sea: add option to disable the experimental SEA warning

Refs: nodejs/single-executable#60
Signed-off-by: Darshan Sen <raisinten@gmail.com>

doc/api/single-executable-applications.md

@@ -128,7 +128,8 @@ The configuration currently reads the following top-level fields:
 ```json
 {
   "main": "/path/to/bundled/script.js",
-  "output": "/path/to/write/the/generated/blob.blob"
+  "output": "/path/to/write/the/generated/blob.blob",
+  "disableExperimentalSEAWarning": true / false // Default: false
 }
 ```
 

lib/internal/main/embedding.js

@@ -3,15 +3,15 @@ const {
   prepareMainThreadExecution,
   markBootstrapComplete,
 } = require('internal/process/pre_execution');
-const { isSea } = internalBinding('sea');
+const { isExperimentalSeaWarningDisabled, isSea } = internalBinding('sea');
 const { emitExperimentalWarning } = require('internal/util');
 const { embedderRequire, embedderRunCjs } = require('internal/util/embedding');
 const { getEmbedderEntryFunction } = internalBinding('mksnapshot');
 
 prepareMainThreadExecution(false, true);
 markBootstrapComplete();
 
-if (isSea()) {
+if (isSea() && !isExperimentalSeaWarningDisabled()) {
   emitExperimentalWarning('Single executable application');
 }
 

src/json_parser.cc

@@ -58,7 +58,7 @@ bool JSONParser::Parse(const std::string& content) {
   return true;
 }
 
-std::optional<std::string> JSONParser::GetTopLevelField(
+std::optional<std::string> JSONParser::GetTopLevelStringField(
     const std::string& field) {
   Isolate* isolate = isolate_.get();
   Local<Context> context = context_.Get(isolate);
@@ -77,4 +77,26 @@ std::optional<std::string> JSONParser::GetTopLevelField(
   return utf8_value.ToString();
 }
 
+std::optional<bool> JSONParser::GetTopLevelBoolField(const std::string& field) {
+  Isolate* isolate = isolate_.get();
+  Local<Context> context = context_.Get(isolate);
+  Local<Object> content_object = content_.Get(isolate);
+  Local<Value> value;
+  // It's not a real script, so don't print the source line.
+  errors::PrinterTryCatch bootstrapCatch(
+      isolate, errors::PrinterTryCatch::kDontPrintSourceLine);
+  if (!content_object
+           ->Has(context, OneByteString(isolate, field.c_str(), field.length()))
+           .FromMaybe(false)) {
+    return false;
+  }
+  if (!content_object
+           ->Get(context, OneByteString(isolate, field.c_str(), field.length()))
+           .ToLocal(&value) ||
+      !value->IsBoolean()) {
+    return {};
+  }
+  return value->BooleanValue(isolate);
+}
+
 }  // namespace node

src/json_parser.h

@@ -18,7 +18,8 @@ class JSONParser {
   JSONParser();
   ~JSONParser() {}
   bool Parse(const std::string& content);
-  std::optional<std::string> GetTopLevelField(const std::string& field);
+  std::optional<std::string> GetTopLevelStringField(const std::string& field);
+  std::optional<bool> GetTopLevelBoolField(const std::string& field);
 
  private:
   // We might want a lighter-weight JSON parser for this use case. But for now

src/node_sea.cc

@@ -33,15 +33,21 @@ using v8::Value;
 namespace node {
 namespace sea {
 
+namespace {
 // A special number that will appear at the beginning of the single executable
 // preparation blobs ready to be injected into the binary. We use this to check
 // that the data given to us are intended for building single executable
 // applications.
-static const uint32_t kMagic = 0x143da20;
+const uint32_t kMagic = 0x143da20;
 
-std::string_view FindSingleExecutableCode() {
+struct SeaResource {
+  std::string_view code;
+  bool disable_experimental_sea_warning;
+};
+
+SeaResource FindSingleExecutableResource() {
   CHECK(IsSingleExecutable());
-  static const std::string_view sea_code = []() -> std::string_view {
+  static const SeaResource sea_resource = []() -> SeaResource {
     size_t size;
 #ifdef __APPLE__
     postject_options options;
@@ -55,10 +61,22 @@ std::string_view FindSingleExecutableCode() {
 #endif
     uint32_t first_word = reinterpret_cast<const uint32_t*>(code)[0];
     CHECK_EQ(first_word, kMagic);
+    bool disable_experimental_sea_warning =
+        reinterpret_cast<const bool*>(code + sizeof(first_word))[0];
     // TODO(joyeecheung): do more checks here e.g. matching the versions.
-    return {code + sizeof(first_word), size - sizeof(first_word)};
+    return {
+        {code + sizeof(first_word) + sizeof(disable_experimental_sea_warning),
+         size - sizeof(first_word) - sizeof(disable_experimental_sea_warning)},
+        disable_experimental_sea_warning};
   }();
-  return sea_code;
+  return sea_resource;
+}
+
+}  // namespace
+
+std::string_view FindSingleExecutableCode() {
+  SeaResource sea_resource = FindSingleExecutableResource();
+  return sea_resource.code;
 }
 
 bool IsSingleExecutable() {
@@ -69,6 +87,11 @@ void IsSingleExecutable(const FunctionCallbackInfo<Value>& args) {
   args.GetReturnValue().Set(IsSingleExecutable());
 }
 
+void IsExperimentalSeaWarningDisabled(const FunctionCallbackInfo<Value>& args) {
+  SeaResource sea_resource = FindSingleExecutableResource();
+  args.GetReturnValue().Set(sea_resource.disable_experimental_sea_warning);
+}
+
 std::tuple<int, char**> FixupArgsForSEA(int argc, char** argv) {
   // Repeats argv[0] at position 1 on argv as a replacement for the missing
   // entry point file path.
@@ -90,6 +113,7 @@ namespace {
 struct SeaConfig {
   std::string main_path;
   std::string output_path;
+  bool disable_experimental_sea_warning;
 };
 
 std::optional<SeaConfig> ParseSingleExecutableConfig(
@@ -112,7 +136,8 @@ std::optional<SeaConfig> ParseSingleExecutableConfig(
     return std::nullopt;
   }
 
-  result.main_path = parser.GetTopLevelField("main").value_or(std::string());
+  result.main_path =
+      parser.GetTopLevelStringField("main").value_or(std::string());
   if (result.main_path.empty()) {
     FPrintF(stderr,
             "\"main\" field of %s is not a non-empty string\n",
@@ -121,14 +146,25 @@ std::optional<SeaConfig> ParseSingleExecutableConfig(
   }
 
   result.output_path =
-      parser.GetTopLevelField("output").value_or(std::string());
+      parser.GetTopLevelStringField("output").value_or(std::string());
   if (result.output_path.empty()) {
     FPrintF(stderr,
             "\"output\" field of %s is not a non-empty string\n",
             config_path);
     return std::nullopt;
   }
 
+  std::optional<bool> disable_experimental_sea_warning =
+      parser.GetTopLevelBoolField("disableExperimentalSEAWarning");
+  if (!disable_experimental_sea_warning.has_value()) {
+    FPrintF(stderr,
+            "\"disableExperimentalSEAWarning\" field of %s is not a Boolean\n",
+            config_path);
+    return std::nullopt;
+  }
+  result.disable_experimental_sea_warning =
+      disable_experimental_sea_warning.value();
+
   return result;
 }
 
@@ -144,9 +180,17 @@ bool GenerateSingleExecutableBlob(const SeaConfig& config) {
 
   std::vector<char> sink;
   // TODO(joyeecheung): reuse the SnapshotSerializerDeserializer for this.
-  sink.reserve(sizeof(kMagic) + main_script.size());
+  sink.reserve(sizeof(kMagic) +
+               sizeof(config.disable_experimental_sea_warning) +
+               main_script.size());
   const char* pos = reinterpret_cast<const char*>(&kMagic);
   sink.insert(sink.end(), pos, pos + sizeof(kMagic));
+  const char* disable_experimental_sea_warning =
+      reinterpret_cast<const char*>(&config.disable_experimental_sea_warning);
+  sink.insert(sink.end(),
+              disable_experimental_sea_warning,
+              disable_experimental_sea_warning +
+                  sizeof(config.disable_experimental_sea_warning));
   sink.insert(
       sink.end(), main_script.data(), main_script.data() + main_script.size());
 
@@ -182,10 +226,15 @@ void Initialize(Local<Object> target,
                 Local<Context> context,
                 void* priv) {
   SetMethod(context, target, "isSea", IsSingleExecutable);
+  SetMethod(context,
+            target,
+            "isExperimentalSeaWarningDisabled",
+            IsExperimentalSeaWarningDisabled);
 }
 
 void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
   registry->Register(IsSingleExecutable);
+  registry->Register(IsExperimentalSeaWarningDisabled);
 }
 
 }  // namespace sea

test/fixtures/sea.js

@@ -3,11 +3,15 @@ const createdRequire = createRequire(__filename);
 
 // Although, require('../common') works locally, that couldn't be used here
 // because we set NODE_TEST_DIR=/Users/iojs/node-tmp on Jenkins CI.
-const { expectWarning } = createdRequire(process.env.COMMON_DIRECTORY);
-
-expectWarning('ExperimentalWarning',
-              'Single executable application is an experimental feature and ' +
-              'might change at any time');
+const { expectWarning, mustNotCall } = createdRequire(process.env.COMMON_DIRECTORY);
+
+if (createdRequire('./sea-config.json').disableExperimentalSEAWarning) {
+  process.on('warning', mustNotCall());
+} else {
+  expectWarning('ExperimentalWarning',
+                'Single executable application is an experimental feature and ' +
+                'might change at any time');
+}
 
 const { deepStrictEqual, strictEqual, throws } = require('assert');
 const { dirname } = require('path');

test/parallel/test-single-executable-application-disable-experimental-sea-warning.js

@@ -0,0 +1,125 @@
+'use strict';
+const common = require('../common');
+
+// This tests the creation of a single executable application.
+
+const fixtures = require('../common/fixtures');
+const tmpdir = require('../common/tmpdir');
+const { copyFileSync, readFileSync, writeFileSync, existsSync } = require('fs');
+const { execFileSync } = require('child_process');
+const { join } = require('path');
+const { strictEqual } = require('assert');
+const assert = require('assert');
+
+if (!process.config.variables.single_executable_application)
+  common.skip('Single Executable Application support has been disabled.');
+
+if (!['darwin', 'win32', 'linux'].includes(process.platform))
+  common.skip(`Unsupported platform ${process.platform}.`);
+
+if (process.platform === 'linux' && process.config.variables.is_debug === 1)
+  common.skip('Running the resultant binary fails with `Couldn\'t read target executable"`.');
+
+if (process.config.variables.node_shared)
+  common.skip('Running the resultant binary fails with ' +
+    '`/home/iojs/node-tmp/.tmp.2366/sea: error while loading shared libraries: ' +
+    'libnode.so.112: cannot open shared object file: No such file or directory`.');
+
+if (process.config.variables.icu_gyp_path === 'tools/icu/icu-system.gyp')
+  common.skip('Running the resultant binary fails with ' +
+    '`/home/iojs/node-tmp/.tmp.2379/sea: error while loading shared libraries: ' +
+    'libicui18n.so.71: cannot open shared object file: No such file or directory`.');
+
+if (!process.config.variables.node_use_openssl || process.config.variables.node_shared_openssl)
+  common.skip('Running the resultant binary fails with `Node.js is not compiled with OpenSSL crypto support`.');
+
+if (process.config.variables.want_separate_host_toolset !== 0)
+  common.skip('Running the resultant binary fails with `Segmentation fault (core dumped)`.');
+
+if (process.platform === 'linux') {
+  const osReleaseText = readFileSync('/etc/os-release', { encoding: 'utf-8' });
+  const isAlpine = /^NAME="Alpine Linux"/m.test(osReleaseText);
+  if (isAlpine) common.skip('Alpine Linux is not supported.');
+
+  if (process.arch === 's390x') {
+    common.skip('On s390x, postject fails with `memory access out of bounds`.');
+  }
+
+  if (process.arch === 'ppc64') {
+    common.skip('On ppc64, this test times out.');
+  }
+}
+
+const inputFile = fixtures.path('sea.js');
+const requirableFile = join(tmpdir.path, 'requirable.js');
+const configFile = join(tmpdir.path, 'sea-config.json');
+const seaPrepBlob = join(tmpdir.path, 'sea-prep.blob');
+const outputFile = join(tmpdir.path, process.platform === 'win32' ? 'sea.exe' : 'sea');
+
+tmpdir.refresh();
+
+writeFileSync(requirableFile, `
+module.exports = {
+  hello: 'world',
+};
+`);
+
+writeFileSync(configFile, `
+{
+  "main": "sea.js",
+  "output": "sea-prep.blob",
+  "disableExperimentalSEAWarning": true
+}
+`);
+
+// Copy input to working directory
+copyFileSync(inputFile, join(tmpdir.path, 'sea.js'));
+execFileSync(process.execPath, ['--experimental-sea-config', 'sea-config.json'], {
+  cwd: tmpdir.path
+});
+
+assert(existsSync(seaPrepBlob));
+
+copyFileSync(process.execPath, outputFile);
+const postjectFile = fixtures.path('postject-copy', 'node_modules', 'postject', 'dist', 'cli.js');
+execFileSync(process.execPath, [
+  postjectFile,
+  outputFile,
+  'NODE_SEA_BLOB',
+  seaPrepBlob,
+  '--sentinel-fuse', 'NODE_SEA_FUSE_fce680ab2cc467b6e072b8b5df1996b2',
+  ...process.platform === 'darwin' ? [ '--macho-segment-name', 'NODE_SEA' ] : [],
+]);
+
+if (process.platform === 'darwin') {
+  execFileSync('codesign', [ '--sign', '-', outputFile ]);
+  execFileSync('codesign', [ '--verify', outputFile ]);
+} else if (process.platform === 'win32') {
+  let signtoolFound = false;
+  try {
+    execFileSync('where', [ 'signtool' ]);
+    signtoolFound = true;
+  } catch (err) {
+    console.log(err.message);
+  }
+  if (signtoolFound) {
+    let certificatesFound = false;
+    try {
+      execFileSync('signtool', [ 'sign', '/fd', 'SHA256', outputFile ]);
+      certificatesFound = true;
+    } catch (err) {
+      if (!/SignTool Error: No certificates were found that met all the given criteria/.test(err)) {
+        throw err;
+      }
+    }
+    if (certificatesFound) {
+      execFileSync('signtool', 'verify', '/pa', 'SHA256', outputFile);
+    }
+  }
+}
+
+const singleExecutableApplicationOutput = execFileSync(
+  outputFile,
+  [ '-a', '--b=c', 'd' ],
+  { env: { COMMON_DIRECTORY: join(__dirname, '..', 'common') } });
+strictEqual(singleExecutableApplicationOutput.toString(), 'Hello, world! 😊\n');

test/parallel/test-single-executable-application.js

@@ -67,7 +67,8 @@ module.exports = {
 writeFileSync(configFile, `
 {
   "main": "sea.js",
-  "output": "sea-prep.blob"
+  "output": "sea-prep.blob",
+  "disableExperimentalSEAWarning": false
 }
 `);