docs: add list clusters sample code

Signed-off-by: Tyler Gillson <[email protected]>

README.md

@@ -1,9 +1,9 @@
 # palette-sdk-go
+
 Palette SDK for the Go programming language.
 
-See [terraform-provider-spectrocloud](https://github.com/spectrocloud/terraform-provider-spectrocloud) for example usage.
+## Usage
 
-# Usage
 A project-scoped client can be instantiated as follows:
 
 ```go
@@ -15,19 +15,25 @@ pc := client.New(
 ```
 
 Switch from a project-scoped client to a tenant-scoped client:
+
 ```go
 client.WithScopeTenant()(pc)
 ```
 Note that the above will only succeed if original client's credentials are associated with a user who is authorized as a tenant administrator.
 
 Switch from a tenant-scoped client to a project-scoped client - or from one project to another:
+
 ```go
 client.WithScopeProject(projectUid)(pc)
 ```
 
-Refer to [client.go](client/client.go) for all possible client configuration options.
+### Next Steps
+- Refer to the [examples](examples/) to get started quickly.
+- Refer to [client.go](client/client.go) for all possible client configuration options.
+- Refer to [terraform-provider-spectrocloud](https://github.com/spectrocloud/terraform-provider-spectrocloud) for additional usage examples.
 
 # Contributing
+
 All contributions are welcome! Feel free to reach out on the [Spectro Cloud community Slack](https://spectrocloudcommunity.slack.com/join/shared_invite/zt-g8gfzrhf-cKavsGD_myOh30K24pImLA#/shared-invite/email).
 
 Make sure `pre-commit` is [installed](https://pre-commit.com#install).

examples/list_clusters.go

@@ -0,0 +1,64 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spectrocloud/palette-api-go/models"
+	"github.com/spectrocloud/palette-sdk-go/client"
+)
+
+func main() {
+	var host, apiKey, projectUid, scope string
+
+	// Parse command line arguments
+
+	numArgs := len(os.Args)
+	if numArgs < 3 || numArgs > 4 {
+		fmt.Println("Usage: main <host> <apiKey> [projectUid]")
+		os.Exit(1)
+	}
+	switch numArgs {
+	case 3:
+		host, apiKey = os.Args[1], os.Args[2]
+		scope = "tenant"
+	case 4:
+		host, apiKey, projectUid = os.Args[1], os.Args[2], os.Args[3]
+		scope = "project"
+	}
+
+	// Initialize a Palette client
+
+	pc := client.New(
+		client.WithPaletteURI(host),
+		client.WithAPIKey(apiKey),
+	)
+	if projectUid != "" {
+		client.WithScopeProject(projectUid)(pc)
+	} else {
+		client.WithScopeTenant()(pc)
+	}
+
+	// Search for clusters
+
+	fmt.Printf("Searching for Palette clusters with %s scope...\n", scope)
+
+	clusters, err := pc.SearchClusterSummaries(&models.V1SearchFilterSpec{}, []*models.V1SearchFilterSortSpec{})
+	if err != nil {
+		panic(err)
+	}
+
+	// Display the results
+
+	if len(clusters) == 0 {
+		fmt.Println("\nNo clusters found.")
+		return
+	}
+
+	fmt.Printf("\nFound %d cluster(s):\n", len(clusters))
+	for _, cluster := range clusters {
+		fmt.Printf("\nName: %s\n", cluster.Metadata.Name)
+		fmt.Printf("  Cloud Type: %s\n", cluster.SpecSummary.CloudConfig.CloudType)
+		fmt.Printf("  Project: %s\n", cluster.SpecSummary.ProjectMeta.Name)
+	}
+}