Hi Mark and Andreas
Quoting from <https://yhetil.org/guix/871rc5jv1o....@netris.org>.
On Tue, 23 Mar 2021 at 19:42, Mark H Weaver <m...@netris.org> wrote:
> How about changing "guix package -A" and "guix package -s" to display
> information about the package's replacement, if it has one?
>
> Alternatively, those commands could somehow explicitly indicate that the
> package has been grafted, and show the version number of the
> replacement, in such a way that is less confusing to users.
The attached patch does that only for ’package->recutils’ (show and
search). For instance, note the ’replaced’ field for the grafted
package. (Obviously, it could be any other word than ’replaced’
compatible with the recutils record.)
--8<---------------cut here---------------start------------->8---
$ time ./pre-inst-env guix show zstd
name: zstd
version: 1.4.9
outputs: out lib static
systems: x86_64-linux i686-linux
dependencies:
location: gnu/packages/compression.scm:1473:2
homepage: https://facebook.github.io/zstd/
license: Modified BSD, FreeBSD, GPL 2, GPL 3+, Expat, Public Domain, Zlib
synopsis: Zstandard real-time compression algorithm
description: Zstandard (`zstd') is a lossless compression algorithm that
+ combines very fast operation with a compression ratio comparable to that of
+ zlib. In most scenarios, both compression and decompression can be performed
+ in ‘real time’. The compressor can be configured to provide the most suitable
+ trade-off between compression ratio and speed, without affecting decompression
+ speed.
name: zstd
version: 1.4.4
replaced: 1.4.9
outputs: out lib static
systems: x86_64-linux i686-linux
dependencies:
location: gnu/packages/compression.scm:1402:2
homepage: https://facebook.github.io/zstd/
license: Modified BSD, FreeBSD, GPL 2, GPL 3+, Expat, Public Domain, Zlib
synopsis: Zstandard real-time compression algorithm
description: Zstandard (`zstd') is a lossless compression algorithm that
+ combines very fast operation with a compression ratio comparable to that of
+ zlib. In most scenarios, both compression and decompression can be performed
+ in ‘real time’. The compressor can be configured to provide the most suitable
+ trade-off between compression ratio and speed, without affecting decompression
+ speed.
real 0m0.822s
user 0m1.039s
sys 0m0.057s
--8<---------------cut here---------------end--------------->8---
On my machine, it slows down from 0.5s to 0.8s; I do not know why.
How display such information for ’package -A’? The (selected) output
looks like:
--8<---------------cut here---------------start------------->8---
zstd 1.4.9 out,lib,static gnu/packages/compression.scm:1473:2
zstd 1.4.4 out,lib,static gnu/packages/compression.scm:1402:2
--8<---------------cut here---------------end--------------->8---
And it appears to me hard to add another field or add something to the
’1.4.4’ line. I mean, it would probably break some script. Maybe some
people use this format to pipe. I do not know.
WDYT?
Cheers,
simon
diff --git a/guix/ui.scm b/guix/ui.scm
index 7fbd4c63a2..b6497f5e5c 100644
--- a/guix/ui.scm
+++ b/guix/ui.scm
@@ -1528,9 +1528,18 @@ HYPERLINKS? is true, emit hyperlink escape sequences when appropriate."
(define (package<? p1 p2)
(string<? (package-full-name p1) (package-full-name p2)))
+ (define replacement
+ (package-replacement p))
+
;; Note: Don't i18n field names so that people can post-process it.
(format port "name: ~a~%" (package-name p))
(format port "version: ~a~%" (package-version p))
+ (when replacement
+ (unless
+ (string=?
+ (package-version p)
+ (package-version replacement))
+ (format port "replaced: ~a~%" (package-version replacement))))
(format port "outputs: ~a~%" (string-join (package-outputs p)))
(format port "systems: ~a~%"
(string-join (package-transitive-supported-systems p)))
