- Add DEBUG=1 tip on general exception

lib/runfile/entrypoint.rb

@@ -33,11 +33,15 @@ def run!
       say! 'm`Goodbye`', replace: true
       1
     rescue => e
-      puts e.backtrace.reverse if ENV['DEBUG']
+      if ENV['DEBUG']
+        say! e.backtrace.reverse.join("\n")
+        say! '---'
+      end
       origin = e.backtrace_locations.first
       location = "#{origin.path}:#{origin.lineno}"
       say! "rib` #{e.class} ` in nu`#{location}`"
       say! e.message
+      say! "\nPrefix with nu`DEBUG=1` for full backtrace" unless ENV['DEBUG']
       1
     end
 

lib/runfile/userfile.rb

@@ -85,14 +85,14 @@ def find_action(args)
 
     def run_local(argv)
       exit_code = nil
-      
+
       Runner.run docopt, argv: argv, version: version do |args|
         action = find_action(args)
         raise ActionNotFound, 'Cannot find action. Is it properly defined?' unless action
 
         exit_code = action.run args
       end
-      
+
       exit_code if exit_code.is_a? Integer
     end
 

spec/approvals/bin/action-error

@@ -1,2 +1,4 @@
  ZeroDivisionError  in runfile:2
 divided by 0
+
+Prefix with DEBUG=1 for full backtrace

spec/approvals/bin/syntax-error

@@ -1,2 +1,4 @@
  NameError  in runfile:1
 undefined local variable or method `nicely' for #<Runfile::Userfile name=nil, path="runfile", context={}>
+
+Prefix with DEBUG=1 for full backtrace

spec/runfile/entrypoint_spec.rb

@@ -35,6 +35,13 @@
       expect { subject.run! }.to output(/some error/).to_stderr
     end
 
+    it 'exits displays backtrace on exceptions when DEBUG=1' do
+      ENV['DEBUG'] = '1'
+      allow(subject).to receive(:run).and_raise(StandardError, 'some error')
+      expect { subject.run! }.to output(%r{lib/rspec}).to_stderr
+      ENV['DEBUG'] = nil
+    end
+
     context 'when the masterfile action ends with an integer value' do
       let(:argv) { %w[] }