From 8b69983f72dcb69aa74c35a0f8cf0ca7d363b5f5 Mon Sep 17 00:00:00 2001
From: Sebastian Tiedtke <sebastiantiedtke@gmail.com>
Date: Tue, 11 Oct 2022 10:44:24 -0400
Subject: [PATCH] Handle common shell block pre- and suffixes

---
 internal/renderer/json_test.go                        |  1 +
 .../testdata/.snapshots/TestParser_Renderer-symbols   |  1 +
 internal/renderer/testdata/symbols.md                 | 11 +++++++++++
 internal/snippets/snippet.go                          | 10 +++++++++-
 4 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 internal/renderer/testdata/.snapshots/TestParser_Renderer-symbols
 create mode 100644 internal/renderer/testdata/symbols.md

diff --git a/internal/renderer/json_test.go b/internal/renderer/json_test.go
index a0c480039..210d59485 100644
--- a/internal/renderer/json_test.go
+++ b/internal/renderer/json_test.go
@@ -21,6 +21,7 @@ var testCases = []string{
 	"doublecode",
 	"nocodeblock",
 	"equalvshash",
+	"symbols",
 }
 
 func TestParser_Renderer(t *testing.T) {
diff --git a/internal/renderer/testdata/.snapshots/TestParser_Renderer-symbols b/internal/renderer/testdata/.snapshots/TestParser_Renderer-symbols
new file mode 100644
index 000000000..04a6cf4bc
--- /dev/null
+++ b/internal/renderer/testdata/.snapshots/TestParser_Renderer-symbols
@@ -0,0 +1 @@
+{"document":[{"markdown":"# Leading dollar sign"},{"content":"$ deno install \\\n  --allow-read --allow-write \\\n  --allow-env --allow-net --allow-run \\\n  --no-check \\\n  -r -f https://deno.land/x/deploy/deployctl.ts\n","description":"# Leading dollar sign","language":"sh","lines":["deno install \\","  --allow-read --allow-write \\","  --allow-env --allow-net --allow-run \\","  --no-check \\","  -r -f https://deno.land/x/deploy/deployctl.ts"]},{"markdown":"# Trailing backslashes"}]}
diff --git a/internal/renderer/testdata/symbols.md b/internal/renderer/testdata/symbols.md
new file mode 100644
index 000000000..f981f7a8b
--- /dev/null
+++ b/internal/renderer/testdata/symbols.md
@@ -0,0 +1,11 @@
+# Leading dollar sign
+
+```sh
+$ deno install \
+  --allow-read --allow-write \
+  --allow-env --allow-net --allow-run \
+  --no-check \
+  -r -f https://deno.land/x/deploy/deployctl.ts
+```
+
+# Trailing backslashes
diff --git a/internal/snippets/snippet.go b/internal/snippets/snippet.go
index 008943077..8a980e2b4 100644
--- a/internal/snippets/snippet.go
+++ b/internal/snippets/snippet.go
@@ -34,12 +34,18 @@ func (s *Snippet) GetLines() []string {
 	var cmds []string
 
 	firstHasDollar := false
+	hasBslashSuffix := false
 	lines := strings.Split(s.Content, "\n")
 
 	for _, line := range lines {
 		if strings.HasPrefix(line, "$") {
 			firstHasDollar = true
 			line = strings.TrimLeft(line, "$")
+		} else if strings.HasSuffix(strings.TrimSpace(line), "\\") {
+			// really long shell command lines are often
+			// spaced out over multiple lines using \
+			firstHasDollar = false
+			hasBslashSuffix = true
 		} else if firstHasDollar {
 			// If the first line was prefixed with "$",
 			// then all commands should be as well.
@@ -48,7 +54,9 @@ func (s *Snippet) GetLines() []string {
 			continue
 		}
 
-		line = strings.TrimSpace(line)
+		if !hasBslashSuffix {
+			line = strings.TrimSpace(line)
+		}
 
 		if line == "" {
 			continue