From 84ec15a45c5769a19b06262195591fa4ed6a2059 Mon Sep 17 00:00:00 2001
From: Carolyn Van Slyck <me@carolynvanslyck.com>
Date: Sun, 3 Jul 2022 20:38:29 -0500
Subject: [PATCH] Add noop storage plugin

Add a storage plugin that doesn't store anything. This can be used by
people who want to use Porter to install bundles, but don't ever care
about seeing previously installed bundles.

Signed-off-by: Carolyn Van Slyck <me@carolynvanslyck.com>
---
 pkg/porter/internal_plugins.go     |  9 +++++
 pkg/storage/plugins/noop/noop.go   | 65 ++++++++++++++++++++++++++++++
 pkg/storage/plugins/noop/plugin.go | 21 ++++++++++
 3 files changed, 95 insertions(+)
 create mode 100644 pkg/storage/plugins/noop/noop.go
 create mode 100644 pkg/storage/plugins/noop/plugin.go

diff --git a/pkg/porter/internal_plugins.go b/pkg/porter/internal_plugins.go
index 57f45328e..19765a2e5 100644
--- a/pkg/porter/internal_plugins.go
+++ b/pkg/porter/internal_plugins.go
@@ -7,6 +7,8 @@ import (
 	"fmt"
 	"io"
 
+	"get.porter.sh/porter/pkg/storage/plugins/noop"
+
 	"get.porter.sh/porter/pkg/config"
 	"get.porter.sh/porter/pkg/plugins"
 	"get.porter.sh/porter/pkg/portercontext"
@@ -129,6 +131,13 @@ func getInternalPlugins() map[string]InternalPlugin {
 				return filesystem.NewPlugin(c, pluginCfg), nil
 			},
 		},
+		noop.PluginKey: {
+			Interface:       storageplugins.PluginInterface,
+			ProtocolVersion: storageplugins.PluginProtocolVersion,
+			Create: func(c *config.Config, pluginCfg interface{}) (plugin.Plugin, error) {
+				return noop.NewPlugin(c.Context)
+			},
+		},
 		mongodb.PluginKey: {
 			Interface:       storageplugins.PluginInterface,
 			ProtocolVersion: storageplugins.PluginProtocolVersion,
diff --git a/pkg/storage/plugins/noop/noop.go b/pkg/storage/plugins/noop/noop.go
new file mode 100644
index 000000000..9a3cb4ffa
--- /dev/null
+++ b/pkg/storage/plugins/noop/noop.go
@@ -0,0 +1,65 @@
+package noop
+
+import (
+	"context"
+
+	"get.porter.sh/porter/pkg/storage/plugins"
+	"go.mongodb.org/mongo-driver/bson"
+)
+
+var (
+	_ plugins.StorageProtocol = Store{}
+)
+
+// Store implements a noop storage plugin.
+type Store struct{}
+
+// NewStore creates a new storage plugin that does nothing.
+func NewStore() Store {
+	return Store{}
+}
+
+// Aggregate does nothing.
+func (s Store) Aggregate(ctx context.Context, opts plugins.AggregateOptions) ([]bson.Raw, error) {
+	return nil, nil
+}
+
+// EnsureIndex does nothing.
+func (s Store) EnsureIndex(ctx context.Context, opts plugins.EnsureIndexOptions) error {
+	return nil
+}
+
+// Count does nothing.
+func (s Store) Count(ctx context.Context, opts plugins.CountOptions) (int64, error) {
+	return 0, nil
+}
+
+// Find does nothing.
+func (s Store) Find(ctx context.Context, opts plugins.FindOptions) ([]bson.Raw, error) {
+	return nil, nil
+}
+
+// Insert does nothing
+func (s Store) Insert(ctx context.Context, opts plugins.InsertOptions) error {
+	return nil
+}
+
+// Patch does nothing
+func (s Store) Patch(ctx context.Context, opts plugins.PatchOptions) error {
+	return nil
+}
+
+// Remove does nothing
+func (s Store) Remove(ctx context.Context, opts plugins.RemoveOptions) error {
+	return nil
+}
+
+// Update does nothing
+func (s Store) Update(ctx context.Context, opts plugins.UpdateOptions) error {
+	return nil
+}
+
+// RemoveDatabase does nothing.
+func (s Store) RemoveDatabase(ctx context.Context) error {
+	return nil
+}
diff --git a/pkg/storage/plugins/noop/plugin.go b/pkg/storage/plugins/noop/plugin.go
new file mode 100644
index 000000000..683207f8c
--- /dev/null
+++ b/pkg/storage/plugins/noop/plugin.go
@@ -0,0 +1,21 @@
+package noop
+
+import (
+	"get.porter.sh/porter/pkg/portercontext"
+	"get.porter.sh/porter/pkg/storage/plugins"
+	"get.porter.sh/porter/pkg/storage/pluginstore"
+	"github.com/hashicorp/go-plugin"
+)
+
+const PluginKey = plugins.PluginInterface + ".porter.noop"
+
+var _ plugins.StorageProtocol = Plugin{}
+
+type Plugin struct {
+	*Store
+}
+
+func NewPlugin(c *portercontext.Context) (plugin.Plugin, error) {
+	impl := NewStore()
+	return pluginstore.NewPlugin(c, impl), nil
+}