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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
;;; This program replicates the behavior of Hydra's 'hydra-eval-guile-job'.
;;; It evaluates the Hydra job defined by the program passed as its first
;;; arguments and outputs an sexp of the jobs on standard output.
(use-modules (guix store)
(srfi srfi-19)
(ice-9 match)
(ice-9 pretty-print)
(ice-9 format))
(define %user-module
;; Hydra user module.
(let ((m (make-module)))
(beautify-user-module! m)
m))
(define (call-with-time thunk kont)
"Call THUNK and pass KONT the elapsed time followed by THUNK's return
values."
(let* ((start (current-time time-monotonic))
(result (call-with-values thunk list))
(end (current-time time-monotonic)))
(apply kont (time-difference end start) result)))
(define (call-with-time-display thunk)
"Call THUNK and write to the current output port its duration."
(call-with-time thunk
(lambda (time . results)
(format #t "~,3f seconds~%"
(+ (time-second time)
(/ (time-nanosecond time) 1e9)))
(apply values results))))
(define (assert-valid-job job thing)
"Raise an error if THING is not an alist with a valid 'derivation' entry.
Otherwise return THING."
(unless (and (list? thing)
(and=> (assoc-ref thing 'derivation)
(lambda (value)
(and (string? value)
(string-suffix? ".drv" value)))))
(error "job did not produce a valid alist" job thing))
thing)
;; Without further ado...
(match (command-line)
((command file)
;; Load FILE, a Scheme file that defines Hydra jobs.
(let ((port (current-output-port)))
(save-module-excursion
(lambda ()
(set-current-module %user-module)
(primitive-load file)))
(with-store store
;; Make sure we don't resort to substitutes.
(set-build-options store
#:use-substitutes? #f
#:substitute-urls '())
;; Grafts can trigger early builds. We do not want that to happen
;; during evaluation, so use a sledgehammer to catch such problems.
(set! build-things
(lambda (store . args)
(format (current-error-port)
"error: trying to build things during evaluation!~%")
(format (current-error-port)
"'build-things' arguments: ~s~%" args)
(exit 1)))
;; Call the entry point of FILE and print the resulting job sexp.
(pretty-print
(match ((module-ref %user-module 'hydra-jobs) store '())
(((names . thunks) ...)
(map (lambda (job thunk)
(format (current-error-port) "evaluating '~a'... " job)
(force-output (current-error-port))
(cons job
(assert-valid-job job
(call-with-time-display thunk))))
names thunks)))
port))))
((command _ ...)
(format (current-error-port) "Usage: ~a FILE
Evaluate the Hydra jobs defined in FILE.~%"
command)
(exit 1)))
;;; Local Variables:
;;; eval: (put 'call-with-time 'scheme-indent-function 1)
;;; End:
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