;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2017 Jan Nieuwenhuizen <janneke@gnu.org>
;;; Copyright © 2018, 2019 Clément Lassieur <clement@lassieur.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 file defines build jobs for the Hydra continuation integration
;;; tool.
;;;

(use-modules (guix inferior) (guix channels)
             (guix)
             (guix ui)
             (srfi srfi-1)
             (ice-9 match))

;; XXX: Debugging hack: since `hydra-eval-guile-jobs' redirects the output
;; port to the bit bucket, let us write to the error port instead.
(setvbuf (current-error-port) _IOLBF)
(set-current-output-port (current-error-port))

(define (find-current-checkout arguments)
  "Find the first checkout of ARGUMENTS that provided the current file.
Return #f if no such checkout is found."
  (let ((current-root
         (canonicalize-path
          (string-append (dirname (current-filename)) "/../.."))))
    (find (lambda (argument)
            (and=> (assq-ref argument 'file-name)
                   (lambda (name)
                     (string=? name current-root)))) arguments)))

(define (hydra-jobs store arguments)
  "Return a list of jobs where each job is a NAME/THUNK pair."

  (define checkout
    (find-current-checkout arguments))

  (define commit
    (assq-ref checkout 'revision))

  (define source
    (assq-ref checkout 'file-name))

  (define instance
    (checkout->channel-instance source #:commit commit))

  (define derivation
    ;; Compute the derivation of Guix for COMMIT.
    (run-with-store store
      (channel-instances->derivation (list instance))))

  (show-what-to-build store (list derivation))
  (build-derivations store (list derivation))

  ;; Open an inferior for the just-built Guix.
  (let ((inferior (open-inferior (derivation->output-path derivation))))
    (inferior-eval '(use-modules (gnu ci) (ice-9 match)) inferior)

    (map (match-lambda
           ((name . fields)
            ;; Hydra expects a thunk, so here it is.
            (cons name (lambda () fields))))
         (inferior-eval-with-store
          inferior store
          `(lambda (store)
             (map (match-lambda
                    ((name . thunk)
                     (cons name (thunk))))
                  (hydra-jobs store '((superior-guix-checkout . ,checkout)
                                      ,@arguments))))))))
M*.
* gnu/packages/ruby.scm (ruby-permutation, ruby-blankslate)
(ruby-minitest-pretty-diff, ruby-guard, ruby-rb-inotify, ruby-tins)
(ruby-gem-hadar, ruby-term-ansicolor, ruby-json-pure)
(ruby-activesupport, ruby-redcloth, ruby-netrc, ruby-unf-ext, ruby-yard)
(ruby-turn, ruby-sqlite3, ruby-shoulda-context, ruby-shoulda-matchers)
(ruby-shoulda, ruby-httpclient, ruby-ansi, ruby-bio-commandeer)
(ruby-rubytest, ruby-brass, ruby-qed, ruby-ae, ruby-lemon, ruby-hashery)
(ruby-rc4, ruby-concurrent)[arguments]: Likewise.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-08-11 00:21:00 +0200'>2017-08-11</span></td><td><a href='/guix/commit/gnu/packages/rails.scm?id=eec0c587af5fbc2854104c4f540cf8982dab806b'>gnu: ruby-debug-inspector: Update to 0.0.3.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ruby.scm (ruby-debug-inspector): Update to 0.0.3.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2016-08-10 15:36:33 +1000'>2016-08-10</span></td><td><a href='/guix/commit/gnu/packages/rails.scm?id=29f49403a9b34899a5eeeffac3cca50217955c4f'>gnu: ruby-spring: Update to 1.7.2.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/rails.scm (ruby-spring): Update to 1.7.2.
</span></span></td><td>Ben Woodcroft</td></tr>
<tr><td><span title='2016-06-04 09:16:07 +1000'>2016-06-04</span></td><td><a href='/guix/commit/gnu/packages/rails.scm?id=3aeb6e1d1acfeeae61739fbaeeb6e94848557436'>gnu: Add ruby-spring.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/rails.scm (ruby-spring): New variable.
</span></span></td><td>Matthew Jordan</td></tr>
<tr><td><span title='2016-06-04 09:15:57 +1000'>2016-06-04</span></td><td><a href='/guix/commit/gnu/packages/rails.scm?id=90322fdbe3c60a039224ceded296fc772f4b642e'>gnu: Add ruby-debug-inspector.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* gnu/packages/rails.scm: New file.
</span></span></td><td>Matthew Jordan</td></tr>