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utils: Change `substitute' and `substitute*' to work with several regexps. 

* guix/build/utils.scm (substitute): Change to accept a `pattern+procs'
  parameter.  Iterate over it.
  (substitute*): Adjust accordingly.

* distro/base.scm (guile-1.8): Adjust accordingly.
master
Ludovic Courtès 2012-07-07 17:12:04 +02:00
parent 03f9609ad9
commit 4fa697e932
2 changed files with 46 additions and 33 deletions
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4
distro/base.scm
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@ -132,11 +132,11 @@ code.")
;; `libguile-readline.so' & co. are in the ;; `libguile-readline.so' & co. are in the
;; loader's search path. ;; loader's search path.
(substitute* "libguile/dynl.c" (substitute* "libguile/dynl.c"
("lt_dlinit.*$" match) (("lt_dlinit.*$" match)
(format #f (format #f
" ~a~% lt_dladdsearchdir(\"~a/lib\");~%" " ~a~% lt_dladdsearchdir(\"~a/lib\");~%"
match match
(assoc-ref outputs "out")))) (assoc-ref outputs "out")))))
%standard-phases))) %standard-phases)))
(inputs `(("patch/snarf" (inputs `(("patch/snarf"
,(search-path %load-path "distro/guile-1.8-cpp-4.5.patch")) ,(search-path %load-path "distro/guile-1.8-cpp-4.5.patch"))

57
guix/build/utils.scm
View File

@ -147,12 +147,17 @@ An error is raised when no such pair exists."
;;; Text substitution (aka. sed). ;;; Text substitution (aka. sed).
;;; ;;;
(define (substitute file pattern match-proc) (define (substitute file pattern+procs)
"For each line of FILE that matches PATTERN, a regexp, call (MATCH-PROC "PATTERN+PROCS is a list of regexp/two-argument procedure. For each line
MATCH OUTPUT-PORT)." of FILE, and for each PATTERN that it matches, call the corresponding PROC
(let* ((regexp (if (regexp? pattern) as (PROC MATCH OUTPUT-PORT)."
pattern (let* ((rx+proc (map (match-lambda
(make-regexp pattern regexp/extended))) (((? regexp? pattern) . proc)
(cons pattern proc))
((pattern . proc)
(cons (make-regexp pattern regexp/extended)
proc)))
pattern+procs))
(template (string-append file ".XXXXXX")) (template (string-append file ".XXXXXX"))
(out (mkstemp! template))) (out (mkstemp! template)))
(with-throw-handler #t (with-throw-handler #t
@ -163,13 +168,16 @@ MATCH OUTPUT-PORT)."
(if (eof-object? line) (if (eof-object? line)
#t #t
(begin (begin
(for-each (match-lambda
((regexp . proc)
(cond ((regexp-exec regexp line) (cond ((regexp-exec regexp line)
=> =>
(lambda (m) (lambda (m)
(match-proc m out))) (proc m out)))
(else (else
(display line out) (display line out)
(newline out))) (newline out)))))
rx+proc)
(loop (read-line in))))))) (loop (read-line in)))))))
(close out) (close out)
(rename-file template file)) (rename-file template file))
@ -190,27 +198,32 @@ MATCH OUTPUT-PORT)."
((let-matches index match () body ...) ((let-matches index match () body ...)
(begin body ...)))) (begin body ...))))
(define-syntax-rule (substitute* file (regexp whole-match match ...) (define-syntax-rule (substitute* file
body ...) ((regexp match-var ...) body ...)
...)
"Substitute REGEXP in FILE by the string returned by BODY. BODY is "Substitute REGEXP in FILE by the string returned by BODY. BODY is
evaluated with each MATCH-VAR bound to the corresponding positional regexp evaluated with each MATCH-VAR bound to the corresponding positional regexp
sub-expression. For example: sub-expression. For example:
(substitute* file (\"foo([a-z]+)bar(.*)$\" all letters end) (substitute* file
(string-append \"baz\" letters end)) ((\"hello\")
\"good morning\\n\")
((\"foo([a-z]+)bar(.*)$\" all letters end)
(string-append \"baz\" letter end)))
Here, anytime a line of FILE matches the regexp, ALL is bound to the complete Here, anytime a line of FILE contains \"hello\", it is replaced by \"good
match, LETTERS is bound to the first sub-expression, and END is bound to the morning\". Anytime a line of FILE matches the second regexp, ALL is bound to
last one. Alternatively, given that `all' is not used, one can write: the complete match, LETTERS is bound to the first sub-expression, and END is
bound to the last one.
(substitute* file (\"foo([a-z]+)bar(.*)$\" _ letters end) When one of the MATCH-VAR is `_', no variable is bound to the corresponding
(string-append \"baz\" letter end)) match substring."
(substitute file
" (list (cons regexp
(substitute file regexp
(lambda (m p) (lambda (m p)
(let-matches 0 m (whole-match match ...) (let-matches 0 m (match-var ...)
(display (begin body ...) p))))) (display (begin body ...) p))))
...)))
;;; Local Variables: ;;; Local Variables: