Add builder-side utilities for phases, stream editing, & co.
* guix/build/utils.scm (with-directory-excursion): New macro. (alist-cons-before, alist-cons-after, alist-replace): New procedures. (substitute): New procedure. * tests/build-utils.scm: New file. * Makefile.am (TESTS): Add `tests/build-utils.scm'.
This commit is contained in:
Ludovic Courtès
parent
c9d01150c0
commit
b0e0d0e99f
|
|
@ -42,6 +42,7 @@ TESTS = \
|
|||
tests/builders.scm \
|
||||
tests/derivations.scm \
|
||||
tests/utils.scm \
|
||||
tests/build-utils.scm \
|
||||
tests/packages.scm
|
||||
|
||||
TESTS_ENVIRONMENT = \
|
||||
|
|
|
|||
|
|
@ -18,8 +18,22 @@
|
|||
|
||||
(define-module (guix build utils)
|
||||
#:use-module (srfi srfi-1)
|
||||
#:use-module (srfi srfi-11)
|
||||
#:use-module (ice-9 match)
|
||||
#:use-module (ice-9 regex)
|
||||
#:use-module (ice-9 rdelim)
|
||||
#:export (directory-exists?
|
||||
set-path-environment-variable))
|
||||
with-directory-excursion
|
||||
set-path-environment-variable
|
||||
alist-cons-before
|
||||
alist-cons-after
|
||||
alist-replace
|
||||
substitute))
|
||||
|
||||
|
||||
;;;
|
||||
;;; Directories.
|
||||
;;;
|
||||
|
||||
(define (directory-exists? dir)
|
||||
"Return #t if DIR exists and is a directory."
|
||||
|
|
@ -27,6 +41,22 @@
|
|||
(and s
|
||||
(eq? 'directory (stat:type s)))))
|
||||
|
||||
(define-syntax-rule (with-directory-excursion dir body ...)
|
||||
"Run BODY with DIR as the process's current directory."
|
||||
(let ((init (getcwd)))
|
||||
(dynamic-wind
|
||||
(lambda ()
|
||||
(chdir dir))
|
||||
(lambda ()
|
||||
body ...)
|
||||
(lambda ()
|
||||
(chdir init)))))
|
||||
|
||||
|
||||
;;;
|
||||
;;; Search paths.
|
||||
;;;
|
||||
|
||||
(define (search-path-as-list sub-directories input-dirs)
|
||||
"Return the list of directories among SUB-DIRECTORIES that exist in
|
||||
INPUT-DIRS. Example:
|
||||
|
|
@ -62,3 +92,89 @@ SEPARATOR-separated path accordingly. Example:
|
|||
(list->search-path-as-string (search-path-as-list sub-directories
|
||||
input-dirs)
|
||||
separator)))
|
||||
|
||||
|
||||
;;;
|
||||
;;; Phases.
|
||||
;;;
|
||||
;;; In (guix build gnu-build-system), there are separate phases (configure,
|
||||
;;; build, test, install). They are represented as a list of name/procedure
|
||||
;;; pairs. The following procedures make it easy to change the list of
|
||||
;;; phases.
|
||||
;;;
|
||||
|
||||
(define* (alist-cons-before reference key value alist
|
||||
#:optional (key=? equal?))
|
||||
"Insert the KEY/VALUE pair before the first occurrence of a pair whose key
|
||||
is REFERENCE in ALIST. Use KEY=? to compare keys."
|
||||
(let-values (((before after)
|
||||
(break (match-lambda
|
||||
((k . _)
|
||||
(key=? k reference)))
|
||||
alist)))
|
||||
(append before (alist-cons key value after))))
|
||||
|
||||
(define* (alist-cons-after reference key value alist
|
||||
#:optional (key=? equal?))
|
||||
"Insert the KEY/VALUE pair after the first occurrence of a pair whose key
|
||||
is REFERENCE in ALIST. Use KEY=? to compare keys."
|
||||
(let-values (((before after)
|
||||
(break (match-lambda
|
||||
((k . _)
|
||||
(key=? k reference)))
|
||||
alist)))
|
||||
(match after
|
||||
((reference after ...)
|
||||
(append before (cons* reference `(,key . ,value) after)))
|
||||
(()
|
||||
(append before `((,key . ,value)))))))
|
||||
|
||||
(define* (alist-replace key value alist #:optional (key=? equal?))
|
||||
"Replace the first pair in ALIST whose car is KEY with the KEY/VALUE pair.
|
||||
An error is raised when no such pair exists."
|
||||
(let-values (((before after)
|
||||
(break (match-lambda
|
||||
((k . _)
|
||||
(key=? k key)))
|
||||
alist)))
|
||||
(match after
|
||||
((_ after ...)
|
||||
(append before (alist-cons key value after))))))
|
||||
|
||||
|
||||
;;;
|
||||
;;; Text substitution (aka. sed).
|
||||
;;;
|
||||
|
||||
(define (substitute file pattern match-proc)
|
||||
"For each line of FILE that matches PATTERN, a regexp, call (MATCH-PROC
|
||||
MATCH OUTPUT-PORT)."
|
||||
(let* ((regexp (if (regexp? pattern)
|
||||
pattern
|
||||
(make-regexp pattern regexp/extended)))
|
||||
(template (string-append file ".XXXXXX"))
|
||||
(out (mkstemp! template)))
|
||||
(with-throw-handler #t
|
||||
(lambda ()
|
||||
(call-with-input-file file
|
||||
(lambda (in)
|
||||
(let loop ((line (read-line in)))
|
||||
(if (eof-object? line)
|
||||
#t
|
||||
(begin
|
||||
(cond ((regexp-exec regexp line)
|
||||
=>
|
||||
(lambda (m)
|
||||
(match-proc m out)))
|
||||
(else
|
||||
(display line out)
|
||||
(newline out)))
|
||||
(loop (read-line in)))))))
|
||||
(rename-file template file))
|
||||
(lambda (key . args)
|
||||
(false-if-exception (delete-file template))))))
|
||||
|
||||
;;; Local Variables:
|
||||
;;; eval: (put 'call-with-output-file/atomic 'scheme-indent-function 1)
|
||||
;;; eval: (put 'with-throw-handler 'scheme-indent-function 1)
|
||||
;;; End:
|
||||
|
|
|
|||
|
|
@ -0,0 +1,58 @@
|
|||
;;; Guix --- Nix package management from Guile. -*- coding: utf-8 -*-
|
||||
;;; Copyright (C) 2012 Ludovic Courtès <ludo@gnu.org>
|
||||
;;;
|
||||
;;; This file is part of Guix.
|
||||
;;;
|
||||
;;; 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.
|
||||
;;;
|
||||
;;; 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 Guix. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
|
||||
(define-module (test-build-utils)
|
||||
#:use-module (guix build utils)
|
||||
#:use-module (srfi srfi-64))
|
||||
|
||||
(test-begin "build-utils")
|
||||
|
||||
(test-equal "alist-cons-before"
|
||||
'((a . 1) (x . 42) (b . 2) (c . 3))
|
||||
(alist-cons-before 'b 'x 42 '((a . 1) (b . 2) (c . 3))))
|
||||
|
||||
(test-equal "alist-cons-before, reference not found"
|
||||
'((a . 1) (b . 2) (c . 3) (x . 42))
|
||||
(alist-cons-before 'z 'x 42 '((a . 1) (b . 2) (c . 3))))
|
||||
|
||||
(test-equal "alist-cons-after"
|
||||
'((a . 1) (b . 2) (x . 42) (c . 3))
|
||||
(alist-cons-after 'b 'x 42 '((a . 1) (b . 2) (c . 3))))
|
||||
|
||||
(test-equal "alist-cons-after, reference not found"
|
||||
'((a . 1) (b . 2) (c . 3) (x . 42))
|
||||
(alist-cons-after 'z 'x 42 '((a . 1) (b . 2) (c . 3))))
|
||||
|
||||
(test-equal "alist-replace"
|
||||
'((a . 1) (b . 77) (c . 3))
|
||||
(alist-replace 'b 77 '((a . 1) (b . 2) (c . 3))))
|
||||
|
||||
(test-assert "alist-replace, key not found"
|
||||
(not (false-if-exception
|
||||
(alist-replace 'z 77 '((a . 1) (b . 2) (c . 3))))))
|
||||
|
||||
(test-end)
|
||||
|
||||
|
||||
(exit (= (test-runner-fail-count (test-runner-current)) 0))
|
||||
|
||||
;;; Local Variables:
|
||||
;;; eval: (put 'test-assert 'scheme-indent-function 1)
|
||||
;;; eval: (put 'test-equal 'scheme-indent-function 1)
|
||||
;;; End:
|
||||
Loading…
Reference in New Issue