feat(experimentalIdentityAndAuth): update HttpAuthOption and HttpAuthScheme codegen

[syall]

Issue

Issue number, if available, prefixed with "#"

N/A.

Description

What does this implement/fix? Explain your changes.

After upgrading to Smithy 1.37.0
(#906), upgrade to
getEffectiveAuthSchemes using NO_AUTH_AWARE and remove redundant
code.

For HttpAuthOption, allow any auth scheme to generate the
corresponding HttpAuthOption function regardless of registering it in
codegen.

For HttpAuthScheme, reduce code duplication by looking at "inherited"
LanguageTarget platforms (e.g. REACT_NATIVE inherits from
BROWSER). httpAuthSchemes is only written in a runtimeConfig if
the IdentityProvider and Signer are different between platforms, or
if the registered HttpAuthSchemes are different. httpAuthSchemes is
always written for SHARED as a default.

For the httpAuthSchemes property on the client config interface,
update it to HttpAuthScheme[] rather than
IdentityProviderConfiguration.

Also, add @customAuth auth scheme to generic tests.

Testing

How was this change tested?

Everything is gated behind the experimentalIdentityAndAuth flag.

Observed codegen diff between the source projection and the client-identity-and-auth projection in smithy-typescript-codegen-test: https://gist.github.com/syall/03a85aa0578d37a78413d0689cdfb1ad#file-pr-907-diff

HttpAuthOption

Auth options will be generated even for unregistered auth schemes, e.g. @example.weather#customAuth in the smithy-typescript-codegen-test:

diff --color -Nur smithy-typescript-codegen-test/build/smithyprojections/smithy-typescript-codegen-test/control-experimental-identity-and-auth/typescript-codegen/src/auth/httpAuthSchemeProvider.ts smithy-typescript-codegen-test/build/smithyprojections/smithy-typescript-codegen-test/client-experimental-identity-and-auth/typescript-codegen/src/auth/httpAuthSchemeProvider.ts
--- smithy-typescript-codegen-test/build/smithyprojections/smithy-typescript-codegen-test/control-experimental-identity-and-auth/typescript-codegen/src/auth/httpAuthSchemeProvider.ts	1969-12-31 16:00:00
+++ smithy-typescript-codegen-test/build/smithyprojections/smithy-typescript-codegen-test/client-experimental-identity-and-auth/typescript-codegen/src/auth/httpAuthSchemeProvider.ts	2023-09-05 15:50:34
@@ -0,0 +1,132 @@
+
+function createExampleWeatherCustomAuthHttpAuthOption(authParameters: WeatherHttpAuthSchemeParameters): HttpAuthOption {
+  return {
+    schemeId: "example.weather#customAuth",
+  };
+};
@@ Skipping a bunch of lines @@
+    case "OnlyCustomAuth": {
+      options.push(createExampleWeatherCustomAuthHttpAuthOption(authParameters));
+      break;
+    };
+    case "OnlyCustomAuthOptional": {
+      options.push(createExampleWeatherCustomAuthHttpAuthOption(authParameters));
+      options.push(createSmithyApiNoAuthHttpAuthOption(authParameters));
+      break;
+    };

HttpAuthScheme

HttpAuthScheme now accepts IdentityProviderConfig as a parameter, and by default will try to get an identity resolver from the config abstraction:

diff --color -Nur smithy-typescript-codegen-test/build/smithyprojections/smithy-typescript-codegen-test/control-experimental-identity-and-auth/typescript-codegen/src/runtimeConfig.shared.ts smithy-typescript-codegen-test/build/smithyprojections/smithy-typescript-codegen-test/client-experimental-identity-and-auth/typescript-codegen/src/runtimeConfig.shared.ts
--- smithy-typescript-codegen-test/build/smithyprojections/smithy-typescript-codegen-test/control-experimental-identity-and-auth/typescript-codegen/src/runtimeConfig.shared.ts	2023-09-05 15:50:34
+++ smithy-typescript-codegen-test/build/smithyprojections/smithy-typescript-codegen-test/client-experimental-identity-and-auth/typescript-codegen/src/runtimeConfig.shared.ts	2023-09-05 15:50:34
@@ -1,4 +1,12 @@
 // smithy-typescript generated code
+import { defaultWeatherHttpAuthSchemeProvider } from "./auth/httpAuthSchemeProvider";
+import {
+  HttpApiKeyAuthSigner,
+  HttpBearerAuthSigner,
+  IdentityProviderConfig,
+  NoAuthSigner,
+  SigV4Signer,
+} from "@smithy/experimental-identity-and-auth";
 import { NoOpLogger } from "@smithy/smithy-client";
 import { parseUrl } from "@smithy/url-parser";
 import {
@@ -21,6 +29,28 @@
   base64Encoder: config?.base64Encoder ?? toBase64,
   disableHostPrefix: config?.disableHostPrefix ?? false,
   extensions: config?.extensions ?? [],
+  httpAuthSchemeProvider: config?.httpAuthSchemeProvider ?? defaultWeatherHttpAuthSchemeProvider,
+  httpAuthSchemes: config?.httpAuthSchemes ?? [{
+        schemeId: "aws.auth#sigv4",
+        identityProvider: (config: IdentityProviderConfig) =>
+          config.getIdentityProvider("aws.auth#sigv4"),
+        signer: new SigV4Signer(),
+      }, {
+        schemeId: "smithy.api#httpApiKeyAuth",
+        identityProvider: (config: IdentityProviderConfig) =>
+          config.getIdentityProvider("smithy.api#httpApiKeyAuth"),
+        signer: new HttpApiKeyAuthSigner(),
+      }, {
+        schemeId: "smithy.api#httpBearerAuth",
+        identityProvider: (config: IdentityProviderConfig) =>
+          config.getIdentityProvider("smithy.api#httpBearerAuth"),
+        signer: new HttpBearerAuthSigner(),
+      }, {
+        schemeId: "smithy.api#noAuth",
+        identityProvider: (config: IdentityProviderConfig) =>
+          config.getIdentityProvider("smithy.api#noAuth") || (async () => ({})),
+        signer: new NoAuthSigner(),
+      }],
   logger: config?.logger ?? new NoOpLogger(),
   sdkStreamMixin: config?.sdkStreamMixin ?? sdkStreamMixin,
   urlParser: config?.urlParser ?? parseUrl,

Additional context

Add any other context about the PR here.

N/A.

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