Add azd config options command for config discoverability

cli/azd/cmd/config.go

@@ -169,6 +169,17 @@ $ azd config set defaults.location eastus`,
 		ActionResolver: newConfigListAlphaAction,
 	})
 
+	group.Add("options", &actions.ActionDescriptorOptions{
+		Command: &cobra.Command{
+			Short: "List all available configuration settings.",
+			Long: "List all possible configuration settings that can be set with azd, " +
+				"including descriptions and allowed values.",
+		},
+		ActionResolver: newConfigOptionsAction,
+		OutputFormats:  []output.Format{output.JsonFormat, output.TableFormat},
+		DefaultFormat:  output.TableFormat,
+	})
+
 	return group
 }
 
@@ -510,3 +521,135 @@ func getCmdListAlphaHelpFooter(*cobra.Command) string {
 		),
 	})
 }
+
+// azd config options
+
+type configOptionsAction struct {
+	console       input.Console
+	formatter     output.Formatter
+	writer        io.Writer
+	configManager config.UserConfigManager
+	args          []string
+}
+
+func newConfigOptionsAction(
+	console input.Console,
+	formatter output.Formatter,
+	writer io.Writer,
+	configManager config.UserConfigManager,
+	args []string) actions.Action {
+	return &configOptionsAction{
+		console:       console,
+		formatter:     formatter,
+		writer:        writer,
+		configManager: configManager,
+		args:          args,
+	}
+}
+
+func (a *configOptionsAction) Run(ctx context.Context) (*actions.ActionResult, error) {
+	options := config.GetAllConfigOptions()
+
+	// Load current config to show current values
+	currentConfig, err := a.configManager.Load()
+	if err != nil {
+		// If config doesn't exist or can't be loaded, continue with empty config
+		currentConfig = config.NewEmptyConfig()
+	}
+
+	if a.formatter.Kind() == output.JsonFormat {
+		err := a.formatter.Format(options, a.writer, nil)
+		if err != nil {
+			return nil, fmt.Errorf("failed formatting config options: %w", err)
+		}
+		return nil, nil
+	}
+
+	// Table format
+	type tableRow struct {
+		Key           string
+		Description   string
+		Type          string
+		CurrentValue  string
+		AllowedValues string
+		EnvVar        string
+		Example       string
+	}
+
+	var rows []tableRow
+	for _, option := range options {
+		allowedValues := ""
+		if len(option.AllowedValues) > 0 {
+			allowedValues = strings.Join(option.AllowedValues, ", ")
+		}
+
+		// Get current value from config
+		currentValue := ""
+		// Skip environment-only variables (those with keys starting with "(env)")
+		if !strings.HasPrefix(option.Key, "(env)") {
+			if val, ok := currentConfig.Get(option.Key); ok {
+				// Convert value to string representation
+				switch v := val.(type) {
+				case string:
+					currentValue = v
+				case map[string]any:
+					currentValue = "<object>"
+				case []any:
+					currentValue = "<array>"
+				default:
+					currentValue = fmt.Sprintf("%v", v)
+				}
+			}
+		}
+
+		rows = append(rows, tableRow{
+			Key:           option.Key,
+			Description:   option.Description,
+			Type:          option.Type,
+			CurrentValue:  currentValue,
+			AllowedValues: allowedValues,
+			EnvVar:        option.EnvVar,
+			Example:       option.Example,
+		})
+	}
+
+	columns := []output.Column{
+		{
+			Heading:       "Key",
+			ValueTemplate: "{{.Key}}",
+		},
+		{
+			Heading:       "Description",
+			ValueTemplate: "{{.Description}}",
+		},
+		{
+			Heading:       "Type",
+			ValueTemplate: "{{.Type}}",
+		},
+		{
+			Heading:       "Current Value",
+			ValueTemplate: "{{.CurrentValue}}",
+		},
+		{
+			Heading:       "Allowed Values",
+			ValueTemplate: "{{.AllowedValues}}",
+		},
+		{
+			Heading:       "Environment Variable",
+			ValueTemplate: "{{.EnvVar}}",
+		},
+		{
+			Heading:       "Example",
+			ValueTemplate: "{{.Example}}",
+		},
+	}
+
+	err = a.formatter.Format(rows, a.writer, output.TableFormatterOptions{
+		Columns: columns,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("failed formatting config options: %w", err)
+	}
+
+	return nil, nil
+}

cli/azd/cmd/testdata/TestUsage-azd-config-options.snap

@@ -0,0 +1,16 @@
+
+List all available configuration settings.
+
+Usage
+  azd config options [flags]
+
+Global Flags
+    -C, --cwd string 	: Sets the current working directory.
+        --debug      	: Enables debugging and diagnostics logging.
+        --docs       	: Opens the documentation for azd config options in your web browser.
+    -h, --help       	: Gets help for options.
+        --no-prompt  	: Accepts the default value instead of prompting, or it fails if there is no default.
+
+Find a bug? Want to let us know how we're doing? Fill out this brief survey: https://aka.ms/azure-dev/hats.
+
+

cli/azd/cmd/testdata/TestUsage-azd-config.snap

@@ -11,6 +11,7 @@ Usage
 Available Commands
   get       	: Gets a configuration.
   list-alpha	: Display the list of available features in alpha stage.
+  options   	: List all available configuration settings.
   reset     	: Resets configuration to default.
   set       	: Sets a configuration.
   show      	: Show all the configuration values.

cli/azd/pkg/config/config_options.go

@@ -0,0 +1,35 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+package config
+
+import (
+	"log"
+
+	"github.com/azure/azure-dev/cli/azd/resources"
+	"github.com/braydonk/yaml"
+)
+
+// ConfigOption defines a configuration setting that can be set in azd config
+type ConfigOption struct {
+	Key           string   `yaml:"key"`
+	Description   string   `yaml:"description"`
+	Type          string   `yaml:"type"`
+	AllowedValues []string `yaml:"allowedValues,omitempty"`
+	Example       string   `yaml:"example,omitempty"`
+	EnvVar        string   `yaml:"envVar,omitempty"`
+}
+
+var allConfigOptions []ConfigOption
+
+func init() {
+	err := yaml.Unmarshal(resources.ConfigOptions, &allConfigOptions)
+	if err != nil {
+		log.Panicf("Can't unmarshal config options! %v", err)
+	}
+}
+
+// GetAllConfigOptions returns all available configuration options
+func GetAllConfigOptions() []ConfigOption {
+	return allConfigOptions
+}

cli/azd/pkg/config/config_options_test.go

@@ -0,0 +1,69 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+package config
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestGetAllConfigOptions(t *testing.T) {
+	options := GetAllConfigOptions()
+
+	// Should have at least some options
+	require.NotEmpty(t, options)
+	require.Greater(t, len(options), 0)
+
+	// Check that we have the expected default options
+	foundDefaultsSubscription := false
+	foundDefaultsLocation := false
+	foundAlphaAll := false
+
+	for _, option := range options {
+		require.NotEmpty(t, option.Key, "Config option key should not be empty")
+		require.NotEmpty(t, option.Description, "Config option description should not be empty")
+		require.NotEmpty(t, option.Type, "Config option type should not be empty")
+
+		switch option.Key {
+		case "defaults.subscription":
+			foundDefaultsSubscription = true
+			require.Equal(t, "string", option.Type)
+			require.Contains(t, option.Description, "subscription")
+		case "defaults.location":
+			foundDefaultsLocation = true
+			require.Equal(t, "string", option.Type)
+			require.Contains(t, option.Description, "location")
+		case "alpha.all":
+			foundAlphaAll = true
+			require.Equal(t, "string", option.Type)
+			require.Contains(t, option.AllowedValues, "on")
+			require.Contains(t, option.AllowedValues, "off")
+			require.Equal(t, "AZD_ALPHA_ENABLE_ALL", option.EnvVar)
+		}
+	}
+
+	// Verify expected options are present
+	require.True(t, foundDefaultsSubscription, "defaults.subscription option should be present")
+	require.True(t, foundDefaultsLocation, "defaults.location option should be present")
+	require.True(t, foundAlphaAll, "alpha.all option should be present")
+}
+
+func TestConfigOptionStructure(t *testing.T) {
+	options := GetAllConfigOptions()
+
+	for _, option := range options {
+		// All options should have required fields
+		require.NotEmpty(t, option.Key)
+		require.NotEmpty(t, option.Description)
+		require.NotEmpty(t, option.Type)
+
+		// If AllowedValues is set, it should not be empty
+		if len(option.AllowedValues) > 0 {
+			for _, val := range option.AllowedValues {
+				require.NotEmpty(t, val, "Allowed value should not be empty")
+			}
+		}
+	}
+}

cli/azd/resources/config_options.yaml

@@ -0,0 +1,64 @@
+- key: defaults.subscription
+  description: "Default Azure subscription ID to use for operations."
+  type: string
+  example: "00000000-0000-0000-0000-000000000000"
+- key: defaults.location
+  description: "Default Azure location/region to use for deployments."
+  type: string
+  example: "eastus"
+- key: alpha.all
+  description: "Enable or disable all alpha features at once."
+  type: string
+  allowedValues: ["on", "off"]
+  envVar: "AZD_ALPHA_ENABLE_ALL"
+- key: alpha.aks.helm
+  description: "Enable Helm support for AKS deployments."
+  type: string
+  allowedValues: ["on", "off"]
+  envVar: "AZD_ALPHA_ENABLE_AKS_HELM"
+- key: alpha.aks.kustomize
+  description: "Enable Kustomize support for AKS deployments."
+  type: string
+  allowedValues: ["on", "off"]
+  envVar: "AZD_ALPHA_ENABLE_AKS_KUSTOMIZE"
+- key: alpha.aca.persistDomains
+  description: "Do not change custom domains when deploying Azure Container Apps."
+  type: string
+  allowedValues: ["on", "off"]
+  envVar: "AZD_ALPHA_ENABLE_ACA_PERSISTDOMAINS"
+- key: alpha.azd.operations
+  description: "Extends provisioning providers with azd operations."
+  type: string
+  allowedValues: ["on", "off"]
+  envVar: "AZD_ALPHA_ENABLE_AZD_OPERATIONS"
+- key: alpha.aca.persistIngressSessionAffinity
+  description: "Do not change Ingress Session Affinity when deploying Azure Container Apps."
+  type: string
+  allowedValues: ["on", "off"]
+  envVar: "AZD_ALPHA_ENABLE_ACA_PERSISTINGRESSSESSIONAFFINITY"
+- key: alpha.deployment.stacks
+  description: "Enables Azure deployment stacks for ARM/Bicep based deployments."
+  type: string
+  allowedValues: ["on", "off"]
+  envVar: "AZD_ALPHA_ENABLE_DEPLOYMENT_STACKS"
+- key: alpha.llm
+  description: "Enables the use of LLMs in the CLI."
+  type: string
+  allowedValues: ["on", "off"]
+  envVar: "AZD_ALPHA_ENABLE_LLM"
+- key: alpha.language.custom
+  description: "Enables support for services to use custom language."
+  type: string
+  allowedValues: ["on", "off"]
+  envVar: "AZD_ALPHA_ENABLE_LANGUAGE_CUSTOM"
+- key: template.sources
+  description: "Custom template sources for azd template list and azd init."
+  type: object
+  example: "template.sources.<name>.type"
+- key: pipeline.config.applicationServiceManagementReference
+  description: "Application Service Management Reference for Azure pipeline configuration."
+  type: string
+- key: (env) AZD_CONFIG_DIR
+  description: "Override the default configuration directory location."
+  type: envvar
+  example: "/path/to/config"

cli/azd/resources/resources.go

@@ -13,6 +13,9 @@ var TemplatesJson []byte
 //go:embed alpha_features.yaml
 var AlphaFeatures []byte
 
+//go:embed config_options.yaml
+var ConfigOptions []byte
+
 //go:embed minimal/main.bicep
 var MinimalBicep []byte