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09/11: derivations: Deprecate the previous calling convention.


From: guix-commits
Subject: 09/11: derivations: Deprecate the previous calling convention.
Date: Mon, 15 Jul 2019 04:18:17 -0400 (EDT)

civodul pushed a commit to branch master
in repository guix.

commit 93c2a0073945e8c3967cdb0e250d3341f7dcac71
Author: Ludovic Court├Ęs <address@hidden>
Date:   Wed Jul 10 18:18:19 2019 +0200

    derivations: Deprecate the previous calling convention.
    
    We will eventually require #:inputs to be a list of <derivation-input>;
    store items will have to be passed as #:sources, already interned.
    
    * guix/derivations.scm (warn-about-derivation-deprecation): New procedure.
    (derivation): Add #:%deprecation-warning? parameter.
    [warn-deprecation]: New macro.
    [input->derivation-input, input->source]: Use it.
    (build-expression->derivation): Pass #:%deprecation-warning?.
    * po/guix/POTFILES.in: Add guix/derivations.scm.
---
 guix/derivations.scm | 27 +++++++++++++++++++++++++--
 po/guix/POTFILES.in  |  1 +
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/guix/derivations.scm b/guix/derivations.scm
index a184785..23d058e 100644
--- a/guix/derivations.scm
+++ b/guix/derivations.scm
@@ -36,6 +36,8 @@
   #:use-module (guix memoization)
   #:use-module (guix combinators)
   #:use-module (guix deprecation)
+  #:use-module (guix diagnostics)
+  #:use-module (guix i18n)
   #:use-module (guix monads)
   #:use-module (gcrypt hash)
   #:use-module (guix base32)
@@ -705,6 +707,13 @@ name of each input with that input's hash."
        ;; character.
        (sha256 (derivation->bytevector (derivation/masked-inputs drv)))))))
 
+
+(define (warn-about-derivation-deprecation name)
+  ;; TRANSLATORS: 'derivation' must not be translated; it refers to the
+  ;; 'derivation' procedure.
+  (warning (G_ "in '~a': deprecated 'derivation' calling convention used~%")
+           name))
+
 (define* (derivation store name builder args
                      #:key
                      (system (%current-system)) (env-vars '())
@@ -715,7 +724,8 @@ name of each input with that input's hash."
                      allowed-references disallowed-references
                      leaked-env-vars local-build?
                      (substitutable? #t)
-                     (properties '()))
+                     (properties '())
+                     (%deprecation-warning? #t))
   "Build a derivation with the given arguments, and return the resulting
 <derivation> object.  When HASH and HASH-ALGO are given, a
 fixed-output derivation is created---i.e., one whose result is known in
@@ -832,19 +842,28 @@ derivation.  It is kept as-is, uninterpreted, in the 
derivation."
             e
             outputs)))
 
+  (define-syntax-rule (warn-deprecation name)
+    (when %deprecation-warning?
+      (warn-about-derivation-deprecation name)))
+
   (define input->derivation-input
     (match-lambda
       ((? derivation-input? input)
        input)
       (((? derivation? drv))
+       (warn-deprecation name)
        (make-derivation-input drv '("out")))
       (((? derivation? drv) sub-drvs ...)
+       (warn-deprecation name)
        (make-derivation-input drv sub-drvs))
-      (_ #f)))
+      (_
+       (warn-deprecation name)
+       #f)))
 
   (define input->source
     (match-lambda
       (((? string? input) . _)
+       (warn-deprecation name)
        (if (direct-store-path? input)
            input
            (add-to-store store (basename input)
@@ -1320,6 +1339,10 @@ and PROPERTIES."
                   ,@(if mod-dir `("-L" ,mod-dir) '())
                   ,builder)
 
+                ;; 'build-expression->derivation' is somewhat deprecated so
+                ;; don't bother warning here.
+                #:%deprecation-warning? #f
+
                 #:system system
 
                 #:inputs `((,(or guile-for-build (%guile-for-build)))
diff --git a/po/guix/POTFILES.in b/po/guix/POTFILES.in
index f5fc495..ad06ebc 100644
--- a/po/guix/POTFILES.in
+++ b/po/guix/POTFILES.in
@@ -80,6 +80,7 @@ guix/channels.scm
 guix/profiles.scm
 guix/git.scm
 guix/deprecation.scm
+guix/derivations.scm
 gnu/build/bootloader.scm
 nix/nix-daemon/guix-daemon.cc
 



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