From 6facad88d95b1a058638b6a8c3eee26aac25b423 Mon Sep 17 00:00:00 2001
From: Benoit Pierre <benoit.pierre@gmail.com>
Date: Sun, 14 Apr 2024 17:32:33 +0200
Subject: [PATCH] make: speedup `fetchthirdparty`

- shallow clone submodules configured as such
- on CI, shallow clone all submodules
- use 3 jobs
---
 Makefile | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 23c4b0c17..65c8d0281 100644
--- a/Makefile
+++ b/Makefile
@@ -160,7 +160,18 @@ coverage: $(INSTALL_DIR)/koreader/.luacov
 fetchthirdparty:
 	git submodule init
 	git submodule sync
-	git submodule update
+ifneq (,$(CI))
+	git submodule update --depth 1 --jobs 3
+else
+	# Force shallow clones of submodules configured as such.
+	git submodule update --jobs 3 --depth 1 $(shell \
+		git config --file=.gitmodules --name-only --get-regexp '^submodule\.[^.]+\.shallow$$' true \
+		| sed 's/\.shallow$$/.path/' \
+		| xargs -n1 git config --file=.gitmodules \
+		)
+	# Update the rest.
+	git submodule update --jobs 3
+endif
 	$(MAKE) -C $(KOR_BASE) fetchthirdparty
 
 VERBOSE ?= @