From 9c9c6a0ccd333ae7610e7b4b55ce786306f00253 Mon Sep 17 00:00:00 2001
From: Luke Fritz <lukefritz@gmail.com>
Date: Mon, 16 Nov 2020 23:50:25 -0600
Subject: [PATCH] Add flag for removing leading H1 heading in markdown; fixes
 #35

---
 main.go              |  7 +++++++
 pkg/mark/markdown.go | 10 ++++++++++
 2 files changed, 17 insertions(+)

diff --git a/main.go b/main.go
index 57471ba..fbef083 100644
--- a/main.go
+++ b/main.go
@@ -123,6 +123,7 @@ Options:
   -f <file>            Use specified markdown file for converting to html.
   -k                   Lock page editing to current user only to prevent accidental
                         manual edits over Confluence Web UI.
+  --drop-h1            Don't include H1 headings in Confluence output.
   --dry-run            Resolve page and ancestry, show resulting HTML and exit.
   --compile-only       Show resulting HTML and don't update Confluence page content.
   --debug              Enable debug logs.
@@ -143,6 +144,7 @@ func main() {
 		compileOnly   = args["--compile-only"].(bool)
 		dryRun        = args["--dry-run"].(bool)
 		editLock      = args["-k"].(bool)
+		dropH1        = args["--drop-h1"].(bool)
 	)
 
 	if args["--debug"].(bool) {
@@ -286,6 +288,11 @@ func main() {
 
 	markdown = mark.CompileAttachmentLinks(markdown, attaches)
 
+	if dropH1 {
+		log.Info("Leading H1 heading will be excluded from the Confluence output")
+		markdown = mark.DropH1Markdown(markdown)
+	}
+
 	html := mark.CompileMarkdown(markdown, stdlib)
 
 	{
diff --git a/pkg/mark/markdown.go b/pkg/mark/markdown.go
index 622a9e1..4d92892 100644
--- a/pkg/mark/markdown.go
+++ b/pkg/mark/markdown.go
@@ -90,3 +90,13 @@ func CompileMarkdown(
 
 	return string(html)
 }
+
+// dropH1Markdown will drop leading H1 headings to prevent
+// duplication of or conflict with page titles.
+func DropH1Markdown(
+	markdown []byte,
+) []byte {
+	h1 := regexp.MustCompile(`^#[^#].*\n`)
+	markdown = h1.ReplaceAll(markdown, []byte(""))
+	return markdown
+}