* src/cuirass/templates.scm (specifications-table): Add RSS link.

* src/cuirass/templates.scm (evaluation-info-table): Add RSS link.

* src/cuirass/http.scm (url-handler): Pass the specification to
"db-get-builds" procedure.

* src/cuirass/http.scm (respond-xml): New procedure.
(url-handler): Use it for the RSS feed.

* src/cuirass/rss.scm: New file.
* Makefile.am (dist_pkgmodule_DATA): Add it.
* src/cuirass/http.scm (url-handler): Add "/events/rss" route.

* src/sql/upgrade-4.sql: New file.
* Makefile.am (dist_sql_DATA): Add it.
* src/schema.sql (Builds)[weather]: New field.
(Builds_weather_evaluation): New index.
* src/cuirass/database.scm (db-get-last-status): New procedure.
(db-update-build-status!): Use it and update the new weather field.
(db-get-builds): Adapt it.
* tests/http.scm (build-query-result): Ditto.

* src/cuirass/templates.scm (build-details): Move the weather icon.

* src/cuirass/remote-worker.scm (%workers-started?): New variable.
(remote-worker): Use it to start workers only once.

* src/cuirass/database.scm (db-get-builds): Add "oldevaluation" filter.
* src/cuirass/templates.scm (build-details): Add "history" argument.
* src/cuirass/http.scm (url-handler): Adapt it.

* src/cuirass/templates.scm (build-details): Display weather.

* src/cuirass/database.scm (build-weather): New macro.
(build-status->weather): New procedure.
(db-get-builds): Return the build weather using the new procedure.
* src/cuirass/http.scm (build->hydra-build): Also return the weather.
* src/cuirass/templates.scm (weather-class, weather-title): New procedures.
(build-eval-table): Display the weather.
* tests/database.scm ("db-get-build weather"): New tests.
* tests/http.scm (build-query-result): Adapt it.

* src/cuirass/database.scm (db-update-build-status): Only consider evaluations
that happened before the current one. This is useful when updating the build
status of old evaluations.

* src/cuirass/database.scm (db-get-worker): Handle the case where no worker
were found.

* src/sql/upgrade-3.sql: New file.
* Makefile.am (dist_sql_DATA): Add it.
* src/schema.sql (Builds)[last_status]: New field.
* src/cuirass/database.scm (db-update-build-status!): Honor it.
(db-get-builds): Return it.
* tests/database.scm ("db-update-build-status!"): New test.

Evaluations are added sequentially to database but builds are not always
registered nor performed in order. This means that a build corresponding to an
older evaluation can be returned first if it was completed last. Order by
descending evaluation id to prevent it.

* src/cuirass/database.scm (db-get-builds): Add "evaluation" order.
* src/cuirass/http.scm (url-handler): Order latestbuilds by descending
evaluation number.

* src/cuirass/database.scm (db-add-worker): Rename ...
(db-add-or-update-worker): ... into this new procedure.
(db-get-worker, db-remove-unresponsive-workers): New procedures.
* src/cuirass/remote-server.scm (%workers): Remove it.
(pop-build): Adapt it.
(remove-unresponsive-workers!): Remove it.
(read-worker-exp): Adapt it.
(zmq-start-proxy): Ditto.
* tests/database.scm ("db-add-worker"): Rename ...
("db-add-or-update-worker"): ... into this new test.
("db-get-worker", "db-remove-unresponsive-workers"): New tests.

* src/cuirass/templates (workers-status): Truncate long lines.

* src/cuirass/templates.scm (workers-status): Sort workers consistently.

* src/cuirass/templates.scm (workers-status): Remove unused "build-row"
procedure.

* src/cuirass/templates.scm (workers-status): Handle the case where multiple
builds are started on a worker.

* src/cuirass/database.scm (db-get-build-percentage): Prevent division by zero.

* src/cuirass/templates.scm (build-details): Fix build duration display.

* src/cuirass/database.scm (db-update-build-status!): Set starttime when the
build status is "submitted".

* src/cuirass/templates.scm (workers-status): Sort machines.

* src/cuirass/templates.scm (workers-status): Improve display.
* src/cuirass/http.scm (url-handler): Adapt it.

* src/cuirass/database.scm (db-get-build-percentage): New procedure.
* tests/database.scm ("db-get-build-percentage"): New test.

* src/sql/upgrade-2.sql: New file.
* Makefile.am (dist_sql_DATA): Add it.
* src/schema.sql (Workers): Add "machine field".
* src/cuirass/database.scm (db-get-builds): Return "worker" field.
(db-add-worker): Honor new "machine" field.
(db-get-workers): Ditto.
* src/cuirass/remote-worker.scm (remote-worker): Adapt it.
* src/cuirass/remote.scm (<worker>)[machine]: New field.
(worker-machine): New procedure.
(worker->sexp, sexp->worker): Adapt accordingly.
(generate-worker-name): Ditto.
* tests/database.scm (%dummy-worker): Add "machine" field.

* src/cuirass/remote-server.scm (remote-server): Have stdout/stderr
line-buffered.
* src/cuirass/remote-worker.scm (remote-worker): Ditto.
* src/cuirass/remote.scm (publish-server): Discard publish logs.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>

* src/cuirass/database.scm (db-get-builds-by-search): Fix pagination.

* tests/database.scm (db-init): Force database creation.
* tests/http.scm (db-init): Ditto.
* tests/metrics (db-init): Ditto.

Fix a regression introduced by cbc46267.

* src/cuirass/database.scm (db-get-builds): Collect BuildProducts id field.

* src/cuirass/remote.scm: New file.
* src/cuirass/remote-server.scm: New file.
* src/cuirass/remote-worker.scm: New file.
* bin/remote-server.in: New file.
* bin/remote-worker.in: New file.
* Makefile.am (bin_SCRIPTS): Add new binaries,
(dist_pkgmodule_DATA): add new files,
(EXTRA_DIST): add new binaries,
(bin/remote-server, bin/remote-worker): new targets.
* .gitignore: Add new binaries.
* bin/cuirass.in (%options): Add "--build-remote" option,
(show-help): document it,
(main): honor it.
* src/cuirass/base.scm (with-build-offload-thread): New macro,
(%build-remote?, %build-offload-channel): new parameters,
(make-build-offload-thread): new procedure,
(build-derivations/offload): new procedure,
(restart-builds): use it to offload builds when %build-remote? is set,
(build-packages): ditto.

src/cuirass/base.scm (build-packages): Remove debug message that can be
inaccurate if queue-size is superior to 1.

* src/sql/upgrade-17.sql: New file.
* Makefile.am (dist_sql_DATA): Add it.
* src/schema.sql (Builds): Add "machine" field.
* src/cuirass/database.scm (db-update-build-machine!): New procedure.
* src/cuirass/base.scm (handle-build-event): Use it to record the machine
performing the build.

* bin/cuirass.in (%options): Add "queue-size" argument.
(show-help): Document it.
(main): Honor it.
* src/cuirass/database.scm (%db-writer-queue-size): New parameter,
(with-queue-writer-worker): use it.

* src/cuirass/database.scm (db-get-evaluation): New procedure.
* src/cuirass/http.scm (url-handler): Add "/api/evaluation" route.

* src/cuirass/http.scm (build->hydra-build): Add "evaluation" field.

Rather than calling sqlite-reset before reading the rows, call sqlite-reset
after. I think this is important to stop SQLite getting stuck because the
statement is still live even though it's not being read from after these
procedures return.

Assuming I've got the ordering right, I think using sqlite-fold-right directly
is simpler code as well.

* src/cuirass/database.scm (db-get-builds-by-search, format-build-products,
db-get-events): Rewrite fetching result rows.