integration.

* bin/evaluate.in (fill-job): New procedure.
(main): Use it to fill informations (nix-name, system) that will later be
added to database.
* doc/cuirass.texi (Database)[Derivation]: Add system and nix_name fields.
(Database)[Builds]: Add id, status, timestamp, starttime and stoptime
fields. Remove output field.
(Database)[Outputs]: New table describing the build outputs.
* src/cuirass/base.scm (build-packages): Add new fields to build object before
adding it to database.
* src/cuirass/database.scm (db-get-build, db-get-builds): New procedures to get
a build by id from database and a list of builds using filter parameters
respectively.
* src/schema.sql (Outputs) : New table.
(Derivations): Add system and nix_name columns.
(Builds): Remove output column and add id, status, timestamp, starttime and
stoptime columns.

* README (Requirenments): Replace git with guile-git.

* src/cuirass/base.scm (process-specs): Set certificate location to the value
in GIT_SSL_CAINFO or SSL_CERT_DIR.

Fixes <https://bugs.gnu.org/28094>.
Reported by Ricardo Wurmus <rekado@elephly.net>.

* src/cuirass/database.scm (SQLITE_CONSTRAINT)
(SQLITE_CONSTRAINT_PRIMARYKEY): New variables.
(db-add-build): Catch 'sqlite-error, and swallow
SQLITE_CONSTRAINT_PRIMARYKEY errors.
* tests/database.scm ("db-add-build"): New test.

When current-processor-count is used without (ice-9 threads) being used, Guile
complains with the following warning:

Import (ice-9 threads) to have access to `current-processor-count'.

* src/cuirass/base.scm: Use (ice-9 threads).

* doc/cuirass.texi (Contribution): guix-devel@gnu.org is preferred for
  contributions.

* src/cuirass/base.scm (report-git-error): New procedure.
(with-git-error-handling): New macro.
(process-specs): Use with-git-error-handling to catch and report git errors.
* build-aux/guix.scm (package)[inputs]: Add guile-git.
* configure.ac: Check for (git) module. Also check that (git) exports
git-error-message procedure.

* src/cuirass/base.scm (&evaluation-error): New condition type.
(evaluate): Report an &evaluation-error if eof-object? is true on
data read from port. Otherwise, suppose that data are correct and keep things
going.
(process-specs): Catch &evaluation-error, report the error in the log and keep
going.

build-aux/guix.scm (package): Update to Guile 2.2.

* src/cuirass/base.scm (%fallback?): New exported parameter.
(process-specs)[set-build-options]: Pass fallback parameter.
* bin/cuirass.in (%options): Add fallback.
(main): Set %fallback? parameter.
(show-help): Update.

* src/cuirass/database.scm (db-get-stamp, db-add-stamp): Replace #:id
  by #:name. There is no #:id in specifications. Plus, the primary key
  of Specifications is #:name.

* src/cuirass/base.scm: Replace time-monotonic with time-tai with
  Guile 2.2, to avoid wrong evaluation durations.

* bin/cuirass.in: Replace λ by lambda.
* bin/evaluate.in: Ditto.
* build-aux/guix.scm: Ditto.
* examples/gnu-system.scm: Ditto.
* examples/guix-track-git.scm: Ditto.
* src/cuirass.scm: Ditto.
* src/cuirass/base.scm: Ditto.
* src/cuirass/database.scm: Ditto.
* src/cuirass/ui.scm: Ditto.
* src/cuirass/utils.scm: Remove λ* macro.

* Makefile.am (dist_pkgmodule_DATA): Remove repo.scm,
(TESTS): Remove repo.scm.
* build-aux/guix.scm (package)[disable-repo-tests]: Remove phase.
* src/cuirass/repo.scm: Remove.
* tests/repo.scm: Remove.

* src/cuirass/base.scm (copy-repository-cache) : New procedure.
(fetch-repository): Use latest-repository-commit to fetch git
repository instead of raw git system commands.
(process-specs): Use fetch-repository to get a store directory
containing the repository described in SPEC, add copy it to cache with
"copy-repository-cache".
* configure.ac: Check (guix git) module presence.

* src/cuirass/utils.scm (mkdir-p, make-user-module,
  call-with-temporary-directory, with-directory-excursion): Remove because
  already defined in guix.
* tests/utils (with-directory-excursion): Remove associated test.
* src/cuirass/base.scm: Use (guix build utils) to provide procedure removed
  from (cuirass utils).
* bin/evaluate.in: Ditto.
* bin/cuirass.in: Use "make-user-module" provided by (guix ui).

* src/cuirass/repo.scm (git-repo): Remove it.
* tests/repo.scm: Remove related tests.

git-repo is not used and it's usecases will be covered by (guix git).

* configure.ac (AC_INIT): Update homepage and bug report email.

Fixes a regression introduced in
a42cf16f whereby build logs would go the
Cuirass' stderr.

* src/cuirass/base.scm (build-packages): Parameterize
'current-build-output-port' to a void output port.

This is a followup to b4400bc9.

* Makefile.am (nodist_pkgmodule_DATA): New variable.
(nodist_pkgobject_DATA): Remove config.scm.
(do_subst): Use $(guileobjectdir).

* Makefile.am (guileobjectdir): New variable.
(nodist_guilesite_DATA): Rename to...
(nodist_guileobject_DATA): ... this.
(pkgobjectdir): New variable.
(nodist_pkgmodule_DATA): Rename to...
(nodist_pkgobject_DATA): ... this.

* Makefile.am (guilesitedir): Append @GUILE_EFFECTIVE_VERSION@.
* configure.ac: Use 'GUILE_PKG', and pass "2.2" first.

This fixes a test failure with Guile 2.2.

* tests/http.scm (hash-table-keys, hash-table=?): New procedures.
("spec->json-string"): Use it to compare the JSON objects.

* doc/cuirass.texi (Database): Replace instances of "path" with more accurate
terms.

* doc/cuirass.texi: Add "Database" node.

* doc/cuirass.texi (Introduction): Fix typos and use American English
spelling.

Co-authored-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>

This improves parallelism when 'max-jobs' is large.

* src/cuirass/base.scm (build-packages): Rewrite to pass the complete
list of derivations to 'build-derivations' at once.  Handle multiple outputs.
* src/schema.sql (Builds): Make "output" part of the primary key.

Co-authored-by: Mathieu Lirzin <mthl@gnu.org>

* src/cuirass/base.scm (fetch-repository): Remove 'file-exists?' call
before 'mkdir-p'.

* src/cuirass/base.scm (process-specs): Systematically call
'set-build-options'.  Pass #:keep-going? #t.

This fixes an issue in the database, where rows from the 'Evaluations' table
were having an "#f" value instead of a valid reference to their corresponding
specification.

* bin/evaluate.in (main): Use specification #:name instead of obsolete #:id.

* src/cuirass/base.scm (set-guix-package-path!): Parse colon separated
directories in load-path.

Co-authored-by: Mathieu Lirzin <mthl@gnu.org>

* doc/cuirass.texi (Contributing): Describe how to send patches.

* README <Contributing>: Point to the corresponding section in the manual.

Fixes https://notabug.org/mthl/cuirass/issues/1

.

* src/cuirass/base.scm (fetch-repository): Return #f when 'git clone' fails.
(process-specs): Test if commit is not #f before using its value.

Signed-off-by: Mathieu Lirzin <mthl@gnu.org>

* bin/cuirass.in (%options): Add "--load-path" and "-L" command line options.
(show-help): Adapt.
* src/cuirass/base.scm (%guix-package-path): New parameter.
(set-guix-package-path!): New procedure.
(evaluate): Call "evaluate" script with '%guix-package-path'.
* bin/evaluate.in (main): Match 'guix-package-path' command line argument and
handle it.

Signed-off-by: Mathieu Lirzin <mthl@gnu.org>

* build-aux/guix.scm (%aux-dir): New variable.  Use it.

* build-aux/guix.scm (spec+package-list): New procedure.  Use it.

* Makefile.am (.version): Remove target.
(EXTRA_DIST): Adapt.
(BUILT_SOURCES): Likewise.
* build-aux/guix.scm (git-version-gen): Call 'git-version-gen' with
'.tarball-version'.
* .gitignore: Update.

* doc/cuirass.texi (Contributing): Use "bug-cuirass@framalistes.org" email
address.

This fixes the issue of having multiple identical derivations associated with
an evaluation as reported by Ludovic Courtès <ludo@gnu.org> at
<https://lists.gnu.org/archive/html/guix-devel/2017-01/msg00109.html>.

* src/cuirass/database.scm (db-add-derivation): Ignore if JOB is already
present in DB.