From 636773639ffa3a1da2b535148d13c6c895a45bc9 Mon Sep 17 00:00:00 2001
From: Thijs Schreijer <thijs@thijsschreijer.nl>
Date: Mon, 16 Jul 2018 15:31:14 +0200
Subject: [PATCH] fix(cli) fail if LuaCov is specified but unavailable

Fails with an error (to stderr) if `-c` was specified, but LuaCov
is not available.
Previously it would just print to stdout and continue without
coverage reporting.
---
 busted/modules/luacov.lua | 3 ++-
 busted/runner.lua         | 6 +++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/busted/modules/luacov.lua b/busted/modules/luacov.lua
index 99cfc8f5..51a9ad33 100644
--- a/busted/modules/luacov.lua
+++ b/busted/modules/luacov.lua
@@ -4,7 +4,7 @@ return function()
     local result, luacov = pcall(require, 'luacov.runner')
 
     if not result then
-      return print('LuaCov not found on the system, try running without --coverage option, or install LuaCov first')
+      return nil, 'LuaCov not found on the system, try running without --coverage option, or install LuaCov first'
     end
 
     -- call it to start
@@ -16,6 +16,7 @@ return function()
     table.insert(luacov.configuration.exclude, 'luassert%.')
     table.insert(luacov.configuration.exclude, 'say%.')
     table.insert(luacov.configuration.exclude, 'pl%.')
+    return true
   end
 
   return loadLuaCov
diff --git a/busted/runner.lua b/busted/runner.lua
index eefac142..6605eec1 100644
--- a/busted/runner.lua
+++ b/busted/runner.lua
@@ -56,7 +56,11 @@ return function(options)
 
   -- If coverage arg is passed in, load LuaCovsupport
   if cliArgs.coverage then
-    luacov()
+    local ok, err = luacov()
+    if not ok then
+      io.stderr:write(appName .. ': error: ' .. err .. '\n')
+      exit(1, forceExit)
+    end
   end
 
   -- If auto-insulate is disabled, re-register file without insulation