src: initialize ICU version in per_process::metadata.versions

Instead of

- Initialize the ICU versions in JS land after consulting
  internalBinding('config').hasIntl
- Joining the version keys in C++
- Splitting the keys in JS and call into C++ again to get the value for
  each of the keys

Do:

- Guard the initialization code behind `NODE_HAVE_I18N_SUPPORT`
- Do the initialization in C++ right after ICU data is loaded
- Initialize each version directly using ICU functions/constants,
  and put them in per_process::metadata.versions. These will be
  copied into `process.versions` naturally later.
  This way, the initialization of the versions won't be called
  in worker threads again.

PR-URL: https://github.com/nodejs/node/pull/25115
Reviewed-By: Steven R Loomis <srloomis@us.ibm.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

lib/internal/bootstrap/node.js

@@ -38,8 +38,6 @@ function startup() {
   // Do this good and early, since it handles errors.
   setupProcessFatal();
 
-  setupProcessICUVersions();
-
   setupGlobalVariables();
 
   // Bootstrappers for all threads, including worker threads and main thread
@@ -638,25 +636,6 @@ function setupProcessFatal() {
   };
 }
 
-function setupProcessICUVersions() {
-  const icu = internalBinding('config').hasIntl ?
-    internalBinding('icu') : undefined;
-  if (!icu) return;  // no Intl/ICU: nothing to add here.
-  // With no argument, getVersion() returns a comma separated list
-  // of possible types.
-  const versionTypes = icu.getVersion().split(',');
-
-  for (var n = 0; n < versionTypes.length; n++) {
-    const name = versionTypes[n];
-    const version = icu.getVersion(name);
-    Object.defineProperty(process.versions, name, {
-      writable: false,
-      enumerable: true,
-      value: version
-    });
-  }
-}
-
 function wrapForBreakOnFirstLine(source) {
   if (!process._breakFirstLine)
     return source;

src/node.cc

@@ -877,7 +877,10 @@ void SetupProcessObject(Environment* env,
   READONLY_PROPERTY(process, "versions", versions);
 
 #define V(key)                                                                 \
-  READONLY_STRING_PROPERTY(versions, #key, per_process::metadata.versions.key);
+  if (!per_process::metadata.versions.key.empty()) {                           \
+    READONLY_STRING_PROPERTY(                                                  \
+        versions, #key, per_process::metadata.versions.key);                   \
+  }
   NODE_VERSIONS_KEYS(V)
 #undef V
 
@@ -1664,6 +1667,7 @@ void Init(std::vector<std::string>* argv,
             argv->at(0).c_str());
     exit(9);
   }
+  per_process::metadata.versions.InitializeIntlVersions();
 #endif
 
   // We should set node_is_initialized here instead of in node::Start,

src/node_i18n.cc

@@ -510,67 +510,6 @@ void ICUErrorName(const FunctionCallbackInfo<Value>& args) {
                           NewStringType::kNormal).ToLocalChecked());
 }
 
-#define TYPE_ICU "icu"
-#define TYPE_UNICODE "unicode"
-#define TYPE_CLDR "cldr"
-#define TYPE_TZ "tz"
-
-/**
- * This is the workhorse function that deals with the actual version info.
- * Get an ICU version.
- * @param type the type of version to get. One of VERSION_TYPES
- * @param buf optional buffer for result
- * @param status ICU error status. If failure, assume result is undefined.
- * @return version number, or NULL. May or may not be buf.
- */
-const char* GetVersion(const char* type,
-                       char buf[U_MAX_VERSION_STRING_LENGTH],
-                       UErrorCode* status) {
-  if (!strcmp(type, TYPE_ICU)) {
-    return U_ICU_VERSION;
-  } else if (!strcmp(type, TYPE_UNICODE)) {
-    return U_UNICODE_VERSION;
-  } else if (!strcmp(type, TYPE_TZ)) {
-    return icu::TimeZone::getTZDataVersion(*status);
-  } else if (!strcmp(type, TYPE_CLDR)) {
-    UVersionInfo versionArray;
-    ulocdata_getCLDRVersion(versionArray, status);
-    if (U_SUCCESS(*status)) {
-      u_versionToString(versionArray, buf);
-      return buf;
-    }
-  }
-  // Fall through - unknown type or error case
-  return nullptr;
-}
-
-void GetVersion(const FunctionCallbackInfo<Value>& args) {
-  Environment* env = Environment::GetCurrent(args);
-  if ( args.Length() == 0 ) {
-    // With no args - return a comma-separated list of allowed values
-      args.GetReturnValue().Set(
-          String::NewFromUtf8(env->isolate(),
-            TYPE_ICU ","
-            TYPE_UNICODE ","
-            TYPE_CLDR ","
-            TYPE_TZ, NewStringType::kNormal).ToLocalChecked());
-  } else {
-    CHECK_GE(args.Length(), 1);
-    CHECK(args[0]->IsString());
-    Utf8Value val(env->isolate(), args[0]);
-    UErrorCode status = U_ZERO_ERROR;
-    char buf[U_MAX_VERSION_STRING_LENGTH] = "";  // Possible output buffer.
-    const char* versionString = GetVersion(*val, buf, &status);
-
-    if (U_SUCCESS(status) && versionString) {
-      // Success.
-      args.GetReturnValue().Set(
-          String::NewFromUtf8(env->isolate(),
-          versionString, NewStringType::kNormal).ToLocalChecked());
-    }
-  }
-}
-
 }  // anonymous namespace
 
 bool InitializeICUDirectory(const std::string& path) {
@@ -868,7 +807,6 @@ void Initialize(Local<Object> target,
   env->SetMethod(target, "toUnicode", ToUnicode);
   env->SetMethod(target, "toASCII", ToASCII);
   env->SetMethod(target, "getStringWidth", GetStringWidth);
-  env->SetMethod(target, "getVersion", GetVersion);
 
   // One-shot converters
   env->SetMethod(target, "icuErrName", ICUErrorName);

src/node_metadata.cc

@@ -11,6 +11,13 @@
 #include <openssl/opensslv.h>
 #endif  // HAVE_OPENSSL
 
+#ifdef NODE_HAVE_I18N_SUPPORT
+#include <unicode/timezone.h>
+#include <unicode/ulocdata.h>
+#include <unicode/uvernum.h>
+#include <unicode/uversion.h>
+#endif  // NODE_HAVE_I18N_SUPPORT
+
 namespace node {
 
 namespace per_process {
@@ -34,6 +41,25 @@ std::string GetOpenSSLVersion() {
 }
 #endif  // HAVE_OPENSSL
 
+#ifdef NODE_HAVE_I18N_SUPPORT
+void Metadata::Versions::InitializeIntlVersions() {
+  UErrorCode status = U_ZERO_ERROR;
+
+  const char* tz_version = icu::TimeZone::getTZDataVersion(status);
+  if (U_SUCCESS(status)) {
+    tz = tz_version;
+  }
+
+  char buf[U_MAX_VERSION_STRING_LENGTH];
+  UVersionInfo versionArray;
+  ulocdata_getCLDRVersion(versionArray, &status);
+  if (U_SUCCESS(status)) {
+    u_versionToString(versionArray, buf);
+    cldr = buf;
+  }
+}
+#endif  // NODE_HAVE_I18N_SUPPORT
+
 Metadata::Versions::Versions() {
   node = NODE_VERSION_STRING;
   v8 = v8::V8::GetVersion();
@@ -49,6 +75,11 @@ Metadata::Versions::Versions() {
 #if HAVE_OPENSSL
   openssl = GetOpenSSLVersion();
 #endif
+
+#ifdef NODE_HAVE_I18N_SUPPORT
+  icu = U_ICU_VERSION;
+  unicode = U_UNICODE_VERSION;
+#endif  // NODE_HAVE_I18N_SUPPORT
 }
 
 }  // namespace node

src/node_metadata.h

@@ -25,14 +25,38 @@ namespace node {
 #define NODE_VERSIONS_KEY_CRYPTO(V)
 #endif
 
+#ifdef NODE_HAVE_I18N_SUPPORT
+#define NODE_VERSIONS_KEY_INTL(V)                                              \
+  V(cldr)                                                                      \
+  V(icu)                                                                       \
+  V(tz)                                                                        \
+  V(unicode)
+#else
+#define NODE_VERSIONS_KEY_INTL(V)
+#endif  // NODE_HAVE_I18N_SUPPORT
+
 #define NODE_VERSIONS_KEYS(V)                                                  \
   NODE_VERSIONS_KEYS_BASE(V)                                                   \
-  NODE_VERSIONS_KEY_CRYPTO(V)
+  NODE_VERSIONS_KEY_CRYPTO(V)                                                  \
+  NODE_VERSIONS_KEY_INTL(V)
 
 class Metadata {
  public:
+  Metadata() = default;
+  Metadata(Metadata&) = delete;
+  Metadata(Metadata&&) = delete;
+  Metadata operator=(Metadata&) = delete;
+  Metadata operator=(Metadata&&) = delete;
+
   struct Versions {
     Versions();
+
+#ifdef NODE_HAVE_I18N_SUPPORT
+    // Must be called on the main thread after
+    // i18n::InitializeICUDirectory()
+    void InitializeIntlVersions();
+#endif  // NODE_HAVE_I18N_SUPPORT
+
 #define V(key) std::string key;
     NODE_VERSIONS_KEYS(V)
 #undef V