This can be useful for diagnosing failures, especially since
GNU tail supports inotify these days.
---
test/test_helper.rb | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 94a5b1b6..e3c6ad4e 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -37,13 +37,25 @@
def redirect_test_io
orig_err = STDERR.dup
orig_out = STDOUT.dup
- STDERR.reopen("test_stderr.#{$$}.log", "a")
- STDOUT.reopen("test_stdout.#{$$}.log", "a")
+ new_out = File.open("test_stdout.#$$.log", "a")
+ new_err = File.open("test_stderr.#$$.log", "a")
+ new_out.sync = new_err.sync = true
+
+ if tail = ENV['TAIL'] # "tail -F" if GNU, "tail -f" otherwise
+ require 'shellwords'
+ cmd = tail.shellsplit
+ cmd << new_out.path
+ cmd << new_err.path
+ pid = Process.spawn(*cmd, { 1 => 2, :pgroup => true })
+ sleep 0.1 # wait for tail(1) to startup
+ end
+ STDERR.reopen(new_err)
+ STDOUT.reopen(new_out)
STDERR.sync = STDOUT.sync = true
at_exit do
- File.unlink("test_stderr.#{$$}.log") rescue nil
- File.unlink("test_stdout.#{$$}.log") rescue nil
+ File.unlink(new_out.path) rescue nil
+ File.unlink(new_err.path) rescue nil
end
begin
@@ -51,6 +63,7 @@ def redirect_test_io
ensure
STDERR.reopen(orig_err)
STDOUT.reopen(orig_out)
+ Process.kill(:TERM, pid) if pid
end
end
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