From 44bb74f8fabf281ca7a3ffcd92625e2969ccec8a Mon Sep 17 00:00:00 2001
From: Junya Akahira <j.akahira@gmail.com>
Date: Thu, 8 Jun 2023 16:32:34 +0900
Subject: [PATCH] Fix unexpected format when files do not end with newline

---
 editor/filter_vertical_formatter.go      | 3 +++
 editor/filter_vertical_formatter_test.go | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/editor/filter_vertical_formatter.go b/editor/filter_vertical_formatter.go
index 7864d2d..2745072 100644
--- a/editor/filter_vertical_formatter.go
+++ b/editor/filter_vertical_formatter.go
@@ -62,6 +62,9 @@ func trimTrailingDuplicatedNewLine(tokens hclwrite.Tokens) hclwrite.Tokens {
 		if tokens[end-1].Type == hclsyntax.TokenEOF {
 			// skip EOF
 			eof = tokens[end-1]
+			if tokens[end-2].Type != hclsyntax.TokenNewline {
+				break
+			}
 			continue
 		}
 		if tokens[end-1].Type == hclsyntax.TokenNewline &&
diff --git a/editor/filter_vertical_formatter_test.go b/editor/filter_vertical_formatter_test.go
index 7e69198..e5d7651 100644
--- a/editor/filter_vertical_formatter_test.go
+++ b/editor/filter_vertical_formatter_test.go
@@ -44,6 +44,12 @@ b1 {
 b2 l1 {}
 `,
 		},
+		{
+			name: "non-POSIX style end of file",
+			src:  `a0 = v0`,
+			ok:   true,
+			want: `a0 = v0`,
+		},
 	}
 
 	for _, tc := range cases {