From e1a4b45aa571a01c4c9ac236e2b419d55b3673f9 Mon Sep 17 00:00:00 2001
From: John Crispin <john@phrozen.org>
Date: Wed, 10 Jul 2019 13:32:24 +0200
Subject: [PATCH] include/package.mk: Add support for src-checkout/ folder

This feature is similar to the SRC_TREE_OVERRIDE. However instead of having
to manually create a symlink inside the package folder, the buildsystem
will check if $(TOP_DIR)/src-checkout/$(PKG_NAME)/.git is present and use
this instead.

Signed-off-by: John Crispin <john@phrozen.org>
---
 .gitignore         |  1 +
 include/package.mk | 18 +++++++++++++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index 84e1a9d6d18c..1dea10c878c5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@
 /overlay
 /package/feeds
 /package/openwrt-packages
+/src-checkout
 key-build*
 *.orig
 *.rej
diff --git a/include/package.mk b/include/package.mk
index 06ff21b0b0af..c3818f176316 100644
--- a/include/package.mk
+++ b/include/package.mk
@@ -40,6 +40,10 @@ include $(INCLUDE_DIR)/prereq.mk
 include $(INCLUDE_DIR)/unpack.mk
 include $(INCLUDE_DIR)/depends.mk
 
+ifneq ($(wildcard $(TOPDIR)/src-checkout/$(PKG_NAME)/.git),)
+  USE_GIT_SRC_CHECKOUT:=1
+  QUILT:=1
+endif
 ifneq ($(if $(CONFIG_SRC_TREE_OVERRIDE),$(wildcard ./git-src)),)
   USE_GIT_TREE:=1
   QUILT:=1
@@ -129,6 +133,18 @@ ifeq ($(DUMP)$(filter prereq clean refresh update,$(MAKECMDGOALS)),)
   endif
 endif
 
+ifdef USE_GIT_SRC_CHECKOUT
+  define Build/Prepare/Default
+	mkdir -p $(PKG_BUILD_DIR)
+	ln -s $(TOPDIR)/src-checkout/$(PKG_NAME)/.git $(PKG_BUILD_DIR)/.git
+	( cd $(PKG_BUILD_DIR); \
+		git checkout .; \
+		git submodule update --recursive; \
+		git submodule foreach git config --unset core.worktree; \
+		git submodule foreach git checkout .; \
+	)
+  endef
+endif
 ifdef USE_GIT_TREE
   define Build/Prepare/Default
 	mkdir -p $(PKG_BUILD_DIR)
@@ -248,7 +264,7 @@ define Build/CoreTargets
 endef
 
 define Build/DefaultTargets
-  $(if $(USE_SOURCE_DIR)$(USE_GIT_TREE),,$(if $(strip $(PKG_SOURCE_URL)),$(call Download,default)))
+  $(if $(USE_SOURCE_DIR)$(USE_GIT_TREE)$(USE_GIT_SRC_CHECKOUT),,$(if $(strip $(PKG_SOURCE_URL)),$(call Download,default)))
   $(if $(DUMP),,$(Build/CoreTargets))
 
   define Build/DefaultTargets
-- 
2.30.2