[bug#36404] [PATCH v4 3/4] Add 'guix deploy'.

[zerodaysfordays@sdf.lonestar.org (Jakob L. Kreuze)]

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* guix/scripts/deploy.scm: New file.
* Makefile.am (MODULES): Add it.
---
 Makefile.am             |  1 +
 guix/scripts/deploy.scm | 90 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 91 insertions(+)
 create mode 100644 guix/scripts/deploy.scm

diff --git a/Makefile.am b/Makefile.am
index f10c000ea..4d3024e58 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -267,6 +267,7 @@ MODULES =					\
   guix/scripts/weather.scm			\
   guix/scripts/container.scm			\
   guix/scripts/container/exec.scm		\
+  guix/scripts/deploy.scm			\
   guix.scm					\
   $(GNU_SYSTEM_MODULES)
 
diff --git a/guix/scripts/deploy.scm b/guix/scripts/deploy.scm
new file mode 100644
index 000000000..4fb1babe8
--- /dev/null
+++ b/guix/scripts/deploy.scm
@@ -0,0 +1,90 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2019 David Thompson <davet@gnu.org>
+;;; Copyright © 2019 Jakob L. Kreuze <zerodaysfordays@sdf.lonestar.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 (guix scripts deploy)
+  #:use-module (gnu machine)
+  #:use-module (guix scripts)
+  #:use-module (guix scripts build)
+  #:use-module (guix store)
+  #:use-module (guix ui)
+  #:use-module (ice-9 format)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-37)
+  #:export (guix-deploy))
+
+;;; Commentary:
+;;;
+;;; This program provides a command-line interface to (gnu machine), allowing
+;;; users to perform remote deployments through specification files.
+;;;
+;;; Code:
+
+\f
+
+(define (show-help)
+  (display (G_ "Usage: guix deploy [OPTION] FILE...
+Perform the deployment specified by FILE.\n"))
+  (show-build-options-help)
+  (newline)
+  (display (G_ "
+  -h, --help             display this help and exit"))
+  (display (G_ "
+  -V, --version          display version information and exit"))
+  (newline)
+  (show-bug-report-information))
+
+(define %options
+  (cons* (option '(#\h "help") #f #f
+                 (lambda args
+                   (show-help)
+                   (exit 0)))
+         %standard-build-options))
+
+(define %default-options
+  '((system . ,(%current-system))
+    (substitutes? . #t)
+    (build-hook? . #t)
+    (graft? . #t)
+    (debug . 0)
+    (verbosity . 2)))
+
+(define (load-source-file file)
+  "Load FILE as a user module."
+  (let ((module (make-user-module '((gnu) (gnu machine) (gnu machine ssh)))))
+    (load* file module)))
+
+(define (guix-deploy . args)
+  (define (handle-argument arg result)
+    (alist-cons 'file arg result))
+  (let* ((opts (parse-command-line args %options (list %default-options)
+                                   #:argument-handler handle-argument))
+         (file (assq-ref opts 'file))
+         (machines (or (and file (load-source-file file)) '())))
+    (with-store store
+      (set-build-options-from-command-line store opts)
+      (for-each (lambda (machine)
+                  (format #t "building ~a... " (machine-display-name machine))
+                  (run-with-store store (build-machine machine))
+                  (display "done\n"))
+                machines)
+      (for-each (lambda (machine)
+                  (format #t "deploying to ~a... " (machine-display-name machine))
+                  (run-with-store store (deploy-machine machine))
+                  (display "done\n"))
+                machines))))
-- 
2.22.0


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