(define-module (gnu services science)
  #:export (<rshiny-configuration>
            rshiny-configuration
            rshiny-configuration?
            rshiny-configuration-package
            rshiny-configuration-binary
            rshiny-shepherd-service
            rshiny-service-type))

(use-modules (gnu)
             (guix records)
             (ice-9 match))
(use-service-modules shepherd)
(use-package-modules cran)

(define-record-type* <rshiny-configuration>
  rshiny-configuration
  make-rshiny-configuration
  rshiny-configuration?
  (package          rshiny-configuration-package    ; package
                    (default r-shiny))
  (binary           rshiny-configuration-binary     ; string
                    (default "rshiny")))

(define rshiny-shepherd-service
  (match-lambda
    (($ <rshiny-configuration> package binary)
     (list
       (shepherd-service
         (documentation (string-append "R-Shiny service for " binary))
         (provision (list (symbol-append 'rshiny- (string->symbol
                                                    (string-take binary 9)))))
         (requirement '(networking))
         (start
           #~(exec-command
               (list
                 #$(string-append "/run/current-system/profile/bin/" binary))
               ;#:log-file #$(string-append "/var/log/" binary ".log") ; kills shepherd
               #:environment-variables
               (list "R_LIBS_USER=/run/current-system/profile/site-library/")))
         (stop #~(make-kill-destructor)))))))

(define rshiny-service-type
  (service-type
    (name 'rshiny)
    (extensions
      (list
        (service-extension shepherd-root-service-type
                           rshiny-shepherd-service)
        (service-extension profile-service-type
                           ;; We want the package installed so that it
                           ;; pulls in the propagated inputs as well.
                           (lambda (config)
                             (list
                               (rshiny-configuration-package config))))))
    (description
     "Run an R-Shiny webapp as a Guix Service.")))
5f0dc4c09382cb8b3b93dc8cfae'>tests</a>/<a href='/guix/log/tests/gexp.scm?id=86ced7b27197d5f0dc4c09382cb8b3b93dc8cfae'>gexp.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/gexp.scm?id=86ced7b27197d5f0dc4c09382cb8b3b93dc8cfae&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-07-26 23:50:12 +0200'>2019-07-26</span></td><td><a href='/guix/commit/tests/gexp.scm?id=2e8cabb8d630a8423e2e5a3bf150c1c0310b945d'>gexp: 'program-file' honors the current system and cross-compilation target.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-15 10:01:05 +0200'>2019-07-15</span></td><td><a href='/guix/commit/tests/gexp.scm?id=b9373e262730578ba6c3805ffe44900f10bc655c'>gexp: 'lowered-gexp-guile' now returns a &lt;derivation-input&gt;.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-15 10:01:05 +0200'>2019-07-15</span></td><td><a href='/guix/commit/tests/gexp.scm?id=386857748097619b3b75a7bf93677b6aa742d03c'>gexp: &lt;lowered-gexp&gt; separates sources from derivation inputs.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-04 18:05:02 +0200'>2019-07-04</span></td><td><a href='/guix/commit/tests/gexp.scm?id=2ca41030d5189d83ea2a28ea64cf0e19efed5fd7'>gexp: Add 'lower-gexp' and express 'gexp-&gt;derivation' in terms of it.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>