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;;; database.scm -- store evaluation and build results
;;; Copyright © 2016, 2017 Mathieu Lirzin <mthl@gnu.org>
;;;
;;; This file is part of Cuirass.
;;;
;;; Cuirass is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation, either version 3 of the License, or
;;; (at your option) any later version.
;;;
;;; Cuirass is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with Cuirass. If not, see <http://www.gnu.org/licenses/>.
(define-module (cuirass database)
#:use-module (cuirass config)
#:use-module (cuirass utils)
#:use-module (ice-9 match)
#:use-module (ice-9 rdelim)
#:use-module (sqlite3)
#:export (;; Procedures.
assq-refs
db-init
db-open
db-close
db-add-specification
db-get-specifications
db-add-stamp
db-get-stamp
db-add-evaluation
db-add-derivation
db-get-derivation
db-add-build
read-sql-file
read-quoted-string
sqlite-exec
;; Parameters.
%package-database
%package-schema-file
;; Macros.
with-database))
(define (sqlite-exec db msg . args)
"Wrap 'sqlite-prepare', 'sqlite-step', and 'sqlite-finalize'. Send message
MSG to database DB. MSG can contain '~A' and '~S' escape characters which
will be replaced by ARGS."
(let* ((sql (apply simple-format #f msg args))
(stmt (sqlite-prepare db sql))
(res (let loop ((res '()))
(let ((row (sqlite-step stmt)))
(if (not row)
(reverse! res)
(loop (cons row res)))))))
(sqlite-finalize stmt)
res))
(define %package-database
;; Define to the database file name of this package.
(make-parameter (string-append %localstatedir "/" %package ".db")))
(define %package-schema-file
;; Define to the database schema file of this package.
(make-parameter (string-append (or (getenv "CUIRASS_DATADIR")
(string-append %datadir "/" %package))
"/schema.sql")))
(define (read-sql-file file-name)
"Return a list of string containing SQL instructions from FILE-NAME."
(call-with-input-file file-name
(lambda (port)
(let loop ((insts '()))
(let ((inst (read-delimited ";" port 'concat)))
(if (or (eof-object? inst)
;; Don't cons the spaces after the last instructions.
(string-every char-whitespace? inst))
(reverse! insts)
(loop (cons inst insts))))))))
(define* (db-init #:optional (db-name (%package-database))
#:key (schema (%package-schema-file)))
"Open the database to store and read jobs and builds informations. Return a
database object."
(when (file-exists? db-name)
(format (current-error-port) "Removing leftover database ~a~%" db-name)
(delete-file db-name))
(let ((db (sqlite-open db-name (logior SQLITE_OPEN_CREATE
SQLITE_OPEN_READWRITE))))
(for-each (lambda (sql) (sqlite-exec db sql))
(read-sql-file schema))
db))
(define* (db-open #:optional (db (%package-database)))
"Open database to store or read jobs and builds informations. Return a
database object."
(if (file-exists? db)
(sqlite-open db SQLITE_OPEN_READWRITE)
(db-init db)))
(define (db-close db)
"Close database object DB."
(sqlite-close db))
(define* (assq-refs alst keys #:optional default-value)
(map (lambda (key) (or (assq-ref alst key) default-value))
keys))
(define (last-insert-rowid db)
(vector-ref (car (sqlite-exec db "SELECT last_insert_rowid();"))
0))
(define (db-add-specification db spec)
"Store specification SPEC in database DB and return its ID."
(apply sqlite-exec db "\
INSERT OR IGNORE INTO Specifications (repo_name, url, evaluate, load_path, file, \
proc, arguments, branch, tag, revision, no_compile_p) \
VALUES ('~A', '~A', '~A', '~A', '~A', '~S', '~S', '~A', '~A', '~A', ~A);"
(append
(assq-refs spec '(#:name #:url #:evaluate #:load-path #:file #:proc #:arguments))
(assq-refs spec '(#:branch #:tag #:commit) "NULL")
(list (if (assq-ref spec #:no-compile?) "1" "0"))))
(last-insert-rowid db))
(define (db-get-specifications db)
(let loop ((rows (sqlite-exec db "SELECT * FROM Specifications;"))
(specs '()))
(match rows
(() specs)
((#(name url evaluate load-path file proc args branch tag rev no-compile?)
. rest)
(loop rest
(cons `((#:name . ,name)
(#:url . ,url)
(#:evaluate . ,evaluate)
(#:load-path . ,load-path)
(#:file . ,file)
(#:proc . ,(with-input-from-string proc read))
(#:arguments . ,(with-input-from-string args read))
(#:branch . ,branch)
(#:tag . ,(if (string=? tag "NULL") #f tag))
(#:commit . ,(if (string=? rev "NULL") #f rev))
(#:no-compile? . ,(positive? no-compile?)))
specs))))))
(define (db-add-derivation db job)
"Store a derivation result in database DB and return its ID."
(sqlite-exec db "\
INSERT OR IGNORE INTO Derivations (derivation, job_name, evaluation)\
VALUES ('~A', '~A', '~A');"
(assq-ref job #:derivation)
(assq-ref job #:job-name)
(assq-ref job #:eval-id)))
(define (db-get-derivation db id)
"Retrieve a job in database DB which corresponds to ID."
(car (sqlite-exec db "SELECT * FROM Derivations WHERE derivation='~A';" id)))
(define (db-add-evaluation db eval)
(sqlite-exec db "\
INSERT INTO Evaluations (specification, revision) VALUES ('~A', '~A');"
(assq-ref eval #:specification)
(assq-ref eval #:revision))
(last-insert-rowid db))
(define-syntax-rule (with-database db body ...)
"Run BODY with a connection to the database which is bound to DB in BODY."
(let ((db (db-open)))
(dynamic-wind
(const #t)
(lambda () body ...)
(lambda () (db-close db)))))
(define* (read-quoted-string #:optional (port (current-input-port)))
"Read all of the characters out of PORT and return them as a SQL quoted
string."
(let loop ((chars '()))
(let ((char (read-char port)))
(cond ((eof-object? char) (list->string (reverse! chars)))
((char=? char #\') (loop (cons* char char chars)))
(else (loop (cons char chars)))))))
;; Extended error codes (see <sqlite3.h>).
;; XXX: This should be defined by (sqlite3).
(define SQLITE_CONSTRAINT 19)
(define SQLITE_CONSTRAINT_PRIMARYKEY
(logior SQLITE_CONSTRAINT (ash 6 8)))
(define (db-add-build db build)
"Store BUILD in database DB. This is idempotent."
(let ((derivation (assq-ref build #:derivation))
(eval-id (assq-ref build #:eval-id))
(log (assq-ref build #:log))
(output (assq-ref build #:output)))
(catch 'sqlite-error
(lambda ()
(sqlite-exec db "\
INSERT INTO Builds (derivation, evaluation, log, output)\
VALUES ('~A', '~A', '~A', '~A');"
derivation eval-id log output))
(lambda (key who code message . rest)
;; If we get a primary-key-constraint-violated error, that means we have
;; already inserted the same (derivation,eval-id,log) tuple, which we
;; can safely ignore.
(unless (= code SQLITE_CONSTRAINT_PRIMARYKEY)
(format (current-error-port)
"error: failed to add build (~s, ~s, ~s, ~s) to database: ~a~%"
derivation eval-id log output
message)
(apply throw key who code rest)))))
(last-insert-rowid db))
(define (db-get-stamp db spec)
"Return a stamp corresponding to specification SPEC in database DB."
(let ((res (sqlite-exec db "SELECT * FROM Stamps WHERE specification='~A';"
(assq-ref spec #:name))))
(match res
(() "")
((#(spec commit)) commit))))
(define (db-add-stamp db spec commit)
"Associate stamp COMMIT to specification SPEC in database DB."
(if (string-null? (db-get-stamp db spec))
(sqlite-exec db "\
INSERT INTO Stamps (specification, stamp) VALUES ('~A', '~A');"
(assq-ref spec #:name)
commit)
(sqlite-exec db "\
UPDATE Stamps SET stamp='~A' WHERE specification='~A';"
commit
(assq-ref spec #:name))))
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