9c1edabd8b
* guix/packages.scm (package-transitive-target-inputs,
package-transitive-native-inputs): New procedures.
(package-derivation): Parametrize `%current-target-system'.
(package-cross-derivation): Implement.
* guix/utils.scm (%current-target-system): New variable.
* tests/packages.scm ("package-cross-derivation"): New test.
* doc/guix.texi (Defining Packages): Document
`package-cross-derivation'.
461 lines
15 KiB
Scheme
461 lines
15 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
||
;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
|
||
;;;
|
||
;;; This file is part of GNU Guix.
|
||
;;;
|
||
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
||
;;; under the terms of the GNU General Public License as published by
|
||
;;; the Free Software Foundation; either version 3 of the License, or (at
|
||
;;; your option) any later version.
|
||
;;;
|
||
;;; GNU Guix is distributed in the hope that it will be useful, but
|
||
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;;; GNU General Public License for more details.
|
||
;;;
|
||
;;; You should have received a copy of the GNU General Public License
|
||
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
(define-module (guix utils)
|
||
#:use-module (guix config)
|
||
#:use-module (srfi srfi-1)
|
||
#:use-module (srfi srfi-9)
|
||
#:use-module (srfi srfi-26)
|
||
#:use-module (srfi srfi-39)
|
||
#:use-module (srfi srfi-60)
|
||
#:use-module (rnrs bytevectors)
|
||
#:use-module ((rnrs io ports) #:select (put-bytevector))
|
||
#:use-module ((guix build utils) #:select (dump-port))
|
||
#:use-module (ice-9 vlist)
|
||
#:use-module (ice-9 format)
|
||
#:autoload (ice-9 popen) (open-pipe*)
|
||
#:autoload (ice-9 rdelim) (read-line)
|
||
#:use-module (ice-9 regex)
|
||
#:use-module (ice-9 match)
|
||
#:use-module (ice-9 format)
|
||
#:autoload (system foreign) (pointer->procedure)
|
||
#:export (bytevector->base16-string
|
||
base16-string->bytevector
|
||
sha256
|
||
|
||
%nixpkgs-directory
|
||
nixpkgs-derivation
|
||
nixpkgs-derivation*
|
||
|
||
compile-time-value
|
||
memoize
|
||
default-keyword-arguments
|
||
substitute-keyword-arguments
|
||
|
||
<location>
|
||
location
|
||
location?
|
||
location-file
|
||
location-line
|
||
location-column
|
||
source-properties->location
|
||
|
||
gnu-triplet->nix-system
|
||
%current-system
|
||
%current-target-system
|
||
version-compare
|
||
version>?
|
||
package-name->name+version
|
||
string-tokenize*
|
||
file-extension
|
||
call-with-temporary-output-file
|
||
fold2
|
||
filtered-port))
|
||
|
||
|
||
;;;
|
||
;;; Compile-time computations.
|
||
;;;
|
||
|
||
(define-syntax compile-time-value
|
||
(syntax-rules ()
|
||
"Evaluate the given expression at compile time. The expression must
|
||
evaluate to a simple datum."
|
||
((_ exp)
|
||
(let-syntax ((v (lambda (s)
|
||
(let ((val exp))
|
||
(syntax-case s ()
|
||
(_ #`'#,(datum->syntax s val)))))))
|
||
v))))
|
||
|
||
|
||
;;;
|
||
;;; Base 16.
|
||
;;;
|
||
|
||
(define (bytevector->base16-string bv)
|
||
"Return the hexadecimal representation of BV's contents."
|
||
(define len
|
||
(bytevector-length bv))
|
||
|
||
(let-syntax ((base16-chars (lambda (s)
|
||
(syntax-case s ()
|
||
(_
|
||
(let ((v (list->vector
|
||
(unfold (cut > <> 255)
|
||
(lambda (n)
|
||
(format #f "~2,'0x" n))
|
||
1+
|
||
0))))
|
||
v))))))
|
||
(define chars base16-chars)
|
||
(let loop ((i 0)
|
||
(r '()))
|
||
(if (= i len)
|
||
(string-concatenate-reverse r)
|
||
(loop (+ 1 i)
|
||
(cons (vector-ref chars (bytevector-u8-ref bv i)) r))))))
|
||
|
||
(define base16-string->bytevector
|
||
(let ((chars->value (fold (lambda (i r)
|
||
(vhash-consv (string-ref (number->string i 16)
|
||
0)
|
||
i r))
|
||
vlist-null
|
||
(iota 16))))
|
||
(lambda (s)
|
||
"Return the bytevector whose hexadecimal representation is string S."
|
||
(define bv
|
||
(make-bytevector (quotient (string-length s) 2) 0))
|
||
|
||
(string-fold (lambda (chr i)
|
||
(let ((j (quotient i 2))
|
||
(v (and=> (vhash-assv chr chars->value) cdr)))
|
||
(if v
|
||
(if (zero? (logand i 1))
|
||
(bytevector-u8-set! bv j
|
||
(arithmetic-shift v 4))
|
||
(let ((w (bytevector-u8-ref bv j)))
|
||
(bytevector-u8-set! bv j (logior v w))))
|
||
(error "invalid hexadecimal character" chr)))
|
||
(+ i 1))
|
||
0
|
||
s)
|
||
bv)))
|
||
|
||
|
||
;;;
|
||
;;; Hash.
|
||
;;;
|
||
|
||
(define sha256
|
||
(let ((hash (pointer->procedure void
|
||
(dynamic-func "gcry_md_hash_buffer"
|
||
(dynamic-link %libgcrypt))
|
||
`(,int * * ,size_t)))
|
||
(sha256 8)) ; GCRY_MD_SHA256, as of 1.5.0
|
||
(lambda (bv)
|
||
"Return the SHA256 of BV as a bytevector."
|
||
(let ((digest (make-bytevector (/ 256 8))))
|
||
(hash sha256 (bytevector->pointer digest)
|
||
(bytevector->pointer bv) (bytevector-length bv))
|
||
digest))))
|
||
|
||
|
||
;;;
|
||
;;; Filtering & pipes.
|
||
;;;
|
||
|
||
(define (filtered-port command input)
|
||
"Return an input port where data drained from INPUT is filtered through
|
||
COMMAND (a list). In addition, return a list of PIDs that the caller must
|
||
wait. When INPUT is a file port, it must be unbuffered; otherwise, any
|
||
buffered data is lost."
|
||
(let loop ((input input)
|
||
(pids '()))
|
||
(if (file-port? input)
|
||
(match (pipe)
|
||
((in . out)
|
||
(match (primitive-fork)
|
||
(0
|
||
(close-port in)
|
||
(close-port (current-input-port))
|
||
(dup2 (fileno input) 0)
|
||
(close-port (current-output-port))
|
||
(dup2 (fileno out) 1)
|
||
(apply execl (car command) command))
|
||
(child
|
||
(close-port out)
|
||
(values in (cons child pids))))))
|
||
|
||
;; INPUT is not a file port, so fork just for the sake of tunneling it
|
||
;; through a file port.
|
||
(match (pipe)
|
||
((in . out)
|
||
(match (primitive-fork)
|
||
(0
|
||
(dynamic-wind
|
||
(const #t)
|
||
(lambda ()
|
||
(close-port in)
|
||
(dump-port input out))
|
||
(lambda ()
|
||
(false-if-exception (close out))
|
||
(primitive-exit 0))))
|
||
(child
|
||
(close-port out)
|
||
(loop in (cons child pids)))))))))
|
||
|
||
|
||
;;;
|
||
;;; Nixpkgs.
|
||
;;;
|
||
|
||
(define %nixpkgs-directory
|
||
(make-parameter
|
||
;; Capture the build-time value of $NIXPKGS.
|
||
(or %nixpkgs
|
||
(and=> (getenv "NIXPKGS")
|
||
(lambda (val)
|
||
;; Bail out when passed an empty string, otherwise
|
||
;; `nix-instantiate' will sit there and attempt to read
|
||
;; from its standard input.
|
||
(if (string=? val "")
|
||
#f
|
||
val))))))
|
||
|
||
(define* (nixpkgs-derivation attribute #:optional (system (%current-system)))
|
||
"Return the derivation path of ATTRIBUTE in Nixpkgs."
|
||
(let* ((p (open-pipe* OPEN_READ (or (getenv "NIX_INSTANTIATE")
|
||
%nix-instantiate)
|
||
"-A" attribute (%nixpkgs-directory)
|
||
"--argstr" "system" system))
|
||
(l (read-line p))
|
||
(s (close-pipe p)))
|
||
(and (zero? (status:exit-val s))
|
||
(not (eof-object? l))
|
||
l)))
|
||
|
||
(define-syntax-rule (nixpkgs-derivation* attribute)
|
||
"Evaluate the given Nixpkgs derivation at compile-time."
|
||
(compile-time-value (nixpkgs-derivation attribute)))
|
||
|
||
|
||
;;;
|
||
;;; Miscellaneous.
|
||
;;;
|
||
|
||
(define (memoize proc)
|
||
"Return a memoizing version of PROC."
|
||
(let ((cache (make-hash-table)))
|
||
(lambda args
|
||
(let ((results (hash-ref cache args)))
|
||
(if results
|
||
(apply values results)
|
||
(let ((results (call-with-values (lambda ()
|
||
(apply proc args))
|
||
list)))
|
||
(hash-set! cache args results)
|
||
(apply values results)))))))
|
||
|
||
(define (default-keyword-arguments args defaults)
|
||
"Return ARGS augmented with any keyword/value from DEFAULTS for
|
||
keywords not already present in ARGS."
|
||
(let loop ((defaults defaults)
|
||
(args args))
|
||
(match defaults
|
||
((kw value rest ...)
|
||
(loop rest
|
||
(if (assoc-ref kw args)
|
||
args
|
||
(cons* kw value args))))
|
||
(()
|
||
args))))
|
||
|
||
(define-syntax substitute-keyword-arguments
|
||
(syntax-rules ()
|
||
"Return a new list of arguments where the value for keyword arg KW is
|
||
replaced by EXP. EXP is evaluated in a context where VAR is boud to the
|
||
previous value of the keyword argument."
|
||
((_ original-args ((kw var) exp) ...)
|
||
(let loop ((args original-args)
|
||
(before '()))
|
||
(match args
|
||
((kw var rest (... ...))
|
||
(loop rest (cons* exp kw before)))
|
||
...
|
||
((x rest (... ...))
|
||
(loop rest (cons x before)))
|
||
(()
|
||
(reverse before)))))))
|
||
|
||
(define (gnu-triplet->nix-system triplet)
|
||
"Return the Nix system type corresponding to TRIPLET, a GNU triplet as
|
||
returned by `config.guess'."
|
||
(let ((triplet (cond ((string-match "^i[345]86-(.*)$" triplet)
|
||
=>
|
||
(lambda (m)
|
||
(string-append "i686-" (match:substring m 1))))
|
||
(else triplet))))
|
||
(cond ((string-match "^([^-]+)-([^-]+-)?linux-gnu.*" triplet)
|
||
=>
|
||
(lambda (m)
|
||
;; Nix omits `-gnu' for GNU/Linux.
|
||
(string-append (match:substring m 1) "-linux")))
|
||
((string-match "^([^-]+)-([^-]+-)?([[:alpha:]]+)([0-9]+\\.?)*$" triplet)
|
||
=>
|
||
(lambda (m)
|
||
;; Nix strip the version number from names such as `gnu0.3',
|
||
;; `darwin10.2.0', etc., and always strips the vendor part.
|
||
(string-append (match:substring m 1) "-"
|
||
(match:substring m 3))))
|
||
(else triplet))))
|
||
|
||
(define %current-system
|
||
;; System type as expected by Nix, usually ARCHITECTURE-KERNEL.
|
||
;; By default, this is equal to (gnu-triplet->nix-system %host-type).
|
||
(make-parameter %system))
|
||
|
||
(define %current-target-system
|
||
;; Either #f or a GNU triplet representing the target system we are
|
||
;; cross-building to.
|
||
(make-parameter #f))
|
||
|
||
(define version-compare
|
||
(let ((strverscmp
|
||
(let ((sym (or (dynamic-func "strverscmp" (dynamic-link))
|
||
(error "could not find `strverscmp' (from GNU libc)"))))
|
||
(pointer->procedure int sym (list '* '*)))))
|
||
(lambda (a b)
|
||
"Return '> when A denotes a newer version than B,
|
||
'< when A denotes a older version than B,
|
||
or '= when they denote equal versions."
|
||
(let ((result (strverscmp (string->pointer a) (string->pointer b))))
|
||
(cond ((positive? result) '>)
|
||
((negative? result) '<)
|
||
(else '=))))))
|
||
|
||
(define (version>? a b)
|
||
"Return #t when A denotes a newer version than B."
|
||
(eq? '> (version-compare a b)))
|
||
|
||
(define (package-name->name+version name)
|
||
"Given NAME, a package name like \"foo-0.9.1b\", return two values:
|
||
\"foo\" and \"0.9.1b\". When the version part is unavailable, NAME and
|
||
#f are returned. The first hyphen followed by a digit is considered to
|
||
introduce the version part."
|
||
;; See also `DrvName' in Nix.
|
||
|
||
(define number?
|
||
(cut char-set-contains? char-set:digit <>))
|
||
|
||
(let loop ((chars (string->list name))
|
||
(prefix '()))
|
||
(match chars
|
||
(()
|
||
(values name #f))
|
||
((#\- (? number? n) rest ...)
|
||
(values (list->string (reverse prefix))
|
||
(list->string (cons n rest))))
|
||
((head tail ...)
|
||
(loop tail (cons head prefix))))))
|
||
|
||
(define (file-extension file)
|
||
"Return the extension of FILE or #f if there is none."
|
||
(let ((dot (string-rindex file #\.)))
|
||
(and dot (substring file (+ 1 dot) (string-length file)))))
|
||
|
||
(define (string-tokenize* string separator)
|
||
"Return the list of substrings of STRING separated by SEPARATOR. This is
|
||
like `string-tokenize', but SEPARATOR is a string."
|
||
(define (index string what)
|
||
(let loop ((string string)
|
||
(offset 0))
|
||
(cond ((string-null? string)
|
||
#f)
|
||
((string-prefix? what string)
|
||
offset)
|
||
(else
|
||
(loop (string-drop string 1) (+ 1 offset))))))
|
||
|
||
(define len
|
||
(string-length separator))
|
||
|
||
(let loop ((string string)
|
||
(result '()))
|
||
(cond ((index string separator)
|
||
=>
|
||
(lambda (offset)
|
||
(loop (string-drop string (+ offset len))
|
||
(cons (substring string 0 offset)
|
||
result))))
|
||
(else
|
||
(reverse (cons string result))))))
|
||
|
||
(define (call-with-temporary-output-file proc)
|
||
"Call PROC with a name of a temporary file and open output port to that
|
||
file; close the file and delete it when leaving the dynamic extent of this
|
||
call."
|
||
(let* ((template (string-copy "guix-file.XXXXXX"))
|
||
(out (mkstemp! template)))
|
||
(dynamic-wind
|
||
(lambda ()
|
||
#t)
|
||
(lambda ()
|
||
(proc template out))
|
||
(lambda ()
|
||
(false-if-exception (close out))
|
||
(false-if-exception (delete-file template))))))
|
||
|
||
(define fold2
|
||
(case-lambda
|
||
((proc seed1 seed2 lst)
|
||
"Like `fold', but with a single list and two seeds."
|
||
(let loop ((result1 seed1)
|
||
(result2 seed2)
|
||
(lst lst))
|
||
(if (null? lst)
|
||
(values result1 result2)
|
||
(call-with-values
|
||
(lambda () (proc (car lst) result1 result2))
|
||
(lambda (result1 result2)
|
||
(loop result1 result2 (cdr lst)))))))
|
||
((proc seed1 seed2 lst1 lst2)
|
||
"Like `fold', but with a two lists and two seeds."
|
||
(let loop ((result1 seed1)
|
||
(result2 seed2)
|
||
(lst1 lst1)
|
||
(lst2 lst2))
|
||
(if (or (null? lst1) (null? lst2))
|
||
(values result1 result2)
|
||
(call-with-values
|
||
(lambda () (proc (car lst1) (car lst2) result1 result2))
|
||
(lambda (result1 result2)
|
||
(fold2 proc result1 result2 (cdr lst1) (cdr lst2)))))))))
|
||
|
||
|
||
;;;
|
||
;;; Source location.
|
||
;;;
|
||
|
||
;; A source location.
|
||
(define-record-type <location>
|
||
(make-location file line column)
|
||
location?
|
||
(file location-file) ; file name
|
||
(line location-line) ; 1-indexed line
|
||
(column location-column)) ; 0-indexed column
|
||
|
||
(define location
|
||
(memoize
|
||
(lambda (file line column)
|
||
"Return the <location> object for the given FILE, LINE, and COLUMN."
|
||
(and line column file
|
||
(make-location file line column)))))
|
||
|
||
(define (source-properties->location loc)
|
||
"Return a location object based on the info in LOC, an alist as returned
|
||
by Guile's `source-properties', `frame-source', `current-source-location',
|
||
etc."
|
||
(let ((file (assq-ref loc 'filename))
|
||
(line (assq-ref loc 'line))
|
||
(col (assq-ref loc 'column)))
|
||
;; In accordance with the GCS, start line and column numbers at 1. Note
|
||
;; that unlike LINE and `port-column', COL is actually 1-indexed here...
|
||
(location file (and line (+ line 1)) col)))
|