From 61b0a9547822ad63957a13ff68843c4f578a46b8 Mon Sep 17 00:00:00 2001
From: Jonas Smedegaard <dr@jones.dk>
Date: Sun, 24 Nov 2024 14:03:27 +0100
Subject: add curriculum deltas

---
 bin/mddelta.sh | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100755 bin/mddelta.sh

(limited to 'bin/mddelta.sh')

diff --git a/bin/mddelta.sh b/bin/mddelta.sh
new file mode 100755
index 0000000..7db89f1
--- /dev/null
+++ b/bin/mddelta.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+
+# SPDX-FileCopyrightText: 2024 Jonas Smedegaard <dr@jones.dk
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# generate markdown-formatted word-based delta between two markdown files
+
+set -eu
+
+#dwdiff -A best -R -d ',.?:;[]()-_/' -W ' \t\n#' -w '<span style="color: red"><del>' -x '</del></span>' -y '<span style="color: green"><ins>' -z '</ins></span>' "$1" "$2"
+
+# annotate changes with both span and del/ins html tags
+#  * only del/ins confuses markdown parsers around unnumbered lists
+# inspiration: https://stackoverflow.com/a/2384393/18619283
+set - --start-insert='<span style="color: green"><ins>' --stop-insert='</ins></span>' "$@"
+set - --start-delete='<span style="color: red"><del>' --stop-delete='</del></span>' "$@"
+
+#  treat # as whitespace and other punctuation as delimiters
+set - --white-space=' \t\n#' --delimiters=',.?:;[]()-_/' "$@"
+
+# compact difference detection and representation
+set - --algorithm=best --repeat-markers "$@"
+
+#echo dwdiff "$@"
+exec dwdiff "$@"
-- 
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