Being able to take a derivation and query the build information is useful, but
in cases where there are multiple derivations that produce the same outputs,
the probability of getting the data back from Cuirass is reduced.
This is because Cuirass might not have build the exact derivation you have,
but a different derivation that produces the same outputs (this can commonly
happen when a related fixed output derivation changes).
Cuirass doesn't store derivations if they produce the same outputs as a
derivation it already knows about, so it can't determine if this is the
case. Therefore, provide a way of querying build results by output, rather
than derivation.
The motivation behind this is to make it easier to import build information in
to the Guix Data Service.
* src/cuirass/database.scm (db-get-output): New procedure.
* src/cuirass/http.scm (respond-output-not-found): New procedure.
(request-path-components): Handle /output/… requests.
* doc/cuirass.texi (Build information): Mention that you can get build
information by output.
* src/cuirass/database.scm (db-add-evaluation): Record the creation of new
evaluations as events.
(db-set-evaluation-done): Record when evaluations finish as an event.
* src/cuirass/http.scm (url-handler): Add a new /api/evaluation-events page.
Add a table to store events, which have a type and a JSON blob. These can be
used to record changes, this commit inserts events when new builds are
created, and when the status of builds change.
The EventsOutbox table is then used to track when events have been sent
out. This is done through the new cuirass-send-events script.
* Makefile.am (bin_SCRIPTS): Add bin/cuirass-send-events.
.gitignore: Add bin/cuirass-send-events.
(dist_pkgmodule_DATA): Add src/cuirass/send-events.scm.
(dist_sql_DATA): Add src/sql/upgrade-5.sql.
(EXTRA_DIST): bin/cuirass-send-events.in.
(bin/cuirass-send-events): New rule.
* bin/cuirass-send-events.in: New file.
* src/cuirass/send-events.scm: New file.
* src/sql/upgrade-5.sql: New file.
* src/cuirass/database.scm (changes-count): New procedure.
(db-update-build-status!): Call db-add-event after updating the build status.
(db-add-event): New procedure.
(db-add-build): Insert an event when a new build is inserted.
(db-delete-events-with-ids-<=-to): New procedure.
* src/schema.sql (Events): New table.
* src/cuirass/database.scm (query->bind-arguments): New procedure.
(db-get-builds-by-search): Support filtering by spec and system.
(db-get-builds-query-min, db-get-builds-query-max): Adjust.
* src/cuirass/database.scm (db-get-builds-by-search, db-get-builds-query-min,
db-get-builds-query-max): New procedures.
* src/cuirass/http.scm (handle-builds-search-request): New procedure.
(url-handler): Handle "search" route.
* src/cuirass/templates.scm (search-form): New variable.
(html-page): Use it.
(build-search-results-table): New procedure.
* src/cuirass/database.scm (expect-one-row): New procedure.
(db-get-build, db-get-evaluations-id-min, db-get-evaluations-id-max,
db-get-builds-min, db-get-builds-max, db-get-evaluation-specification): Use
it.
* src/cuirass/database.scm (db-get-evaluation-specification): New exported
procedure.
* src/cuirass/http.scm (respond-html): Allow to pass CODE as argument.
(respond-html-eval-not-found): New procedure.
(url-handler): Fill navigation arguments. Handle the case where the
evaluation doesn't exist.
* src/cuirass/templates.scm (navigation-items): New procedure.
(html-page): Add navigation bar.
Co-authored-by: Clément Lassieur <clement@lassieur.org>
* src/cuirass/database.scm (db-get-builds): Add 'succeeded' and 'failed'
status filters.
(db-get-builds-min, db-get-builds-max): Add support for a new 'status'
argument.
* src/cuirass/http.scm (url-handler): Add a status argument for the '/eval/id'
endpoint.
* src/cuirass/templates.scm (evaluation-badges): Add links to the buttons.
(build-eval-table): Add a 'status' argument.
Co-authored-by: Clément Lassieur <clement@lassieur.org>
* Makefile.am (dist_sql_DATA): Add 'src/sql/upgrade-4.sql'.
* src/cuirass/database.scm (db-add-output): New procedure.
(db-add-build): Call DB-ADD-OUTPUT, rollback the transaction and return #f if
DB-ADD-OUTPUT returned an empty list.
* src/schema.sql (Outputs): Set 'path' as primary key, instead of 'derivation,
name'.
* src/sql/upgrade-4.sql: New file with SQL queries to upgrade the database.
* tests/database.scm (make-dummy-build): Use the #:OUTPUTS key. Get default
OUTPUTS to depend on DRV.
("db-add-build-with-fixed-output"): New test.
It is used to know when a new evaluation must be triggered and to display
input changes.
* Makefile.am (dist_sql_DATA): Add 'src/sql/upgrade-3.sql'.
* bin/cuirass.in (main): Call DB-SET-EVALUATION-DONE at startup to clear
'in-progress' evaluations.
* bin/evaluate.in (input-checkout, format-checkouts): Rename '#:name' to
'#:input'.
* doc/cuirass.texi (Stamps): Remove section.
(Checkouts): New section.
* src/cuirass/base.scm (fetch-input, fetch-inputs, compile-checkouts): Rename
'#:name' to '#:input'.
(evaluate): Remove the COMMITS argument. Add an EVAL-ID argument. Don't call
DB-ADD-EVALUATION because it was called sooner. Remove the EVAL-ID argument
to AUGMENT-JOB because it's a closure.
(build-packages): Add an EVAL-ID argument. Call DB-SET-EVALUATION-DONE once
all the derivations are registered.
(process-specs): Replace the stamping mechanism by the primary key constraint
of the Checkouts table: call "evaluate" only when DB-ADD-EVALUATION is true,
which means that at least one checkout was added. Change the EVALUATE and
BUILD-PACKAGES arguments accordingly.
* src/cuirass/database.scm (db-add-stamp, db-get-stamp): Remove procedures.
(db-set-evaluations-done, db-set-evaluation-done): New exported procedure.
(db-add-checkout): New procedure that returns #f if a checkout with the same
revision already exists.
(db-add-evaluation): Replace the EVAL argument with a SPEC-NAME and a
CHECKOUTS arguments. Insert the evaluation only if at least one checkout was
inserted. Return #f otherwise.
(db-get-checkouts): New procedure.
(db-get-evaluations, db-get-evaluations-build-summary): Handle the
'in_progress' column, remove the 'commits' column. Return the result of
DB-GET-CHECKOUTS as part of the evaluation.
* src/cuirass/templates.scm (input-changes, evaluation-badges): New
procedures.
(evaluation-info-table): Rename "Commits" to "Input changes". Use
INPUT-CHANGES to display the input changes that triggered the evaluation. Use
EVALUATION-BADGES to display a message indicating that the evaluation is in
progress.
* src/schema.sql (Stamps): Remove table.
(Checkouts): New table.
(Evaluations): Remove the 'commits' column. Add an 'in_progress' column.
* src/sql/upgrade-3.sql: New file with SQL queries to upgrade the database.
* tests/database.scm (make-dummy-eval): Remove procedure.
(make-dummy-checkouts): New procedure.
("sqlite-exec"): Remove the 'commits' column. Add the 'in_progress' column.
("db-update-build-status!", "db-get-builds", "db-get-pending-derivations"):
Update the arguments of DB-ADD-EVALUATION accordingly.
* tests/http.scm (hash-table=?): Add support for lists of hash tables.
(evaluations-query-result): Replace '#:commits' with '#:checkouts'. Return a
list instead of returning one element, for symmetry.
("fill-db"): Add a new input so that the second checkout can refer to it.
Replace EVALUATION1 and EVALUATION2 with CHECKOUTS1 and CHECKOUTS2. Update
the arguments of DB-ADD-EVALUATION accordingly.
("/api/queue?nr=100"): Take the CAR of the EVALUATIONS-QUERY-RESULT list to
make it symmetrical with the other argument of HASH-TABLE=?.
Fixes <https://bugs.gnu.org/32234>.
* bin/cuirass.in (main): Keep only one WITH-DATABASE call around all fibers.
Remove all DB arguments.
* src/cuirass/base.scm (evaluate, update-build-statuses!, spawn-builds,
handle-build-event, build-packages): Remove all DB arguments.
(clear-build-queue, cancel-old-builds): Wrap in WITH-DB-CRITICAL-SECTION,
remove all DB arguments.
(restart-builds): Remove the NON-BLOCKING call, remove all DB arguments.
(process-specs): Remove all DB arguments, remove the WITH-DATABASE call.
* src/cuirass/database.scm (%db-channel): New parameter.
(with-db-critical-section): New macro.
(db-add-input, db-add-specification, db-get-inputs, db-get-specifications,
db-add-evaluation, db-add-build, db-update-build-status!, db-get-outputs,
db-get-builds, db-get-build, db-get-pending-derivations, db-get-stamp,
db-add-stamp, db-get-evaluations, db-get-evaluations-build-summary,
db-get-evaluations-id-min, db-get-evaluations-id-max, db-get-builds-min,
db-get-builds-max): Wrap in WITH-DB-CRITICAL-SECTION, remove all DB arguments.
(with-database): Wrap BODY in PARAMETERIZE form that sets %DB-CHANNEL to the
channel returned by MAKE-CRITICAL-SECTION.
* src/cuirass/http.scm (handle-build-request, handle-builds-request): Remove
all DB arguments.
(url-handler): Remove all DB arguments, remove the DB-CHANNEL state, remove
the WITH-CRITICAL-SECTION calls.
(run-cuirass-server): Remove the DB arguments, remove the
MAKE-CRITICAL-SECTION call.
* src/cuirass/utils.scm (make-critical-section): Replace SPAWN-FIBER with
CALL-WITH-NEW-THREAD. Wrap body in PARAMETERIZE form that clears
CURRENT-FIBER.
* tests/database.scm (with-temporary-database, "db-add-specification",
"db-add-build", "db-update-build-status!", "db-get-builds",
"db-get-pending-derivations"): Remove the DB arguments.
("db-init"): Set the %DB-CHANNEL parameter to the channel returned by
MAKE-CRITICAL-SECTION, and return #t.
("database"): Set %DB-CHANNEL to #f during cleanup.
* tests/http.scm ("db-init"): Set the %DB-CHANNEL parameter to the channel
returned by MAKE-CRITICAL-SECTION, and return #t.
("cuirass-run", "fill-db"): Remove the DB arguments.
("http"): Set %DB-CHANNEL to #f during cleanup.
Fixes <https://bugs.gnu.org/32190>.
* Makefile.am (dist_sql_DATA): Add 'src/sql/upgrade-2.sql'.
* doc/cuirass.texi (Derivations): Remove section.
(Builds): Update accordingly. Add columns from the Derivations table.
(Outputs): Replace 'id' with 'derivation'.
* src/cuirass/base.scm (evaluate): Don't add jobs to the Derivations table.
(build-packages): Add columns that were in the Derivations table before. Only
build the derivations that were successfully registered, that is, those that
didn't exist in the Builds table. Give a derivation instead of a build id to
DB-GET-BUILD. Compute the number of failed jobs based on the derivations that
were added to the table, instead of the jobs.
* src/cuirass/database.scm (db-add-derivation, db-get-derivation): Remove
exported procedures.
(db-add-build): Catch SQLITE_CONSTRAINT_PRIMARYKEY error, which means that two
jobs produced the same derivation, and return #f in that case. Add columns
that were in the Derivations table before. Use 'derivation' as primary key
for the Outputs table.
(db-get-outputs): Use 'derivation' as identifier, instead of 'build-id'.
(filters->order): Replace 'id' with 'rowid'.
(db-get-builds): Add a 'derivation' filter. Replace 'id' with 'rowid'.
Remove the 'INNER JOIN Derivations'. Replace Derivations with Builds. Return
'derivation' in first position to make it clear that it's the primary key.
Pass DERIVATION instead of ID to DB-GET-OUTPUTS.
(db-get-build): Allow to take a derivation as argument. Use NUMBER? to
differentiate between derivations and ids.
(db-get-pending-derivations): Remove the 'SELECT DISTINCT' clause now that
derivations are unique. Remove the 'INNER JOIN Builds'.
(db-get-evaluations-build-summary, db-get-builds-min, db-get-builds-max):
Replace 'id' with 'rowid'.
* src/schema.sql (Derivations): Remove table.
(Outputs): Replace Builds.id with Builds.derivation.
(Builds): Use 'derivation' as primary key. Remove the 'id' column. Add
'job_name', 'system', 'nix_name' columns that were in the Derivations table
before.
(Builds_Derivations_index): Rename to Builds_index. Update accordingly.
(Derivations_index): Remove index.
* src/sql/upgrade-2.sql: New file with SQL queries to upgrade the database.
* tests/database.scm (make-dummy-job, make-dummy-derivation): Remove
procedures.
(make-dummy-build): Add columns that were in MAKE-DUMMY-DERIVATION. Get the
DRV parameter to be mandatory because it's a primary key.
(%id): Remove parameter.
("db-add-derivation", "db-get-derivation"): Remove tests.
("db-add-build"): Expect #f, because it adds twice the same derivation. Pass
the derivation argument to MAKE-DUMMY-BUILD.
("db-update-build-status!"): Rename 'id' to 'derivation'. Pass the derivation
argument to MAKE-DUMMY-BUILD. Remove the DB-ADD-DERIVATION call.
("db-get-builds", "db-get-pending-derivations"): Pass the derivation argument
to MAKE-DUMMY-BUILD. Remove the DB-ADD-DERIVATION calls.
* tests/http.scm ("fill-db"): Remove DERIVATION1 and DERIVATION2, and put
their content in BUILD1 and BUILD2. Remove the DB-ADD-DERIVATION calls.
Fixes <https://bugs.gnu.org/32300>.
* src/cuirass/database.scm (filters->order): New procedure.
(db-get-builds): Remove FORMAT-OUTPUT, CONS-OUTPUT, COLLECT-OUTPUTS,
FINISH-GROUP, SAME-GROUP?, GROUP-OUTPUTS procedures. Remove the 'LEFT JOIN
Outputs' clause. Use DB-GET-OUTPUTS for each build that was fetched.
Fixes <https://bugs.gnu.org/32330>.
* src/cuirass/database.scm (%package-database): Change default file name from
/var/run/cuirass/cuirass.db to /var/lib/cuirass/cuirass.db.
* src/cuirass/database.scm (db-get-evaluations-build-summary): Use a 'LEFT
JOIN' instead of a 'JOIN', with 'Evaluations' on the left, so that evaluations
are displayed even when they don't have associated builds.
This disables mutexing on database connection and prepared statement objects,
thus making us responsible for serializing access to database connections and
prepared statements. It may result in a performance improvement.
* src/cuirass/database.scm (db-init, db-open): Pass the SQLITE_OPEN_NOMUTEX
flag to SQLITE-OPEN.
* Makefile.am (dist_sql_DATA): Add src/sql/upgrade-1.sql.
* bin/cuirass.in (show-help, %options, main): Remove the LOAD-PATH option that
was used afterwards as %GUIX-PACKAGE-PATH.
* bin/evaluate.in (absolutize, input-checkout, spec-source, spec-load-path,
spec-package-path, format-checkouts): New procedures.
(%not-colon): Remove variable.
(main): Take the load path, package path and PROC from the checkouts that
result from the inputs. Format the checkouts before sending them to the
procedure. Remove the LOAD-PATH argument.
* doc/cuirass.texi (Overview, Database schema): Document the changes.
* examples/{guix-jobs.scm, hello-git.scm, hello-singleton.scm,
hello-subset.scm, random.scm}: Adapt to the new specification format.
* examples/guix-track-git.scm (package->spec): Rename to PACKAGE->INPUT.
(package->git-tracked): Replace FETCH-REPOSITORY with FETCH-INPUT and handle
the new format of its return value.
* examples/random-jobs.scm (make-random-jobs): Rename RANDOM to CHECKOUT.
Rename the checkout from 'random (which is a specification) to 'cuirass (which
is a checkout resulting from an input).
* src/cuirass/base.scm (fetch-repository): Rename to fetch-input. Rename SPEC
to INPUT. Return a checkout object instead of returning two values.
(evaluate): Take a list of CHECKOUTS and COMMITS as arguments, instead of
SOURCE. Remove TOKENIZE and LOAD-PATH. Pass the CHECKOUTS instead of the
SOURCE to "evaluate". Remove %GUIX-PACKAGE-PATH. Build the EVAL object
instead of getting it from "evaluate".
(compile?, fetch-inputs, compile-checkouts): New procedures.
(process-specs): Fetch all inputs instead of only fetching one repository.
The result of that fetching operation is a list of CHECKOUTS whose COMMITS are
used as a STAMP.
(%guix-package-path, set-guix-package-path): Remove them.
* src/cuirass/database.scm (db-add-input, db-get-inputs): New procedures.
(db-add-specification, db-get-specifications): Adapt to the new specification
format. Add/get all inputs as well.
(db-add-evaluation): Rename REVISION to COMMITS. Store COMMITS as space
separated commit hashes.
(db-get-builds): Rename REPO_NAME to NAME.
(db-get-stamp): Rename COMMIT to STAMP. Return #f when there is no STAMP.
(db-add-stamp): Rename COMMIT to STAMP. Deal with DB-GET-STAMP's new return
value.
(db-get-evaluations): Rename REVISION to COMMITS. Tokenize COMMITS.
* src/cuirass/utils.scm (%non-blocking): Export it.
* src/schema.sql (Inputs): New table that refers to the Specifications table.
(Specifications): Move input related fields to the Inputs table. Rename
REPO_NAME to NAME. Rename ARGUMENTS to PROC_ARGS. Rename FILE to PROC_FILE.
Add LOAD_PATH_INPUTS, PACKAGE_PATH_INPUTS and PROC_INPUT fields that refer to
the Inputs table.
(Stamps): Rename REPO_NAME to NAME.
(Evaluations): Rename REPO_NAME to NAME. Rename REVISION to COMMITS.
(Specifications_index): Replace with Inputs_index.
* src/sql/upgrade-1.sql: New file.
* tests/database.scm (example-spec, make-dummy-eval, sqlite-exec): Adapt to
the new specifications format. Rename REVISION to COMMITS.
* tests/http.scm (evaluations-query-result, fill-db): Idem.
This removes the possibility to filter specifications by branch, because
branches were previously called 'jobset'. But it doesn't matter because later
on, specifications will have as many branches as inputs. And people should
filter by specification name instead.
* doc/cuirass.texi (Build Information, Latest builds): Remove 'jobset',
replace 'project' with 'jobset'.
* src/cuirass/http.scm (build->hydra-build): Idem.
* tests/database.scm (db-get-builds): Idem.
* tests/http.scm (build-query-result, /api/latestbuilds?nr=1&jobset=guix,
/api/latestbuilds?nr=1&jobset=gnu): Idem.
* src/cuirass/database.scm (db-format-build, db-get-builds): Don't associate
builds with branches (which were called 'jobset' afterwards).
(db-get-builds): Remove the #:project filter.
* src/cuirass/database.scm (%package-sql-dir): New parameter.
(db-load, db-schema-version, db-set-schema-version, latest-db-schema-version,
schema-upgrade-file, db-upgrade): New procedures.
(db-init): Set version corresponding to the existing upgrade-n.sql files.
(db-open): If database exists, upgrade it.
Fixes a regression introduced in
1bab5c4e56 whereby the
'status+submission-time' order would no longer be honored.
As a result, /api/queue would return the queue ordered by build IDs,
making it largely useless.
* src/cuirass/database.scm (db-get-builds): Remove 'order' and rename
'order-column-name' to 'order'. Add case for 'status+submission-time'.
* tests/database.scm ("database")["db-get-builds"]: Move below
"db-update-build-status!" test. Add case for the
'status+submission-time' order.
Fixes a bug whereby some fibers would get a SQLITE_BUSY exception while
accessing the database: see
<https://debbugs.gnu.org/cgi/bugreport.cgi?bug=30644#26>.
Suggested by Danny Milosavljevic <dannym@scratchpost.org>.
* src/cuirass/database.scm (wal-mode): Rename to...
(set-db-options): ... this. Add call to 'sqlite-exec' for
'busy_timeout'.
* src/cuirass/database.scm (db-add-derivation): Catch 'sqlite-error and
handle SQLITE_CONSTRAINT_PRIMARYKEY.
(SQLITE_CONSTRAINT_UNIQUE): New variable.
* tests/database.scm ("database")["db-add-derivation"]: Add extra call to
'db-add-derivation'.
That makes it safe from SQL injection.
* src/cuirass/database.scm (db-get-builds): Rewrite to use question
marks in SQL queries and binding through '%sqlite-exec'.
* tests/database.scm ("database")["db-get-builds"]: Exercise 'WHERE'
clauses.
The new macro automatically takes care of inserting question marks in
the SQL queries, which in turn guarantees that there are always as many
question marks and arguments.
* src/cuirass/database.scm (sqlite-exec): Rename to...
(%sqlite-exec): ... this.
(sqlite-exec/bind, sqlite-exec): New macros.
(assq-refs): Remove.
(db-add-specification): Use the new 'sqlite-exec' form.
(db-get-specifications): Correctly deal with REV or TAG being #f.
(db-add-derivation, db-get-derivation, db-add-evaluation)
(db-add-build, db-update-build-status!, db-get-outputs)
(db-get-build, db-get-stamp, db-add-stamp): Adjust to the new
'sqlite-exec' form.
* src/cuirass/database.scm (db-update-build-status!): And "AND status != ?"
in SQL queries.
* tests/database.scm ("database")["db-update-build-status!"]: Add call
to 'db-update-build-status!'.
* src/cuirass/database.scm (%sqlite-exec): Remove.
(sqlite-exec): Turn back into a procedure. Use 'sqlite-bind'. Add
'normalize' procedure and use it.
(db-add-specification, db-add-derivation, db-get-derivation)
(db-add-evaluation, db-add-build, db-update-build-status!)
(db-get-build, db-get-stamp, db-add-stamp): Use question marks in SQL
queries.
* src/cuirass/base.scm (build-packages)[register]: Make #:log
non-false.
* tests/database.scm (make-dummy-job): Add #:job-name, #:system,
#:nix-name, and #:eval-id. This is necessary because 'sqlite-bind'
would now translate #f to a real NULL (before it would translate to the
string "#f"...), and would thus report violations of the non-NULL
constraint.
Co-authored-by: Ludovic Courtès <ludo@gnu.org>
* src/cuirass/database.scm (db-get-builds)[format-order-clause]: Add
'order' clauses.
* src/cuirass/http.scm (url-handler): Default to (order finish-time) for
/latestbuilds and (order submission-time) for /queue.
* src/cuirass/database.scm (sqlite-exec): Use (ice-9 format).
(db-update-build-status!): Add #:log-file parameter and honor it.
* tests/database.scm ("database")["db-update-build-status!"]: Test it.
* src/cuirass/database.scm (build-status): Add 'scheduled' and
'started'.
(db-add-build): Make sure #:timestamp, #:starttime, #:stoptime, and
#:status are integers.
(db-update-build-status!): New procedure.
* tests/database.scm ("database")["db-update-build-status!"]: New test.
* src/cuirass/utils.scm (define-enumeration): New macro.
* src/cuirass/database.scm (build-status): New macro.
* src/cuirass/base.scm (build-packages)[hydra-build-status]: Remove.
Use the 'build-status' macro instead.
* README: Mark Fibers as required.
* configure.ac: Check for Guile 2.2 only. Check for (fibers).
* bin/cuirass.in (main): Use (fibers). Run 'process-specs' and web
server in separate fibers.
* src/cuirass/base.scm (with-store): New macro.
(non-blocking-port): New procedure.
(evaluate): Use 'non-blocking-port'. Use 'read-string' followed by 'read'.
(process-specs): Move 'db-add-stamp' right after 'string=?' comparison.
Run evaluation and subsequent builds in a separate fiber.
* src/cuirass/http.scm (run-cuirass-server): Pass 'fibers as the second
argument to 'run-server'. Use 'log-message' instead of 'format'.
* src/cuirass/database.scm (with-database): Remove 'dynamic-wind'.
* src/cuirass/database.scm (db-get-builds): Make 'order' a separate
filter. Add 'format-limit-clause'. Reverse OUTPUTS.
* tests/database.scm (make-dummy-eval, make-dummy-derivation)
(make-dummy-build): New procedures.
(with-temporary-database): New macro.
("database"): Use 'make-dummy-build'.
("db-get-builds"): New test.
* doc/cuirass.texi (Sections)[Web API]: New section describing the HTTP API.
* src/cuirass/http.scm (spec->json-string): Move it to utils.scm and rename it
object->json-string.
(object->json-scm): Move it utils.scm.
(handle-*-request): New helpers procedures.
(request-parameters): New procedure to parse a request query.
(url-handler): Add new API's.
* src/cuirass/utils.scm (object->json-scm, object->json-string): Exported
procedures moved from http.scm.
* tests/http.scm: Add various tests on new HTTP API.
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.
* 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.
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.
