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[bug#61363] [PATCH v3] self: Apply grafts to the outputs of the guix der


From: Christopher Baines
Subject: [bug#61363] [PATCH v3] self: Apply grafts to the outputs of the guix derivation.
Date: Mon, 17 Apr 2023 15:59:28 +0100

Rather than having grafts apply to the derivation itself. This moves grafting
here to work like grafting for packages, where you can think of the grafted
outputs as a transformed variant of the ungrafted outputs.

I'm looking at this as it'll allow the Guix Data Service to compute the
derivations without grafts, and for these to be useful for substitutes
regardless of whether users are using grafts.

* guix/self.scm (compiled-guix, guix-derivation): Add a #:graft? keyword
argument, to control grafting when computing the guix derivation.
* build-aux/build-self.scm (build-program): Call guix-derivation with
 #:graft? (%graft?) to make the compute-guix-derivation script use or not use
grafts as desired.

Signed-off-by: Christopher Baines <mail@cbaines.net>
---
 build-aux/build-self.scm |   4 +-
 guix/self.scm            | 101 +++++++++++++++++++++++++++++++--------
 2 files changed, 84 insertions(+), 21 deletions(-)

diff --git a/build-aux/build-self.scm b/build-aux/build-self.scm
index 02822a2ee8..6d0037f20c 100644
--- a/build-aux/build-self.scm
+++ b/build-aux/build-self.scm
@@ -353,7 +353,9 @@ (define fake-git
                                                   #:channel-metadata
                                                   '#$channel-metadata
                                                   #:pull-version
-                                                  #$pull-version)
+                                                  #$pull-version
+                                                  #:graft?
+                                                  #$(%graft?))
                                  #:system system))
                              derivation-file-name))))))
                   #:module-path (list source))))
diff --git a/guix/self.scm b/guix/self.scm
index 74c953bd50..bbc0beaca8 100644
--- a/guix/self.scm
+++ b/guix/self.scm
@@ -21,6 +21,7 @@ (define-module (guix self)
   #:use-module (guix config)
   #:use-module (guix modules)
   #:use-module (guix gexp)
+  #:use-module (guix grafts)
   #:use-module (guix store)
   #:use-module (guix monads)
   #:use-module (guix discovery)
@@ -31,6 +32,7 @@ (define-module (guix self)
   #:use-module ((guix build utils) #:select (find-files))
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-9)
+  #:use-module (srfi srfi-9 gnu)
   #:use-module (srfi srfi-35)
   #:use-module (ice-9 match)
   #:export (make-config.scm
@@ -243,6 +245,50 @@ (define* (file-append* item file #:key (recursive? #t))
      ;; which isn't great.
      (file-append item "/" file))))
 
+(define graft-derivation*
+  (store-lift graft-derivation))
+
+(define package-grafts*
+  (store-lift package-grafts))
+
+;; Apply grafts explicitly
+(define-immutable-record-type <explicit-grafting>
+  (%explicit-grafting obj packages)
+  explicit-grafting?
+  (obj      explicit-grafting-obj)       ;obj
+  (packages explicit-grafting-packages)) ;list of <package>s
+
+(define (write-explicit-grafting rec port)
+  (match rec
+    (($ <explicit-grafting> obj packages)
+     (format port "#<explicit-grafting ~s ~s>" obj packages))))
+
+(define (explicit-grafting obj packages)
+  (%explicit-grafting obj packages))
+
+(define-gexp-compiler (explicit-grafting-compiler (explicit-grafting 
<explicit-grafting>)
+                                                  system target)
+  (match explicit-grafting
+    (($ <explicit-grafting> obj packages)
+     (mlet* %store-monad ((drv (without-grafting
+                                (lower-object obj system #:target target)))
+                          (grafts
+                           (mapm %store-monad
+                                 (lambda (pkg)
+                                   (package-grafts* pkg system #:target 
target))
+                                 packages)))
+       (match (delete-duplicates
+               (concatenate grafts))
+         (()
+          (return drv))
+         (grafts
+          (mlet %store-monad ((guile (package->derivation
+                                      (guile-for-grafts)
+                                      system #:graft? #f)))
+            (graft-derivation* drv grafts
+                               #:system system
+                               #:guile guile))))))))
+
 (define* (locale-data source domain
                       #:optional (directory domain))
   "Return the locale data from 'po/DIRECTORY' in SOURCE, corresponding to
@@ -753,7 +799,8 @@ (define* (compiled-guix source #:key
                         (gzip (specification->package "gzip"))
                         (bzip2 (specification->package "bzip2"))
                         (xz (specification->package "xz"))
-                        (guix (specification->package "guix")))
+                        (guix (specification->package "guix"))
+                        (graft? #t))
   "Return a file-like object that contains a compiled Guix."
   (define guile-avahi
     (specification->package "guile-avahi"))
@@ -1023,25 +1070,34 @@ (define (built-modules node-subset)
                                                guile-lzma
                                                dependencies)
                                         #:guile guile-for-build
-                                        #:guile-version guile-version)))
-           (whole-package name modules dependencies
-                          #:command command
-                          #:guile guile-for-build
-
-                          ;; Include 'guix-daemon'.  XXX: Here we inject an
-                          ;; older snapshot of guix-daemon, but that's a good
-                          ;; enough approximation for now.
-                          #:daemon (specification->package "guix-daemon")
-
-                          #:info (info-manual source)
-                          #:miscellany (miscellaneous-files source)
-                          #:guile-version guile-version)))
+                                        #:guile-version guile-version))
+                (obj
+                 (whole-package name modules dependencies
+                                #:command command
+                                #:guile guile-for-build
+
+                                ;; Include 'guix-daemon'.  XXX: Here we inject
+                                ;; an older snapshot of guix-daemon, but
+                                ;; that's a good enough approximation for now.
+                                #:daemon (specification->package "guix-daemon")
+
+                                #:info (info-manual source)
+                                #:miscellany (miscellaneous-files source)
+                                #:guile-version guile-version)))
+           (if graft?
+               (explicit-grafting obj
+                                  (map (compose force cdr) %packages))
+               obj)))
         ((= 0 pull-version)
          ;; Legacy 'guix pull': return the .scm and .go files as one
          ;; directory.
-         (built-modules (lambda (node)
-                          (list (node-source node)
-                                (node-compiled node)))))
+         (let ((obj (built-modules (lambda (node)
+                                     (list (node-source node)
+                                           (node-compiled node))))))
+           (if graft?
+               (explicit-grafting obj
+                                  (map (compose force cdr) %packages))
+               obj)))
         (else
          ;; Unsupported 'guix pull' version.
          #f)))
@@ -1271,7 +1327,8 @@ (define (process-directory directory files output)
 (define* (guix-derivation source version
                           #:optional (guile-version (effective-version))
                           #:key (pull-version 0)
-                          channel-metadata)
+                          channel-metadata
+                          (graft? #t))
   "Return, as a monadic value, the derivation to build the Guix from SOURCE
 for GUILE-VERSION.  Use VERSION as the version string.  Use CHANNEL-METADATA
 as the channel metadata sexp to include in (guix config).
@@ -1308,7 +1365,11 @@ (define guile
                                #:pull-version pull-version
                                #:guile-version (if (>= pull-version 1)
                                                    "3.0" guile-version)
-                               #:guile-for-build guile)))
+                               #:guile-for-build guile
+                               #:graft? graft?)))
       (if guix
-          (lower-object guix)
+          (if graft?
+              (lower-object guix)
+              (without-grafting
+               (lower-object guix)))
           (return #f)))))
-- 
2.39.1






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