ref(driver): refactor out function type errors

Signed-off-by: Adam Reese <adam@reese.io>

cmd/helm/upgrade.go

@@ -19,7 +19,6 @@ package main
 import (
 	"fmt"
 	"io"
-	"strings"
 
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
@@ -125,9 +124,7 @@ func (o *upgradeOptions) run(out io.Writer) error {
 	if o.install {
 		// If a release does not exist, install it. If another error occurs during
 		// the check, ignore the error and continue with the upgrade.
-		_, err := o.client.ReleaseHistory(o.release, 1)
-
-		if err != nil && strings.Contains(err.Error(), driver.ErrReleaseNotFound(o.release).Error()) {
+		if _, err := o.client.ReleaseHistory(o.release, 1); err == driver.ErrReleaseNotFound {
 			fmt.Fprintf(out, "Release %q does not exist. Installing it now.\n", o.release)
 			io := &installOptions{
 				chartPath:        chartPath,

pkg/storage/driver/cfgmaps.go

@@ -66,7 +66,7 @@ func (cfgmaps *ConfigMaps) Get(key string) (*rspb.Release, error) {
 	obj, err := cfgmaps.impl.Get(key, metav1.GetOptions{})
 	if err != nil {
 		if apierrors.IsNotFound(err) {
-			return nil, ErrReleaseNotFound(key)
+			return nil, ErrReleaseNotFound
 		}
 
 		cfgmaps.Log("get: failed to get %q: %s", key, err)
@@ -132,7 +132,7 @@ func (cfgmaps *ConfigMaps) Query(labels map[string]string) ([]*rspb.Release, err
 	}
 
 	if len(list.Items) == 0 {
-		return nil, ErrReleaseNotFound(labels["name"])
+		return nil, ErrReleaseNotFound
 	}
 
 	var results []*rspb.Release
@@ -165,7 +165,7 @@ func (cfgmaps *ConfigMaps) Create(key string, rls *rspb.Release) error {
 	// push the configmap object out into the kubiverse
 	if _, err := cfgmaps.impl.Create(obj); err != nil {
 		if apierrors.IsAlreadyExists(err) {
-			return ErrReleaseExists(key)
+			return ErrReleaseExists
 		}
 
 		cfgmaps.Log("create: failed to create: %s", err)
@@ -203,7 +203,7 @@ func (cfgmaps *ConfigMaps) Delete(key string) (rls *rspb.Release, err error) {
 	// fetch the release to check existence
 	if rls, err = cfgmaps.Get(key); err != nil {
 		if apierrors.IsNotFound(err) {
-			return nil, ErrReleaseExists(rls.Name)
+			return nil, ErrReleaseExists
 		}
 
 		cfgmaps.Log("delete: failed to get release %q: %s", key, err)

pkg/storage/driver/driver.go

@@ -24,11 +24,11 @@ import (
 
 var (
 	// ErrReleaseNotFound indicates that a release is not found.
-	ErrReleaseNotFound = func(release string) error { return errors.Errorf("release: %q not found", release) }
+	ErrReleaseNotFound = errors.New("release: not found")
 	// ErrReleaseExists indicates that a release already exists.
-	ErrReleaseExists = func(release string) error { return errors.Errorf("release: %q already exists", release) }
+	ErrReleaseExists = errors.New("release: already exists")
 	// ErrInvalidKey indicates that a release key could not be parsed.
-	ErrInvalidKey = func(release string) error { return errors.Errorf("release: %q invalid key", release) }
+	ErrInvalidKey = errors.Errorf("release: invalid key")
 )
 
 // Creator is the interface that wraps the Create method.

pkg/storage/driver/memory.go

@@ -53,16 +53,16 @@ func (mem *Memory) Get(key string) (*rspb.Release, error) {
 	case 2:
 		name, ver := elems[0], elems[1]
 		if _, err := strconv.Atoi(ver); err != nil {
-			return nil, ErrInvalidKey(key)
+			return nil, ErrInvalidKey
 		}
 		if recs, ok := mem.cache[name]; ok {
 			if r := recs.Get(key); r != nil {
 				return r.rls, nil
 			}
 		}
-		return nil, ErrReleaseNotFound(key)
+		return nil, ErrReleaseNotFound
 	default:
-		return nil, ErrInvalidKey(key)
+		return nil, ErrInvalidKey
 	}
 }
 
@@ -131,7 +131,7 @@ func (mem *Memory) Update(key string, rls *rspb.Release) error {
 		rs.Replace(key, newRecord(key, rls))
 		return nil
 	}
-	return ErrReleaseNotFound(rls.Name)
+	return ErrReleaseNotFound
 }
 
 // Delete deletes a release or returns ErrReleaseNotFound.
@@ -141,12 +141,12 @@ func (mem *Memory) Delete(key string) (*rspb.Release, error) {
 	elems := strings.Split(key, ".v")
 
 	if len(elems) != 2 {
-		return nil, ErrInvalidKey(key)
+		return nil, ErrInvalidKey
 	}
 
 	name, ver := elems[0], elems[1]
 	if _, err := strconv.Atoi(ver); err != nil {
-		return nil, ErrInvalidKey(key)
+		return nil, ErrInvalidKey
 	}
 	if recs, ok := mem.cache[name]; ok {
 		if r := recs.Remove(key); r != nil {
@@ -155,7 +155,7 @@ func (mem *Memory) Delete(key string) (*rspb.Release, error) {
 			return r.rls, nil
 		}
 	}
-	return nil, ErrReleaseNotFound(key)
+	return nil, ErrReleaseNotFound
 }
 
 // wlock locks mem for writing

pkg/storage/driver/records.go

@@ -36,7 +36,7 @@ func (rs *records) Add(r *record) error {
 	}
 
 	if rs.Exists(r.key) {
-		return ErrReleaseExists(r.key)
+		return ErrReleaseExists
 	}
 
 	*rs = append(*rs, r)

pkg/storage/driver/secrets.go

@@ -66,7 +66,7 @@ func (secrets *Secrets) Get(key string) (*rspb.Release, error) {
 	obj, err := secrets.impl.Get(key, metav1.GetOptions{})
 	if err != nil {
 		if apierrors.IsNotFound(err) {
-			return nil, ErrReleaseNotFound(key)
+			return nil, ErrReleaseNotFound
 		}
 		return nil, errors.Wrapf(err, "get: failed to get %q", key)
 	}
@@ -123,7 +123,7 @@ func (secrets *Secrets) Query(labels map[string]string) ([]*rspb.Release, error)
 	}
 
 	if len(list.Items) == 0 {
-		return nil, ErrReleaseNotFound(labels["name"])
+		return nil, ErrReleaseNotFound
 	}
 
 	var results []*rspb.Release
@@ -155,7 +155,7 @@ func (secrets *Secrets) Create(key string, rls *rspb.Release) error {
 	// push the secret object out into the kubiverse
 	if _, err := secrets.impl.Create(obj); err != nil {
 		if apierrors.IsAlreadyExists(err) {
-			return ErrReleaseExists(rls.Name)
+			return ErrReleaseExists
 		}
 
 		return errors.Wrap(err, "create: failed to create")
@@ -187,7 +187,7 @@ func (secrets *Secrets) Delete(key string) (rls *rspb.Release, err error) {
 	// fetch the release to check existence
 	if rls, err = secrets.Get(key); err != nil {
 		if apierrors.IsNotFound(err) {
-			return nil, ErrReleaseExists(rls.Name)
+			return nil, ErrReleaseExists
 		}
 
 		return nil, errors.Wrapf(err, "delete: failed to get release %q", key)