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Add support for fixed-output derivations.

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* guix/derivations.scm (read-derivation)[outputs->alist]: For
  fixed-outputs, convert HASH with `base16-string->bytevector'.
  (write-derivation): Likewise, convert HASH-ALGO to a string and HASH
  to a base16 string.
  (derivation-hash): Expect HASH to be a bytevector, not a string;
  convert HASH with `bytevector->base16-string'.

* tests/derivations.scm ("fixed-output derivation"): New test.
This commit is contained in:
Ludovic Courtès 2012-06-09 18:49:19 +02:00
parent 6d800a80ea
commit 749c656755
2 changed files with 25 additions and 6 deletions
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16
guix/derivations.scm
View file

@ -74,7 +74,7 @@ (define-record-type <derivation-output>
derivation-output?
(path derivation-output-path) ; store path
(hash-algo derivation-output-hash-algo) ; symbol | #f
(hash derivation-output-hash)) ; symbol | #f
(hash derivation-output-hash)) ; bytevector | #f
(define-record-type <derivation-input>
(make-derivation-input path sub-derivations)
@ -112,7 +112,8 @@ (define (outputs->alist x)
result))
((name path hash-algo hash)
;; fixed-output
(let ((algo (string->symbol hash-algo)))
(let ((algo (string->symbol hash-algo))
(hash (base16-string->bytevector hash)))
(alist-cons name
(make-derivation-output path algo hash)
result)))))
@ -170,8 +171,10 @@ (define (write-list lst)
(write-list (map (match-lambda
((name . ($ <derivation-output> path hash-algo hash))
(format #f "(~s,~s,~s,~s)"
name path (or hash-algo "")
(or hash ""))))
name path
(or (and=> hash-algo symbol->string) "")
(or (and=> hash bytevector->base16-string)
""))))
outputs))
(display "," port)
(write-list (map (match-lambda
@ -222,12 +225,13 @@ (define derivation-hash ; `hashDerivationModulo' in derivations.cc
"Return the hash of DRV, modulo its fixed-output inputs, as a bytevector."
(match drv
(($ <derivation> ((_ . ($ <derivation-output> path
(? symbol? hash-algo) (? string? hash)))))
(? symbol? hash-algo) (? bytevector? hash)))))
;; A fixed-output derivation.
(sha256
(string->utf8
(string-append "fixed:out:" (symbol->string hash-algo)
":" hash ":" path))))
":" (bytevector->base16-string hash)
":" path))))
(($ <derivation> outputs inputs sources
system builder args env-vars)
;; A regular derivation: replace the path of each input with that

15
tests/derivations.scm
View file

@ -25,6 +25,7 @@ (define-module (test-derivations)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-64)
#:use-module (rnrs io ports)
#:use-module (rnrs bytevectors)
#:use-module (ice-9 rdelim))
(define %store
@ -68,6 +69,20 @@ (define %store
(string=? (call-with-input-file path read-line)
"hello, world")))))
(test-assert "fixed-output derivation"
(let* ((builder (add-text-to-store %store "my-fixed-builder.sh"
"echo -n hello > $out" '()))
(hash (sha256 (string->utf8 "hello")))
(drv-path (derivation %store "fixed" "x86_64-linux"
"/bin/sh" `(,builder)
'() `((,builder))
#:hash hash #:hash-algo 'sha256))
(succeeded? (build-derivations %store (list drv-path))))
(and succeeded?
(let ((p (derivation-path->output-path drv-path)))
(equal? (string->utf8 "hello")
(call-with-input-file p get-bytevector-all))))))
(define %coreutils
(false-if-exception (nixpkgs-derivation "coreutils")))