if bSemver.Compare(*otherSemver) >= 0 {
return false, nil
}
if bSemver.Major < otherSemver.Major {
return true, nil
}
return false, nil
}
func (b Bundle) IsMinorUpgrade(other Bundle) (bool, error) {
err := b.Validate()
if err != nil {
return false, microerror.Maskf(invalidBundleError, err.Error())
}
err = other.Validate()
if err != nil {
return false, microerror.Maskf(invalidBundleError, err.Error())
}
if b.Name != other.Name {
return false, microerror.Maskf(invalidBundleError, "bundle must be from the same authority")
}
bSemver := semver.New(b.Version)
otherSemver := semver.New(other.Version)
if bSemver.Compare(*otherSemver) >= 0 {
return false, nil
}
isMajor, err := b.IsMajorUpgrade(other)
if err != nil {
return false, microerror.Maskf(invalidBundleError, err.Error())
}
if isMajor {
return false, nil
}
if bSemver.Minor < otherSemver.Minor {
return true, nil
}
return false, nil
}
func (b Bundle) IsPatchUpgrade(other Bundle) (bool, error) {
err := b.Validate()
if err != nil {
return false, microerror.Maskf(invalidBundleError, err.Error())
}
err = other.Validate()
if err != nil {
return false, microerror.Maskf(invalidBundleError, err.Error())
}
if b.Name != other.Name {
return false, microerror.Maskf(invalidBundleError, "bundle must be from the same authority")
}
bSemver := semver.New(b.Version)
otherSemver := semver.New(other.Version)
if bSemver.Compare(*otherSemver) >= 0 {
return false, nil
}
isMajor, err := b.IsMajorUpgrade(other)
if err != nil {
return false, microerror.Maskf(invalidBundleError, err.Error())
}
if isMajor {
return false, nil
}
isMinor, err := b.IsMinorUpgrade(other)
if err != nil {
return false, microerror.Maskf(invalidBundleError, err.Error())
}
if isMinor {
return false, nil
}
if bSemver.Patch < otherSemver.Patch {
return true, nil
}
return false, nil
}
func (b Bundle) Validate() error {
for _, c := range b.Components {
err := c.Validate()
if err != nil {
return microerror.Maskf(invalidBundleError, err.Error())
}
}
if b.Name == "" {
return microerror.Maskf(invalidBundleError, "name must not be empty")
}
_, err := semver.NewVersion(b.Version)
if err != nil {
return microerror.Maskf(invalidBundleError, "version parsing failed with error %#q", err)
}
return nil
}