services: boot: Take gexps instead of monadic gexps.

* gnu/services.scm (compute-boot-script): Rename 'mexps' to 'gexps' and
remove 'mlet' form.
(boot-service-type): Update comment.
(cleanup-gexp): Remove 'with-monad' and 'return'.
(activation-script): Rewrite in non-monadic style: use 'scheme-file'
instead of 'gexp->file'.
(gexps->activation-gexp): Remove 'mlet', return a gexp.
* gnu/services/shepherd.scm (shepherd-boot-gexp): Remove 'with-monad'
and 'return'.
* gnu/system.scm (operating-system-boot-script): Remove outdated comment.
* gnu/tests/base.scm (%cleanup-os): For 'dirty-service', remove
'with-monad' and 'return'.
master
Ludovic Courtès 2018-06-20 11:01:07 +02:00
parent 636bb2b5e3
commit 378daa8cb6
No known key found for this signature in database
GPG Key ID: 090B11993D9AEBB5
4 changed files with 100 additions and 112 deletions

View File

@ -337,15 +337,14 @@ containing the given entries."
turn refers to everything the operating system needs: its kernel, initrd,
system profile, boot script, and so on.")))
(define (compute-boot-script _ mexps)
;; Reverse MEXPS so that extensions appear in the boot script in the right
(define (compute-boot-script _ gexps)
;; Reverse GEXPS so that extensions appear in the boot script in the right
;; order. That is, user extensions would come first, and extensions added
;; by 'essential-services' (e.g., running shepherd) are guaranteed to come
;; last.
(mlet %store-monad ((gexps (sequence %store-monad (reverse mexps))))
(gexp->file "boot"
;; Clean up and activate the system, then spawn shepherd.
#~(begin #$@gexps))))
#~(begin #$@(reverse gexps))))
(define (boot-script-entry mboot)
"Return, as a monadic value, an entry for the boot script in the system
@ -354,9 +353,9 @@ directory."
(return `(("boot" ,boot)))))
(define boot-service-type
;; The service of this type is extended by being passed gexps as monadic
;; values. It aggregates them in a single script, as a monadic value, which
;; becomes its 'parameters'. It is the only service that extends nothing.
;; The service of this type is extended by being passed gexps. It
;; aggregates them in a single script, as a monadic value, which becomes its
;; value.
(service-type (name 'boot)
(extensions
(list (service-extension system-service-type
@ -372,11 +371,9 @@ by the initrd once the root file system is mounted.")))
(service boot-service-type #t))
(define (cleanup-gexp _)
"Return as a monadic value a gexp to clean up /tmp and similar places upon
boot."
(with-monad %store-monad
"Return a gexp to clean up /tmp and similar places upon boot."
(with-imported-modules '((guix build utils))
(return #~(begin
#~(begin
(use-modules (guix build utils))
;; Clean out /tmp and /var/run.
@ -413,7 +410,7 @@ boot."
(chmod "/tmp" #o1777)
(mkdir "/var/run")
(chmod "/var/run" #o755)
(delete-file-recursively "/run/udev/watch.old"))))))))
(delete-file-recursively "/run/udev/watch.old"))))))
(define cleanup-service-type
;; Service that cleans things up in /tmp and similar.
@ -432,14 +429,10 @@ ACTIVATION-SCRIPT-TYPE."
(define (activation-script gexps)
"Return the system's activation script, which evaluates GEXPS."
(define (service-activations)
;; Return the activation scripts for SERVICES.
(mapm %store-monad
(cut gexp->file "activate-service" <>)
gexps))
(define actions
(map (cut scheme-file "activate-service" <>) gexps))
(mlet* %store-monad ((actions (service-activations)))
(gexp->file "activate"
(scheme-file "activate"
(with-imported-modules (source-module-closure
'((gnu build activation)
(guix build utils)))
@ -464,12 +457,11 @@ ACTIVATION-SCRIPT-TYPE."
;; Run the services' activation snippets.
;; TODO: Use 'load-compiled'.
(for-each primitive-load '#$actions))))))
(for-each primitive-load '#$actions)))))
(define (gexps->activation-gexp gexps)
"Return a gexp that runs the activation script containing GEXPS."
(mlet %store-monad ((script (activation-script gexps)))
(return #~(primitive-load #$script))))
#~(primitive-load #$(activation-script gexps)))
(define (second-argument a b) b)

View File

@ -22,7 +22,6 @@
#:use-module (guix sets)
#:use-module (guix gexp)
#:use-module (guix store)
#:use-module (guix monads)
#:use-module (guix records)
#:use-module (guix derivations) ;imported-modules, etc.
#:use-module (gnu services)
@ -66,8 +65,7 @@
(define (shepherd-boot-gexp services)
(with-monad %store-monad
(return #~(begin
#~(begin
;; Keep track of the booted system.
(false-if-exception (delete-file "/run/booted-system"))
(symlink (readlink "/run/current-system")
@ -85,7 +83,7 @@
;; Start shepherd.
(execl #$(file-append shepherd "/bin/shepherd")
"shepherd" "--config"
#$(shepherd-configuration-file services))))))
#$(shepherd-configuration-file services))))
(define shepherd-root-service-type
(service-type

View File

@ -819,7 +819,6 @@ we're running in the final root. When CONTAINER? is true, skip all
hardware-related operations as necessary when booting a Linux container."
(let* ((services (operating-system-services os #:container? container?))
(boot (fold-services services #:target-type boot-service-type)))
;; BOOT is the script as a monadic value.
(service-value boot)))
(define (operating-system-user-accounts os)

View File

@ -484,7 +484,6 @@ in a loop. See <http://bugs.gnu.org/26931>.")
(simple-operating-system
(simple-service 'dirty-things
boot-service-type
(with-monad %store-monad
(let ((script (plain-file
"create-utf8-file.sh"
(string-append
@ -493,11 +492,11 @@ in a loop. See <http://bugs.gnu.org/26931>.")
"touch /witness\n"
"exec touch /tmp/λαμβδα"))))
(with-imported-modules '((guix build utils))
(return #~(begin
#~(begin
(setenv "PATH"
#$(file-append coreutils "/bin"))
(invoke #$(file-append bash "/bin/sh")
#$script)))))))))
#$script)))))))
(define (run-cleanup-test name)
(define os