src: clarify OptionEnvvarSettings members

The term `Environment` in `kAllowedInEnvironment` and
`kDisallowedInEnvironment` has nothing to do with the commonly used
term `node::Environment`. Rename the member to `kAllowedInEnvvar` and
`kDisallowedInEnvvar` respectively to reflect they are options of
`OptionEnvvarSettings`.

As `OptionEnvvarSettings` is part of the public embedder APIs, the
legacy names are still preserved.

src/node.cc

@@ -769,15 +769,15 @@ static ExitCode InitializeNodeWithArgsInternal(
       env_argv.insert(env_argv.begin(), argv->at(0));
 
       const ExitCode exit_code = ProcessGlobalArgsInternal(
-          &env_argv, nullptr, errors, kAllowedInEnvironment);
+          &env_argv, nullptr, errors, kAllowedInEnvvar);
       if (exit_code != ExitCode::kNoFailure) return exit_code;
     }
   }
 #endif
 
   if (!(flags & ProcessInitializationFlags::kDisableCLIOptions)) {
-    const ExitCode exit_code = ProcessGlobalArgsInternal(
-        argv, exec_argv, errors, kDisallowedInEnvironment);
+    const ExitCode exit_code =
+        ProcessGlobalArgsInternal(argv, exec_argv, errors, kDisallowedInEnvvar);
     if (exit_code != ExitCode::kNoFailure) return exit_code;
   }
 

src/node.h

@@ -349,8 +349,12 @@ inline std::unique_ptr<InitializationResult> InitializeOncePerProcess(
 }
 
 enum OptionEnvvarSettings {
-  kAllowedInEnvironment,
-  kDisallowedInEnvironment
+  kAllowedInEnvvar = 0,
+  kDisallowedInEnvvar = 1,
+  // Deprecated, use kAllowedInEnvvar instead.
+  kAllowedInEnvironment = kAllowedInEnvvar,
+  // Deprecated, use kDisallowedInEnvvar instead.
+  kDisallowedInEnvironment = kDisallowedInEnvvar,
 };
 
 NODE_EXTERN int ProcessGlobalArgs(std::vector<std::string>* args,

src/node_options-inl.h

@@ -302,7 +302,7 @@ void OptionsParser<Options>::Parse(
     const std::string arg = args.pop_first();
 
     if (arg == "--") {
-      if (required_env_settings == kAllowedInEnvironment)
+      if (required_env_settings == kAllowedInEnvvar)
         errors->push_back(NotAllowedInEnvErr("--"));
       break;
     }
@@ -374,8 +374,8 @@ void OptionsParser<Options>::Parse(
     auto it = options_.find(name);
 
     if ((it == options_.end() ||
-         it->second.env_setting == kDisallowedInEnvironment) &&
-        required_env_settings == kAllowedInEnvironment) {
+         it->second.env_setting == kDisallowedInEnvvar) &&
+        required_env_settings == kAllowedInEnvvar) {
       errors->push_back(NotAllowedInEnvErr(original_name));
       break;
     }