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feat(lambda-go): allow configuration of GOPROXY (aws#23171)
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We used to require direct Go package access, because Go proxies may be blocked by corporate network policies (and wouldn't you know it, it actually is at our particular workplace 🙃).

This produces a good bit of instability in our CI builds though, as `gopkg.in` website which is used to reference some of our transitive dependencies is regularly experiencing downtime.

Make Go proxies configurable and switch them back on in CI builds.


----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*
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rix0rrr authored and Brennan Ho committed Dec 9, 2022
1 parent b16aae3 commit ebde4a6
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13 changes: 13 additions & 0 deletions packages/@aws-cdk/aws-lambda-go/README.md
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Expand Up @@ -170,6 +170,19 @@ new go.GoFunction(this, 'handler', {
});
```

By default this construct doesn't use any Go module proxies. This is contrary to
a standard Go installation, which would use the Google proxy by default. To
recreate that behavior, do the following:

```ts
new go.GoFunction(this, 'GoFunction', {
entry: 'app/cmd/api',
bundling: {
goProxies: [go.GoFunction.GOOGLE_GOPROXY, 'direct'],
},
});
```

## Command hooks

It is possible to run additional commands by specifying the `commandHooks` prop:
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6 changes: 5 additions & 1 deletion packages/@aws-cdk/aws-lambda-go/lib/bundling.ts
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Expand Up @@ -106,14 +106,18 @@ export class Bundling implements cdk.BundlingOptions {

const cgoEnabled = props.cgoEnabled ? '1' : '0';

const environment = {
const environment: Record<string, string> = {
CGO_ENABLED: cgoEnabled,
GO111MODULE: 'on',
GOARCH: props.architecture.dockerPlatform.split('/')[1],
GOOS: 'linux',
...props.environment,
};

if (props.goProxies) {
environment.GOPROXY = props.goProxies.join(',');
}

// Docker bundling
const shouldBuildImage = props.forcedDockerBundling || !Bundling.runsLocally;
this.image = shouldBuildImage
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5 changes: 5 additions & 0 deletions packages/@aws-cdk/aws-lambda-go/lib/function.ts
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Expand Up @@ -71,6 +71,11 @@ export interface GoFunctionProps extends lambda.FunctionOptions {
* A Golang Lambda function
*/
export class GoFunction extends lambda.Function {
/**
* The address of the Google Go proxy
*/
public static readonly GOOGLE_GOPROXY = 'https://proxy.golang.org';

constructor(scope: Construct, id: string, props: GoFunctionProps) {
if (props.runtime && (props.runtime.family !== lambda.RuntimeFamily.GO && props.runtime.family != lambda.RuntimeFamily.OTHER)) {
throw new Error('Only `go` and `provided` runtimes are supported.');
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22 changes: 22 additions & 0 deletions packages/@aws-cdk/aws-lambda-go/lib/types.ts
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Expand Up @@ -96,6 +96,28 @@ export interface BundlingOptions {
* @default - false
*/
readonly cgoEnabled?: boolean;

/**
* What Go proxies to use to fetch the packages involved in the build
*
* Pass a list of proxy addresses in order, and/or the string `'direct'` to
* attempt direct access.
*
* By default this construct uses no proxies, but a standard Go install would
* use the Google proxy by default. To recreate that behavior, do the following:
*
* ```ts
* new go.GoFunction(this, 'GoFunction', {
* entry: 'app/cmd/api',
* bundling: {
* goProxies: [go.GoFunction.GOOGLE_GOPROXY, 'direct'],
* },
* });
* ```
*
* @default - Direct access
*/
readonly goProxies?: string[];
}

/**
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Expand Up @@ -20,6 +20,8 @@ if (process.env.PACKAGE_LAYOUT_VERSION === '1') {
var { RetentionDays } = require('aws-cdk-lib/aws-logs');
}

const isRunningOnCodeBuild = !!process.env.CODEBUILD_BUILD_ID;

class CDKSupportDemoRootStack extends Stack{
constructor(scope, id, props) {
super(scope, id, props);
Expand Down Expand Up @@ -99,6 +101,8 @@ class CDKSupportDemoRootStack extends Stack{
entry: './src/go/GoFunctionConstruct',
bundling: {
forcedDockerBundling: true,
// Only use Google proxy in the CI tests, as it is blocked on workstations
goProxies: isRunningOnCodeBuild ? [GoFunction.GOOGLE_GOPROXY, 'direct'] : undefined,
},
});

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