Handle out of space errors

I would have thought that this would come up so rarely as to not be an
issue, but I see bug reports for this semi-frequently.  Let's deal with
this one more properly.

Author: Lisa Ugray

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    cli-kit (3.2.0)
+    cli-kit (3.3.0)
       cli-ui (>= 1.1.4)
 
 GEM
@@ -11,7 +11,7 @@ GEM
     ast (2.4.0)
     builder (3.2.3)
     byebug (9.0.6)
-    cli-ui (1.1.4)
+    cli-ui (1.2.3)
     metaclass (0.0.4)
     method_source (0.8.2)
     minitest (5.10.2)
@@ -53,4 +53,4 @@ DEPENDENCIES
   rubocop (~> 0.56.0)
 
 BUNDLED WITH
-   1.17.1
+   1.17.3

lib/cli/kit/error_handler.rb

@@ -4,9 +4,10 @@
 module CLI
   module Kit
     class ErrorHandler
-      def initialize(log_file:, exception_reporter:)
+      def initialize(log_file:, exception_reporter:, tool_name: nil)
         @log_file = log_file
         @exception_reporter_or_proc = exception_reporter || NullExceptionReporter
+        @tool_name = tool_name
       end
 
       module NullExceptionReporter
@@ -84,6 +85,14 @@ def handle_abort
       rescue Interrupt
         $stderr.puts(format_error_message("Interrupt"))
         CLI::Kit::EXIT_FAILURE_BUT_NOT_BUG
+      rescue Errno::ENOSPC
+        message = if @tool_name
+          "Your disk is full - {{command:#{@tool_name}}} requires free space to operate"
+        else
+          "Your disk is full - free space is required to operate"
+        end
+        $stderr.puts(format_error_message(message))
+        CLI::Kit::EXIT_FAILURE_BUT_NOT_BUG
       end
 
       def exception_reporter

lib/cli/kit/version.rb

@@ -1,5 +1,5 @@
 module CLI
   module Kit
-    VERSION = "3.2.0"
+    VERSION = "3.3.0"
   end
 end

test/cli/kit/error_handler_test.rb

@@ -7,14 +7,7 @@ class ErrorHandlerTest < MiniTest::Test
       def setup
         @rep = Object.new
         @tf  = Tempfile.create('executor-log').tap(&:close)
-        @eh = ErrorHandler.new(log_file: @tf.path, exception_reporter: @rep)
-        class << @eh
-          attr_reader :exit_handler
-          # Prevent `install!` from actually installing the hook.
-          def at_exit(&block)
-            @exit_handler = block
-          end
-        end
+        @eh = error_handler
       end
 
       def teardown
@@ -77,6 +70,29 @@ def test_bug
         end
       end
 
+      def test_out_of_space
+        run_test(
+          expect_code:   CLI::Kit::EXIT_FAILURE_BUT_NOT_BUG,
+          expect_out:    "",
+          expect_err:    "\e[0;31mYour disk is full - free space is required to operate\e[0m\n",
+          expect_report: false,
+        ) do
+          raise(Errno::ENOSPC)
+        end
+      end
+
+      def test_out_of_space_with_name
+        @eh = error_handler(tool_name: "foo")
+        run_test(
+          expect_code:   CLI::Kit::EXIT_FAILURE_BUT_NOT_BUG,
+          expect_out:    "",
+          expect_err:    "\e[0;31mYour disk is full - \e[0;31;36mfoo\e[0;31m requires free space to operate\e[0m\n",
+          expect_report: false,
+        ) do
+          raise(Errno::ENOSPC)
+        end
+      end
+
       def test_interrupt
         run_test(
           expect_code:   CLI::Kit::EXIT_FAILURE_BUT_NOT_BUG,
@@ -126,6 +142,18 @@ def test_exit_1
 
       private
 
+      def error_handler(tool_name: nil)
+        ErrorHandler.new(log_file: @tf.path, exception_reporter: @rep, tool_name: tool_name).tap do |eh|
+          class << eh
+            attr_reader :exit_handler
+            # Prevent `install!` from actually installing the hook.
+            def at_exit(&block)
+              @exit_handler = block
+            end
+          end
+        end
+      end
+
       def with_handler
         code = nil
         out, err = capture_io do