Return non-zero status code on exceptions found

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## HEAD (unreleased)
 
+- CLI returns non-zero exit code when syntax error is found (https://github.com/zombocom/dead_end/pull/86)
 - Let -v respond with gem version instead of 'unknown' (https://github.com/zombocom/dead_end/pull/82)
 
 ## 2.0.0

exe/dead_end

@@ -64,9 +64,15 @@ options[:record_dir] = "tmp" if ENV["DEBUG"]
 
 warn "Record dir: #{options[:record_dir]}" if options[:record_dir]
 
-DeadEnd.call(
+display = DeadEnd.call(
   source: file.read,
   filename: file.expand_path,
   terminal: options[:terminal],
   record_dir: options[:record_dir]
 )
+
+if display.document_ok?
+  exit(0)
+else
+  exit(1)
+end

lib/dead_end/display_invalid_blocks.rb

@@ -21,11 +21,15 @@ def initialize(code_lines:, blocks:, io: $stderr, filename: nil, terminal: false
       @invalid_obj = invalid_obj
     end
 
+    def document_ok?
+      @blocks.none? { |b| !b.hidden? }
+    end
+
     def call
-      if @blocks.any? { |b| !b.hidden? }
-        found_invalid_blocks
-      else
+      if document_ok?
         @io.puts "Syntax OK"
+      else
+        found_invalid_blocks
       end
       self
     end

spec/integration/exe_cli_spec.rb

@@ -9,7 +9,7 @@ def exe_path
     end
 
     def exe(cmd)
-      out = run!("#{exe_path} #{cmd}")
+      out = run!("#{exe_path} #{cmd}", raise_on_nonzero_exit: false)
       puts out if ENV["DEBUG"]
       out
     end
@@ -18,6 +18,7 @@ def exe(cmd)
       ruby_file = exe_path
       out = exe(ruby_file)
       expect(out.strip).to include("Syntax OK")
+      expect($?.success?).to be_truthy
     end
 
     it "parses invalid code" do
@@ -26,6 +27,8 @@ def exe(cmd)
 
       expect(out.strip).to include("Missing `end` detected")
       expect(out.strip).to include("❯ 36      def filename")
+
+      expect($?.success?).to be_falsey
     end
 
     it "handles heredocs" do

spec/spec_helper.rb

@@ -37,9 +37,9 @@ def code_line_array(source)
   DeadEnd::CleanDocument.new(source: source).call.lines
 end
 
-def run!(cmd)
+def run!(cmd, raise_on_nonzero_exit: true)
   out = `#{cmd} 2>&1`
-  raise "Command: #{cmd} failed: #{out}" unless $?.success?
+  raise "Command: #{cmd} failed: #{out}" if !$?.success? && raise_on_nonzero_exit
   out
 end