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derivations: Add support for recursive fixed-output derivations. 

* guix/derivations.scm (<derivation-output>): Add 'recursive?' field.
  Adjust 'make-derivation-output' callers.
  (%read-derivation) <fixed-output>: When HASH-ALGO starts with 'r:',
  set the 'recursive?' field and drop 'r:' from the hash algo name.
  (write-derivation)[write-output]: Write the algo as 'r:HASH-ALGO' when
  the RECURSIVE? field is set.
  (derivation-hash) <fixed-output>: Prepend "r:" when RECURSIVE? is set.
  (fixed-output-path): New procedure.
  (derivation): Add #:recursive? parameter.  Use 'fixed-output-path' to
  compute the output file name of a fixed output derivation.
  (build-expression->derivation): Add #:recursive? parameter.  Pass it
  to 'derivation'.
* tests/derivations.scm ("fixed-output derivation, recursive",
  "build-expression->derivation produces recursive fixed-output",
  "build-expression->derivation uses recursive fixed-output"): New
  tests.
* doc/guix.texi (Derivations): Document #:recursive? for 'derivation'.
  Add #:recursive? for 'build-expression->derivation'.
This commit is contained in:
Ludovic Courtès 2014-02-21 23:03:19 +01:00
parent 3140f2df42
commit 36bbbbd150
3 changed files with 127 additions and 23 deletions
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9
doc/guix.texi
View File

@ -1478,7 +1478,7 @@ a derivation is the @code{derivation} procedure:
@deffn {Scheme Procedure} derivation @var{store} @var{name} @var{builder} @
@var{args} [#:outputs '("out")] [#:hash #f] [#:hash-algo #f] @
[#:hash-mode #f] [#:inputs '()] [#:env-vars '()] @
[#:recursive? #f] [#:hash-mode #f] [#:inputs '()] [#:env-vars '()] @
[#:system (%current-system)] [#:references-graphs #f] @
[#:local-build? #f]
Build a derivation with the given arguments, and return the resulting
@ -1486,7 +1486,10 @@ Build a derivation with the given arguments, and return the resulting
When @var{hash}, @var{hash-algo}, and @var{hash-mode} are given, a
@dfn{fixed-output derivation} is created---i.e., one whose result is
known in advance, such as a file download.
known in advance, such as a file download. If, in addition,
@var{recursive?} is true, then that fixed output may be an executable
file or a directory and @var{hash} must be the hash of an archive
containing this output.
When @var{references-graphs} is true, it must be a list of file
name/store path pairs. In that case, the reference graph of each store
@ -1526,7 +1529,7 @@ the caller to directly pass a Guile expression as the build script:
@var{name} @var{exp} @
[#:system (%current-system)] [#:inputs '()] @
[#:outputs '("out")] [#:hash #f] [#:hash-algo #f] @
[#:env-vars '()] [#:modules '()] @
[#:recursive? #f] [#:env-vars '()] [#:modules '()] @
[#:references-graphs #f] [#:local-build? #f] [#:guile-for-build #f]
Return a derivation that executes Scheme expression @var{exp} as a
builder for derivation @var{name}. @var{inputs} must be a list of

69
guix/derivations.scm
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@ -47,6 +47,7 @@
derivation-output-path
derivation-output-hash-algo
derivation-output-hash
derivation-output-recursive?
<derivation-input>
derivation-input?
@ -91,11 +92,12 @@
(file-name derivation-file-name)) ; the .drv file name
(define-record-type <derivation-output>
(make-derivation-output path hash-algo hash)
(make-derivation-output path hash-algo hash recursive?)
derivation-output?
(path derivation-output-path) ; store path
(hash-algo derivation-output-hash-algo) ; symbol | #f
(hash derivation-output-hash)) ; bytevector | #f
(hash derivation-output-hash) ; bytevector | #f
(recursive? derivation-output-recursive?)) ; Boolean
(define-record-type <derivation-input>
(make-derivation-input path sub-derivations)
@ -241,14 +243,19 @@ that second value is the empty list."
(match output
((name path "" "")
(alist-cons name
(make-derivation-output path #f #f)
(make-derivation-output path #f #f #f)
result))
((name path hash-algo hash)
;; fixed-output
(let ((algo (string->symbol hash-algo))
(let* ((rec? (string-prefix? "r:" hash-algo))
(algo (string->symbol
(if rec?
(string-drop hash-algo 2)
hash-algo)))
(hash (base16-string->bytevector hash)))
(alist-cons name
(make-derivation-output path algo hash)
(make-derivation-output path algo
hash rec?)
result)))))
'()
x))
@ -368,9 +375,12 @@ that form."
(define (write-output output port)
(match output
((name . ($ <derivation-output> path hash-algo hash))
((name . ($ <derivation-output> path hash-algo hash recursive?))
(write-tuple (list name path
(or (and=> hash-algo symbol->string) "")
(if hash-algo
(string-append (if recursive? "r:" "")
(symbol->string hash-algo))
"")
(or (and=> hash bytevector->base16-string)
""))
write
@ -476,11 +486,14 @@ in SIZE bytes."
"Return the hash of DRV, modulo its fixed-output inputs, as a bytevector."
(match drv
(($ <derivation> ((_ . ($ <derivation-output> path
(? symbol? hash-algo) (? bytevector? hash)))))
(? symbol? hash-algo) (? bytevector? hash)
(? boolean? recursive?)))))
;; A fixed-output derivation.
(sha256
(string->utf8
(string-append "fixed:out:" (symbol->string hash-algo)
(string-append "fixed:out:"
(if recursive? "r:" "")
(symbol->string hash-algo)
":" (bytevector->base16-string hash)
":" path))))
(($ <derivation> outputs inputs sources
@ -527,17 +540,33 @@ the derivation called NAME with hash HASH."
name
(string-append name "-" output))))
(define (fixed-output-path output hash-algo hash recursive? name)
"Return an output path for the fixed output OUTPUT defined by HASH of type
HASH-ALGO, of the derivation NAME. RECURSIVE? has the same meaning as for
'add-to-store'."
(if (and recursive? (eq? hash-algo 'sha256))
(store-path "source" hash name)
(let ((tag (string-append "fixed:" output ":"
(if recursive? "r:" "")
(symbol->string hash-algo) ":"
(bytevector->base16-string hash) ":")))
(store-path (string-append "output:" output)
(sha256 (string->utf8 tag))
name))))
(define* (derivation store name builder args
#:key
(system (%current-system)) (env-vars '())
(inputs '()) (outputs '("out"))
hash hash-algo hash-mode
hash hash-algo hash-mode recursive?
references-graphs
local-build?)
"Build a derivation with the given arguments, and return the resulting
<derivation> object. When HASH, HASH-ALGO, and HASH-MODE are given, a
fixed-output derivation is created---i.e., one whose result is known in
advance, such as a file download.
advance, such as a file download. If, in addition, RECURSIVE? is true, then
that fixed output may be an executable file or a directory and HASH must be
the hash of an archive containing this output.
When REFERENCES-GRAPHS is true, it must be a list of file name/store path
pairs. In that case, the reference graph of each store path is exported in
@ -555,12 +584,16 @@ derivations where the costs of data transfers would outweigh the benefits."
(let* ((drv-hash (derivation-hash drv))
(outputs (map (match-lambda
((output-name . ($ <derivation-output>
_ algo hash))
(let ((path (output-path output-name
drv-hash name)))
_ algo hash rec?))
(let ((path (if hash
(fixed-output-path output-name
algo hash
rec? name)
(output-path output-name
drv-hash name))))
(cons output-name
(make-derivation-output path algo
hash)))))
hash rec?)))))
outputs)))
(make-derivation outputs inputs sources system builder args
(map (match-lambda
@ -618,7 +651,8 @@ derivations where the costs of data transfers would outweigh the benefits."
(let* ((outputs (map (lambda (name)
;; Return outputs with an empty path.
(cons name
(make-derivation-output "" hash-algo hash)))
(make-derivation-output "" hash-algo
hash recursive?)))
outputs))
(inputs (map (match-lambda
(((? derivation? drv))
@ -909,7 +943,7 @@ they can refer to each other."
(system (%current-system))
(inputs '())
(outputs '("out"))
hash hash-algo
hash hash-algo recursive?
(env-vars '())
(modules '())
guile-for-build
@ -1056,6 +1090,7 @@ LOCAL-BUILD?."
env-vars)
#:hash hash #:hash-algo hash-algo
#:recursive? recursive?
#:outputs outputs
#:references-graphs references-graphs
#:local-build? local-build?)))

70
tests/derivations.scm
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@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -23,7 +23,8 @@
#:use-module (guix utils)
#:use-module (guix hash)
#:use-module (guix base32)
#:use-module ((guix packages) #:select (package-derivation))
#:use-module ((guix packages) #:select (package-derivation base32))
#:use-module ((guix build utils) #:select (executable-file?))
#:use-module ((gnu packages) #:select (search-bootstrap-binary))
#:use-module (gnu packages bootstrap)
#:use-module ((gnu packages guile) #:select (guile-1.8))
@ -190,6 +191,23 @@
(equal? (derivation->output-path drv1)
(derivation->output-path drv2)))))
(test-assert "fixed-output derivation, recursive"
(let* ((builder (add-text-to-store %store "my-fixed-builder.sh"
"echo -n hello > $out" '()))
(hash (sha256 (string->utf8 "hello")))
(drv (derivation %store "fixed-rec"
%bash `(,builder)
#:inputs `((,builder))
#:hash (base32 "0sg9f58l1jj88w6pdrfdpj5x9b1zrwszk84j81zvby36q9whhhqa")
#:hash-algo 'sha256
#:recursive? #t))
(succeeded? (build-derivations %store (list drv))))
(and succeeded?
(let ((p (derivation->output-path drv)))
(and (equal? (string->utf8 "hello")
(call-with-input-file p get-bytevector-all))
(bytevector? (query-path-hash %store p)))))))
(test-assert "derivation with a fixed-output input"
;; A derivation D using a fixed-output derivation F doesn't has the same
;; output path when passed F or F', as long as F and F' have the same output
@ -637,6 +655,54 @@ Deriver: ~a~%"
(derivation-file-name final1)))
(build-derivations %store (list final1 final2)))))
(test-assert "build-expression->derivation produces recursive fixed-output"
(let* ((builder '(begin
(use-modules (srfi srfi-26))
(mkdir %output)
(chdir %output)
(call-with-output-file "exe"
(cut display "executable" <>))
(chmod "exe" #o777)
(symlink "exe" "symlink")
(mkdir "subdir")))
(drv (build-expression->derivation %store "fixed-rec" builder
#:hash-algo 'sha256
#:hash (base32
"10k1lw41wyrjf9mxydi0is5nkpynlsvgslinics4ppir13g7d74p")
#:recursive? #t)))
(and (build-derivations %store (list drv))
(let* ((dir (derivation->output-path drv))
(exe (string-append dir "/exe"))
(link (string-append dir "/symlink"))
(subdir (string-append dir "/subdir")))
(and (executable-file? exe)
(string=? "executable"
(call-with-input-file exe get-string-all))
(string=? "exe" (readlink link))
(file-is-directory? subdir))))))
(test-assert "build-expression->derivation uses recursive fixed-output"
(let* ((builder '(call-with-output-file %output
(lambda (port)
(display "hello" port))))
(fixed (build-expression->derivation %store "small-fixed-rec"
builder
#:hash-algo 'sha256
#:hash (base32
"0sg9f58l1jj88w6pdrfdpj5x9b1zrwszk84j81zvby36q9whhhqa")
#:recursive? #t))
(in (derivation->output-path fixed))
(builder `(begin
(mkdir %output)
(chdir %output)
(symlink ,in "symlink")))
(drv (build-expression->derivation %store "fixed-rec-user"
builder
#:inputs `(("fixed" ,fixed)))))
(and (build-derivations %store (list drv))
(let ((out (derivation->output-path drv)))
(string=? (readlink (string-append out "/symlink")) in)))))
(test-assert "build-expression->derivation with #:references-graphs"
(let* ((input (add-text-to-store %store "foo" "hello"
(list %bash %mkdir)))