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revision.go
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revision.go
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package cmd
import (
"errors"
"fmt"
"os"
"strconv"
"github.com/spf13/cobra"
"k8s.io/helm/pkg/helm"
"github.com/databus23/helm-diff/diff"
"github.com/databus23/helm-diff/manifest"
)
type revision struct {
release string
client helm.Interface
detailedExitCode bool
suppressedKinds []string
revisions []string
outputContext int
includeTests bool
showSecrets bool
}
const revisionCmdLongUsage = `
This command compares the manifests details of a named release.
It can be used to compare the manifests of
- lastest REVISION with specified REVISION
$ helm diff revision [flags] RELEASE REVISION1
Example:
$ helm diff revision my-release 2
- REVISION1 with REVISION2
$ helm diff revision [flags] RELEASE REVISION1 REVISION2
Example:
$ helm diff revision my-release 2 3
`
func revisionCmd() *cobra.Command {
diff := revision{}
revisionCmd := &cobra.Command{
Use: "revision [flags] RELEASE REVISION1 [REVISION2]",
Short: "Shows diff between revision's manifests",
Long: revisionCmdLongUsage,
PreRun: func(*cobra.Command, []string) {
expandTLSPaths()
},
RunE: func(cmd *cobra.Command, args []string) error {
// Suppress the command usage on error. See #77 for more info
cmd.SilenceUsage = true
if v, _ := cmd.Flags().GetBool("version"); v {
fmt.Println(Version)
return nil
}
switch {
case len(args) < 2:
return errors.New("Too few arguments to Command \"revision\".\nMinimum 2 arguments required: release name, revision")
case len(args) > 3:
return errors.New("Too many arguments to Command \"revision\".\nMaximum 3 arguments allowed: release name, revision1, revision2")
}
if q, _ := cmd.Flags().GetBool("suppress-secrets"); q {
diff.suppressedKinds = append(diff.suppressedKinds, "Secret")
}
diff.release = args[0]
diff.revisions = args[1:]
if isHelm3() {
return diff.differentiateHelm3()
}
if diff.client == nil {
diff.client = createHelmClient()
}
return diff.differentiate()
},
}
revisionCmd.Flags().BoolP("suppress-secrets", "q", false, "suppress secrets in the output")
revisionCmd.Flags().BoolVar(&diff.showSecrets, "show-secrets", false, "do not redact secret values in the output")
revisionCmd.Flags().BoolVar(&diff.detailedExitCode, "detailed-exitcode", false, "return a non-zero exit code when there are changes")
revisionCmd.Flags().StringArrayVar(&diff.suppressedKinds, "suppress", []string{}, "allows suppression of the values listed in the diff output")
revisionCmd.Flags().IntVarP(&diff.outputContext, "context", "C", -1, "output NUM lines of context around changes")
revisionCmd.Flags().BoolVar(&diff.includeTests, "include-tests", false, "enable the diffing of the helm test hooks")
revisionCmd.SuggestionsMinimumDistance = 1
if !isHelm3() {
addCommonCmdOptions(revisionCmd.Flags())
}
return revisionCmd
}
func (d *revision) differentiateHelm3() error {
namespace := os.Getenv("HELM_NAMESPACE")
excludes := []string{helm3TestHook, helm2TestSuccessHook}
if d.includeTests {
excludes = []string{}
}
switch len(d.revisions) {
case 1:
releaseResponse, err := getRelease(d.release, namespace)
if err != nil {
return err
}
revision, _ := strconv.Atoi(d.revisions[0])
revisionResponse, err := getRevision(d.release, revision, namespace)
if err != nil {
return err
}
diff.Manifests(
manifest.Parse(string(revisionResponse), namespace, excludes...),
manifest.Parse(string(releaseResponse), namespace, excludes...),
d.suppressedKinds,
d.showSecrets,
d.outputContext,
os.Stdout)
case 2:
revision1, _ := strconv.Atoi(d.revisions[0])
revision2, _ := strconv.Atoi(d.revisions[1])
if revision1 > revision2 {
revision1, revision2 = revision2, revision1
}
revisionResponse1, err := getRevision(d.release, revision1, namespace)
if err != nil {
return prettyError(err)
}
revisionResponse2, err := getRevision(d.release, revision2, namespace)
if err != nil {
return prettyError(err)
}
seenAnyChanges := diff.Manifests(
manifest.Parse(string(revisionResponse1), namespace, excludes...),
manifest.Parse(string(revisionResponse2), namespace, excludes...),
d.suppressedKinds,
d.showSecrets,
d.outputContext,
os.Stdout)
if d.detailedExitCode && seenAnyChanges {
return Error{
error: errors.New("identified at least one change, exiting with non-zero exit code (detailed-exitcode parameter enabled)"),
Code: 2,
}
}
default:
return errors.New("Invalid Arguments")
}
return nil
}
func (d *revision) differentiate() error {
switch len(d.revisions) {
case 1:
releaseResponse, err := d.client.ReleaseContent(d.release)
if err != nil {
return prettyError(err)
}
revision, _ := strconv.Atoi(d.revisions[0])
revisionResponse, err := d.client.ReleaseContent(d.release, helm.ContentReleaseVersion(int32(revision)))
if err != nil {
return prettyError(err)
}
diff.Manifests(
manifest.ParseRelease(revisionResponse.Release, d.includeTests),
manifest.ParseRelease(releaseResponse.Release, d.includeTests),
d.suppressedKinds,
d.showSecrets,
d.outputContext,
os.Stdout)
case 2:
revision1, _ := strconv.Atoi(d.revisions[0])
revision2, _ := strconv.Atoi(d.revisions[1])
if revision1 > revision2 {
revision1, revision2 = revision2, revision1
}
revisionResponse1, err := d.client.ReleaseContent(d.release, helm.ContentReleaseVersion(int32(revision1)))
if err != nil {
return prettyError(err)
}
revisionResponse2, err := d.client.ReleaseContent(d.release, helm.ContentReleaseVersion(int32(revision2)))
if err != nil {
return prettyError(err)
}
seenAnyChanges := diff.Manifests(
manifest.ParseRelease(revisionResponse1.Release, d.includeTests),
manifest.ParseRelease(revisionResponse2.Release, d.includeTests),
d.suppressedKinds,
d.showSecrets,
d.outputContext,
os.Stdout)
if d.detailedExitCode && seenAnyChanges {
return Error{
error: errors.New("identified at least one change, exiting with non-zero exit code (detailed-exitcode parameter enabled)"),
Code: 2,
}
}
default:
return errors.New("Invalid Arguments")
}
return nil
}