From 311a3406878d4f02ffe4c087ece82f9d4156ff92 Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Mon, 19 Sep 2022 03:11:40 +0200
Subject: Add prefixes to identifiers with `--file-scope`. (#8282)

This change only affects the case where `--file-scope` is used
and more than one file is specified on the command line.

In this case, identifiers will be prefixed with a string
derived from the file path, to disambiguate them. For example,
an identifier `foo` in `contents/file1.txt` will become
`contents__file1.txt__foo`.  Links will be adjusted accordingly:
if `file2.txt` links to `file1.txt#foo`, then the link will
be changed to point to `#file1.txt__foo`.  Similarly, a link
to `file1.txt` will point to `#file1.txt`.  A Div with an
identifier derived from the file path will be added around
each file's content, so that links to files will still work.

Closes #6384.

[API change]: Text.Pandoc.Shared exports `textToIdentifier`.
---
 test/command/6384.md   | 16 ++++++++++++++++
 test/command/file1.txt |  9 +++++++++
 test/command/file2.txt |  5 +++++
 3 files changed, 30 insertions(+)
 create mode 100644 test/command/6384.md
 create mode 100644 test/command/file1.txt
 create mode 100644 test/command/file2.txt

(limited to 'test/command')

diff --git a/test/command/6384.md b/test/command/6384.md
new file mode 100644
index 000000000..1be1c3e45
--- /dev/null
+++ b/test/command/6384.md
@@ -0,0 +1,16 @@
+```
+% pandoc --wrap=preserve --file-scope command/file1.txt command/file2.txt
+^D
+<div id="command__file1.txt">
+<h1 id="command__file1.txt__zed">Zed</h1>
+<p><a href="bar">foo</a>
+and <a href="#command__file1.txt__zed">Zed</a>
+and <a href="#command__file2.txt__zed">other Zed</a>
+and <a href="#command__file2.txt">other file</a>
+and <a href="c.md#zed">foreign Zed</a></p>
+</div>
+<div id="command__file2.txt">
+<h2 id="command__file2.txt__zed">Zed</h2>
+<p><a href="baz">foo</a></p>
+</div>
+```
diff --git a/test/command/file1.txt b/test/command/file1.txt
new file mode 100644
index 000000000..5416f3a6c
--- /dev/null
+++ b/test/command/file1.txt
@@ -0,0 +1,9 @@
+# Zed
+
+[foo]: bar
+
+[foo]
+and [Zed](#zed)
+and [other Zed](command/file2.txt#zed)
+and [other file](command/file2.txt)
+and [foreign Zed](c.md#zed)
diff --git a/test/command/file2.txt b/test/command/file2.txt
new file mode 100644
index 000000000..20ee06c8c
--- /dev/null
+++ b/test/command/file2.txt
@@ -0,0 +1,5 @@
+## Zed
+
+[foo]: baz
+
+[foo]
-- 
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