From 66e3aa82fef6626a3f29f2eb190d9615c4d102e9 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Fri, 16 Apr 2021 15:52:50 +0100
Subject: [PATCH] Makefile: Tolerate inkscape flail

Reported-by: Matthew Vernon <matthewv@chiark.greenend.org.uk>
Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 Makefile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 952089a9..fa09d22b 100644
--- a/Makefile
+++ b/Makefile
@@ -55,7 +55,9 @@ SPHINXBUILD   = sphinx-build
 
 ifndef INKSCAPE_EXTENSIONS
 INKSCAPE ?= inkscape
-INKSCAPE_EXTENSIONS := $(shell $(INKSCAPE) -x)
+# inkscape 0.92.4: --extension-directory works, no --system-data-directory
+# inkscape 1.0.2: --system-data-directory, no --extension-directory
+INKSCAPE_EXTENSIONS := $(shell set -e; { sdd=$$( inkscape --system-data-directory ) && echo "$$sdd/extensions"; } || inkscape --extension-directory )
 endif
 RECOLOUR_SVG ?= $(INKSCAPE_EXTENSIONS)/color_replace.py
 
-- 
2.30.2