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dnl -*- Autoconf -*- fragment for the C++ daemon.

AC_MSG_CHECKING([whether to build daemon])
AC_MSG_RESULT([$guix_build_daemon])

dnl C++ environment.  This macro must be used unconditionnaly.
AC_PROG_CXX
AM_PROG_AR
AC_LANG([C++])

if test "x$guix_build_daemon" = "xyes"; then

  GUIX_ASSERT_CXX11

  AC_PROG_RANLIB
  AC_CONFIG_HEADERS([nix/config.h])

  dnl Use 64-bit file system calls so that we can support files > 2 GiB.
  AC_SYS_LARGEFILE

  dnl Look for zlib, a required dependency.
  AC_CHECK_LIB([z], [gzdopen], [true],
    [AC_MSG_ERROR([Guix requires zlib.  See http://www.zlib.net/.])])
  AC_CHECK_HEADERS([zlib.h], [true],
    [AC_MSG_ERROR([Guix requires zlib.  See http://www.zlib.net/.])])

  dnl Look for libbz2, an optional dependency.
  AC_CHECK_LIB([bz2], [BZ2_bzWriteOpen], [HAVE_LIBBZ2=yes], [HAVE_LIBBZ2=no])
  if test "x$HAVE_LIBBZ2" = xyes; then
    AC_CHECK_HEADERS([bzlib.h])
    HAVE_LIBBZ2="$ac_cv_header_bzlib_h"
  fi

  dnl Look for SQLite, a required dependency.
  PKG_CHECK_MODULES([SQLITE3], [sqlite3 >= 3.6.19])

  AC_DEFINE_UNQUOTED([SYSTEM], ["$guix_system"],
    [Guix host system type--i.e., platform and OS kernel tuple.])

  case "$LIBGCRYPT_PREFIX" in
    no)
      LIBGCRYPT_CFLAGS=""
      ;;
    *)
      LIBGCRYPT_CFLAGS="-I$LIBGCRYPT_PREFIX/include"
      ;;
  esac

  case "$LIBGCRYPT_LIBDIR" in
    no | "")
      LIBGCRYPT_LIBS="-lgcrypt"
      ;;
    *)
      LIBGCRYPT_LIBS="-L$LIBGCRYPT_LIBDIR -lgcrypt"
      ;;
  esac

  AC_SUBST([LIBGCRYPT_CFLAGS])
  AC_SUBST([LIBGCRYPT_LIBS])

  save_CFLAGS="$CFLAGS"
  save_LDFLAGS="$LDFLAGS"
  CFLAGS="$CFLAGS $LIBGCRYPT_CFLAGS"
  LDFLAGS="$LDFLAGS $LIBGCRYPT_LDFLAGS"

  have_gcrypt=yes
  AC_CHECK_LIB([gcrypt], [gcry_md_open], [:], [have_gcrypt=no])
  AC_CHECK_HEADER([gcrypt.h], [:], [have_gcrypt=no])
  if test "x$have_gcrypt" != "xyes"; then
    AC_MSG_ERROR([GNU libgcrypt not found; please install it.])
  fi

  CFLAGS="$save_CFLAGS"
  LDFLAGS="$save_LDFLAGS"

  dnl Chroot support.
  AC_CHECK_FUNCS([chroot unshare])
  AC_CHECK_HEADERS([sched.h sys/param.h sys/mount.h sys/syscall.h])

  if test "x$ac_cv_func_chroot" != "xyes"; then
    AC_MSG_ERROR(['chroot' function missing, bailing out])
  fi

  dnl lutimes and lchown: used when canonicalizing store items.
  dnl posix_fallocate: used when extracting archives.
  dnl vfork: to speed up spawning of helper programs.
  dnl   `--> now disabled because of unpredictable behavior:
  dnl        see <http://lists.gnu.org/archive/html/guix-devel/2014-05/msg00036.html>
  dnl        and Nix commit f794465c (Nov. 2012).
  dnl sched_setaffinity: to improve RPC locality.
  dnl statvfs: to detect disk-full conditions.
  dnl strsignal: for error reporting.
  dnl statx: fine-grain 'stat' call, new in glibc 2.28.
  AC_CHECK_FUNCS([lutimes lchown posix_fallocate sched_setaffinity \
     statvfs nanosleep strsignal statx])

  dnl Check for <locale>.
  AC_LANG_PUSH(C++)
  AC_CHECK_HEADERS([locale])
  AC_LANG_POP(C++)


  dnl Check whether we have the `personality' syscall, which allows us
  dnl to do i686-linux builds on x86_64-linux machines.
  AC_CHECK_HEADERS([sys/personality.h])

  dnl Determine the appropriate default list of substitute URLs (GnuTLS
  dnl is required so we can default to 'https'.)
  GUIX_SUBSTITUTE_URLS="https://bordeaux.guix.gnu.org https://ci.guix.gnu.org"

  AC_MSG_CHECKING([for default substitute URLs])
  AC_MSG_RESULT([$GUIX_SUBSTITUTE_URLS])
  AC_SUBST([GUIX_SUBSTITUTE_URLS])

  AC_DEFINE_UNQUOTED([GUIX_SUBSTITUTE_URLS], ["$GUIX_SUBSTITUTE_URLS"],
    [Default list of substitute URLs used by 'guix-daemon'.])

  dnl Check for Guile-SSH, which is required by 'guix offload'.
  GUIX_CHECK_GUILE_SSH

  case "x$guix_cv_have_recent_guile_ssh" in
    xyes)
      guix_build_daemon_offload="yes"
      AC_DEFINE([HAVE_DAEMON_OFFLOAD_HOOK], [1],
	[Define if the daemon's 'offload' build hook is being built (requires Guile-SSH).])
      ;;
    *)
      guix_build_daemon_offload="no"
      ;;
  esac

  dnl Temporary directory used to store the daemon's data.
  GUIX_TEST_ROOT_DIRECTORY
  GUIX_TEST_ROOT="$ac_cv_guix_test_root"
  AC_SUBST([GUIX_TEST_ROOT])

  GUIX_CHECK_LOCALSTATEDIR
fi

AM_CONDITIONAL([HAVE_LIBBZ2], [test "x$HAVE_LIBBZ2" = "xyes"])
AM_CONDITIONAL([BUILD_DAEMON], [test "x$guix_build_daemon" = "xyes"])
AM_CONDITIONAL([BUILD_DAEMON_OFFLOAD],			\
  [test "x$guix_build_daemon" = "xyes"			\
   && test "x$guix_build_daemon_offload" = "xyes"])
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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015-2019, 2022 Ludovic Courtès <ludo@gnu.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/>.

(define-module (test-services)
  #:use-module (gnu services)
  #:use-module (gnu services herd)
  #:use-module (gnu services shepherd)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:use-module (srfi srfi-34)
  #:use-module (srfi srfi-64)
  #:use-module (ice-9 match))

(test-begin "services")

(test-equal "services, default value"
  '(42 123 234 error)
  (let* ((t1 (service-type (name 't1) (extensions '())
                           (description "")))
         (t2 (service-type (name 't2) (extensions '())
                           (description "")
                           (default-value 42))))
    (list (service-value (service t2))
          (service-value (service t2 123))
          (service-value (service t1 234))
          (guard (c ((missing-value-service-error? c) 'error))
            (service t1)))))

(test-assert "service-back-edges"
  (let* ((t1 (service-type (name 't1) (extensions '()) (description "")
                           (compose +) (extend *)))
         (t2 (service-type (name 't2) (description "")
                           (extensions
                            (list (service-extension t1 (const '()))))
                           (compose +) (extend *)))
         (t3 (service-type (name 't3) (description "")
                           (extensions
                            (list (service-extension t2 identity)
                                  (service-extension t1 list)))))
         (s1 (service t1 #t))
         (s2 (service t2 #t))
         (s3 (service t3 #t))
         (e  (service-back-edges (list s1 s2 s3))))
    (and (lset= eq? (e s1) (list s2 s3))
         (lset= eq? (e s2) (list s3))
         (null? (e s3)))))

(test-equal "fold-services"
  ;; Make sure 'fold-services' returns the right result.  The numbers come
  ;; from services of type T3; 'xyz 60' comes from the service of type T2,
  ;; where 60 = 15 × 4 = (1 + 2 + 3 + 4 + 5) × 4.
  '(initial-value 5 4 3 2 1 xyz 60)
  (let* ((t1 (service-type (name 't1) (extensions '()) (description "")
                           (compose concatenate)
                           (extend cons)))
         (t2 (service-type (name 't2) (description "")
                           (extensions
                            (list (service-extension t1
                                                     (cut list 'xyz <>))))
                           (compose (cut reduce + 0 <>))
                           (extend *)))
         (t3 (service-type (name 't3) (description "")
                           (extensions
                            (list (service-extension t2 identity)
                                  (service-extension t1 list)))))
         (r  (fold-services (cons* (service t1 'initial-value)
                                   (service t2 4)
                                   (map (lambda (x)
                                          (service t3 x))
                                        (iota 5 1)))
                            #:target-type t1)))
    (and (eq? (service-kind r) t1)
         (service-value r))))

(test-assert "fold-services, ambiguity"
  (let* ((t1 (service-type (name 't1) (extensions '()) (description "")
                           (compose concatenate)
                           (extend cons)))
         (t2 (service-type (name 't2) (description "")
                           (extensions
                            (list (service-extension t1 list)))))
         (s  (service t2 42)))
    (guard (c ((ambiguous-target-service-error? c)
               (and (eq? (ambiguous-target-service-error-target-type c)
                         t1)
                    (eq? (ambiguous-target-service-error-service c)
                         s))))
      (fold-services (list (service t1 'first)
                           (service t1 'second)
                           s)
                     #:target-type t1)
      #f)))

(test-assert "fold-services, missing target"
  (let* ((t1 (service-type (name 't1) (extensions '()) (description "")))
         (t2 (service-type (name 't2) (description "")
                           (extensions
                            (list (service-extension t1 list)))))
         (s  (service t2 42)))
    (guard (c ((missing-target-service-error? c)
               (and (eq? (missing-target-service-error-target-type c)
                         t1)
                    (eq? (missing-target-service-error-service c)
                         s))))
      (fold-services (list s) #:target-type t1)
      #f)))

(test-assert "instantiate-missing-services"
  (let* ((t1 (service-type (name 't1) (extensions '()) (description "")
                           (default-value 'dflt)
                           (compose concatenate)
                           (extend cons)))
         (t2 (service-type (name 't2) (description "")
                           (extensions
                            (list (service-extension t1 list)))))
         (s1 (service t1 'hey!))
         (s2 (service t2 42)))
    (and (lset= equal?
                (list (service t1) s2)
                (instantiate-missing-services (list s2)))
         (equal? (list s1 s2)
                 (instantiate-missing-services (list s1 s2))))))

(test-assert "instantiate-missing-services, indirect"
  (let* ((t1 (service-type (name 't1) (extensions '()) (description "")
                           (default-value 'dflt)
                           (compose concatenate)
                           (extend cons)))
         (t2 (service-type (name 't2) (description "")
                           (default-value 'dflt2)
                           (compose concatenate)
                           (extend cons)
                           (extensions
                            (list (service-extension t1 list)))))
         (t3 (service-type (name 't3) (description "")
                           (extensions
                            (list (service-extension t2 list)))))
         (s1 (service t1))
         (s2 (service t2))
         (s3 (service t3 42))
         (== (cut lset= equal? <...>)))
    (and (== (list s1 s2 s3)
             (instantiate-missing-services (list s3)))
         (== (list s1 s2 s3)
             (instantiate-missing-services (list s1 s3)))
         (== (list s1 s2 s3)
             (instantiate-missing-services (list s2 s3))))))

(test-assert "instantiate-missing-services, no default value"
  (let* ((t1 (service-type (name 't1) (extensions '()) (description "")))
         (t2 (service-type (name 't2) (description "")
                           (extensions
                            (list (service-extension t1 list)))))
         (s  (service t2 42)))
    (guard (c ((missing-target-service-error? c)
               (and (eq? (missing-target-service-error-target-type c)
                         t1)
                    (eq? (missing-target-service-error-service c)
                         s))))
      (instantiate-missing-services (list s))
      #f)))

(test-assert "shepherd-service-lookup-procedure"
  (let* ((s1 (shepherd-service (provision '(s1 s1b)) (start #f)))
         (s2 (shepherd-service (provision '(s2 s2b)) (start #f)))
         (s3 (shepherd-service (provision '(s3 s3b s3c)) (start #f)))
         (lookup (shepherd-service-lookup-procedure (list s1 s2 s3))))
    (and (eq? (lookup 's1) (lookup 's1b) s1)
         (eq? (lookup 's2) (lookup 's2b) s2)
         (eq? (lookup 's3) (lookup 's3b) s3))))

(test-assert "shepherd-service-back-edges"
  (let* ((s1 (shepherd-service (provision '(s1)) (start #f)))
         (s2 (shepherd-service (provision '(s2))
                               (requirement '(s1))
                               (start #f)))
         (s3 (shepherd-service (provision '(s3))
                               (requirement '(s1 s2))
                               (start #f)))
         (e  (shepherd-service-back-edges (list s1 s2 s3))))
    (and (lset= eq? (e s1) (list s2 s3))
         (lset= eq? (e s2) (list s3))
         (null? (e s3)))))

(test-equal "shepherd-service-upgrade: nothing to do"
  '(() ())
  (call-with-values
      (lambda ()
        (shepherd-service-upgrade '() '()))
    list))

(test-equal "shepherd-service-upgrade: one unchanged, one upgraded, one new"
  '(()                                            ;unload
    ((foo)))                                      ;restart
  (call-with-values
      (lambda ()
        ;; Here 'foo' is replaced and must be explicitly restarted later
        ;; because it is still running, whereas 'bar' is upgraded right away
        ;; because it is not currently running.  'baz' is loaded because it's
        ;; a new service.
        (shepherd-service-upgrade
         (list (live-service '(foo) '() #f #t)
               (live-service '(bar) '() #f #f)
               (live-service '(root) '() #f #t))     ;essential!
         (list (shepherd-service (provision '(foo))
                                 (start #t))
               (shepherd-service (provision '(bar))
                                 (start #t))
               (shepherd-service (provision '(baz))
                                 (start #t)))))
    (lambda (unload restart)
      (list (map live-service-provision unload)
            (map shepherd-service-provision restart)))))

(test-equal "shepherd-service-upgrade: service depended on is not unloaded"
  '(((baz))                                       ;unload
    ((foo)))                                      ;restart
  (call-with-values
      (lambda ()
        ;; Service 'bar' is not among the target services; yet, it must not be
        ;; unloaded because 'foo' depends on it.  'foo' gets replaced but it
        ;; must be restarted manually.
        (shepherd-service-upgrade
         (list (live-service '(foo) '(bar) #f #t)
               (live-service '(bar) '() #f #t)    ;still used!
               (live-service '(baz) '() #f #t))
         (list (shepherd-service (provision '(foo))
                                 (start #t)))))
    (lambda (unload restart)
      (list (map live-service-provision unload)
            (map shepherd-service-provision restart)))))

(test-equal "shepherd-service-upgrade: obsolete services that depend on each other"
  '(((foo) (bar) (baz))                           ;unload
    ())                                           ;restart
  (call-with-values
      (lambda ()
        ;; 'foo', 'bar', and 'baz' depend on each other, but all of them are
        ;; obsolete, and thus should be unloaded.
        (shepherd-service-upgrade
         (list (live-service '(foo) '(bar) #f #t) ;obsolete
               (live-service '(bar) '(baz) #f #t) ;obsolete
               (live-service '(baz) '() #f #t))   ;obsolete
         (list (shepherd-service (provision '(qux))
                                 (start #t)))))
    (lambda (unload restart)
      (list (map live-service-provision unload)
            (map shepherd-service-provision restart)))))

(test-equal "shepherd-service-upgrade: transient service"
  ;; Transient service must not be unloaded:
  ;; <https://issues.guix.gnu.org/54812>.
  '(((foo))                                       ;unload
    ((qux)))                                      ;restart
  (call-with-values
      (lambda ()
        (shepherd-service-upgrade
         (list (live-service '(sshd-42) '() #t 42) ;transient
               (live-service '(foo) '() #f #t)     ;obsolete
               (live-service '(qux) '() #f #t))    ;running
         (list (shepherd-service (provision '(qux))
                                 (start #t)))))
    (lambda (unload restart)
      (list (map live-service-provision unload)
            (map shepherd-service-provision restart)))))

(test-eq "lookup-service-types"
  system-service-type
  (and (null? (lookup-service-types 'does-not-exist-at-all))
       (match (lookup-service-types 'system)
         ((one) one)
         (x x))))

(test-end)