;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
+;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu build bootloader)
+ #:use-module (srfi srfi-34)
+ #:use-module (srfi srfi-35)
#:use-module (ice-9 binary-ports)
- #:export (write-file-on-device))
+ #:use-module (ice-9 popen)
+ #:use-module (ice-9 match)
+ #:use-module (ice-9 rdelim)
+ #:use-module (ice-9 format)
+ #:export (write-file-on-device
+ invoke/quiet))
\f
;;;
(seek output offset SEEK_SET)
(put-bytevector output bv))
#:binary #t)))))
+
+(define-syntax-rule (G_ str) str) ;for xgettext
+
+(define (open-pipe-with-stderr program . args)
+ "Run PROGRAM with ARGS in an input pipe, but, unlike 'open-pipe*', redirect
+both its standard output and standard error to the pipe. Return two value:
+the pipe to read PROGRAM's data from, and the PID of the child process running
+PROGRAM."
+ ;; 'open-pipe*' doesn't attempt to capture stderr in any way, which is why
+ ;; we need to roll our own.
+ (match (pipe)
+ ((input . output)
+ (match (primitive-fork)
+ (0
+ (dynamic-wind
+ (const #t)
+ (lambda ()
+ (close-port input)
+ (dup2 (fileno output) 1)
+ (dup2 (fileno output) 2)
+ (apply execlp program program args))
+ (lambda ()
+ (primitive-exit 127))))
+ (pid
+ (close-port output)
+ (values input pid))))))
+
+;; TODO: Move to (guix build utils) on the next rebuild cycle.
+(define (invoke/quiet program . args)
+ "Invoke PROGRAM with ARGS and capture PROGRAM's standard output and standard
+error. If PROGRAM succeeds, print nothing and return the unspecified value;
+otherwise, raise a '&message' error condition that includes the status code
+and the output of PROGRAM."
+ (define-values (pipe pid)
+ (apply open-pipe-with-stderr program args))
+
+ (let loop ((lines '()))
+ (match (read-line pipe)
+ ((? eof-object?)
+ (close-port pipe)
+ (match (waitpid pid)
+ ((_ . status)
+ (unless (zero? status)
+ (raise (condition
+ (&message
+ (message (format #f (G_ "'~a~{ ~a~}' exited with status ~a; \
+output follows:~%~%~{ ~a~%~}")
+ program args
+ (or (status:exit-val status)
+ status)
+ (reverse lines))))))))))
+ (line
+ (loop (cons line lines))))))
;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2015, 2016, 2019 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
(define-module (test-build-utils)
#:use-module (guix tests)
#:use-module (guix build utils)
+ #:use-module ((gnu build bootloader)
+ #:select (invoke/quiet))
#:use-module ((guix utils)
#:select (%current-system call-with-temporary-directory))
#:use-module (gnu packages)
#:use-module (gnu packages bootstrap)
#:use-module (srfi srfi-34)
+ #:use-module (srfi srfi-35)
#:use-module (srfi srfi-64)
#:use-module (rnrs io ports)
#:use-module (ice-9 popen))
(and (zero? (close-pipe pipe))
str)))))))
+(test-assert "invoke/quiet, success"
+ (begin
+ (invoke/quiet "true")
+ #t))
+
+(test-assert "invoke/quiet, failure"
+ (guard (c ((message-condition? c)
+ (string-contains (condition-message c) "This is an error.")))
+ (invoke/quiet "sh" "-c" "echo This is an error. ; false")
+ #f))
+
+(test-assert "invoke/quiet, failure, message on stderr"
+ (guard (c ((message-condition? c)
+ (string-contains (condition-message c)
+ "This is another error.")))
+ (invoke/quiet "sh" "-c" "echo This is another error. >&2 ; false")
+ #f))
(test-end)