intl: Add more versions from ICU

* Adds process.versions.cldr, .tz, and .unicode
* Changes how process.versions.icu is loaded
* Lazy loads the process.versions.* values for these
* add an exception to util.js
   to cause 'node -p process.versions' to still work
* update process.version docs

Fixes: #9237

Author: srl295

doc/api/process.md

@@ -1643,8 +1643,10 @@ Will generate output similar to:
   ares: '1.10.0-DEV',
   modules: '43',
   icu: '55.1',
-  openssl: '1.0.1k'
-}
+  openssl: '1.0.1k',
+  unicode: '8.0',
+  cldr: '29.0',
+  tz: '2016b' }
 ```
 
 ## Exit Codes

lib/internal/bootstrap_node.js

@@ -26,6 +26,8 @@
     // do this good and early, since it handles errors.
     setupProcessFatal();
 
+    setupProcessICUVersions();
+
     setupGlobalVariables();
     if (!process._noBrowserGlobals) {
       setupGlobalTimeouts();
@@ -304,6 +306,36 @@
     };
   }
 
+  function setupProcessICUVersions() {
+    const icu = process.binding('config').hasIntl ?
+      process.binding('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(',');
+    versionTypes.forEach((name) => {
+      // Copied from module.js:addBuiltinLibsToObject
+      Object.defineProperty(process.versions, name, {
+        configurable: true,
+        enumerable: true,
+        get: () => {
+          // With an argument, getVersion(type) returns
+          // the actual version string.
+          const version = icu.getVersion(name);
+          // Replace the current getter with a new
+          // property.
+          delete process.versions[name];
+          Object.defineProperty(process.versions, name, {
+            value: version,
+            writable: false,
+            enumerable: true
+          });
+          return version;
+        }
+      });
+    });
+  }
+
   function tryGetCwd(path) {
     var threw = true;
     var cwd;

lib/util.js

@@ -1049,3 +1049,7 @@ exports._exceptionWithHostPort = function(err,
   }
   return ex;
 };
+
+// process.versions needs a custom function as some values are lazy-evaluated.
+process.versions[exports.inspect.custom] =
+  (depth) => exports.format(JSON.parse(JSON.stringify(process.versions)));

src/node.cc

@@ -3032,9 +3032,7 @@ void SetupProcessObject(Environment* env,
                     FIXED_ONE_BYTE_STRING(env->isolate(), ARES_VERSION_STR));
 
 #if defined(NODE_HAVE_I18N_SUPPORT) && defined(U_ICU_VERSION)
-  READONLY_PROPERTY(versions,
-                    "icu",
-                    OneByteString(env->isolate(), U_ICU_VERSION));
+  // ICU-related versions are now handled on the js side, see bootstrap_node.js
 
   if (icu_data_dir != nullptr) {
     // Did the user attempt (via env var or parameter) to set an ICU path?

src/node_i18n.cc

@@ -31,14 +31,18 @@
 #include "util-inl.h"
 #include "v8.h"
 
+#include <unicode/utypes.h>
 #include <unicode/putil.h>
 #include <unicode/uchar.h>
 #include <unicode/udata.h>
 #include <unicode/uidna.h>
-#include <unicode/utypes.h>
 #include <unicode/ucnv.h>
 #include <unicode/utf8.h>
 #include <unicode/utf16.h>
+#include <unicode/timezone.h>
+#include <unicode/ulocdata.h>
+#include <unicode/uvernum.h>
+#include <unicode/uversion.h>
 
 #ifdef NODE_HAVE_SMALL_ICU
 /* if this is defined, we have a 'secondary' entry point.
@@ -339,6 +343,67 @@ static void ICUErrorName(const FunctionCallbackInfo<Value>& args) {
                           v8::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.
+ */
+static 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 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;
+}
+
+static 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));
+  } 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));
+    }
+  }
+}
+
 bool InitializeICUDirectory(const char* icu_data_path) {
   if (icu_data_path != nullptr) {
     flag_icu_data_dir = true;
@@ -558,6 +623,7 @@ void Init(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);

test/parallel/test-process-versions.js

@@ -11,6 +11,9 @@ if (common.hasCrypto) {
 
 if (common.hasIntl) {
   expected_keys.push('icu');
+  expected_keys.push('cldr');
+  expected_keys.push('tz');
+  expected_keys.push('unicode');
 }
 
 expected_keys.sort();