用hermes构建应用程序错误：“.”不能被识别为内部或外部命令。

Question

• Building - Windows 10.

上的本机应用程序

• The错误是为 node_modules\react-native\react.gradle

的第165行打印的

“.”不能识别为内部或外部命令、可操作的程序或批处理文件。

exec**:** 165是下面的第5行，从开始

if (enableHermes) {
                doLast {
                    def hermesFlags;
                    def hbcTempFile = file("${jsBundleFile}.hbc")
                    exec {
                        if (targetName.toLowerCase().contains("release")) {
                            // Can't use ?: since that will also substitute valid empty lists
                            hermesFlags = config.hermesFlagsRelease
                            if (hermesFlags == null) hermesFlags = ["-O", "-output-source-map"]
                        } else {
                            hermesFlags = config.hermesFlagsDebug
                            if (hermesFlags == null) hermesFlags = []
                        }

                        if (Os.isFamily(Os.FAMILY_WINDOWS)) {
                            commandLine("cmd", "/c", getHermesCommand(), "-emit-binary", "-out", hbcTempFile, jsBundleFile, *hermesFlags)
                        } else {
                            commandLine(getHermesCommand(), "-emit-binary", "-out", hbcTempFile, jsBundleFile, *hermesFlags)
                        }
                    }
                    ant.move(
                        file: hbcTempFile,
                        toFile: jsBundleFile
                    );
                    if (hermesFlags.contains("-output-source-map")) {
                        ant.move(
                            // Hermes will generate a source map with this exact name
                            file: "${jsBundleFile}.hbc.map",
                            tofile: jsCompilerSourceMapFile
                        );
                        exec {
                            // TODO: set task dependencies for caching

                            // Set up the call to the compose-source-maps script
                            workingDir(reactRoot)
                            if (Os.isFamily(Os.FAMILY_WINDOWS)) {
                                commandLine("cmd", "/c", *nodeExecutableAndArgs, composeSourceMapsPath, jsPackagerSourceMapFile, jsCompilerSourceMapFile, "-o", jsOutputSourceMapFile)
                            } else {
                                commandLine(*nodeExecutableAndArgs, composeSourceMapsPath, jsPackagerSourceMapFile, jsCompilerSourceMapFile, "-o", jsOutputSourceMapFile)
                            }
                        }
                    }
                }
            }

这里是android/app/build.gradle中hermescommand的定义：

project.ext.react = [
    enableHermes: true,  // clean and rebuild if changing
    // next added by Yossi
    hermesCommand: "../../node_modules/hermesengine/win64-bin/hermes",
    extraPackagerArgs: ["--sourcemap-output", "$buildDir/intermediates/assets/release/index.android.bundle.map"]
]

据我所知，指向以下文件：

node_modules\hermes-engine\win64-bin\hermes.exe

有什么想法吗？

在android/app/build.gradle中的最新定义(如下所示)：

project.ext.react = [
    enableHermes: true,  // clean and rebuild if changing
    // -either- hermesCommand: "..\\..\\node_modules\\hermesengine\\win64-bin\\hermes",
    // -or- hermesCommand: "../../node_modules/hermesengine/%OS-BIN%/hermes",
    hermesCommand: "../../node_modules/hermesengine/%OS-BIN%/hermes",
    extraPackagerArgs: ["--sourcemap-output", "$buildDir/intermediates/assets/release/index.android.bundle.map"]
]

更改后的生成输出如下：

> Task :app:bundleReleaseJsAndAssets
warning: the transform cache was reset.
                 Welcome to React Native!
                Learn once, write anywhere


info Writing bundle output to:, C:\esites-grocery\test1\plumpclient\android\app\build\generated\assets\react\release\index.android.bundle
info Writing sourcemap output to:, C:\esites-grocery\test1\plumpclient\android\app\build/intermediates/assets/release/index.android.bundle.map
info Done writing bundle output
info Done writing sourcemap output
info Copying 141 asset files
info Done copying assets
The system cannot find the path specified.

> Task :app:bundleReleaseJsAndAssets FAILED

> Task :app:bundleReleaseJsAndAssets_SentryUpload_3001
Processing react-native sourcemaps for Sentry upload.
> Analyzing 2 sources
> Rewriting sources
> Adding source map references
Uploading sourcemaps for release com.plumpplum@RN62 Hermes+3001 distribution 3001
> Bundled 2 files for upload
> Uploaded release files to Sentry
> File upload complete

Source Map Upload Report
  Minified Scripts
    ~/index.android.bundle (sourcemap at index.android.bundle.map)
  Source Maps
    ~/index.android.bundle.map

> Task :app:bundleReleaseJsAndAssets_SentryUpload_1001
Processing react-native sourcemaps for Sentry upload.
> Analyzing 2 sources
> Rewriting sources
> Adding source map references
Uploading sourcemaps for release com.plumpplum@RN62 Hermes+1001 distribution 1001
> Bundled 2 files for upload
> Uploaded release files to Sentry
> File upload complete

Source Map Upload Report
  Minified Scripts
    ~/index.android.bundle (sourcemap at index.android.bundle.map)
  Source Maps
    ~/index.android.bundle.map

> Task :app:bundleReleaseJsAndAssets_SentryUpload_2001
Processing react-native sourcemaps for Sentry upload.
> Analyzing 2 sources
> Rewriting sources
> Adding source map references
Uploading sourcemaps for release com.plumpplum@RN62 Hermes+2001 distribution 2001
> Bundled 2 files for upload
> Uploaded release files to Sentry
> File upload complete

Source Map Upload Report
  Minified Scripts
    ~/index.android.bundle (sourcemap at index.android.bundle.map)
  Source Maps
    ~/index.android.bundle.map

> Task :app:bundleReleaseJsAndAssets_SentryUpload_4001
Processing react-native sourcemaps for Sentry upload.
> Analyzing 2 sources
> Rewriting sources
> Adding source map references
Uploading sourcemaps for release com.plumpplum@RN62 Hermes+4001 distribution 4001
> Bundled 2 files for upload
> Uploaded release files to Sentry
> File upload complete

Source Map Upload Report
  Minified Scripts
    ~/index.android.bundle (sourcemap at index.android.bundle.map)
  Source Maps
    ~/index.android.bundle.map

FAILURE: Build failed with an exception.

* Where:
Script 'C:\esites-grocery\test1\plumpclient\node_modules\react-native\react.gradle' line: 165

* What went wrong:
Execution failed for task ':app:bundleReleaseJsAndAssets'.
> Process 'command 'cmd'' finished with non-zero exit value 1

Answer 1

以下是react.gradle的更多内容

def getHermesCommand = {
    // If the project specifies a Hermes command, don't second guess it.
    if (!hermesCommand.contains("%OS-BIN%")) {
        return hermesCommand
    }

    // Execution on Windows fails with / as separator
    return hermesCommand
            .replaceAll("%OS-BIN%", getHermesOSBin())
            .replace('/' as char, File.separatorChar);
}

您正在指定../../node_modules/hermesengine/win64-bin/hermes作为路径，这是特定于OS的路径(通过没有OS占位符来确定)。

因此，根据注释，react.gradle不会事后猜测您的路径，而只是直接将其传递给OS命令解释器。

这是因为命令解释器不允许/作为目录分隔符而失败。

要么指定对系统有效的路径：

hermesCommand: "..\\..\\node_modules\\hermesengine\\win64-bin\\hermes",

或者指定一个独立于操作系统的路径，让react.gradle为每个平台转换它：

hermesCommand: "../../node_modules/hermesengine/%OS-BIN%/hermes",