[coreboot-gerrit] Change in coreboot[master]: [WIP] payloads/external: Provide generic Makefile.git

[Nico Huber (Code Review)]

Nico Huber has uploaded this change for review. ( https://review.coreboot.org/21163

Change subject: [WIP] payloads/external: Provide generic Makefile.git
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[WIP] payloads/external: Provide generic Makefile.git

Provide a Makefile.git to be included by payloads built from Git.
Featuring:

* Offline mode, e.g. don't care if a later fetch failed.
* Fetching of origin, including tags and branch updates.
* Simplyfied checkout:
  Should work with commit hashes, local/remote branches and tags.
* Patch application, ported from tianocore, untested.
* Unexporting of variables exported by coreboot:
  No more sub-make confusion!
* The usual boilerplate.

Change-Id: I7557ca81fa1e32cd5c17c757e9458d048ff1ec99
Signed-off-by: Nico Huber 
---
A payloads/external/Makefile.git
1 file changed, 64 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/63/21163/1

diff --git a/payloads/external/Makefile.git b/payloads/external/Makefile.git
new file mode 100644
index 0000000..560991c
--- /dev/null
+++ b/payloads/external/Makefile.git
@@ -0,0 +1,64 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2017 Nico Huber 
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+project_rev	:= $(if $(strip $(project_rev)),$(project_rev),origin/master)
+project_dir	:= $(abspath $(project_dir))
+project_patches	?= $(wildcard $(CURDIR)/patches/*.patch)
+
+unexport $(COREBOOT_EXPORTS)
+MAKEOVERRIDES :=
+
+all: $(project_output)
+
+$(project_dir)/.git:
+	printf "    CLONE       $(project_name) into $(project_dir)\n"
+	git clone "$(project_repo)" "$(project_dir)"
+
+fetch: $(project_dir)/.git
+	-cd "$(project_dir)" && git fetch origin
+
+checkout: fetch
+	cd "$(project_dir)" && \
+	if ! git diff --quiet _cb_checkout "$(project_rev)" -- 2>/dev/null; \
+	then \
+		printf "    CHECKOUT    $(project_name) [$(project_rev)]\n"; \
+		git checkout $$(git rev-parse HEAD) >/dev/null 2>&1; \
+		git branch -f _cb_checkout "$(project_rev)" && \
+		git checkout _cb_checkout && \
+		$(if $(project_patches), \
+		for patch in $(project_patches); do \
+			printf "    PATCH       $$patch\n"; \
+			git am --keep-cr "$$patch" || \
+				( printf "Error when applying patches.\n"; \
+				  git am --abort; exit 1; ); \
+		done;,true;) \
+	fi
+
+$(project_output): checkout
+	printf "    MAKE        $(project_name) [$(project_rev)]\n"
+	$(MAKE) -C"$(dir $(project_output))" $(project_params)
+
+clean:
+	if [ -f "$(dir $(project_output))Makefile" ]; then \
+		$(MAKE) -C $(dir $(project_output)) clean || true; \
+	fi
+
+distclean:
+	rm -rf $(project_dir)
+
+print-repo-info:
+	printf "$(project_repo) $(project_dir)\n"
+
+.PHONY: all fetch checkout clean distclean print-repo-info