From 678a0061d54ebaa672b21155b4af682d50182c82 Mon Sep 17 00:00:00 2001
From: Petri Lehtinen <petri@digip.org>
Date: Tue, 13 Aug 2019 12:52:04 +0300
Subject: [PATCH] Don't transform files whose TOC is unchanged

Looking at the code, this was always the intention, but there was a
small bug in the logic that this patch fixes.

This is helpful e.g. to check in CI that all TOCs have been updated,
like this:

    doctoc --stdout . | grep -q "should be updated" && echo "TOCs are out of date!"
---
 lib/transform.js                           | 2 +-
 test/fixtures/readme-with-code.md          | 5 +----
 test/fixtures/readme-with-custom-title.md  | 4 +---
 test/fixtures/readme-with-weird-headers.md | 3 +--
 4 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/lib/transform.js b/lib/transform.js
index 5b1370d..5344192 100644
--- a/lib/transform.js
+++ b/lib/transform.js
@@ -152,7 +152,7 @@ exports = module.exports = function transform(content, mode, maxHeaderLevel, tit
 
   var wrappedToc =  start + '\n' + toc + '\n' + end;
 
-  if (currentToc === toc) return { transformed: false };
+  if (currentToc === wrappedToc) return { transformed: false };
 
   var data = updateSection(lines.join('\n'), wrappedToc, matchesStart, matchesEnd, true);
   return { transformed : true, data : data, toc: toc, wrappedToc: wrappedToc };
diff --git a/test/fixtures/readme-with-code.md b/test/fixtures/readme-with-code.md
index 6f6c315..e05cd67 100644
--- a/test/fixtures/readme-with-code.md
+++ b/test/fixtures/readme-with-code.md
@@ -4,10 +4,7 @@ README to test doctoc with edge-case headers.
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 ## Table of Contents
 
-- [Single Backticks](#single-backticks)
-- [Multiple Backticks](#multiple-backticks)
-- [code tag](#code-tag)
-- [pre tag](#pre-tag)
+Out of date
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->
 
diff --git a/test/fixtures/readme-with-custom-title.md b/test/fixtures/readme-with-custom-title.md
index 2534d7f..a4adeed 100644
--- a/test/fixtures/readme-with-custom-title.md
+++ b/test/fixtures/readme-with-custom-title.md
@@ -6,9 +6,7 @@ README to test doctoc with user-specified titles.
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 ## Table of Contents
 
-- [Installation](#installation)
-- [API](#api)
-- [License](#license)
+Out of date
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->
 
diff --git a/test/fixtures/readme-with-weird-headers.md b/test/fixtures/readme-with-weird-headers.md
index 9465cfd..36dd1db 100644
--- a/test/fixtures/readme-with-weird-headers.md
+++ b/test/fixtures/readme-with-weird-headers.md
@@ -4,8 +4,7 @@ README to test doctoc with edge-case headers.
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 ## Table of Contents
 
-- [hasOwnProperty](#hasownproperty)
-- [something else](#something-else)
+Out of date
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->