checkout coreboot from github, rather than downloading release file

Author: osresearch

Makefile

@@ -27,21 +27,30 @@ endef
 # expansion during the first evaluation.
 #
 define define_module =
-  # Fetch and verify the source tar file
-  $(packages)/$($1_tar):
+  ifneq ("$($1_repo)","")
+    # Checkout the tree instead and touch the canary file so that we know
+    # that the files are all present. No signature hashes are checked in
+    # this case, since we don't have a stable version to compare against.
+    $(build)/$($1_dir)/.canary:
+	git clone "$($1_repo)" "$(build)/$($1_dir)"
+	touch "$$@"
+  else
+    # Fetch and verify the source tar file
+    $(packages)/$($1_tar):
 	wget -O "$$@" $($1_url)
-  $(packages)/.$1_verify: $(packages)/$($1_tar)
+    $(packages)/.$1_verify: $(packages)/$($1_tar)
 	echo "$($1_hash) $$^" | sha256sum --check -
 	touch "$$@"
 
-  # Unpack the tar file and touch the canary so that we know
-  # that the files are all present
-  $(build)/$($1_dir)/.canary: $(packages)/.$1_verify
+    # Unpack the tar file and touch the canary so that we know
+    # that the files are all present
+    $(build)/$($1_dir)/.canary: $(packages)/.$1_verify
 	tar -xf "$(packages)/$($1_tar)" -C "$(build)"
 	if [ -r patches/$1-$($1_version).patch ]; then \
 		( cd $(build)/$($1_dir) ; patch -p1 ) < patches/$1-$($1_version).patch; \
 	fi
 	touch "$$@"
+  endif
 
   # Copy our stored config file into the unpacked directory
   $(build)/$($1_dir)/.config: config/$1.config $(build)/$($1_dir)/.canary

modules/coreboot

@@ -3,9 +3,11 @@ modules += coreboot
 coreboot_version := git
 coreboot_dir := coreboot-$(coreboot_version)
 #coreboot_tar := coreboot-$(coreboot_version).tar.xz
-coreboot_tar := coreboot-4.4.tar.xz
-coreboot_url := https://www.coreboot.org/releases/$(coreboot_tar)
-coreboot_hash := ccfa3ea4e6b4a6ff3e4f1a8dc72d61f794af25bf0e73640e54b0b04733cc50a5
+#coreboot_tar := coreboot-4.4.tar.xz
+#coreboot_url := https://www.coreboot.org/releases/$(coreboot_tar)
+#coreboot_hash := ccfa3ea4e6b4a6ff3e4f1a8dc72d61f794af25bf0e73640e54b0b04733cc50a5
+
+coreboot_repo := https://github.com/osresearch/coreboot
 
 coreboot_configure := make oldconfig
 coreboot_output := build/coreboot.rom