This avoids connections to substitute servers for derivations that are
not substitutable anyway, such as profiles.
Reported by Andy Wingo.
* guix/derivations.scm (substitution-oracle): Skip derivations that do
not pass 'substitutable-derivation?'.
* tests/derivations.scm ("substitution-oracle and #:substitute? #f"):
New test.
This leads a 13% speedup on 'guix build libreoffice -d' and 18% on
'guix build gnome -d'.
* guix/derivations.scm (%derivation-cache): New variable.
(read-derivation): Use it instead of the private 'cache' variable.
(derivation): Populate %DERIVATION-CACHE before returning.
* guix/derivations.scm (write-derivation)[write-input]: Use 'display'
instead of 'write' for PATH.
Use 'simple-format' instead of 'format', and '~a' instead of '~s' for
SYSTEM and BUILDER.
* guix/derivations.scm (derivation-input<?): New procedure.
(write-derivation)[coalesce-duplicate-inputs]: Remove.
Remove calls to 'sort'.
(coalesce-duplicate-inputs): New procedure.
(derivation-hash): Sort INPUTS and use 'coalesce-duplicate-inputs'.
(derivation)[input->derivation-input]
[coalesce-duplicate-inputs]: New procedures.
Sort OUTPUTS, INPUTS, and ENV-VARS.
* tests/derivations.scm ("read-derivation vs. derivation"): New test.
Suggested by Jookia.
* guix/derivations.scm (&file-search-error): New error condition.
(search-path*): Raise it when 'search-path' returns #f.
* guix/gexp.scm (search-path*): Remove.
* guix/ui.scm (call-with-error-handling): Add case for
'file-search-error?'.
* tests/derivations.scm ("build-expression->derivation and invalid
module name"): New test.
* guix/derivations.scm (substitution-oracle): Add #:mode parameter and
honor it.
(derivation-prerequisites-to-build): Likewise.
[derivation-built?]: Take it into account.
* guix/ui.scm (show-what-to-build): Add #:mode parameter. Pass it to
'substitute-oracle' and 'derivations-prerequisites-to-build'.
* tests/derivations.scm ("derivation-prerequisites-to-build in 'check'
mode"): New test.
Before that, "guix build qt", when only qt itself is missing, would lead
'substitution-oracle' to call 'substitutable-paths' with 318 items.
Now, this is down to 6 items, because it doesn't ask about prerequisites
that are already valid.
* guix/derivations.scm (substitution-oracle)[valid-input?,
dependencies]: New procedures.
Use 'dependencies' and remove call to 'remove'.
* guix/derivations.scm (valid-derivation-input?): New procedure.
(derivation-prerequisites): Add 'cut?' parameter and honor it.
* tests/derivations.scm ("derivation-prerequisites and
derivation-input-is-valid?"): New test.
Fixes <http://bugs.gnu.org/20188>.
Reported by Mark H Weaver <mhw@netris.org>.
* guix/derivations.scm (substitution-oracle): Add 'valid?' procedure.
Remove 'valid?' items from PATHS.
Fixes <http://bugs.gnu.org/19630>.
Reported by Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>.
* guix/derivations.scm (&derivation-error,
&derivation-missing-output-error): New error conditions.
(derivation->output-path): Raise a '&derivation-missing-output-error'
if OUTPUT is not an output of DRV.
* guix/ui.scm (call-with-error-handling): Add case for
'derivation-missing-output-error?'.
(show-what-to-build): Check whether (derivation-outputs drv) is
empty.
* tests/packages.scm ("reference to non-existent output"): Add test.
This yields a 46% improvement in 'derivation-prerequisites' invocations
on the Emacs derivation.
* guix/derivations.scm (derivation-prerequisites): Add 'input-set'
variable, and use it in iterations.
This makes 'guix environment PACKAGE' significantly faster when
substitutes are enabled. Before that, it would lead to many invocations
of 'guix substitute-binary', one per 'derivation-prerequisites-to-build'
call. Now, all these are replaced by a single invocation.
* guix/derivations.scm (derivation-output-paths, substitution-oracle):
New procedures.
(derivation-prerequisites-to-build): Replace #:use-substitutes? with
#:substitutable?. Remove the local 'derivation-output-paths' and
'substitutable?'.
* guix/ui.scm (show-what-to-build): Add 'substitutable?'. Pass it to
'derivation-prerequisites-to-build'.
[built-or-substitutable?]: Use it instead of 'has-substitutes?'.
* tests/derivations.scm ("derivation-prerequisites-to-build and
substitutes"): Use #:substitutable? instead of #:use-substitutes?.
* guix/derivations.scm (derivation-output-names): New procedure.
(derivation-prerequisites-to-build): Use it for #:outputs.
(map-derivation): Likewise.
* tests/derivations.scm ("derivation-output-names"): New test.
* guix/derivations.scm (<graft>): New record type.
(graft-derivation): Rename 'replacements' to 'grafts', and expect it
to be a list of <graft> records. Adjust accordingly.
* tests/derivations.scm ("graft-derivation"): Use 'graft' instead of
pairs in argument to 'graft-derivation'.
This reduces run time of (package-derivation s emacs) by ~5%.
* guix/derivations.scm (search-path*): New procedure.
(imported-modules): Use it instead of 'search-path'.
This reduces run time of (package-derivation s emacs) by ~10%.
* guix/derivations.scm (derivation-path->base16-hash): New procedure.
(derivation-hash): Use it.
* guix/derivations.scm (graft-derivation): New procedure.
* guix/build/graft.scm: New file.
* Makefile.am (MODULES): Add it.
* tests/derivations.scm ("graft-derivation"): New test.
* guix/derivations.scm (build-expression->derivation): Add
#:allowed-references and pass it to 'derivation.
* doc/guix.texi (Derivations): Adjust accordingly.
* guix/derivations.scm (derivation->string): New procedure.
(derivation-hash, derivation): Use it.
Memoization here yields a 5% improvement on "guix build -e '(@ (gnu
packages emacs) emacs)' -n --no-substitutes".
Ludovic Courtès