Show command when remote execution fail

features/actions/sh.feature

@@ -37,3 +37,15 @@ Feature: `sh' task action
       """
     When I execute the recipe
     Then the output must not contain "after_fail"
+
+  Scenario: prints command when execution fail
+    Given a recipe with:
+      """
+      target 'some_host.test'
+
+      task :some_task do
+        sh '\false'
+      end
+      """
+    When I execute the recipe
+    Then the output must match /\A\w+Error:\s+\\false/

lib/producer/core/cli.rb

@@ -6,17 +6,21 @@ module Producer
       USAGE = "Usage: #{File.basename $0} [-v] [-n] recipe_file".freeze
 
       EX_USAGE    = 64
+      EX_SOFTWARE = 70
 
       class << self
         def run!(arguments, output: $stderr)
-          begin
           cli = new(arguments)
+          begin
             cli.parse_arguments!
+            cli.run
           rescue ArgumentError
             output.puts USAGE
             exit EX_USAGE
+          rescue RuntimeError => e
+            output.puts "#{e.class.name.split('::').last}: #{e.message}"
+            exit EX_SOFTWARE
           end
-          cli.run
         end
       end
 

lib/producer/core/errors.rb

@@ -1,7 +1,8 @@
 module Producer
   module Core
     Error                       = Class.new(StandardError)
+    RuntimeError                = Class.new(RuntimeError)
     ConditionNotMetError        = Class.new(Error)
-    RemoteCommandExecutionError = Class.new(Error)
+    RemoteCommandExecutionError = Class.new(RuntimeError)
   end
 end

lib/producer/core/remote.rb

@@ -32,7 +32,7 @@ module Producer
 
             ch.on_request 'exit-status' do |c, data|
               exit_status = data.read_long
-              raise RemoteCommandExecutionError if exit_status != 0
+              raise RemoteCommandExecutionError, command if exit_status != 0
             end
           end
         end

spec/producer/core/cli_spec.rb

@@ -17,35 +17,33 @@ module Producer::Core
       let(:output)    { StringIO.new }
       subject(:run)   { described_class.run! arguments, output: output }
 
+      before { allow(described_class).to receive(:new) { cli } }
+
       it 'builds a new CLI with given arguments' do
-        expect(described_class)
-          .to receive(:new).with(arguments).and_call_original
+        expect(described_class).to receive(:new).with(arguments)
         run
       end
 
       it 'runs the CLI' do
-        allow(described_class).to receive(:new) { cli }
         expect(cli).to receive :run
         run
       end
 
       it 'parses CLI arguments' do
-        allow(described_class).to receive(:new) { cli }
         expect(cli).to receive :parse_arguments!
         run
       end
 
       context 'when an argument error is raised' do
         before do
-          allow(described_class).to receive(:new) { cli }
           allow(cli).to receive(:parse_arguments!)
             .and_raise described_class::ArgumentError
         end
 
         it 'exits with a return status of 64' do
-          expect { run }.to raise_error(SystemExit) { |e|
+          expect { run }.to raise_error(SystemExit) do |e|
             expect(e.status).to eq 64
-          }
+          end
         end
 
         it 'prints the usage' do
@@ -53,6 +51,24 @@ module Producer::Core
           expect(output.string).to match /\AUsage: .+/
         end
       end
+
+      context 'when a runtime error is raised' do
+        before do
+          allow(cli).to receive(:run)
+            .and_raise RuntimeError, 'some message'
+        end
+
+        it 'exits with a return status of 70' do
+          expect { run }.to raise_error(SystemExit) do |e|
+            expect(e.status).to eq 70
+          end
+        end
+
+        it 'prints exception name and message' do
+          trap_exit { run }
+          expect(output.string).to match /\ARuntimeError: some message/
+        end
+      end
     end
 
     describe '#initialize' do

spec/producer/core/remote_spec.rb

@@ -106,15 +106,24 @@ module Producer::Core
         expect(output.string).to eq arguments
       end
 
-      it 'raises an exception when the exit status code is not 0' do
+      context 'when command execution fails' do
+        before do
           story_with_new_channel do |ch|
             ch.sends_exec command
             ch.gets_data arguments
             ch.gets_exit_status 1
           end
+        end
+
+        it 'raises an exception' do
           expect { remote.execute command }
             .to raise_error(RemoteCommandExecutionError)
         end
+
+        it 'includes the command in the exception message' do
+          expect { remote.execute command }.to raise_error /#{command}/
+        end
+      end
     end
 
     describe '#environment' do