Return non-zero exit code if error(s) detected when --keep-going

flag is set.

Signed-off-by:  Henry Cox <[email protected]>

bin/genhtml

@@ -5754,6 +5754,10 @@ if (0 == $exit_status &&
 }
 
 lcovutil::save_profile(File::Spec->catfile($output_directory, 'genhtml'));
+# exit with non-zero status if --keep-going and some errors detected
+$exit_status = 1
+    if (0 == $exit_status &&
+        lcovutil::saw_error());
 
 exit($exit_status);
 

bin/geninfo

@@ -652,6 +652,10 @@ lcovutil::save_profile(
      (defined($output_filename) && '-' ne $output_filename) ? $output_filename :
          "geninfo");
 
+# exit with non-zero status if --keep-going and some errors detected
+$exit_code = 1
+    if (0 == $exit_code &&
+        lcovutil::saw_error());
 exit($exit_code);
 
 #

bin/lcov

@@ -449,6 +449,11 @@ $lcovutil::profileData{total} = $end - $begin;
 lcovutil::save_profile($output_filename ? $output_filename : "lcov")
     unless $lcovutil::lcov_capture;
 
+# exit with non-zero status if --keep-going and some errors detected
+$exit_code = 1
+    if (0 == $exit_code &&
+        lcovutil::saw_error());
+
 exit($exit_code);
 
 #

lib/lcovutil.pm

@@ -1638,6 +1638,13 @@ sub _count_message($$)
     ++$message_types{$type}{$name};
 }
 
+sub saw_error
+{
+    # true if we saw at least one error when 'stop_on_error' is false
+    # enables us to return non-zero exit status if any errors were detected
+    return exists($message_types{error});
+}
+
 sub ignorable_error($$;$)
 {
     my ($code, $msg, $quiet) = @_;

man/lcovrc.5

@@ -817,8 +817,14 @@ This option is used by genhtml, lcov, and geninfo.
 .BR stop_on_error " = "
 .IR 0|1
 .IP
-If set to 1, tell the tools to ignore errors and keep going to try to generate a result - however flawed or incomplete that result might be.
+If set to 0, tell the tools to ignore errors and keep going to try to generate a result - however flawed or incomplete that result might be.
 Note that ignoring some errors may lead to other errors.
+.br
+The tool will return a non-zero exit code if one or more errors are detected
+during execution when
+.I stop_on_error
+is disabled.  That is, the tool will continue execution in the presence
+of errors but will return an exit status.
 
 .br
 
@@ -830,10 +836,11 @@ Default is 1:  stop when error occurs.
 
 If the
 .I 'ignore_error msgType'
-option is also used, then those messages will be treated as warnings rather than errors (or will be entirely suppressed if the message type appears multiple times in the ignore_messages option).
+option is also used, then those messages will be treated as warnings rather than errors (or will be entirely suppressed if the message type appears multiple times in the ignore_messages option).  Warnings do not cause a non-zero exit status.
 
 This option is used by genhtml, lcov, and geninfo.
 
+
 .PP
 
 .BR warn_once_per_file " = "