Refactored usage writing helpers.

src/cli.js

@@ -16,31 +16,90 @@ function usage() {
   return `Usage: sk-az-tools <command> [options]
 
 Commands:
-  list-apps [--display-name|-n <name>]
-  list-app-permissions --app-id|-i <appId> [--resolve|-r] [--short|-s] [--filter|-f <glob>]
-  list-app-grants --app-id|-i <appId>
-  list-resource-permissions [--app-id|-i <appId> | --display-name|-n <name>]
-  table [--header|-H <spec|auto|a>]
+  list-apps                 List Entra applications
+  list-app-permissions      List required permissions for an app
+  list-app-grants           List OAuth2 grants for an app
+  list-resource-permissions List available permissions for a resource app
+  table                     Render stdin JSON as Markdown table
+
+Global options (all commands):
+  -q, --query <jmespath>
+  -o, --output <format>     json|j|table|t|alignedtable|at|prettytable|pt
+  -h, --help
+
+Use: sk-az-tools --help <command>
+or:  sk-az-tools <command> --help`;
+}
+
+function usageListApps() {
+  return `Usage: sk-az-tools list-apps [--display-name|-n <name>] [global options]
 
 Options:
-  -n, --display-name <name>  Filter apps by exact display name
-  -i, --app-id <appId>       Application (client) ID
+  -n, --display-name <name>  Filter apps by exact display name`;
+}
+
+function usageListAppPermissions() {
+  return `Usage: sk-az-tools list-app-permissions --app-id|-i <appId> [--resolve|-r] [--short|-s] [--filter|-f <glob>] [global options]
+
+Options:
+  -i, --app-id <appId>       Application (client) ID (required)
   -r, --resolve              Resolve permission GUIDs to human-readable values
   -s, --short                Makes output more compact
-  -f, --filter <glob>        Filter by permission name glob
-  -q, --query <jmespath>     Filter output JSON using JMESPath
-  -H, --header <value>       Header mode/spec: auto|a OR "col1, col2" OR "key1: Label 1, key2: Label 2"
-  -o, --output <format>      Output format: json|j|table|t|alignedtable|at|prettytable|pt (default: json)
-  -h, --help              Show this help message`;
+  -f, --filter <glob>        Filter by permission name glob`;
+}
+
+function usageListAppGrants() {
+  return `Usage: sk-az-tools list-app-grants --app-id|-i <appId> [global options]
+
+Options:
+  -i, --app-id <appId>       Application (client) ID (required)`;
+}
+
+function usageListResourcePermissions() {
+  return `Usage: sk-az-tools list-resource-permissions [--app-id|-i <appId> | --display-name|-n <name>] [--filter|-f <glob>] [global options]
+
+Options:
+  -i, --app-id <appId>       Resource app ID
+  -n, --display-name <name>  Resource app display name
+  -f, --filter <glob>        Filter by permission name glob`;
+}
+
+function usageTable() {
+  return `Usage: sk-az-tools table [--header|-H <spec|auto|a>] [global options]
+
+Options:
+  -H, --header <value>       Header mode/spec: auto|a OR "col1, col2" OR "key1: Label 1, key2: Label 2"`;
+}
+
+function usageCommand(command) {
+  switch (command) {
+    case "list-apps":
+      return usageListApps();
+    case "list-app-permissions":
+      return usageListAppPermissions();
+    case "list-app-grants":
+      return usageListAppGrants();
+    case "list-resource-permissions":
+      return usageListResourcePermissions();
+    case "table":
+      return usageTable();
+    default:
+      return `Unknown command: ${command}\n\n${usage()}`;
+  }
 }
 
 async function main() {
   const argv = process.argv.slice(2);
   const command = argv[0];
-  if (command === "-h" || command === "--help") {
+  if (!command) {
     console.log(usage());
     process.exit(0);
   }
+  if (command === "-h" || command === "--help") {
+    const helpCommand = argv[1];
+    console.log(helpCommand ? usageCommand(helpCommand) : usage());
+    process.exit(0);
+  }
 
   const { values } = parseArgs({
     args: argv.slice(1),
@@ -59,8 +118,8 @@ async function main() {
     allowPositionals: false,
   });
 
-  if (values.help || !command) {
-    console.log(usage());
+  if (values.help) {
+    console.log(usageCommand(command));
     process.exit(0);
   }