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 * gnu/system.scm (operating-system-boot-script): Remove outdated comment.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
parent
636bb2b5e3
commit
378daa8cb6
148
gnu/services.scm
148
gnu/services.scm
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@ -337,15 +337,14 @@ containing the given entries."
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turn refers to everything the operating system needs: its kernel, initrd,
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system profile, boot script, and so on.")))
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(define (compute-boot-script _ mexps)
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;; Reverse MEXPS so that extensions appear in the boot script in the right
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(define (compute-boot-script _ gexps)
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;; Reverse GEXPS so that extensions appear in the boot script in the right
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;; order. That is, user extensions would come first, and extensions added
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;; by 'essential-services' (e.g., running shepherd) are guaranteed to come
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;; last.
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(mlet %store-monad ((gexps (sequence %store-monad (reverse mexps))))
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(gexp->file "boot"
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;; Clean up and activate the system, then spawn shepherd.
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#~(begin #$@gexps))))
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(gexp->file "boot"
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;; Clean up and activate the system, then spawn shepherd.
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#~(begin #$@(reverse gexps))))
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(define (boot-script-entry mboot)
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"Return, as a monadic value, an entry for the boot script in the system
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@ -354,9 +353,9 @@ directory."
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(return `(("boot" ,boot)))))
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(define boot-service-type
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;; The service of this type is extended by being passed gexps as monadic
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;; values. It aggregates them in a single script, as a monadic value, which
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;; becomes its 'parameters'. It is the only service that extends nothing.
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;; The service of this type is extended by being passed gexps. It
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;; aggregates them in a single script, as a monadic value, which becomes its
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;; value.
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(service-type (name 'boot)
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(extensions
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(list (service-extension system-service-type
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@ -372,48 +371,46 @@ by the initrd once the root file system is mounted.")))
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(service boot-service-type #t))
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(define (cleanup-gexp _)
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"Return as a monadic value a gexp to clean up /tmp and similar places upon
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boot."
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(with-monad %store-monad
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(with-imported-modules '((guix build utils))
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(return #~(begin
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(use-modules (guix build utils))
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"Return a gexp to clean up /tmp and similar places upon boot."
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(with-imported-modules '((guix build utils))
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#~(begin
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(use-modules (guix build utils))
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;; Clean out /tmp and /var/run.
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;;
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;; XXX This needs to happen before service activations, so it
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;; has to be here, but this also implicitly assumes that /tmp
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;; and /var/run are on the root partition.
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(letrec-syntax ((fail-safe (syntax-rules ()
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((_ exp rest ...)
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(begin
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(catch 'system-error
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(lambda () exp)
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(const #f))
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(fail-safe rest ...)))
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((_)
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#t))))
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;; Ignore I/O errors so the system can boot.
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(fail-safe
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;; Remove stale Shadow lock files as they would lead to
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;; failures of 'useradd' & co.
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(delete-file "/etc/group.lock")
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(delete-file "/etc/passwd.lock")
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(delete-file "/etc/.pwd.lock") ;from 'lckpwdf'
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;; Clean out /tmp and /var/run.
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;;
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;; XXX This needs to happen before service activations, so it
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;; has to be here, but this also implicitly assumes that /tmp
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;; and /var/run are on the root partition.
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(letrec-syntax ((fail-safe (syntax-rules ()
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((_ exp rest ...)
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(begin
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(catch 'system-error
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(lambda () exp)
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(const #f))
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(fail-safe rest ...)))
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((_)
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#t))))
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;; Ignore I/O errors so the system can boot.
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(fail-safe
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;; Remove stale Shadow lock files as they would lead to
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;; failures of 'useradd' & co.
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(delete-file "/etc/group.lock")
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(delete-file "/etc/passwd.lock")
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(delete-file "/etc/.pwd.lock") ;from 'lckpwdf'
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;; Force file names to be decoded as UTF-8. See
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;; <https://bugs.gnu.org/26353>.
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(setenv "GUIX_LOCPATH"
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#+(file-append glibc-utf8-locales "/lib/locale"))
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(setlocale LC_CTYPE "en_US.utf8")
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(delete-file-recursively "/tmp")
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(delete-file-recursively "/var/run")
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;; Force file names to be decoded as UTF-8. See
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;; <https://bugs.gnu.org/26353>.
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(setenv "GUIX_LOCPATH"
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#+(file-append glibc-utf8-locales "/lib/locale"))
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(setlocale LC_CTYPE "en_US.utf8")
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(delete-file-recursively "/tmp")
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(delete-file-recursively "/var/run")
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(mkdir "/tmp")
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(chmod "/tmp" #o1777)
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(mkdir "/var/run")
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(chmod "/var/run" #o755)
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(delete-file-recursively "/run/udev/watch.old"))))))))
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(mkdir "/tmp")
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(chmod "/tmp" #o1777)
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(mkdir "/var/run")
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(chmod "/var/run" #o755)
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(delete-file-recursively "/run/udev/watch.old"))))))
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(define cleanup-service-type
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;; Service that cleans things up in /tmp and similar.
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@ -432,44 +429,39 @@ ACTIVATION-SCRIPT-TYPE."
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(define (activation-script gexps)
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"Return the system's activation script, which evaluates GEXPS."
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(define (service-activations)
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;; Return the activation scripts for SERVICES.
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(mapm %store-monad
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(cut gexp->file "activate-service" <>)
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gexps))
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(define actions
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(map (cut scheme-file "activate-service" <>) gexps))
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(mlet* %store-monad ((actions (service-activations)))
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(gexp->file "activate"
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(with-imported-modules (source-module-closure
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'((gnu build activation)
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(guix build utils)))
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#~(begin
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(use-modules (gnu build activation)
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(guix build utils))
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(scheme-file "activate"
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(with-imported-modules (source-module-closure
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'((gnu build activation)
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(guix build utils)))
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#~(begin
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(use-modules (gnu build activation)
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(guix build utils))
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;; Make sure the user accounting database exists. If it
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;; does not exist, 'setutxent' does not create it and
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;; thus there is no accounting at all.
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(close-port (open-file "/var/run/utmpx" "a0"))
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;; Make sure the user accounting database exists. If it
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;; does not exist, 'setutxent' does not create it and
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;; thus there is no accounting at all.
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(close-port (open-file "/var/run/utmpx" "a0"))
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;; Same for 'wtmp', which is populated by mingetty et
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;; al.
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(mkdir-p "/var/log")
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(close-port (open-file "/var/log/wtmp" "a0"))
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;; Same for 'wtmp', which is populated by mingetty et
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;; al.
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(mkdir-p "/var/log")
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(close-port (open-file "/var/log/wtmp" "a0"))
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;; Set up /run/current-system. Among other things this
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;; sets up locales, which the activation snippets
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;; executed below may expect.
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(activate-current-system)
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;; Set up /run/current-system. Among other things this
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;; sets up locales, which the activation snippets
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;; executed below may expect.
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(activate-current-system)
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;; Run the services' activation snippets.
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;; TODO: Use 'load-compiled'.
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(for-each primitive-load '#$actions))))))
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;; Run the services' activation snippets.
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;; TODO: Use 'load-compiled'.
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(for-each primitive-load '#$actions)))))
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(define (gexps->activation-gexp gexps)
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"Return a gexp that runs the activation script containing GEXPS."
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(mlet %store-monad ((script (activation-script gexps)))
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(return #~(primitive-load #$script))))
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#~(primitive-load #$(activation-script gexps)))
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(define (second-argument a b) b)
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@ -22,7 +22,6 @@
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#:use-module (guix sets)
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#:use-module (guix gexp)
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#:use-module (guix store)
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#:use-module (guix monads)
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#:use-module (guix records)
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#:use-module (guix derivations) ;imported-modules, etc.
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#:use-module (gnu services)
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@ -66,26 +65,25 @@
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(define (shepherd-boot-gexp services)
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(with-monad %store-monad
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(return #~(begin
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;; Keep track of the booted system.
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(false-if-exception (delete-file "/run/booted-system"))
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(symlink (readlink "/run/current-system")
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"/run/booted-system")
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#~(begin
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;; Keep track of the booted system.
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(false-if-exception (delete-file "/run/booted-system"))
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(symlink (readlink "/run/current-system")
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"/run/booted-system")
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;; Close any remaining open file descriptors to be on the safe
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;; side. This must be the very last thing we do, because
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;; Guile has internal FDs such as 'sleep_pipe' that need to be
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;; alive.
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(let loop ((fd 3))
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(when (< fd 1024)
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(false-if-exception (close-fdes fd))
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(loop (+ 1 fd))))
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;; Close any remaining open file descriptors to be on the safe
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;; side. This must be the very last thing we do, because
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;; Guile has internal FDs such as 'sleep_pipe' that need to be
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;; alive.
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(let loop ((fd 3))
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(when (< fd 1024)
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(false-if-exception (close-fdes fd))
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(loop (+ 1 fd))))
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;; Start shepherd.
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(execl #$(file-append shepherd "/bin/shepherd")
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"shepherd" "--config"
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#$(shepherd-configuration-file services))))))
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;; Start shepherd.
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(execl #$(file-append shepherd "/bin/shepherd")
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"shepherd" "--config"
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#$(shepherd-configuration-file services))))
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(define shepherd-root-service-type
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(service-type
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@ -819,7 +819,6 @@ we're running in the final root. When CONTAINER? is true, skip all
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hardware-related operations as necessary when booting a Linux container."
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(let* ((services (operating-system-services os #:container? container?))
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(boot (fold-services services #:target-type boot-service-type)))
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;; BOOT is the script as a monadic value.
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(service-value boot)))
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(define (operating-system-user-accounts os)
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@ -484,20 +484,19 @@ in a loop. See <http://bugs.gnu.org/26931>.")
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(simple-operating-system
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(simple-service 'dirty-things
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boot-service-type
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(with-monad %store-monad
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(let ((script (plain-file
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"create-utf8-file.sh"
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(string-append
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"echo $0: dirtying /tmp...\n"
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"set -e; set -x\n"
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"touch /witness\n"
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"exec touch /tmp/λαμβδα"))))
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(with-imported-modules '((guix build utils))
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(return #~(begin
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(setenv "PATH"
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#$(file-append coreutils "/bin"))
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(invoke #$(file-append bash "/bin/sh")
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#$script)))))))))
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(let ((script (plain-file
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"create-utf8-file.sh"
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(string-append
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"echo $0: dirtying /tmp...\n"
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"set -e; set -x\n"
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"touch /witness\n"
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"exec touch /tmp/λαμβδα"))))
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(with-imported-modules '((guix build utils))
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#~(begin
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(setenv "PATH"
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#$(file-append coreutils "/bin"))
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(invoke #$(file-append bash "/bin/sh")
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#$script)))))))
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(define (run-cleanup-test name)
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(define os
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