From fdca10678bb388b9b88386a54af4d4512ec11392 Mon Sep 17 00:00:00 2001
From: KUOKA Yusuke <ykuoka@gmail.com>
Date: Thu, 10 Oct 2019 16:54:15 +0900
Subject: [PATCH] fix(helm3): `Error: unknown flag: --purge` on deletion via
 `helmfile sync` (#890)

Fixes #888
---
 pkg/state/state.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pkg/state/state.go b/pkg/state/state.go
index bb3128f1..79e087d6 100644
--- a/pkg/state/state.go
+++ b/pkg/state/state.go
@@ -434,7 +434,13 @@ func (st *HelmState) SyncReleases(affectedReleases *AffectedReleases, helm helme
 					if err != nil {
 						relErr = newReleaseError(release, err)
 					} else if installed {
-						deletionFlags := st.appendConnectionFlags([]string{"--purge"}, release)
+						var args []string
+						if isHelm3() {
+							args = []string{}
+						} else {
+							args = []string{"--purge"}
+						}
+						deletionFlags := st.appendConnectionFlags(args, release)
 						if err := helm.DeleteRelease(context, release.Name, deletionFlags...); err != nil {
 							affectedReleases.Failed = append(affectedReleases.Failed, release)
 							relErr = newReleaseError(release, err)