From: Ying Wang <wangying@google.com>
Date: Tue, 4 Aug 2015 19:11:54 +0000 (-0700)
Subject: Fix writing clean_steps.mk in the first build.
X-Git-Tag: android-x86-7.1-r1~608^2~19^2~147^2~106^2
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=eadaa954ceadcf44fa7cc2b1327f786defa29c35;p=android-x86%2Fbuild.git

Fix writing clean_steps.mk in the first build.

Change-Id: Ieddc799f38e5d1522e329e8300bd9f49c26c70ae
---

diff --git a/core/cleanbuild.mk b/core/cleanbuild.mk
index c2386a423..788564471 100644
--- a/core/cleanbuild.mk
+++ b/core/cleanbuild.mk
@@ -54,6 +54,7 @@ endef
 # can have permission to touch it.
 include $(BUILD_SYSTEM)/cleanspec.mk
 INTERNAL_CLEAN_BUILD_VERSION := $(strip $(INTERNAL_CLEAN_BUILD_VERSION))
+INTERNAL_CLEAN_STEPS := $(strip $(INTERNAL_CLEAN_STEPS))
 
 # If the clean_steps.mk file is missing (usually after a clean build)
 # then we won't do anything.
@@ -108,7 +109,15 @@ endif
 
 # Write the new state to the file.
 #
+rewrite_clean_steps_file :=
 ifneq ($(CURRENT_CLEAN_BUILD_VERSION)-$(CURRENT_CLEAN_STEPS),$(INTERNAL_CLEAN_BUILD_VERSION)-$(INTERNAL_CLEAN_STEPS))
+rewrite_clean_steps_file := true
+endif
+ifeq ($(wildcard $(clean_steps_file)),)
+# This is the first build.
+rewrite_clean_steps_file := true
+endif
+ifeq ($(rewrite_clean_steps_file),true)
 $(shell \
   mkdir -p $(dir $(clean_steps_file)) && \
   echo "CURRENT_CLEAN_BUILD_VERSION := $(INTERNAL_CLEAN_BUILD_VERSION)" > \
@@ -121,6 +130,7 @@ endif
 CURRENT_CLEAN_BUILD_VERSION :=
 CURRENT_CLEAN_STEPS :=
 clean_steps_file :=
+rewrite_clean_steps_file :=
 INTERNAL_CLEAN_STEPS :=
 INTERNAL_CLEAN_BUILD_VERSION :=