scripts: Add 'container' subcommand.

* guix/scripts/container.scm: New file.
* guix/scripts/container/exec.scm: New file.
* po/guix/POTFILES.in: Add them.
* Makefile.am (MODULES): Add them.
* doc/guix.texi (Invoking guix container): New section.

1 files changed, 63 insertions, 0 deletions

diff --git a/guix/scripts/container.scm b/guix/scripts/container.scm
new file mode 100644
index 0000000000..cd9f345b68
--- /dev/null
+++ b/guix/scripts/container.scm
@@ -0,0 +1,63 @@
+;;; 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 (guix scripts container)
+  #:use-module (ice-9 match)
+  #:use-module (guix ui)
+  #:export (guix-container))
+
+(define (show-help)
+  (display (_ "Usage: guix container ACTION ARGS...
+Build and manipulate Linux containers.\n"))
+  (newline)
+  (display (_ "The valid values for ACTION are:\n"))
+  (newline)
+  (display (_ "\
+   exec            execute a command inside of an existing container\n"))
+  (newline)
+  (display (_ "
+  -h, --help             display this help and exit"))
+  (display (_ "
+  -V, --version          display version information and exit"))
+  (newline)
+  (show-bug-report-information))
+
+(define %actions '("exec"))
+
+(define (resolve-action name)
+  (let ((module (resolve-interface
+                 `(guix scripts container ,(string->symbol name))))
+        (proc (string->symbol (string-append "guix-container-" name))))
+    (module-ref module proc)))
+
+(define (guix-container . args)
+  (with-error-handling
+    (match args
+      (()
+       (format (current-error-port)
+               (_ "guix container: missing action~%")))
+      ((or ("-h") ("--help"))
+       (show-help)
+       (exit 0))
+      (("--version")
+       (show-version-and-exit "guix container"))
+      ((action args ...)
+       (if (member action %actions)
+           (apply (resolve-action action) args)
+           (format (current-error-port)
+                   (_ "guix container: invalid action~%")))))))