Handle duplicate stack names across endpoints in console command

When a stack name exists on multiple endpoints, error with a list showing
each match with its endpoint ID and name. Pass --endpoint ID to disambiguate.
Single matches continue to work without any extra flags.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/portainer_cli.rb

@@ -31,6 +31,7 @@ module PortainerCli
         portainer-cli create stack    --endpoint ID --name NAME --file FILE
         portainer-cli create container --endpoint ID --image IMAGE [--name NAME] [--port h:c] [--env K=V]
         portainer-cli console <stack> [container]                Open interactive shell (resolves endpoint automatically)
+          --endpoint ID                                          Disambiguate when stack name exists on multiple endpoints
           --shell SHELL                                          Shell to use (default: /bin/sh)
           --run CMD                                              Run command instead of a bare shell
         portainer-cli exec <endpoint-id> <container>            Open interactive shell (manual endpoint)

lib/portainer_cli/commands/console.rb

@@ -25,12 +25,13 @@ module PortainerCli
           o.on('--shell SHELL',    'Shell to use (default: /bin/sh)')    { |v| opts[:shell] = v }
           o.on('--run CMD',        'Run command instead of a bare shell') { |v| opts[:run] = v }
           o.on('--quiet',          'Suppress status output')              { opts[:quiet] = true }
+          o.on('--endpoint ID',    'Endpoint ID to disambiguate stacks')  { |v| opts[:endpoint] = v }
         end.parse!(args)
 
-        stack_name     = args.shift or error("Usage: portainer-cli console <stack> [container] [--run CMD] [--shell /bin/bash]")
+        stack_name     = args.shift or error("Usage: portainer-cli console <stack> [container] [--endpoint ID] [--run CMD] [--shell /bin/bash]")
         container_name = args.shift || stack_name
 
-        stack       = resolve_stack(stack_name)
+        stack       = resolve_stack(stack_name, opts[:endpoint])
         endpoint_id = stack['EndpointId']
 
         status("Stack: #{stack['Name']}  Endpoint: #{endpoint_id}", opts[:quiet])
@@ -60,16 +61,42 @@ module PortainerCli
         $stderr.puts dim(msg) unless quiet
       end
 
-      def resolve_stack(name_or_id)
+      def resolve_stack(name_or_id, endpoint_id = nil)
         stacks = @client.get('/api/stacks')
-        match  = stacks.find do |s|
+
+        matches = stacks.select do |s|
           s['Name'] == name_or_id || s['Id'].to_s == name_or_id
         end
-        unless match
-          available = stacks.map { |s| "  #{s['Id']}  #{s['Name']}" }.join("\n")
+
+        if matches.empty?
+          available = stacks.map { |s| "  #{s['Id']}  #{s['Name']}  (endpoint: #{s['EndpointId']})" }.join("\n")
           error("Stack '#{name_or_id}' not found. Available stacks:\n#{available}")
         end
-        match
+
+        if matches.size > 1
+          if endpoint_id
+            matches = matches.select { |s| s['EndpointId'].to_s == endpoint_id.to_s }
+            if matches.empty?
+              error("Stack '#{name_or_id}' not found on endpoint #{endpoint_id}. " \
+                    "It exists on endpoint(s): #{matches.map { |s| s['EndpointId'] }.join(', ')}")
+            end
+          else
+            endpoint_names = endpoint_name_map
+            list = matches.map do |s|
+              ep_name = endpoint_names[s['EndpointId']] || s['EndpointId'].to_s
+              "  #{s['Id']}  #{s['Name']}  (endpoint #{s['EndpointId']}: #{ep_name})"
+            end.join("\n")
+            error("Ambiguous stack '#{name_or_id}' exists on multiple endpoints. Use --endpoint ID:\n#{list}")
+          end
+        end
+
+        matches.first
+      end
+
+      def endpoint_name_map
+        @client.get('/api/endpoints').each_with_object({}) { |e, h| h[e['Id']] = e['Name'] }
+      rescue StandardError
+        {}
       end
 
       def resolve_container(endpoint_id, name_or_id, stack_name = nil, quiet = false)