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From: =?UTF-8?q?Sergio=20Pastor=20P=C3=A9rez?= <sergio.pastorperez@HIDDEN>
To: 71941 <at> debbugs.gnu.org
Subject: [PATCH v2 2/2] guix: fix: slow `map-derivation' procedure
Date: Wed, 5 Feb 2025 13:29:34 +0100
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Implement caching to speed up computation.
Change-Id: I186e2a62f6655e3b0738dd6e0f628faccd8b855e
---
guix/derivations.scm | 108 +++++++++++++++++++++++--------------------
1 file changed, 58 insertions(+), 50 deletions(-)
diff --git a/guix/derivations.scm b/guix/derivations.scm
index 9c019a35bb..aa7f55ee92 100644
--- a/guix/derivations.scm
+++ b/guix/derivations.scm
@@ -1044,7 +1044,8 @@ (define* (map-derivation store drv mapping
((file . replacement)
(vhash-cons file replacement result))))
vlist-null
- mapping)))
+ mapping))
+ (computed-drvs (make-hash-table 100)))
(define rewritten-input
;; Rewrite the given input according to MAPPING, and return an input
;; in the format used in 'derivation' calls.
@@ -1060,55 +1061,62 @@ (define* (map-derivation store drv mapping
(derivation-input (loop drv) sub-drvs)))))))
(let loop ((drv drv))
- (let* ((inputs (map (cut rewritten-input <> loop)
- (derivation-inputs drv)))
- (initial (append-map derivation-input-output-paths
- (derivation-inputs drv)))
- (replacements (append-map input->output-paths inputs))
-
- ;; Sources typically refer to the output directories of the
- ;; original inputs, INITIAL. Rewrite them by substituting
- ;; REPLACEMENTS.
- (sources (map (lambda (source)
- (match (vhash-assoc source mapping)
- ((_ . replacement)
- replacement)
- (#f
- (if (file-is-directory? source)
- source
- (substitute-file source
- initial replacements)))))
- (derivation-sources drv)))
-
- ;; Now augment the lists of initials and replacements.
- (initial (append (derivation-sources drv) initial))
- (replacements (append sources replacements))
- (name (store-path-package-name
- (string-drop-right (derivation-file-name drv)
- 4))))
- (derivation store name
- (substitute (derivation-builder drv)
- initial replacements)
- (map (cut substitute <> initial replacements)
- (derivation-builder-arguments drv))
- #:system system
- #:env-vars (map (match-lambda
- ((var . value)
- `(,var
- . ,(substitute value initial
- replacements))))
- (derivation-builder-environment-vars drv))
- #:inputs (filter derivation-input? inputs)
- #:sources (append sources (filter string? inputs))
- #:outputs (derivation-output-names drv)
- #:hash (match (derivation-outputs drv)
- ((($ <derivation-output> _ algo hash))
- hash)
- (_ #f))
- #:hash-algo (match (derivation-outputs drv)
- ((($ <derivation-output> _ algo hash))
- algo)
- (_ #f)))))))
+ (let ((cached-drv (hash-ref computed-drvs drv)))
+ (if cached-drv
+ cached-drv
+ (let* ((inputs (map (cut rewritten-input <> loop)
+ (derivation-inputs drv)))
+ (initial (append-map derivation-input-output-paths
+ (derivation-inputs drv)))
+ (replacements (append-map input->output-paths inputs))
+
+ ;; Sources typically refer to the output directories of the
+ ;; original inputs, INITIAL. Rewrite them by substituting
+ ;; REPLACEMENTS.
+ (sources (map (lambda (source)
+ (match (vhash-assoc source mapping)
+ ((_ . replacement)
+ replacement)
+ (#f
+ (if (file-is-directory? source)
+ source
+ (substitute-file source
+ initial replacements)))))
+ (derivation-sources drv)))
+
+ ;; Now augment the lists of initials and replacements.
+ (initial (append (derivation-sources drv) initial))
+ (replacements (append sources replacements))
+ (name (store-path-package-name
+ (string-drop-right (derivation-file-name drv)
+ 4))))
+
+ (hash-set!
+ computed-drvs
+ drv
+ (derivation store name
+ (substitute (derivation-builder drv)
+ initial replacements)
+ (map (cut substitute <> initial replacements)
+ (derivation-builder-arguments drv))
+ #:system system
+ #:env-vars (map (match-lambda
+ ((var . value)
+ `(,var
+ . ,(substitute value initial
+ replacements))))
+ (derivation-builder-environment-vars drv))
+ #:inputs (filter derivation-input? inputs)
+ #:sources (append sources (filter string? inputs))
+ #:outputs (derivation-output-names drv)
+ #:hash (match (derivation-outputs drv)
+ ((($ <derivation-output> _ algo hash))
+ hash)
+ (_ #f))
+ #:hash-algo (match (derivation-outputs drv)
+ ((($ <derivation-output> _ algo hash))
+ algo)
+ (_ #f))))))))))
;;;
--
2.48.1
sergio.pastorperez@HIDDEN, guix@HIDDEN, dev@HIDDEN, ludo@HIDDEN, othacehe@HIDDEN, zimon.toutoune@HIDDEN, me@HIDDEN, bug-guix@HIDDEN:bug#71941; Package guix.
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From: =?UTF-8?q?Sergio=20Pastor=20P=C3=A9rez?= <sergio.pastorperez@HIDDEN>
To: 71941 <at> debbugs.gnu.org
Subject: [PATCH v2 1/2] guix: fix map-derivation not handling directories
Date: Wed, 5 Feb 2025 13:29:33 +0100
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The `map-derivation` procedure was trying to process directories as files.
When a derivation had a 'module import' directory as input, it threw an
exception since it tried to open it as a file.
Change-Id: I9b766f9aaa03ea9307f73e8abb36bc347af4b5e6
---
guix/derivations.scm | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/guix/derivations.scm b/guix/derivations.scm
index bef98cd26a..9c019a35bb 100644
--- a/guix/derivations.scm
+++ b/guix/derivations.scm
@@ -1074,8 +1074,10 @@ (define* (map-derivation store drv mapping
((_ . replacement)
replacement)
(#f
- (substitute-file source
- initial replacements))))
+ (if (file-is-directory? source)
+ source
+ (substitute-file source
+ initial replacements)))))
(derivation-sources drv)))
;; Now augment the lists of initials and replacements.
base-commit: d0dbba3053123ee623d8a5889f1a0946859a205e
--
2.48.1
sergio.pastorperez@HIDDEN, guix@HIDDEN, dev@HIDDEN, ludo@HIDDEN, othacehe@HIDDEN, zimon.toutoune@HIDDEN, me@HIDDEN, bug-guix@HIDDEN:bug#71941; Package guix.
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From: =?UTF-8?q?Sergio=20Pastor=20P=C3=A9rez?= <sergio.pastorperez@HIDDEN>
To: 71941 <at> debbugs.gnu.org
Subject: [PATCH] guix: fix map-derivation not handling directories
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Cc: =?UTF-8?q?Sergio=20Pastor=20P=C3=A9rez?= <sergio.pastorperez@HIDDEN>
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The `map-derivation` procedure was trying to process directories as files.
When a derivation had a 'module import' directory as input, it threw an
exception since it tried to open it as a file.
Change-Id: I9b766f9aaa03ea9307f73e8abb36bc347af4b5e6
---
Hi, as far as I know 'module import' directories don't contain derivation
references, so it should not be needed to apply `substitute-file` on the files of
those directories. This fix just returns the 'module import' directories
untouched. Thoughts?
Note that `map-derivation` is very slow. I could only test it with tiny
derivations, such as the ones provided in the '(gnu packages commencement)'
module.
You can test it with:
--8<---------------cut here---------------start------------->8---
scheme@(guix-user)> (use-modules (guix store)
(guix packages)
(guix derivations)
(gnu packages games)
(gnu packages bootstrap))
scheme@(guix-user)> (with-store store
(let ((bootar-drv (package-derivation store (@@ (gnu packages commencement) bootar)))
(guile-bootstrap-drv (package-derivation store %bootstrap-guile))
(cowsay-drv (package-derivation store cowsay)))
(map-derivation store
bootar-drv
`((,guile-bootstrap-drv . ,cowsay-drv)))))
$1 = #<derivation /gnu/store/qwn18yxc1ccdxq1mgg863lfxsfwng3wk-bootar-1b.drv => /gnu/store/852xy3bhck2sd1hq1rmzai0px7fplxfq-bootar-1b 7fcfc3f05b90>
scheme@(guix-user)> (derivation-inputs $1)
$2 = (#<<derivation-input> drv: #<derivation /gnu/store/5rx5dn2xnkjs3q0rzpm66q79ndwrafp7-module-import-compiled.drv => /gnu/store/472plnlfm8yrb3axwy16fydq01idbkv1-module-import-compiled 7fcfc3f05d70> sub-derivations: ("out")> #<<derivation-input> drv: #<derivation /gnu/store/fhqh9f3lmf8wd9mh0bzavpkjnmsb0bg0-cowsay-3.7.0.drv => /gnu/store/vwa9vh21l68ivnwxj18s2gxd1v71w43r-cowsay-3.7.0 7fcfb73a50f0> sub-derivations: ("out")> #<<derivation-input> drv: #<derivation /gnu/store/k6852ja7cvdvbbdxh24ph711gm74m3qq-bootar-1b.ses.drv => /gnu/store/xmw3h03svpw6rwfg03f0m608zkm24qx8-bootar-1b.ses 7fcfc3f05f00> sub-derivations: ("out")>)
--8<---------------cut here---------------end--------------->8---
As you can see, with this fix, the new derivation has the `cowsay` package a an
input.
I would like to encourage people to discuss ways to improve the performance of
this procedure. It would be very useful for system wide package rewriting as
discussed in this thread[1].
[1]: https://lists.gnu.org/archive/html/guix-devel/2024-06/msg00275.html
Regards,
Sergio.
guix/derivations.scm | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/guix/derivations.scm b/guix/derivations.scm
index a91c1ae984..c16e1c2be3 100644
--- a/guix/derivations.scm
+++ b/guix/derivations.scm
@@ -1062,8 +1062,10 @@ (define* (map-derivation store drv mapping
((_ . replacement)
replacement)
(#f
- (substitute-file source
- initial replacements))))
+ (if (file-is-directory? source)
+ source
+ (substitute-file source
+ initial replacements)))))
(derivation-sources drv)))
;; Now augment the lists of initials and replacements.
base-commit: e1c92c98f7afff13fb7060199ba0dd4d9c5c2c53
--
2.45.2
sergio.pastorperez@HIDDEN, guix@HIDDEN, dev@HIDDEN, ludo@HIDDEN, othacehe@HIDDEN, zimon.toutoune@HIDDEN, me@HIDDEN, bug-guix@HIDDEN:bug#71941; Package guix.
Full text available.
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From: =?utf-8?Q?Sergio_Pastor_P=C3=A9rez?= <sergio.pastorperez@HIDDEN>
To: bug-guix@HIDDEN
Subject: Broken `map-derivation' procedure
Date: Thu, 04 Jul 2024 16:59:55 +0200
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Hello.
The procedure `map-derivation` from `(guix derivations)` seems broken.
Evaluating this yields an error, it probably shouldn't:
--8<---------------cut here---------------start------------->8---
scheme@(guix-user)> (use-modules (guix)
(guix derivations)
(gnu packages)
(gnu packages perl)
(gnu packages games))
scheme@(guix-user)> (with-store store
(let ((cowsay-drv (package-derivation store cowsay))
(perl-drv (package-derivation store perl))
(perl-5.6-drv (package-derivation store perl-5.6)))
(map-derivation store
cowsay-drv
`((,perl-drv . ,perl-5.6-drv)))))
ice-9/boot-9.scm:1685:16: In procedure raise-exception:
In procedure fport_read: Is a directory
Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue.
scheme@(guix-user) [1]>
--8<---------------cut here---------------end--------------->8---
If you inspect the `cowsay` derivation, you will see that the mapping
should be possible since it contains the `perl` derivation.
Does anyone have an idea on what could be the issue or how to investigate
further?
Thanks,
Sergio.
Sergio Pastor Pérez <sergio.pastorperez@HIDDEN>:bug-guix@HIDDEN.
Full text available.bug-guix@HIDDEN:bug#71941; Package guix.
Full text available.
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.