archive: Add '--missing'.

* guix/scripts/archive.scm (show-help, %options): Add '--missing'.
  (guix-archive)[lines]: New procedure.
  Use it to honor '--missing'.
* tests/guix-archive.sh: Add tests.
* doc/guix.texi (Invoking guix archive): Document '--missing'.

1 files changed, 19 insertions, 1 deletions

diff --git a/tests/guix-archive.sh b/tests/guix-archive.sh
index 3ac618ae33c..0de7395145b 100644
--- a/tests/guix-archive.sh
+++ b/tests/guix-archive.sh
@@ -1,5 +1,5 @@
 # GNU Guix --- Functional package management for GNU
-# Copyright © 2013 Ludovic Courtès <ludo@gnu.org>
+# Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
 #
 # This file is part of GNU Guix.
 #
@@ -44,5 +44,23 @@ guix archive --import < "$archive" 2>&1 | grep "import.*guile-bootstrap"
 if guix archive something-that-does-not-exist
 then false; else true; fi
 
+# This one must not be listed as missing.
+guix build guile-bootstrap > "$archive"
+guix archive --missing < "$archive"
+test "`guix archive --missing < "$archive"`" = ""
+
+# Two out of three should be listed as missing.
+echo "$NIX_STORE_DIR/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo" >> "$archive"
+echo "$NIX_STORE_DIR/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-bar" >> "$archive"
+guix archive --missing < "$archive" > "$archive_alt"
+echo "$NIX_STORE_DIR/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo" > "$archive"
+echo "$NIX_STORE_DIR/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-bar" >> "$archive"
+cmp "$archive" "$archive_alt"
+
+# This is not a valid store file name, so an error.
+echo something invalid > "$archive"
+if guix archive --missing < "$archive"
+then false; else true; fi
+
 if echo foo | guix archive --authorize
 then false; else true; fi