[bug#33012] [PATCH 3/3] ui: Fix port-buffering with guile@2.0.

[ericbavier@centurylink.net]

From: Eric Bavier <bavier@cray.com>

* guix/status.scm (build-event-output-port)[guile@2.0]: Do not call 'setvbuf'
on custom binary port.
* tests/status.scm (current-build-output-port, UTF-8 + garbage)[guile@2.0]:
Use "?" in place of REPLACEMENT CHARACTER.
---
 guix/status.scm  | 5 +++--
 tests/status.scm | 5 ++++-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/guix/status.scm b/guix/status.scm
index 13537c70c..6dba7e049 100644
--- a/guix/status.scm
+++ b/guix/status.scm
@@ -502,8 +502,9 @@ The second return value is a thunk to retrieve the current state."

   ;; The build port actually receives Unicode strings.
   (set-port-encoding! port "UTF-8")
-  (setvbuf port (cond-expand (guile-2.2 'line) (else _IOLBF)))
-
+  (cond-expand
+    ((and guile-2 (not guile-2.2)) #t)
+    (else (setvbuf port 'line)))
   (values port (lambda () %state)))

 (define (call-with-status-report on-event thunk)
diff --git a/tests/status.scm b/tests/status.scm
index 486ad04dd..846a6f415 100644
--- a/tests/status.scm
+++ b/tests/status.scm
@@ -124,7 +124,10 @@

 (test-equal "current-build-output-port, UTF-8 + garbage"
   ;; What about a mixture of UTF-8 + garbage?
-  '((build-log "garbage: �lambda: λ\n"))
+  (let ((replacement (cond-expand
+                      ((and guile-2 (not guile-2.2)) "?")
+                      (else "�"))))
+    `((build-log ,(string-append "garbage: " replacement "lambda: λ\n"))))
   (let-values (((port get-status) (build-event-output-port cons '())))
     (display "garbage: " port)
     (put-bytevector port #vu8(128))
--
2.19.0