From c31f2da894b35fde4c2fca0dd4d110fcd26519f8 Mon Sep 17 00:00:00 2001
From: Adnan Maolood <me@adnano.co>
Date: Tue, 14 Jun 2022 17:42:23 -0400
Subject: [PATCH] frontmatter: Allow CRLF line endings

---
 frontmatter.go      | 8 +++++---
 frontmatter_test.go | 4 ++--
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/frontmatter.go b/frontmatter.go
index 175a399..e89433f 100644
--- a/frontmatter.go
+++ b/frontmatter.go
@@ -5,17 +5,19 @@ import "bytes"
 var (
 	frontmatterOpen  = []byte("---")
 	frontmatterClose = []byte("\n---")
+	lf               = []byte("\n")
+	crlf             = []byte("\r\n")
 )
 
 func extractFrontmatter(b []byte) (frontmatter, content []byte) {
 	if !bytes.HasPrefix(b, frontmatterOpen) {
 		return nil, b
 	}
-	if len(b) > len(frontmatterOpen) && b[len(frontmatterOpen)] != '\n' {
+	next := b[len(frontmatterOpen):]
+	if len(next) > 0 && !bytes.HasPrefix(next, lf) && !bytes.HasPrefix(next, crlf) {
 		return nil, b
 	}
-	b = b[len(frontmatterOpen):]
-
+	b = next
 	i := bytes.Index(b, frontmatterClose)
 	if i == -1 {
 		return b, nil
diff --git a/frontmatter_test.go b/frontmatter_test.go
index 29e25a0..db20ee8 100644
--- a/frontmatter_test.go
+++ b/frontmatter_test.go
@@ -65,10 +65,10 @@ func TestExtractFrontmatter(t *testing.T) {
 	for _, test := range tests {
 		frontmatter, content := extractFrontmatter([]byte(test.Raw))
 		if string(frontmatter) != test.Frontmatter {
-			t.Fatalf("expected frontmatter %q, got %q", test.Frontmatter, string(frontmatter))
+			t.Fatalf("expected frontmatter %q, got %q, raw %q", test.Frontmatter, string(frontmatter), test.Raw)
 		}
 		if string(content) != test.Content {
-			t.Fatalf("expected content %q, got %q", test.Content, string(content))
+			t.Fatalf("expected content %q, got %q, raw %q", test.Content, string(content), test.Raw)
 		}
 	}
 }