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;;; Guix Build Coordinator
;;;
;;; Copyright © 2020 Christopher Baines <mail@cbaines.net>
;;;
;;; This file is part of the guix-build-coordinator.
;;;
;;; The Guix Build Coordinator 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.
;;;
;;; The Guix Build Coordinator 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 the guix-data-service. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (guix-build-coordinator agent)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (ice-9 match)
#:use-module (ice-9 exceptions)
#:use-module (rnrs bytevectors)
#:use-module (web http)
#:use-module (guix store)
#:use-module (guix derivations)
#:use-module (guix base32)
#:use-module (guix-build-coordinator utils)
#:use-module (guix-build-coordinator agent-messaging http)
#:export (run-agent))
(define (run-agent uuid coordinator-uri password
substitute-urls)
(while #t
(let* ((details (submit-status coordinator-uri uuid password
'idle))
(builds (let ((already-allocated-builds
(vector->list
(assoc-ref details "builds"))))
(if (null? already-allocated-builds)
(fetch-builds-for-agent
coordinator-uri uuid password)
already-allocated-builds))))
(simple-format #t "received allocated builds (~A)\n"
(length builds))
(for-each (lambda (build)
(simple-format #t "processing build: ~A\n"
(assoc-ref build "uuid"))
(let ((derivation-name (assoc-ref build "derivation-name")))
(simple-format #t "setting up to build: ~A\n"
derivation-name)
(let ((pre-build-status (pre-build-process substitute-urls
derivation-name)))
(if (eq? (assq-ref pre-build-status 'result) 'success)
(begin
(simple-format #t "setup successful, building: ~A\n"
derivation-name)
(let ((result (perform-build derivation-name)))
(and=> (derivation-log-file derivation-name)
(lambda (log-file)
(simple-format #t "uploading log file ~A\n"
log-file)
(submit-log-file
coordinator-uri uuid password
(assoc-ref build "uuid")
log-file)))
((if result
post-build-success
post-build-failure)
uuid coordinator-uri password
(assoc-ref build "uuid")
derivation-name)))
(begin
(simple-format #t "failure: ~A\n" pre-build-status)
(report-setup-failure coordinator-uri uuid password
(assoc-ref build "uuid")
pre-build-status))))))
builds)
(when (null? builds)
(sleep 5)))))
(define (pre-build-process substitute-urls derivation-name)
(define (find-missing-inputs inputs)
(let* ((output-paths
(append-map derivation-input-output-paths inputs))
(missing-paths
(remove file-exists? output-paths))
(path-substitutes
(with-store store
(set-build-options store #:substitute-urls substitute-urls)
(map (lambda (file)
(and
(has-substiutes-no-cache? substitute-urls file)
(if (has-substitutes? store file)
#t
(begin
(simple-format
#t "warning: a substitute should be available for ~A, but the daemon claims it's not\n"
file)
#f))))
missing-paths))))
(if (null? missing-paths)
'()
(if (member #f path-substitutes)
(fold (lambda (file substitute-available? result)
(if substitute-available?
result
(cons file result)))
'()
missing-paths
path-substitutes)
(begin
;; Download the substitutes
(with-store store
(set-build-options store
#:substitute-urls substitute-urls)
(build-things store missing-paths))
;; Double check everything is actually present.
(let ((missing-files (remove file-exists? output-paths)))
(if (null? missing-files)
'()
(begin
(simple-format
(current-error-port)
"error: failed to fetch substitutes for: ~A"
missing-files)
missing-files))))))))
(define (delete-outputs derivation)
(let* ((outputs (derivation-outputs derivation))
(output-file-names
(map derivation-output-path (map cdr outputs))))
(if (any file-exists? output-file-names)
(catch
#t
(lambda ()
(with-store store
(delete-paths store output-file-names))
#t)
(lambda (key args)
(simple-format (current-error-port)
"error: delete-outputs: ~A ~A\n"
key args)
#f))
#t)))
(let ((derivation
(if (file-exists? derivation-name)
(read-derivation-from-file derivation-name)
(begin (retry-on-error
(lambda ()
(substitute-derivation derivation-name
#:substitute-urls
substitute-urls))
#:times 12
#:delay 20)
(read-derivation-from-file derivation-name)))))
(match (delete-outputs derivation)
(#t
(let ((missing-inputs
(find-missing-inputs (derivation-inputs derivation))))
(if (null? missing-inputs)
'((result . success))
`((result . failure)
(failure_reason . missing_inputs)
(missing_inputs . ,(list->vector missing-inputs))))))
(failure
'((result . failure)
(failure_reason . could_not_delete_outputs))))))
(define (perform-build derivation-name)
(with-store store
(set-build-options store
#:use-substitutes? #f)
(parameterize ((current-build-output-port (%make-void-port "w")))
(catch #t
(lambda ()
(build-things store (list derivation-name))
#t)
(lambda (key . args)
(simple-format (current-error-port)
"error: build: ~A ~A\n"
key args)
#f)))))
(define (post-build-failure uuid coordinator-uri password
build-id derivation)
(simple-format #t "build ~A failed, reporting to coordinator\n"
build-id)
(submit-build-result coordinator-uri uuid password
build-id
'((result . failure))))
(define (post-build-success uuid coordinator-uri password
build-id derivation)
(simple-format #t "build ~A successful, reporting to coordinator\n"
build-id)
(let ((output-details
(map
(match-lambda
((output-name . output)
(simple-format #t "submitting output ~A\n"
(derivation-output-path output))
(submit-output coordinator-uri uuid password
build-id output-name
(derivation-output-path output))
(let ((path-info (with-store store
(query-path-info
store
(derivation-output-path output)))))
`((name . ,output-name)
(hash . ,(bytevector->nix-base32-string
(path-info-hash path-info)))
(size . ,(path-info-nar-size path-info))
(references . ,(list->vector
(map basename
(path-info-references path-info))))))))
(derivation-outputs (read-derivation-from-file derivation)))))
(simple-format #t "finished submitting outputs, reporting result\n")
(submit-build-result
coordinator-uri uuid password build-id
`((result . success)
(outputs . ,(list->vector output-details))))))
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