* guix/upstream.scm (preferred-upstream-source): New procedure.
* tests/upstream.scm ("preferred-upstream-source"): New test.

Change-Id: I4b48b44f1aa233d2e99bfe2e1359a670297efae8

This test was being skipped since
ea6fb108f6a3a53d48ea187b1f82b5f7ffce00a7.

* tests/upstream.scm ("coalesce-sources same version"): Compare a
serialized form of <upstream-source>.

* guix/upstream.scm (<upstream-input-change>): Remove.
(changed-inputs): Remove.
* tests/upstream.scm (test-package, test-new-package)
("changed-inputs returns no changes")
("changed-inputs returns changes to plain input list")
("changed-inputs returns changes to all plain input lists"): Remove.

Returning the expected list of inputs rather than changes relative to
the current package definition is less ambiguous and offers more
possibilities for further processing.

* guix/upstream.scm (<upstream-source>)[input-changes]: Remove.
[inputs]: New field.
(<upstream-input>): New record type.
* guix/upstream.scm (upstream-input-type-predicate)
(input-type-filter, upstream-source-regular-inputs)
(upstream-source-native-inputs, upstream-source-propagated-inputs): New
procedures.
(changed-inputs): Expect an <upstream-source> as its second argument.
Adjust accordingly.
* guix/import/pypi.scm (distribution-sha256): New procedure.
(maybe-inputs): Expect a list of <upstream-input>.
(compute-inputs): Rewrite to return a list of <upstream-input>.
(pypi-package-inputs, pypi-package->upstream-source): New procedures.
(make-pypi-sexp): Use it.
* guix/import/stackage.scm (latest-lts-release): Define 'cabal'.
Replace 'input-changes' field by 'inputs'.
* guix/scripts/refresh.scm (update-package): Use 'changed-inputs'
instead of 'upstream-source-input-changes'.
* tests/cran.scm ("description->package"): Adjust order of inputs.
* tests/pypi.scm (default-sha256, default-sha256/base32): New variables.
(foo-json): Add 'digests' entry.
("pypi->guix-package, no wheel"): Check HASH against DEFAULT-SHA256/BASE32.
("pypi->guix-package, wheels"): Likewise.
("pypi->guix-package, no usable requirement file."): Likewise.
("pypi->guix-package, package name contains \"-\" followed by digits"):
Likewise.
("package-latest-release"): New test.
* tests/upstream.scm (test-package-sexp): Remove.
("changed-inputs returns no changes"): Rewrite to use <upstream-source>.
(test-new-package-sexp): Remove.
("changed-inputs returns changes to plain input list"): Rewrite.
("changed-inputs returns changes to all plain input lists"): Likewise.
("changed-inputs returns changes to labelled input list")
("changed-inputs returns changes to all labelled input lists"): Remove.
* guix/import/cran.scm (maybe-inputs): Expect PACKAGE-INPUTS to be a
list of <upstream-input>.
(source-dir->dependencies): Return a list of <upstream-input>.
(vignette-builders): Likewise.
(uri-helper, cran-package-source-url)
(cran-package-propagated-inputs, cran-package-inputs): New procedures.
(description->package): Use them instead of local definitions.
(latest-cran-release): Replace 'input-changes' field by 'inputs'.
(latest-bioconductor-release): Likewise.
(format-inputs): Remove.
* guix/import/hackage.scm (cabal-package-inputs): New procedure.
(hackage-module->sexp): Use it.
[maybe-inputs]: Expect a list of <upstream-input>.

* tests/upstream.scm ("changed-inputs returns changes to plain input list",
"changed-inputs returns changes to all plain input lists"): New tests.

All these tests pass, because they only test the old-style input alists with
labels.

* tests/upstream.scm ("changed-inputs returns no changes",
"changed-inputs returns changes to labelled input list",
"changed-inputs returns changes to all labelled input lists"): New tests.

* tests/upstream.scm ("coalesce-sources same version"): Skip.

Before that '.log' files for scheme tests were fragmented and not
included in test-suite.log.  This unifies the semantics of SRFI-64 API
with Automake test suite.

* build-aux/test-driver.scm: New file.
* Makefile.am (SCM_LOG_DRIVER, AM_SCM_LOG_DRIVER_FLAGS): New variables.
(SCM_LOG_COMPILER, AM_SCM_LOG_FLAGS): Delete variables.
(AM_TESTS_ENVIRONMENT): Set GUILE_AUTO_COMPILE to 0.
* test-env.in: Silence guix-daemon.
* doc/guix.texi (Running the Test Suite): Describe how to display the
detailed results.  Bug reports require only 'test-suite.log' file.
* tests/base32.scm, tests/build-utils.scm, tests/builders.scm,
tests/challenge.scm, tests/cpan.scm, tests/cpio.scm, tests/cran.scm,
tests/cve.scm, tests/derivations.scm, tests/elpa.scm,
tests/file-systems.scm, tests/gem.scm, tests/gexp.scm,
tests/gnu-maintenance.scm, tests/grafts.scm, tests/graph.scm,
tests/gremlin.scm, tests/hackage.scm, tests/hash.scm,
tests/import-utils.scm, tests/lint.scm, tests/monads.scm, tests/nar.scm,
tests/packages.scm, tests/pk-crypto.scm, tests/pki.scm,
tests/profiles.scm, tests/publish.scm, tests/pypi.scm,
tests/records.scm, tests/scripts-build.scm, tests/scripts.scm,
tests/services.scm, tests/sets.scm, tests/size.scm, tests/snix.scm,
tests/store.scm, tests/substitute.scm, tests/syscalls.scm,
tests/system.scm, tests/ui.scm, tests/union.scm, tests/upstream.scm,
tests/utils.scm: Don't exit at the end of test groups.
* tests/containers.scm: Likewise.  Use 'test-skip' instead of exiting
with error code 77.

Previously, the resulting 'signature-urls' would contain N times the
same URL.

* guix/upstream.scm (coalesce-sources): Fix TWO in 'signature-urls'.
* tests/upstream.scm: New file.
* Makefile.am (SCM_TESTS): Add it.