Manage GCP Source Repository IAM Policies

The gcp:sourcerepo/repositoryIamPolicy:RepositoryIamPolicy resource, part of the Pulumi GCP provider, manages IAM access control for Cloud Source Repositories. Three related resources serve different use cases: RepositoryIamPolicy replaces the entire policy authoritatively, RepositoryIamBinding manages all members for a specific role, and RepositoryIamMember adds individual members non-authoritatively. This guide focuses on three capabilities: authoritative policy replacement, role-based member binding, and incremental member addition.

These resources reference an existing Cloud Source Repositories repository. RepositoryIamPolicy cannot be used with RepositoryIamBinding or RepositoryIamMember, as they conflict over policy ownership. RepositoryIamBinding and RepositoryIamMember can coexist if they manage different roles. The examples are intentionally small. Combine them with your own repository and member identities.

Replace the entire IAM policy authoritatively

When you need complete control over repository access, RepositoryIamPolicy replaces the entire IAM policy with your specified bindings, ensuring no unexpected permissions remain.

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

const admin = gcp.organizations.getIAMPolicy({
    bindings: [{
        role: "roles/viewer",
        members: ["user:jane@example.com"],
    }],
});
const policy = new gcp.sourcerepo.RepositoryIamPolicy("policy", {
    project: my_repo.project,
    repository: my_repo.name,
    policyData: admin.then(admin => admin.policyData),
});

import pulumi
import pulumi_gcp as gcp

admin = gcp.organizations.get_iam_policy(bindings=[{
    "role": "roles/viewer",
    "members": ["user:jane@example.com"],
}])
policy = gcp.sourcerepo.RepositoryIamPolicy("policy",
    project=my_repo["project"],
    repository=my_repo["name"],
    policy_data=admin.policy_data)

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/organizations"
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/sourcerepo"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		admin, err := organizations.LookupIAMPolicy(ctx, &organizations.LookupIAMPolicyArgs{
			Bindings: []organizations.GetIAMPolicyBinding{
				{
					Role: "roles/viewer",
					Members: []string{
						"user:jane@example.com",
					},
				},
			},
		}, nil)
		if err != nil {
			return err
		}
		_, err = sourcerepo.NewRepositoryIamPolicy(ctx, "policy", &sourcerepo.RepositoryIamPolicyArgs{
			Project:    pulumi.Any(my_repo.Project),
			Repository: pulumi.Any(my_repo.Name),
			PolicyData: pulumi.String(admin.PolicyData),
		})
		if err != nil {
			return err
		}
		return nil
	})
}

using System.Collections.Generic;
using System.Linq;
using Pulumi;
using Gcp = Pulumi.Gcp;

return await Deployment.RunAsync(() => 
{
    var admin = Gcp.Organizations.GetIAMPolicy.Invoke(new()
    {
        Bindings = new[]
        {
            new Gcp.Organizations.Inputs.GetIAMPolicyBindingInputArgs
            {
                Role = "roles/viewer",
                Members = new[]
                {
                    "user:jane@example.com",
                },
            },
        },
    });

    var policy = new Gcp.SourceRepo.RepositoryIamPolicy("policy", new()
    {
        Project = my_repo.Project,
        Repository = my_repo.Name,
        PolicyData = admin.Apply(getIAMPolicyResult => getIAMPolicyResult.PolicyData),
    });

});

package generated_program;

import com.pulumi.Context;
import com.pulumi.Pulumi;
import com.pulumi.core.Output;
import com.pulumi.gcp.organizations.OrganizationsFunctions;
import com.pulumi.gcp.organizations.inputs.GetIAMPolicyArgs;
import com.pulumi.gcp.sourcerepo.RepositoryIamPolicy;
import com.pulumi.gcp.sourcerepo.RepositoryIamPolicyArgs;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;

public class App {
    public static void main(String[] args) {
        Pulumi.run(App::stack);
    }

    public static void stack(Context ctx) {
        final var admin = OrganizationsFunctions.getIAMPolicy(GetIAMPolicyArgs.builder()
            .bindings(GetIAMPolicyBindingArgs.builder()
                .role("roles/viewer")
                .members("user:jane@example.com")
                .build())
            .build());

        var policy = new RepositoryIamPolicy("policy", RepositoryIamPolicyArgs.builder()
            .project(my_repo.project())
            .repository(my_repo.name())
            .policyData(admin.policyData())
            .build());

    }
}

resources:
  policy:
    type: gcp:sourcerepo:RepositoryIamPolicy
    properties:
      project: ${["my-repo"].project}
      repository: ${["my-repo"].name}
      policyData: ${admin.policyData}
variables:
  admin:
    fn::invoke:
      function: gcp:organizations:getIAMPolicy
      arguments:
        bindings:
          - role: roles/viewer
            members:
              - user:jane@example.com

The policyData property accepts output from getIAMPolicy, which defines role-to-member bindings. RepositoryIamPolicy is authoritative: it removes any existing bindings not specified in policyData. Use this when you want to guarantee the exact set of permissions on a repository.

Grant a role to multiple members at once

When multiple users or service accounts need the same access level, RepositoryIamBinding manages all members for a specific role together.

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

const binding = new gcp.sourcerepo.RepositoryIamBinding("binding", {
    project: my_repo.project,
    repository: my_repo.name,
    role: "roles/viewer",
    members: ["user:jane@example.com"],
});

import pulumi
import pulumi_gcp as gcp

binding = gcp.sourcerepo.RepositoryIamBinding("binding",
    project=my_repo["project"],
    repository=my_repo["name"],
    role="roles/viewer",
    members=["user:jane@example.com"])

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/sourcerepo"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := sourcerepo.NewRepositoryIamBinding(ctx, "binding", &sourcerepo.RepositoryIamBindingArgs{
			Project:    pulumi.Any(my_repo.Project),
			Repository: pulumi.Any(my_repo.Name),
			Role:       pulumi.String("roles/viewer"),
			Members: pulumi.StringArray{
				pulumi.String("user:jane@example.com"),
			},
		})
		if err != nil {
			return err
		}
		return nil
	})
}

using System.Collections.Generic;
using System.Linq;
using Pulumi;
using Gcp = Pulumi.Gcp;

return await Deployment.RunAsync(() => 
{
    var binding = new Gcp.SourceRepo.RepositoryIamBinding("binding", new()
    {
        Project = my_repo.Project,
        Repository = my_repo.Name,
        Role = "roles/viewer",
        Members = new[]
        {
            "user:jane@example.com",
        },
    });

});

package generated_program;

import com.pulumi.Context;
import com.pulumi.Pulumi;
import com.pulumi.core.Output;
import com.pulumi.gcp.sourcerepo.RepositoryIamBinding;
import com.pulumi.gcp.sourcerepo.RepositoryIamBindingArgs;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;

public class App {
    public static void main(String[] args) {
        Pulumi.run(App::stack);
    }

    public static void stack(Context ctx) {
        var binding = new RepositoryIamBinding("binding", RepositoryIamBindingArgs.builder()
            .project(my_repo.project())
            .repository(my_repo.name())
            .role("roles/viewer")
            .members("user:jane@example.com")
            .build());

    }
}

resources:
  binding:
    type: gcp:sourcerepo:RepositoryIamBinding
    properties:
      project: ${["my-repo"].project}
      repository: ${["my-repo"].name}
      role: roles/viewer
      members:
        - user:jane@example.com

The members property lists all identities that should have the specified role. RepositoryIamBinding is authoritative for its role: it replaces all members for that role but preserves other roles in the policy. This is useful when managing team access as a group.

Add a single member to a role incrementally

When you need to grant access to one user without affecting existing permissions, RepositoryIamMember adds a single member non-authoritatively.

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

const member = new gcp.sourcerepo.RepositoryIamMember("member", {
    project: my_repo.project,
    repository: my_repo.name,
    role: "roles/viewer",
    member: "user:jane@example.com",
});

import pulumi
import pulumi_gcp as gcp

member = gcp.sourcerepo.RepositoryIamMember("member",
    project=my_repo["project"],
    repository=my_repo["name"],
    role="roles/viewer",
    member="user:jane@example.com")

package main

import (
	"github.com/pulumi/pulumi-gcp/sdk/v9/go/gcp/sourcerepo"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		_, err := sourcerepo.NewRepositoryIamMember(ctx, "member", &sourcerepo.RepositoryIamMemberArgs{
			Project:    pulumi.Any(my_repo.Project),
			Repository: pulumi.Any(my_repo.Name),
			Role:       pulumi.String("roles/viewer"),
			Member:     pulumi.String("user:jane@example.com"),
		})
		if err != nil {
			return err
		}
		return nil
	})
}

using System.Collections.Generic;
using System.Linq;
using Pulumi;
using Gcp = Pulumi.Gcp;

return await Deployment.RunAsync(() => 
{
    var member = new Gcp.SourceRepo.RepositoryIamMember("member", new()
    {
        Project = my_repo.Project,
        Repository = my_repo.Name,
        Role = "roles/viewer",
        Member = "user:jane@example.com",
    });

});

package generated_program;

import com.pulumi.Context;
import com.pulumi.Pulumi;
import com.pulumi.core.Output;
import com.pulumi.gcp.sourcerepo.RepositoryIamMember;
import com.pulumi.gcp.sourcerepo.RepositoryIamMemberArgs;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;

public class App {
    public static void main(String[] args) {
        Pulumi.run(App::stack);
    }

    public static void stack(Context ctx) {
        var member = new RepositoryIamMember("member", RepositoryIamMemberArgs.builder()
            .project(my_repo.project())
            .repository(my_repo.name())
            .role("roles/viewer")
            .member("user:jane@example.com")
            .build());

    }
}

resources:
  member:
    type: gcp:sourcerepo:RepositoryIamMember
    properties:
      project: ${["my-repo"].project}
      repository: ${["my-repo"].name}
      role: roles/viewer
      member: user:jane@example.com

The member property specifies one identity to grant the role. RepositoryIamMember is non-authoritative: it adds this member without removing other members who have the same role. Use this when you want to grant access incrementally without coordinating with other IAM configurations.

Beyond these examples

These snippets focus on specific IAM management approaches: authoritative vs non-authoritative management, role-based access control, and policy data generation. They’re intentionally minimal rather than full access control systems.

The examples reference pre-existing infrastructure such as a Cloud Source Repositories repository and a GCP project with the Source Repositories API enabled. They focus on IAM binding configuration rather than repository or project provisioning.

To keep things focused, common IAM patterns are omitted, including:

Conditional IAM bindings (condition blocks)
Custom role definitions
Service account creation and management
Multiple roles in a single configuration

These omissions are intentional: the goal is to illustrate how each IAM resource type is wired, not provide drop-in access control modules. See the Source Repository IAM Policy resource reference for all available configuration options.

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Frequently Asked Questions

Resource Selection & Conflicts

Can I mix RepositoryIamPolicy with RepositoryIamBinding or RepositoryIamMember?

No, RepositoryIamPolicy cannot be used with RepositoryIamBinding or RepositoryIamMember because they will conflict over the policy. Use only RepositoryIamPolicy OR use RepositoryIamBinding/RepositoryIamMember together.

Can I use RepositoryIamBinding and RepositoryIamMember together?

Yes, but only if they don’t grant privileges to the same role. If both resources target the same role, they will conflict.

What's the difference between RepositoryIamPolicy, RepositoryIamBinding, and RepositoryIamMember?

RepositoryIamPolicy is authoritative and replaces the entire IAM policy. RepositoryIamBinding is authoritative for a specific role, preserving other roles. RepositoryIamMember is non-authoritative, adding a single member while preserving other members for that role.

Which IAM resource should I use to add a single user without affecting existing permissions?

Use RepositoryIamMember to add a single member non-authoritatively. This preserves all existing members and roles.

Configuration & Usage

How do I generate the policyData for RepositoryIamPolicy?

Use the gcp.organizations.getIAMPolicy data source with bindings to generate policyData, then pass it to the RepositoryIamPolicy resource.

What properties are required for RepositoryIamPolicy?

Three properties are required: policyData (from gcp.organizations.getIAMPolicy), project (project ID), and repository (repository name).

What properties are immutable after creation?

Both project and repository are immutable and cannot be changed after the resource is created.

Using a different cloud?

Explore iam guides for other cloud providers:

AWS Guides Azure Guides