bug#66358: Can't import package using archive command

[Simon Tournier <zimon.toutoune@gmail.com>]

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Hi,

On Mon, 09 Oct 2023 at 14:25, Tobias Geerinckx-Rice via Bug reports for GNU Guix <bug-guix@gnu.org> wrote:

> I think it would be less surprising if these ‘single, mutually exclusive 
> actions’ should always be (sub)subcommands, e.g., ‘guix archive import’, 
> ‘guix archive authorize’, …

I am proposing to error for ambiguous cases as,

    $ ./pre-inst-env guix archive --import --authorize hello < /tmp/hello.nar
    guix archive: error: ambiguous options: "authorize" with "import"

See attached patch.  WDYT?

Please note that it errors when at least 2 options are ambiguous.  So if
there is 3, you get the “two first ones“.

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix archive --import --export --authorize hello < /tmp/hello.nar
guix archive: error: ambiguous options: "export" with "import"
--8<---------------cut here---------------end--------------->8---

Well, if the idea is fine, then maybe it could be worth to add one or
two sentences in the manual.

Cheers,
simon


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From 673afe0384427bc92fa47870e1dfa092e04aec0b Mon Sep 17 00:00:00 2001
Message-Id: <673afe0384427bc92fa47870e1dfa092e04aec0b.1697066456.git.zimon.toutoune@gmail.com>
From: Simon Tournier <zimon.toutoune@gmail.com>
Date: Thu, 12 Oct 2023 01:16:53 +0200
Subject: [PATCH] scripts: archive: Check compatibility of command line
 options.

Fixes <https://issues.guix.gnu.org/66358>.
Reported by Perry, Daniel J <dperry45@gatech.edu>.

* guix/scripts/archive.scm (compatible-option): New procedure.
(%options): Use it.
---
 guix/scripts/archive.scm | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/guix/scripts/archive.scm b/guix/scripts/archive.scm
index e32f22ec99..65932ae152 100644
--- a/guix/scripts/archive.scm
+++ b/guix/scripts/archive.scm
@@ -1,6 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2013, 2014, 2015, 2016, 2017, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2020 Tobias Geerinckx-Rice <me@tobias.gr>
+;;; Copyright © 2023 Simon Tournier <zimon.toutoune@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -115,6 +116,18 @@ (define %key-generation-parameters
       "(genkey (ecdsa (curve Ed25519) (flags rfc6979)))"
       "(genkey (rsa (nbits 4:4096)))"))
 
+(define (compatible-option action result other-actions)
+  "Return the RESULT if ACTION is compatible with the list of OTHER-ACTIONS."
+  (let ((other-action (fold (lambda (other answer)
+                              (if (assoc-ref result (string->symbol other))
+                                  other
+                                  answer))
+                            #f
+                            other-actions)))
+    (if other-action
+        (leave (G_ "ambiguous options: ~s with ~s~%") action other-action)
+        (alist-cons (string->symbol action) #t result))))
+
 (define %options
   ;; Specifications of the command-line options.
   (cons* (option '(#\h "help") #f #f
@@ -126,13 +139,13 @@ (define %options
                    (show-version-and-exit "guix archive")))
          (option '("export") #f #f
                  (lambda (opt name arg result)
-                   (alist-cons 'export #t result)))
+                   (compatible-option "export" result (list "import" "authorize"))))
          (option '(#\r "recursive") #f #f
                  (lambda (opt name arg result)
                    (alist-cons 'export-recursive? #t result)))
          (option '("import") #f #f
                  (lambda (opt name arg result)
-                   (alist-cons 'import #t result)))
+                   (compatible-option "import" result (list "export" "authorize"))))
          (option '("missing") #f #f
                  (lambda (opt name arg result)
                    (alist-cons 'missing #t result)))
@@ -158,7 +171,7 @@ (define %options
                               (error-string err))))))
          (option '("authorize") #f #f
                  (lambda (opt name arg result)
-                   (alist-cons 'authorize #t result)))
+                   (compatible-option "authorize" result (list "import" "export"))))
 
          (option '(#\S "source") #f #f
                  (lambda (opt name arg result)

base-commit: 0024ef320eed89468369ece3df05064a2afaabd1
-- 
2.38.1