From f912225d0bc665b112a059b193471efdeaa1f7e3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gonzalo=20Tornar=C3=ADa?= <tornaria@cmat.edu.uy>
Date: Sun, 12 Jan 2025 19:10:43 -0300
Subject: [PATCH] xbps-src: add a command `show-diff`

Usage: ./xbps-src show-diff PKG

Shows differences between the original sources and $wrksrc, in the form
of a patch that can be used for the template.

Note this ignores new files.
---
 xbps-src | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/xbps-src b/xbps-src
index c17270b62ee4b5..63e570dd7b1a00 100755
--- a/xbps-src
+++ b/xbps-src
@@ -968,6 +968,18 @@ case "$XBPS_TARGET" in
                 fi # The trailing space gets stripped before printing anyway
         done
         ;;
+    show-diff)
+        read_pkg ignore-problems
+        mkdir -p "${XBPS_STATEDIR}/show-diff"
+        cd "${XBPS_STATEDIR}/show-diff"
+        if [ ! -d clean-wrksrc ]; then
+            ( . "${XBPS_COMMONDIR}/hooks/do-extract/00-distfiles.sh"
+              wrksrc="$PWD/clean-wrksrc" hook )
+            ln -Ts clean-wrksrc a
+            ln -Trs "$wrksrc" b
+        fi
+        diff -ru a b | grep -v '^Only in b[/:]'
+        ;;
     dbulk-dump)
         read_pkg
         check_pkg_arch "$XBPS_CROSS_BUILD"