From c3e2e9dd2d6cd165af9a4fb319c2e5a452b4044a Mon Sep 17 00:00:00 2001
From: Caleb Maclennan <caleb@alerque.com>
Date: Fri, 17 Sep 2021 21:33:18 +0300
Subject: [PATCH] chore(build): Inform Nix flake about current libtexpdf
 version

---
 Makefile.am | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile.am b/Makefile.am
index 7aa762c96d..4a4021cb61 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -109,7 +109,8 @@ sile-%.md: CHANGELOG.md
 update_libtexpdf:
 	$(GIT) diff-index --quiet --cached HEAD || exit 1 # die if anything already staged
 	$(GIT) submodule update --init --remote -- libtexpdf
-	$(GIT) add -- libtexpdf
+	$(GIT) submodule status -- libtexpdf | $(AWK) '{ print $$1 }' > libtexpdf.git-rev
+	$(GIT) add -- libtexpdf libtexpdf.git-rev
 	$(GIT) diff-index --quiet --cached HEAD || $(GIT) commit -m "chore(build): Pin latest libtexpdf library submodule"
 
 gh-pages: