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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 David Thompson <davet@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 (gnu services web)
+ #:use-module (gnu services)
+ #:use-module (gnu system shadow)
+ #:use-module (gnu packages admin)
+ #:use-module (gnu packages web)
+ #:use-module (guix records)
+ #:use-module (guix monads)
+ #:use-module (guix store)
+ #:use-module (guix gexp)
+ #:export (nginx-service))
+
+;;; Commentary:
+;;;
+;;; Web services.
+;;;
+;;; Code:
+
+(define (default-nginx-config log-directory run-directory)
+ (plain-file "nginx.conf"
+ (string-append
+ "user nginx nginx;\n"
+ "pid " run-directory "/pid;\n"
+ "error_log " log-directory "/error.log info;\n"
+ "http {\n"
+ " access_log " log-directory "/access.log;\n"
+ " root /var/www;\n"
+ " server {}\n"
+ "}\n"
+ "events {}\n")))
+
+(define* (nginx-service #:key (nginx nginx)
+ (log-directory "/var/log/nginx")
+ (run-directory "/var/run/nginx")
+ (config-file
+ (default-nginx-config log-directory run-directory)))
+ "Return a service that runs NGINX, the nginx web server.
+
+The nginx daemon loads its runtime configuration from CONFIG-FIGLE, stores log
+files in LOG-DIRECTORY, and stores temporary runtime files in RUN-DIRECTORY."
+ (define nginx-binary
+ #~(string-append #$nginx "/sbin/nginx"))
+
+ (define (nginx-action . args)
+ #~(lambda _
+ (zero?
+ (system* #$nginx-binary "-c" #$config-file #$@args))))
+
+ (define activate
+ #~(begin
+ (use-modules (guix build utils))
+ (format #t "creating nginx log directory '~a'~%" #$log-directory)
+ (mkdir-p #$log-directory)
+ (format #t "creating nginx run directory '~a'~%" #$run-directory)
+ (mkdir-p #$run-directory)
+ ;; Check configuration file syntax.
+ (system* #$nginx-binary "-c" #$config-file "-t")))
+
+ (define nologin #~(string-append #$shadow "/sbin/nologin"))
+
+ ;; TODO: Add 'reload' action.
+ (mbegin %store-monad
+ (return
+ (service
+ (provision '(nginx))
+ (documentation "Run the nginx daemon.")
+ (requirement '(user-processes loopback))
+ (start (nginx-action "-p" run-directory))
+ (stop (nginx-action "-s" "stop"))
+ (activate activate)
+ (user-groups (list (user-group
+ (name "nginx")
+ (system? #t))))
+ (user-accounts (list (user-account
+ (name "nginx")
+ (group "nginx")
+ (system? #t)
+ (comment "nginx server user")
+ (home-directory "/var/empty")
+ (shell nologin))))))))