普法Android.mk中的一些宏和Android.bp对应关系

本文介绍: 陆陆续续有不少小伙伴在后台咨询关于And roi d.mk怎么转换成And ro di.bp的问题，虽然也解答了不少，但是也有一些当时我没有能够给出及时的答复(不是我不想答复，而是确实有些我当时也没有一个具体的答案)。这里最后留下一个小彩蛋，对于上述的Android.mk读者朋友看看能否正确的转换为Andro id.bp，当然也希望读者能我一起探讨是最好的了。同时在同一个目录下面的android mk _test.go，为我们提供了许多Andro id.mk 转换为Andro id.b p的实例，这个非常值得我们借鉴。…..

Andro id源码编译系列博客:

博客断更很久了，是时候动动我勤劳的双手，继续耕耘了！陆陆续续有不少小伙伴在后台咨询关于Android.m k怎么转换成Androdi.bp的问题，虽然也解答了不少，但是也有一些当时我没有能够给出及时的答复(不是我不想答复，而是确实有些我当时也没有一个具体的答案)。其中小伙们询问的最最多多的就是Android.mk中的一些预先定义的宏怎么在Android.bp中找到相对应的。这不我就抽空，来给大伙福利一波，来捯饬捯饬这个问题。

我们知道 google为Android.mk到Android.bp的转换提供了一个工具 androidmk(如果读者对该工具不是很熟悉，可以参见博客 Android.bp入门指南之Android.mk转换成Android.bp)但是该工具非常鸡肋，转换效率不是非常好，对一些Android.mk中的宏基本不能正常转换，我这里简单举出一个例子，测试Android.mk如下:

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := 
        a.c
ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
    LOCAL_CFLAGS += -DXXX
    LOCAL_SRC_FILES += 
                      b.c
else ifeq ($(TARGET_ARCH_ABI),arm64-v8a)
    LOCAL_CFLAGS += -DXXX
    LOCAL_SRC_FILES += 
                      c.c
endif

LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
LOCAL_C_INCLUDES += $(LOCAL_PATH)/include
LOCAL_MODULE := libyuv_static
LOCAL_MODULE_TAGS := optional
include $(BUILD_STATIC_LIBRARY)

有一定Android.mk语法的小伙们一定对上述的，一看就一目了然了，可是当我们需要使用 androidmk转换成Android.bp的时候，却会有如下的尴尬一幕:

cc_library_static {
    name: "libyuv_static",
    srcs: ["a.c"] + ["b.c"] + ["c.c"], // ANDROIDMK TRANSLATION ERROR: unsupported conditional
    // ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)

    // ANDROIDMK TRANSLATION ERROR: else from unsupported conditional
    // else
    // ANDROIDMK TRANSLATION ERROR: unsupported conditional
    // ifeq ($(TARGET_ARCH_ABI),arm64-v8a)
    cflags: ["-DXXX"] + ["-DXXX"],

    // ANDROIDMK TRANSLATION ERROR: endif from unsupported conditional
    // endif

    // ANDROIDMK TRANSLATION ERROR: unsupported assignment to LOCAL_EXPORT_C_INCLUDES
    // LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include

    local_include_dirs: ["include"],

	//android.go
	"LOCAL_32_BIT_ONLY":           local32BitOnly,
	"LOCAL_AIDL_INCLUDES":         localAidlIncludes,
	"LOCAL_ASSET_DIR":             localizePathList("asset_dirs"),
	"LOCAL_C_INCLUDES":            localIncludeDirs,
	"LOCAL_EXPORT_C_INCLUDE_DIRS": exportIncludeDirs,
	"LOCAL_JARJAR_RULES":          localizePath("jarjar_rules"),
	"LOCAL_LDFLAGS":               ldflags,
	"LOCAL_MODULE_CLASS":          prebuiltClass,
	"LOCAL_MODULE_STEM":           stem,
	"LOCAL_MODULE_HOST_OS":        hostOs,
	"LOCAL_RESOURCE_DIR":          localizePathList("resource_dirs"),
	"LOCAL_SANITIZE":              sanitize(""),
	"LOCAL_SANITIZE_DIAG":         sanitize("diag."),
	"LOCAL_STRIP_MODULE":          strip(),
	"LOCAL_CFLAGS":                cflags,
	"LOCAL_UNINSTALLABLE_MODULE":  invert("installable"),
	"LOCAL_PROGUARD_ENABLED":      proguardEnabled,
	"LOCAL_MODULE_PATH":           prebuiltModulePath,

# Module Comment
include $(CLEAR_VARS)
# Name Comment
LOCAL_MODULE := test
# Source comment
LOCAL_SRC_FILES_EXCLUDE := a.c
# Second source comment
LOCAL_SRC_FILES_EXCLUDE += b.c
include $(BUILD_SHARED_LIBRARY)`,
		expected: `
//
// Copyright
//

// Module Comment
cc_library_shared {
    // Name Comment
    name: "test",
    // Source comment
    exclude_srcs: ["a.c"] + ["b.c"], // Second source comment

}`,
	},
	{
		desc: "split local/global include_dirs (1)",
		in: `
include $(CLEAR_VARS)
LOCAL_C_INCLUDES := $(LOCAL_PATH)
include $(BUILD_SHARED_LIBRARY)`,
		expected: `
cc_library_shared {
    local_include_dirs: ["."],
}`,
	},
	{
		desc: "split local/global include_dirs (2)",
		in: `
include $(CLEAR_VARS)
LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
include $(BUILD_SHARED_LIBRARY)`,
		expected: `
cc_library_shared {
    local_include_dirs: ["include"],
}`,
	},
	{
		desc: "split local/global include_dirs (3)",
		in: `
include $(CLEAR_VARS)
LOCAL_C_INCLUDES := system/core/include
include $(BUILD_SHARED_LIBRARY)`,
		expected: `
cc_library_shared {
    include_dirs: ["system/core/include"],
}`,
	},
	{
		desc: "split local/global include_dirs (4)",
		in: `
input := testing/include
include $(CLEAR_VARS)
# Comment 1
LOCAL_C_INCLUDES := $(LOCAL_PATH) $(LOCAL_PATH)/include system/core/include $(input)
# Comment 2
LOCAL_C_INCLUDES += $(TOP)/system/core/include $(LOCAL_PATH)/test/include
# Comment 3
include $(BUILD_SHARED_LIBRARY)`,
		expected: `
input = ["testing/include"]
cc_library_shared {
    // Comment 1
    include_dirs: ["system/core/include"] + input + ["system/core/include"], // Comment 2
    local_include_dirs: ["."] + ["include"] + ["test/include"],
    // Comment 3
}`,
	},
	{
		desc: "Convert to local path",
		in: `
include $(CLEAR_VARS)
LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/res $(LOCAL_PATH)/res2
LOCAL_ASSET_DIR := $(LOCAL_PATH)/asset
LOCAL_JARJAR_RULES := $(LOCAL_PATH)/jarjar-rules.txt
include $(BUILD_PACKAGE)