如何在DTrace文件中使用Facebook BUCK？

Question

因此，如果您打开https://github.com/airbnb/BuckSample并尝试使用cocoaPods https://github.com/ReactiveCocoa/ReactiveObjC进行安装

在添加一个新的BUCK构建规则之后，如下所示

apple_third_party_lib(
    name = "ReactiveObjC",
    visibility = ["PUBLIC"],
    srcs = glob([
        "ReactiveObjC/**/*.m",
    ]),
    exported_headers = glob([
        "ReactiveObjC/**/*.h",
    ]),
    frameworks = [
        "$PLATFORM_DIR/Developer/Library/Frameworks/Foundation.framework",
    ],
)

buck build //Pods:ReactiveObjC将失败，错误如下

Pods/ReactiveObjC/ReactiveObjC/RACPassthroughSubscriber.m:12:9: fatal error: 'RACSignalProvider.h' file not found

如果我们继续下去，我们将看到RACSignalProvider.h不在Pod源文件中，但有RACSignalProvider.d，它是DTrace源文件。

当我们尝试用XCode编译它时，我们可以看到在编译实际的框架之前有一个额外的步骤

CompileDTraceScript /*user folder*/Pods/ReactiveObjC/ReactiveObjC/RACSignalProvider.d (in target 'ReactiveObjC' from project 'Pods')
    cd /*user folder*/Pods
    /usr/sbin/dtrace -h -s /*user folder*/Pods/ReactiveObjC/ReactiveObjC/RACSignalProvider.d -o /*user folder*/Library/Developer/Xcode/DerivedData/Odnoklassniki-gsukbcogkxolydbhlpglswzdhhpg/Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/ReactiveObjC.build/DerivedSources/RACSignalProvider.h

这在我们运行buck build时是不会发生的

配置中是否缺少某些内容？或者这只是BUCK不支持的？

Answer 1

所以答案是，您需要使用genrule()来处理您的DTrace文件，它应该是这样的

genrule(
    name = "ReactiveObjC_DTrace",
    srcs = [
        "ReactiveObjC/ReactiveObjC/RACSignalProvider.d",
        "ReactiveObjC/ReactiveObjC/RACCompoundDisposableProvider.d",
    ],
    bash = 
"""
    mkdir -p $OUT
    /usr/sbin/dtrace -h -s $SRCDIR/ReactiveObjC/ReactiveObjC/RACSignalProvider.d -o $OUT/RACSignalProvider.h
    /usr/sbin/dtrace -h -s $SRCDIR/ReactiveObjC/ReactiveObjC/RACCompoundDisposableProvider.d -o $OUT/RACCompoundDisposableProvider.h
""",
    out = "ReactiveObjC_DTrace",
    visibility = ["PUBLIC"]
)

然后修改您的ReactiveObjC规则，使其如下所示

apple_third_party_lib(
    name = "ReactiveObjC",
    visibility = ["PUBLIC"],
    srcs = glob([
        "ReactiveObjC/**/*.m",
    ]),
    deps = [ 
        "//Pods:ReactiveObjC_DTrace",
    ],
    exported_headers = glob([
        "ReactiveObjC/**/*.h",
        "$(location :ReactiveObjC_DTrace)/**/*.h"
    ]),
    frameworks = [
        "$PLATFORM_DIR/Developer/Library/Frameworks/Foundation.framework",
    ],
)