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doc: Drop documentation of deprecated procedures.

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* doc/guix.texi ("build systems"): Drop documentation of
  BUILD-EXPRESSION->DERIVATION.
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Andreas Enge 2016-02-13 20:08:26 +01:00
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@ -3022,59 +3022,6 @@ best course of action for that is to write the build code as a
``G-expression'', and to pass it to @code{gexp->derivation}. For more
information, @pxref{G-Expressions}.
Once upon a time, @code{gexp->derivation} did not exist and constructing
derivations with build code written in Scheme was achieved with
@code{build-expression->derivation}, documented below. This procedure
is now deprecated in favor of the much nicer @code{gexp->derivation}.
@deffn {Scheme Procedure} build-expression->derivation @var{store} @
@var{name} @var{exp} @
[#:system (%current-system)] [#:inputs '()] @
[#:outputs '("out")] [#:hash #f] [#:hash-algo #f] @
[#:recursive? #f] [#:env-vars '()] [#:modules '()] @
[#:references-graphs #f] [#:allowed-references #f] @
[#:local-build? #f] [#:substitutable? #t] [#:guile-for-build #f]
Return a derivation that executes Scheme expression @var{exp} as a
builder for derivation @var{name}. @var{inputs} must be a list of
@code{(name drv-path sub-drv)} tuples; when @var{sub-drv} is omitted,
@code{"out"} is assumed. @var{modules} is a list of names of Guile
modules from the current search path to be copied in the store,
compiled, and made available in the load path during the execution of
@var{exp}---e.g., @code{((guix build utils) (guix build
gnu-build-system))}.
@var{exp} is evaluated in an environment where @code{%outputs} is bound
to a list of output/path pairs, and where @code{%build-inputs} is bound
to a list of string/output-path pairs made from @var{inputs}.
Optionally, @var{env-vars} is a list of string pairs specifying the name
and value of environment variables visible to the builder. The builder
terminates by passing the result of @var{exp} to @code{exit}; thus, when
@var{exp} returns @code{#f}, the build is considered to have failed.
@var{exp} is built using @var{guile-for-build} (a derivation). When
@var{guile-for-build} is omitted or is @code{#f}, the value of the
@code{%guile-for-build} fluid is used instead.
See the @code{derivation} procedure for the meaning of
@var{references-graphs}, @var{allowed-references}, @var{local-build?},
and @var{substitutable?}.
@end deffn
@noindent
Here's an example of a single-output derivation that creates a directory
containing one file:
@lisp
(let ((builder '(let ((out (assoc-ref %outputs "out")))
(mkdir out) ; create /gnu/store/@dots{}-goo
(call-with-output-file (string-append out "/test")
(lambda (p)
(display '(hello guix) p))))))
(build-expression->derivation store "goo" builder))
@result{} #<derivation /gnu/store/@dots{}-goo.drv => @dots{}>
@end lisp
@node The Store Monad
@section The Store Monad