GetPartition

using Pulumi;
using Aws = Pulumi.Aws;

class MyStack : Stack
{
    public MyStack()
    {
        var current = Output.Create(Aws.GetPartition.InvokeAsync());
        var s3Policy = current.Apply(current => Output.Create(Aws.Iam.GetPolicyDocument.InvokeAsync(new Aws.Iam.GetPolicyDocumentArgs
        {
            Statements = 
            {
                new Aws.Iam.Inputs.GetPolicyDocumentStatementArgs
                {
                    Actions = 
                    {
                        "s3:ListBucket",
                    },
                    Resources = 
                    {
                        $"arn:{current.Partition}:s3:::my-bucket",
                    },
                    Sid = "1",
                },
            },
        })));
    }

}

package main

import (
    "fmt"

    "github.com/pulumi/pulumi-aws/sdk/v2/go/aws"
    "github.com/pulumi/pulumi-aws/sdk/v2/go/aws/iam"
    "github.com/pulumi/pulumi/sdk/v2/go/pulumi"
)

func main() {
    pulumi.Run(func(ctx *pulumi.Context) error {
        current, err := aws.GetPartition(ctx, nil, nil)
        if err != nil {
            return err
        }
        _, err = iam.GetPolicyDocument(ctx, &iam.GetPolicyDocumentArgs{
            Statements: []iam.GetPolicyDocumentStatement{
                iam.GetPolicyDocumentStatement{
                    Actions: []string{
                        "s3:ListBucket",
                    },
                    Resources: []string{
                        fmt.Sprintf("%v%v%v", "arn:", current.Partition, ":s3:::my-bucket"),
                    },
                    Sid: "1",
                },
            },
        }, nil)
        if err != nil {
            return err
        }
        return nil
    })
}

import pulumi
import pulumi_aws as aws

current = aws.get_partition()
s3_policy = aws.iam.get_policy_document(statements=[{
    "actions": ["s3:ListBucket"],
    "resources": [f"arn:{current.partition}:s3:::my-bucket"],
    "sid": "1",
}])

import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";

const current = pulumi.output(aws.getPartition({ async: true }));
const s3Policy = current.apply(current => aws.iam.getPolicyDocument({
    statements: [{
        actions: ["s3:ListBucket"],
        resources: [`arn:${current.partition}:s3:::my-bucket`],
        sid: "1",
    }],
}, { async: true }));