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;;; mumi -- Mediocre, uh, mail interface
;;; Copyright © 2020 Ricardo Wurmus <rekado@elephly.net>
;;;
;;; This program is free software: you can redistribute it and/or
;;; modify it under the terms of the GNU Affero General Public License
;;; as published by the Free Software Foundation, either version 3 of
;;; the License, or (at your option) any later version.
;;;
;;; This program 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
;;; Affero General Public License for more details.
;;;
;;; You should have received a copy of the GNU Affero General Public
;;; License along with this program. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (mumi bugs)
#:use-module (mumi config)
#:use-module (debbugs)
#:use-module (sqlite3)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-26)
#:use-module (ice-9 rdelim)
#:use-module (ice-9 format)
#:export (db-create!
update-bug-database!
bugs-by-tag
bugs-by-severity
bugs-by-status
bugs-by-submitter
bugs-by-owner))
;; This procedure and the following two macros have been taken from
;; Cuirass.
(define (%sqlite-exec db sql . args)
"Evaluate the given SQL query with the given ARGS. Return the list of
rows."
(define (normalize arg)
;; Turn ARG into a string, unless it's a primitive SQL datatype.
(if (or (null? arg) (pair? arg) (vector? arg))
(object->string arg)
arg))
(let ((stmt (sqlite-prepare db sql #:cache? #t)))
(for-each (lambda (arg index)
(sqlite-bind stmt index (normalize arg)))
args (iota (length args) 1))
(let ((result (sqlite-fold-right cons '() stmt)))
(sqlite-finalize stmt)
result)))
(define-syntax sqlite-exec/bind
(lambda (s)
;; Expand to an '%sqlite-exec' call where the query string has
;; interspersed question marks and the argument list is separate.
(define (string-literal? s)
(string? (syntax->datum s)))
(syntax-case s ()
((_ db (bindings ...) tail str arg rest ...)
#'(sqlite-exec/bind db
(bindings ... (str arg))
tail
rest ...))
((_ db (bindings ...) tail str)
#'(sqlite-exec/bind db (bindings ...) str))
((_ db ((strings args) ...) tail)
(and (every string-literal? #'(strings ...))
(string-literal? #'tail))
;; Optimized case: only string literals.
(with-syntax ((query (string-join
(append (syntax->datum #'(strings ...))
(list (syntax->datum #'tail)))
"? ")))
#'(%sqlite-exec db query args ...)))
((_ db ((strings args) ...) tail)
;; Fallback case: some of the strings aren't literals.
#'(%sqlite-exec db (string-join (list strings ... tail) "? ")
args ...)))))
(define-syntax-rule (sqlite-exec db query args ...)
"Execute the specific QUERY with the given ARGS. Uses of 'sqlite-exec'
typically look like this:
(sqlite-exec db \"SELECT * FROM Foo WHERE x = \"
x \"AND Y=\" y \";\")
References to variables 'x' and 'y' here are replaced by question marks in the
SQL query, and then 'sqlite-bind' is used to bind them.
This ensures that (1) SQL injection is impossible, and (2) the number of
question marks matches the number of arguments to bind."
(sqlite-exec/bind db () "" query args ...))
(define (last-insert-rowid db)
(vector-ref (car (sqlite-exec db "SELECT last_insert_rowid();"))
0))
(define %db-name
(string-append (%config 'db-dir) "/bugs.db"))
(define* (with-db proc #:key write?)
(let ((db (sqlite-open %db-name (logior (if write?
SQLITE_OPEN_READWRITE
SQLITE_OPEN_READONLY)
SQLITE_OPEN_NOMUTEX))))
(dynamic-wind
(const #t)
(lambda ()
(proc db))
(lambda () (sqlite-close db)))))
(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-load db schema)
"Evaluate the file SCHEMA, which may contain SQL queries, into DB."
(for-each (cut sqlite-exec db <>)
(read-sql-file schema)))
(define (db-create!)
(unless (file-exists? %db-name)
(let ((db (sqlite-open %db-name (logior SQLITE_OPEN_CREATE
SQLITE_OPEN_READWRITE
SQLITE_OPEN_NOMUTEX))))
(db-load db (string-append (%config 'pkg-dir) "/schema.sql"))
db)))
(define (add-bug! id submitter owner status severity tags)
"Record a new bug with the given fields, or update an existing
record."
(let ((tag-string
(if tags (string-append "|"
(string-join (string-split tags #\space) "|" 'suffix))
"")))
(with-db (lambda (db)
(sqlite-exec db
"INSERT INTO bugs (id, submitter, owner, status, severity, tags) VALUES ("
id "," submitter "," owner "," status "," severity "," tag-string
") ON CONFLICT(id) DO UPDATE SET \
status=excluded.status,\
submitter=excluded.submitter,\
owner=excluded.owner,\
severity=excluded.severity,\
tags=excluded.tags;")
(last-insert-rowid db))
#:write? #t)))
(define (bugs-by-status status)
"Return all bug ids with the given STATUS."
(map (cut vector-ref <> 0)
(with-db
(lambda (db)
(sqlite-exec db
"SELECT id FROM bugs WHERE status = " status ";")))))
(define (bugs-by-severity severity)
"Return all bug ids with the given SEVERITY."
(map (cut vector-ref <> 0)
(with-db
(lambda (db)
(sqlite-exec db
"SELECT id FROM bugs WHERE severity = " severity ";")))))
(define (bugs-by-submitter submitter)
"Return all bug ids with the given SUBMITTER."
(map (cut vector-ref <> 0)
(with-db
(lambda (db)
(sqlite-exec db
"SELECT id FROM bugs WHERE submitter LIKE "
(string-append "%" submitter "%") ";")))))
(define (bugs-by-owner owner)
"Return all bug ids with the given OWNER."
(map (cut vector-ref <> 0)
(with-db
(lambda (db)
(sqlite-exec db
"SELECT id FROM bugs WHERE owner LIKE "
(string-append "%" owner "%") ";")))))
(define (bugs-by-tag tag)
"Return all bug ids that match the given TAG."
(map (cut vector-ref <> 0)
(with-db
(lambda (db)
(sqlite-exec db
"SELECT id FROM bugs WHERE tags LIKE "
(string-append "%|" tag "|%") ";")))))
(define (bug-ids)
"Return all bug ids."
(map (cut vector-ref <> 0)
(with-db
(lambda (db)
(sqlite-exec db "SELECT id FROM bugs;")))))
(define* (update-bug-database! #:optional bug-nums)
(define chunk-size 400)
(define (safe-split lst n)
(catch #t
(lambda ()
(split-at lst n))
(lambda _
(values lst '()))))
(let* ((bug-nums (or bug-nums
(apply lset-adjoin =
(append-map (lambda (package)
(soap-invoke (%config 'debbugs)
get-bugs
`((package . ,package))))
(%config 'packages))
(bug-ids))))
(total (length bug-nums)))
(display "updating bug database...")
;; Process bugs in chunks
(let loop ((lst bug-nums))
(let-values (((chunk tail) (safe-split lst chunk-size)))
(let ((bugs (soap-invoke* (%config 'debbugs) get-status chunk)))
(for-each (lambda (bug)
(add-bug! (bug-num bug)
(bug-originator bug)
(bug-owner bug)
(cond
((bug-done bug) "done")
(else "open"))
(bug-severity bug)
(bug-tags bug)))
bugs)
(let* ((done (- total (length tail)))
(ratio (/ done total)))
(if (eq? done total)
(display "100%!" (current-error-port))
(format (current-error-port)
"~,1f%..." (exact->inexact (* 100 ratio))))))
(if (null? tail) (newline (current-error-port)) (loop tail))))))
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