gexp: Add '=>' syntax to import computed modules.
* guix/gexp.scm (imported-files)[file-pair]: Add case for pairs where
the cdr is not a string.
(imported-modules): Support '=>' syntax in MODULES.
* tests/gexp.scm ("imported-files with file-like objects")
("gexp->derivation & with-imported-module & computed module"): New tests.
* doc/guix.texi (G-Expressions): Document '=>' syntax for
'with-imported-modules'.
This commit is contained in:
Ludovic Courtès
parent
4c0c4db070
commit
d938a58bee
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@ -4347,8 +4347,22 @@ of the @code{gexp?} type (see below.)
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@deffn {Scheme Syntax} with-imported-modules @var{modules} @var{body}@dots{}
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Mark the gexps defined in @var{body}@dots{} as requiring @var{modules}
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in their execution environment. @var{modules} must be a list of Guile
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module names, such as @code{'((guix build utils) (guix build gremlin))}.
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in their execution environment.
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Each item in @var{modules} can be the name of a module, such as
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@code{(guix build utils)}, or it can be a module name, followed by an
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arrow, followed by a file-like object:
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@example
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`((guix build utils)
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(guix gcrypt)
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((guix config) => ,(scheme-file "config.scm"
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#~(define-module @dots{}))))
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@end example
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@noindent
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In the example above, the first two modules are taken from the search
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path, and the last one is created from the given file-like object.
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This form has @emph{lexical} scope: it has an effect on the gexps
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directly defined in @var{body}@dots{}, but not on those defined, say, in
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@ -912,13 +912,17 @@ environment."
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(system (%current-system))
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(guile (%guile-for-build)))
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"Return a derivation that imports FILES into STORE. FILES must be a list
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of (FINAL-PATH . FILE-NAME) pairs; each FILE-NAME is read from the file
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system, imported, and appears under FINAL-PATH in the resulting store path."
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of (FINAL-PATH . FILE) pairs. Each FILE is mapped to FINAL-PATH in the
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resulting store path. FILE can be either a file name, or a file-like object,
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as returned by 'local-file' for example."
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(define file-pair
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(match-lambda
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((final-path . file-name)
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((final-path . (? string? file-name))
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(mlet %store-monad ((file (interned-file file-name
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(basename final-path))))
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(return (list final-path file))))
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((final-path . file-like)
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(mlet %store-monad ((file (lower-object file-like system)))
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(return (list final-path file))))))
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(mlet %store-monad ((files (sequence %store-monad
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@ -950,13 +954,27 @@ system, imported, and appears under FINAL-PATH in the resulting store path."
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(guile (%guile-for-build))
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(module-path %load-path))
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"Return a derivation that contains the source files of MODULES, a list of
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module names such as `(ice-9 q)'. All of MODULES must be in the MODULE-PATH
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search path."
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;; TODO: Determine the closure of MODULES, build the `.go' files,
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;; canonicalize the source files through read/write, etc.
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(let ((files (map (lambda (m)
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(let ((f (module->source-file-name m)))
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(cons f (search-path* module-path f))))
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module names such as `(ice-9 q)'. All of MODULES must be either names of
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modules to be found in the MODULE-PATH search path, or a module name followed
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by an arrow followed by a file-like object. For example:
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(imported-modules `((guix build utils)
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(guix gcrypt)
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((guix config) => ,(scheme-file …))))
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In this example, the first two modules are taken from MODULE-PATH, and the
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last one is created from the given <scheme-file> object."
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(mlet %store-monad ((files
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(mapm %store-monad
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(match-lambda
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(((module ...) '=> file)
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(return
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(cons (module->source-file-name module)
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file)))
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((module ...)
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(let ((f (module->source-file-name module)))
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(return
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(cons f (search-path* module-path f))))))
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modules)))
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(imported-files files #:name name #:system system
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#:guile guile)))
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@ -598,6 +598,23 @@
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get-bytevector-all))))
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files))))))
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(test-assertm "imported-files with file-like objects"
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(mlet* %store-monad ((plain -> (plain-file "foo" "bar!"))
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(q-scm -> (search-path %load-path "ice-9/q.scm"))
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(files -> `(("a/b/c" . ,q-scm)
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("p/q" . ,plain)))
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(drv (imported-files files)))
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(mbegin %store-monad
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(built-derivations (list drv))
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(mlet %store-monad ((dir -> (derivation->output-path drv))
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(plain* (text-file "foo" "bar!"))
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(q-scm* (interned-file q-scm "c")))
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(return
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(and (string=? (readlink (string-append dir "/a/b/c"))
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q-scm*)
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(string=? (readlink (string-append dir "/p/q"))
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plain*)))))))
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(test-equal "gexp-modules & ungexp"
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'((bar) (foo))
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((@@ (guix gexp) gexp-modules)
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@ -668,6 +685,28 @@
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(equal? '(chdir "/foo")
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(call-with-input-file b read))))))))
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(test-assertm "gexp->derivation & with-imported-module & computed module"
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(mlet* %store-monad
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((module -> (scheme-file "x" #~(begin
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(define-module (foo bar)
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#:export (the-answer))
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(define the-answer 42))))
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(build -> (with-imported-modules `(((foo bar) => ,module)
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(guix build utils))
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#~(begin
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(use-modules (guix build utils)
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(foo bar))
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mkdir-p
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(call-with-output-file #$output
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(lambda (port)
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(write the-answer port))))))
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(drv (gexp->derivation "thing" build))
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(out -> (derivation->output-path drv)))
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(mbegin %store-monad
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(built-derivations (list drv))
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(return (= 42 (call-with-input-file out read))))))
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(test-assertm "gexp->derivation #:references-graphs"
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(mlet* %store-monad
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((one (text-file "one" (random-text)))
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