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utils: Introduce `substitute*', for easier sed-like syntax.
* guix/build/utils.scm (let-matches, substitute*): New macros. * distro/base.scm (guile-1.8): Use `substitute*' instead of `substitute'. Remove the #:modules argument.
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2 changed files with 46 additions and 12 deletions
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@ -120,10 +120,7 @@ (define-public guile-1.8
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(base32
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(base32
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"0l200a0v7h8bh0cwz6v7hc13ds39cgqsmfrks55b1rbj5vniyiy3"))))
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"0l200a0v7h8bh0cwz6v7hc13ds39cgqsmfrks55b1rbj5vniyiy3"))))
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(build-system gnu-build-system)
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(build-system gnu-build-system)
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(arguments '(#:modules ((guix build gnu-build-system)
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(arguments '(#:configure-flags '("--disable-error-on-warning")
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(guix build utils)
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(ice-9 regex))
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#:configure-flags '("--disable-error-on-warning")
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#:patches (list (assoc-ref %build-inputs "patch/snarf"))
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#:patches (list (assoc-ref %build-inputs "patch/snarf"))
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;; Insert a phase before `configure' to patch things up.
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;; Insert a phase before `configure' to patch things up.
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@ -134,13 +131,12 @@ (define-public guile-1.8
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;; Add a call to `lt_dladdsearchdir' so that
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;; Add a call to `lt_dladdsearchdir' so that
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;; `libguile-readline.so' & co. are in the
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;; `libguile-readline.so' & co. are in the
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;; loader's search path.
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;; loader's search path.
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(substitute "libguile/dynl.c"
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(substitute* "libguile/dynl.c"
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"lt_dlinit.*$"
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("lt_dlinit.*$" match)
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(lambda (m p)
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(format #f
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(format p
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" ~a~% lt_dladdsearchdir(\"~a/lib\");~%"
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" ~a~% //lt_dladdsearchdir(\"~a/lib\");~%"
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match
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(match:substring m 0)
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(assoc-ref outputs "out"))))
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(assoc-ref outputs "out")))))
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%standard-phases)))
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%standard-phases)))
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(inputs `(("patch/snarf"
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(inputs `(("patch/snarf"
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,(search-path %load-path "distro/guile-1.8-cpp-4.5.patch"))
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,(search-path %load-path "distro/guile-1.8-cpp-4.5.patch"))
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@ -28,7 +28,8 @@ (define-module (guix build utils)
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alist-cons-before
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alist-cons-before
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alist-cons-after
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alist-cons-after
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alist-replace
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alist-replace
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substitute))
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substitute
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substitute*))
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;;;
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;;;
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@ -175,6 +176,43 @@ (define (substitute file pattern match-proc)
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(lambda (key . args)
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(lambda (key . args)
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(false-if-exception (delete-file template))))))
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(false-if-exception (delete-file template))))))
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(define-syntax let-matches
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;; Helper macro for `substitute*'.
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(syntax-rules (_)
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((let-matches index match (_ vars ...) body ...)
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(let-matches (+ 1 index) match (vars ...)
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body ...))
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((let-matches index match (var vars ...) body ...)
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(let ((var (match:substring match index)))
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(let-matches (+ 1 index) match (vars ...)
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body ...)))
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((let-matches index match () body ...)
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(begin body ...))))
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(define-syntax-rule (substitute* file (regexp whole-match match ...)
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body ...)
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"Substitute REGEXP in FILE by the string returned by BODY. BODY is
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evaluated with each MATCH-VAR bound to the corresponding positional regexp
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sub-expression. For example:
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(substitute* file (\"foo([a-z]+)bar(.*)$\" all letters end)
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(string-append \"baz\" letters end))
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Here, anytime a line of FILE matches the regexp, ALL is bound to the complete
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match, LETTERS is bound to the first sub-expression, and END is bound to the
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last one. Alternatively, given that `all' is not used, one can write:
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(substitute* file (\"foo([a-z]+)bar(.*)$\" _ letters end)
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(string-append \"baz\" letter end))
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"
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(substitute file regexp
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(lambda (m p)
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(let-matches 0 m (whole-match match ...)
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(display (begin body ...) p)))))
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;;; Local Variables:
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;;; Local Variables:
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;;; eval: (put 'call-with-output-file/atomic 'scheme-indent-function 1)
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;;; eval: (put 'call-with-output-file/atomic 'scheme-indent-function 1)
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;;; eval: (put 'with-throw-handler 'scheme-indent-function 1)
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;;; eval: (put 'with-throw-handler 'scheme-indent-function 1)
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