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`include' relative paths relative to including file

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* module/ice-9/psyntax.scm (include): Like `load', interpret relative
  paths as being relative to the file that does the `include'.

* doc/ref/api-evaluation.texi: Update docs.
This commit is contained in:
Andy Wingo 2013-01-20 20:26:59 +01:00
parent f0b6d8c71d
commit 84f5a82517
2 changed files with 20 additions and 8 deletions
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3
doc/ref/api-evaluation.texi
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@ -1161,6 +1161,9 @@ parts of programs together at expansion-time instead of at run-time.
Open @var{file-name}, at expansion-time, and read the Scheme forms that
it contains, splicing them into the location of the @code{include},
within a @code{begin}.
If @var{file-name} is a relative path, it is searched for relative to
the path that contains the file that the @code{include} for appears in.
@end deffn
If you are a C programmer, if @code{load} in Scheme is like

25
module/ice-9/psyntax.scm
View file

@ -1,7 +1,7 @@
;;;; -*-scheme-*-
;;;;
;;;; Copyright (C) 2001, 2003, 2006, 2009, 2010, 2011,
;;;; 2012 Free Software Foundation, Inc.
;;;; 2012, 2013 Free Software Foundation, Inc.
;;;;
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
@ -2935,9 +2935,15 @@
(define-syntax include
(lambda (x)
(define (absolute-path? path)
(string-prefix? "/" path))
(define read-file
(lambda (fn k)
(let ((p (open-input-file fn)))
(lambda (fn dir k)
(let ((p (open-input-file
(if (absolute-path? fn)
fn
(in-vicinity dir fn)))))
(let f ((x (read p))
(result '()))
(if (eof-object? x)
@ -2946,11 +2952,14 @@
(reverse result))
(f (read p)
(cons (datum->syntax k x) result)))))))
(syntax-case x ()
((k filename)
(let ((fn (syntax->datum #'filename)))
(with-syntax (((exp ...) (read-file fn #'filename)))
#'(begin exp ...)))))))
(let* ((src (syntax-source x))
(file (and src (assq-ref src 'filename)))
(dir (and (string? file) (dirname file))))
(syntax-case x ()
((k filename)
(let ((fn (syntax->datum #'filename)))
(with-syntax (((exp ...) (read-file fn dir #'filename)))
#'(begin exp ...))))))))
(define-syntax include-from-path
(lambda (x)