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authorLudovic Courtès <ludo@gnu.org>2022-12-09 17:47:08 +0100
committerLudovic Courtès <ludo@gnu.org>2022-12-09 17:49:22 +0100
commit591af24ade1021d91a3e7c62fcc7a8c90f00d4bb (patch)
tree5bb5df57945451751d176a50a7d2c042d621eef4 /gnu/installer
parent556520a33c8a62fc80ac9ab925f86f08986d138b (diff)
installer: Print progress bars and such as soon as \r is read.
Fixes <https://issues.guix.gnu.org/59922>. Previously progress bars and related things would be buffered by 'run-external-command-with-line-hooks' until \n is read. * gnu/installer/utils.scm (run-external-command-with-line-hooks): Use 'read-delimited' rather than 'get-line'. Pass 'concat as the last argument. (%display-line-hook): Remove. (run-command): Use 'display' instead of '%display-line-hook'. (%syslog-line-hook): Add "\n" when LINE doesn't end in \n. (%installer-log-line-hook): Do not add an extra newline. (installer-log-line): Add an extra newline.
Diffstat (limited to 'gnu/installer')
-rw-r--r--gnu/installer/newt.scm2
-rw-r--r--gnu/installer/utils.scm26
2 files changed, 15 insertions, 13 deletions
diff --git a/gnu/installer/newt.scm b/gnu/installer/newt.scm
index 798ff53af2..e1c4453168 100644
--- a/gnu/installer/newt.scm
+++ b/gnu/installer/newt.scm
@@ -116,7 +116,7 @@ report it by email to ~a.") uploaded-name %guix-bug-report-address)
(define command-output "")
(define (line-accumulator line)
(set! command-output
- (string-append/shared command-output line "\n")))
+ (string-append/shared command-output line)))
(define result (run-external-command-with-line-hooks (list line-accumulator)
args))
(define exit-val (status:exit-val result))
diff --git a/gnu/installer/utils.scm b/gnu/installer/utils.scm
index 061493e6a7..6838410166 100644
--- a/gnu/installer/utils.scm
+++ b/gnu/installer/utils.scm
@@ -1,6 +1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018, 2020 Mathieu Othacehe <m.othacehe@gmail.com>
-;;; Copyright © 2019, 2020 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2019, 2020, 2022 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -159,7 +159,9 @@ COMMAND will be run in a pseudoterminal. Returns the integer status value of
the child process as returned by waitpid."
(define (handler input)
(and
- (and=> (get-line input)
+ ;; Lines for progress bars etc. end in \r; treat is as a line ending so
+ ;; those lines are printed right away.
+ (and=> (read-delimited "\r\n" input 'concat)
(lambda (line)
(if (eof-object? line)
#f
@@ -186,7 +188,7 @@ in a pseudoterminal."
(installer-log-line "running command ~s" command)
(define result (run-external-command-with-line-hooks
- (list %display-line-hook) command
+ (list display) command
#:tty? tty?))
(define exit-val (status:exit-val result))
(define term-sig (status:term-sig result))
@@ -264,7 +266,10 @@ values."
(or port (%make-void-port "w")))))
(define (%syslog-line-hook line)
- (format (syslog-port) "installer[~d]: ~a~%" (getpid) line))
+ (let ((line (if (string-suffix? "\r" line)
+ (string-append (string-drop-right line 1) "\n")
+ line)))
+ (format (syslog-port) "installer[~d]: ~a" (getpid) line)))
(define-syntax syslog
(lambda (s)
@@ -293,11 +298,7 @@ values."
port)))
(define (%installer-log-line-hook line)
- (format (installer-log-port) "~a~%" line))
-
-(define (%display-line-hook line)
- (display line)
- (newline))
+ (display line (installer-log-port)))
(define %default-installer-line-hooks
(list %syslog-line-hook
@@ -309,9 +310,10 @@ values."
(syntax-case s ()
((_ fmt args ...)
(string? (syntax->datum #'fmt))
- #'(let ((formatted (format #f fmt args ...)))
- (for-each (lambda (f) (f formatted))
- %default-installer-line-hooks))))))
+ (with-syntax ((fmt (string-append (syntax->datum #'fmt) "\n")))
+ #'(let ((formatted (format #f fmt args ...)))
+ (for-each (lambda (f) (f formatted))
+ %default-installer-line-hooks)))))))
;;;