From bd423bf84d2ddef9680f54670a1e6ec2d7a18329 Mon Sep 17 00:00:00 2001
From: Danny Canter <danny@dcantah.dev>
Date: Wed, 11 Oct 2023 21:49:27 -0700
Subject: [PATCH] Snapshotters: Export the root path

Some of the snapshotters that allow you to change their root location
were already doing this, this just makes all of them follow the same
pattern.

Signed-off-by: Danny Canter <danny@dcantah.dev>
(cherry picked from commit 32caaee)
Signed-off-by: Kern Walster <walster@amazon.com>
---
 plugin/plugin.go                     | 4 ++++
 snapshots/blockfile/plugin/plugin.go | 1 +
 snapshots/btrfs/plugin/plugin.go     | 2 +-
 snapshots/devmapper/plugin/plugin.go | 1 +
 snapshots/native/plugin/plugin.go    | 1 +
 snapshots/overlay/plugin/plugin.go   | 2 +-
 6 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/plugin/plugin.go b/plugin/plugin.go
index f1be877fcb29..7c854fdc3f99 100644
--- a/plugin/plugin.go
+++ b/plugin/plugin.go
@@ -104,6 +104,10 @@ const (
 	DeprecationsPlugin = "deprecations"
 )
 
+const (
+	SnapshotterRootDir = "root"
+)
+
 // Registration contains information for registering a plugin
 type Registration struct {
 	// Type of the plugin
diff --git a/snapshots/blockfile/plugin/plugin.go b/snapshots/blockfile/plugin/plugin.go
index 8381537cf9a0..a9de3a61596b 100644
--- a/snapshots/blockfile/plugin/plugin.go
+++ b/snapshots/blockfile/plugin/plugin.go
@@ -67,6 +67,7 @@ func init() {
 				opts = append(opts, blockfile.WithMountOptions(config.MountOptions))
 			}
 
+			ic.Meta.Exports[plugin.SnapshotterRootDir] = root
 			return blockfile.NewSnapshotter(root, opts...)
 		},
 	})
diff --git a/snapshots/btrfs/plugin/plugin.go b/snapshots/btrfs/plugin/plugin.go
index f6635846cc51..4cc9a0d1c297 100644
--- a/snapshots/btrfs/plugin/plugin.go
+++ b/snapshots/btrfs/plugin/plugin.go
@@ -52,7 +52,7 @@ func init() {
 				root = config.RootPath
 			}
 
-			ic.Meta.Exports = map[string]string{"root": root}
+			ic.Meta.Exports[plugin.SnapshotterRootDir] = root
 			return btrfs.NewSnapshotter(root)
 		},
 	})
diff --git a/snapshots/devmapper/plugin/plugin.go b/snapshots/devmapper/plugin/plugin.go
index dec4b37f84d5..5b246602b0a6 100644
--- a/snapshots/devmapper/plugin/plugin.go
+++ b/snapshots/devmapper/plugin/plugin.go
@@ -47,6 +47,7 @@ func init() {
 				config.RootPath = ic.Root
 			}
 
+			ic.Meta.Exports[plugin.SnapshotterRootDir] = config.RootPath
 			return devmapper.NewSnapshotter(ic.Context, config)
 		},
 	})
diff --git a/snapshots/native/plugin/plugin.go b/snapshots/native/plugin/plugin.go
index 8544f3ba00f0..c9461426a5aa 100644
--- a/snapshots/native/plugin/plugin.go
+++ b/snapshots/native/plugin/plugin.go
@@ -48,6 +48,7 @@ func init() {
 				root = config.RootPath
 			}
 
+			ic.Meta.Exports[plugin.SnapshotterRootDir] = root
 			return native.NewSnapshotter(root)
 		},
 	})
diff --git a/snapshots/overlay/plugin/plugin.go b/snapshots/overlay/plugin/plugin.go
index 6c6dce75da82..2b97a672433c 100644
--- a/snapshots/overlay/plugin/plugin.go
+++ b/snapshots/overlay/plugin/plugin.go
@@ -67,7 +67,7 @@ func init() {
 				oOpts = append(oOpts, overlay.WithMountOptions(config.MountOptions))
 			}
 
-			ic.Meta.Exports["root"] = root
+			ic.Meta.Exports[plugin.SnapshotterRootDir] = root
 			return overlay.NewSnapshotter(root, oOpts...)
 		},
 	})