9f3ea03516
* guix/scripts/style.scm (absolute-location): Move to... * guix/diagnostics.scm (absolute-location): ... here. * guix/upstream.scm (update-package-source): Use it.
402 lines
14 KiB
Scheme
402 lines
14 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
||
;;; Copyright © 2012-2021, 2023 Ludovic Courtès <ludo@gnu.org>
|
||
;;;
|
||
;;; This file is part of GNU Guix.
|
||
;;;
|
||
;;; GNU Guix 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.
|
||
;;;
|
||
;;; GNU Guix 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
(define-module (guix diagnostics)
|
||
#:use-module (guix colors)
|
||
#:use-module (guix i18n)
|
||
#:use-module (srfi srfi-1)
|
||
#:use-module (srfi srfi-9)
|
||
#:use-module (srfi srfi-26)
|
||
#:use-module (srfi srfi-35)
|
||
#:use-module (ice-9 format)
|
||
#:use-module (ice-9 match)
|
||
#:export (warning
|
||
info
|
||
report-error
|
||
leave
|
||
|
||
<location>
|
||
location
|
||
location?
|
||
location-file
|
||
location-line
|
||
location-column
|
||
absolute-location
|
||
source-properties->location
|
||
location->source-properties
|
||
location->string
|
||
location->hyperlink
|
||
|
||
&error-location
|
||
error-location?
|
||
error-location
|
||
|
||
formatted-message
|
||
formatted-message?
|
||
formatted-message-string
|
||
formatted-message-arguments
|
||
|
||
&fix-hint
|
||
fix-hint?
|
||
condition-fix-hint
|
||
|
||
guix-warning-port
|
||
program-name
|
||
|
||
define-with-syntax-properties))
|
||
|
||
;;; Commentary:
|
||
;;;
|
||
;;; This module provides the tools to report diagnostics to the user in a
|
||
;;; consistent way: errors, warnings, and notes.
|
||
;;;
|
||
;;; Code:
|
||
|
||
(define (trivial-format-string? fmt)
|
||
(define len
|
||
(string-length fmt))
|
||
|
||
(let loop ((start 0))
|
||
(or (>= (+ 1 start) len)
|
||
(let ((tilde (string-index fmt #\~ start)))
|
||
(or (not tilde)
|
||
(case (string-ref fmt (+ tilde 1))
|
||
((#\a #\A #\%) (loop (+ tilde 2)))
|
||
(else #f)))))))
|
||
|
||
(define-syntax highlight-argument
|
||
(lambda (s)
|
||
"Given FMT and ARG, expand ARG to a call that highlights it, provided FMT
|
||
is a trivial format string."
|
||
;; Be conservative: limit format argument highlighting to cases where the
|
||
;; format string contains nothing but ~a escapes. If it contained ~s
|
||
;; escapes, this strategy wouldn't work.
|
||
(syntax-case s ()
|
||
((_ "~a~%" arg) ;don't highlight whole messages
|
||
#'arg)
|
||
((_ fmt arg)
|
||
(trivial-format-string? (syntax->datum #'fmt))
|
||
#'(%highlight-argument arg))
|
||
((_ fmt arg)
|
||
#'arg))))
|
||
|
||
(define* (%highlight-argument arg #:optional (port (guix-warning-port)))
|
||
"Highlight ARG, a format string argument, if PORT supports colors."
|
||
(cond ((string? arg)
|
||
;; If ARG contains white space, don't highlight it, on the grounds
|
||
;; that it may be a complete message in its own, like those produced
|
||
;; by 'guix lint.
|
||
(if (string-any char-set:whitespace arg)
|
||
arg
|
||
(highlight arg port)))
|
||
((symbol? arg)
|
||
(highlight (symbol->string arg) port))
|
||
(else arg)))
|
||
|
||
(define-syntax define-diagnostic
|
||
(syntax-rules ()
|
||
"Create a diagnostic macro (i.e., NAME), which will prepend PREFIX to all
|
||
messages."
|
||
((_ name (G_ prefix) colors)
|
||
(define-syntax name
|
||
(lambda (x)
|
||
(syntax-case x ()
|
||
((name location (underscore fmt) args (... ...))
|
||
(and (string? (syntax->datum #'fmt))
|
||
(free-identifier=? #'underscore #'G_))
|
||
#'(begin
|
||
(print-diagnostic-prefix prefix location
|
||
#:colors colors)
|
||
(format (guix-warning-port) (gettext fmt %gettext-domain)
|
||
(highlight-argument fmt args) (... ...))))
|
||
((name location (N-underscore singular plural n)
|
||
args (... ...))
|
||
(and (string? (syntax->datum #'singular))
|
||
(string? (syntax->datum #'plural))
|
||
(free-identifier=? #'N-underscore #'N_))
|
||
#'(begin
|
||
(print-diagnostic-prefix prefix location
|
||
#:colors colors)
|
||
(format (guix-warning-port)
|
||
(ngettext singular plural n %gettext-domain)
|
||
(highlight-argument singular args) (... ...))))
|
||
((name (underscore fmt) args (... ...))
|
||
(free-identifier=? #'underscore #'G_)
|
||
#'(name #f (underscore fmt) args (... ...)))
|
||
((name (N-underscore singular plural n)
|
||
args (... ...))
|
||
(free-identifier=? #'N-underscore #'N_)
|
||
#'(name #f (N-underscore singular plural n)
|
||
args (... ...)))
|
||
(id
|
||
(identifier? #'id)
|
||
;; Run-time variant.
|
||
#'(lambda (location fmt . args)
|
||
(emit-diagnostic fmt args
|
||
#:location location
|
||
#:prefix prefix
|
||
#:colors colors)))))))))
|
||
|
||
;; XXX: This doesn't work well for right-to-left languages.
|
||
;; TRANSLATORS: The goal is to emit "warning:" followed by a short phrase;
|
||
;; "~a" is a placeholder for that phrase.
|
||
(define-diagnostic warning (G_ "warning: ") %warning-color) ;emit a warning
|
||
(define-diagnostic info (G_ "") %info-color)
|
||
(define-diagnostic report-error (G_ "error: ") %error-color)
|
||
|
||
(define-syntax-rule (leave args ...)
|
||
"Emit an error message and exit."
|
||
(begin
|
||
(report-error args ...)
|
||
(exit 1)))
|
||
|
||
(define* (emit-diagnostic fmt args
|
||
#:key location (colors (color)) (prefix ""))
|
||
"Report diagnostic message FMT with the given ARGS and the specified
|
||
LOCATION, COLORS, and PREFIX.
|
||
|
||
This procedure is used as a last resort when the format string is not known at
|
||
macro-expansion time."
|
||
(print-diagnostic-prefix (gettext prefix %gettext-domain)
|
||
location #:colors colors)
|
||
(apply format (guix-warning-port) fmt
|
||
(if (trivial-format-string? fmt)
|
||
(map %highlight-argument args)
|
||
args)))
|
||
|
||
(define %warning-color (color BOLD MAGENTA))
|
||
(define %info-color (color BOLD))
|
||
(define %error-color (color BOLD RED))
|
||
|
||
(define* (print-diagnostic-prefix prefix #:optional location
|
||
#:key (colors (color)))
|
||
"Print PREFIX as a diagnostic line prefix."
|
||
(define color?
|
||
(color-output? (guix-warning-port)))
|
||
|
||
(define location-color
|
||
(if color?
|
||
(cut colorize-string <> (color BOLD))
|
||
identity))
|
||
|
||
(define prefix-color
|
||
(if color?
|
||
(lambda (prefix)
|
||
(colorize-string prefix colors))
|
||
identity))
|
||
|
||
(let ((prefix (if (string-null? prefix)
|
||
prefix
|
||
(gettext prefix %gettext-domain))))
|
||
(if location
|
||
(format (guix-warning-port) "~a: ~a"
|
||
(location-color
|
||
(if (supports-hyperlinks? (guix-warning-port))
|
||
(location->hyperlink location)
|
||
(location->string location)))
|
||
(prefix-color prefix))
|
||
(format (guix-warning-port) "~:[~*~;guix ~a: ~]~a"
|
||
(program-name) (program-name)
|
||
(prefix-color prefix)))))
|
||
|
||
|
||
;; A source location.
|
||
(define-record-type <location>
|
||
(make-location file line column)
|
||
location?
|
||
(file location-file) ; file name
|
||
(line location-line) ; 1-indexed line
|
||
(column location-column)) ; 0-indexed column
|
||
|
||
(define (location file line column)
|
||
"Return the <location> object for the given FILE, LINE, and COLUMN."
|
||
(and line column file
|
||
(make-location file line column)))
|
||
|
||
(define (source-properties->location loc)
|
||
"Return a location object based on the info in LOC, an alist as returned
|
||
by Guile's `source-properties', `frame-source', `current-source-location',
|
||
etc."
|
||
;; In accordance with the GCS, start line and column numbers at 1. Note
|
||
;; that unlike LINE and `port-column', COL is actually 0-indexed here...
|
||
(match loc
|
||
((('line . line) ('column . col) ('filename . file)) ;common case
|
||
(and file line col
|
||
(make-location file (+ line 1) col)))
|
||
(#f
|
||
#f)
|
||
(#(file line column)
|
||
;; Guile >= 3.0.6 uses vectors instead of alists internally, which can be
|
||
;; seen in the arguments to 'syntax-error' exceptions.
|
||
(location file (+ 1 line) column))
|
||
(_
|
||
(let ((file (assq-ref loc 'filename))
|
||
(line (assq-ref loc 'line))
|
||
(col (assq-ref loc 'column)))
|
||
(location file (and line (+ line 1)) col)))))
|
||
|
||
(define (location->source-properties loc)
|
||
"Return the source property association list based on the info in LOC,
|
||
a location object."
|
||
`((line . ,(and=> (location-line loc) 1-))
|
||
(column . ,(location-column loc))
|
||
(filename . ,(location-file loc))))
|
||
|
||
(define (location->string loc)
|
||
"Return a human-friendly, GNU-standard representation of LOC."
|
||
(match loc
|
||
(#f (G_ "<unknown location>"))
|
||
(($ <location> file line column)
|
||
(format #f "~a:~a:~a" file line column))))
|
||
|
||
(define (location->hyperlink location)
|
||
"Return a string corresponding to LOCATION, with escapes for a hyperlink."
|
||
(let ((str (location->string location))
|
||
(file (if (string-prefix? "/" (location-file location))
|
||
(location-file location)
|
||
(search-path %load-path (location-file location)))))
|
||
(if file
|
||
(file-hyperlink file str)
|
||
str)))
|
||
|
||
(define-condition-type &error-location &error
|
||
error-location?
|
||
(location error-location)) ;<location>
|
||
|
||
(define-condition-type &fix-hint &condition
|
||
fix-hint?
|
||
(hint condition-fix-hint)) ;string
|
||
|
||
(define-condition-type &formatted-message &error
|
||
formatted-message?
|
||
(format formatted-message-string)
|
||
(arguments formatted-message-arguments))
|
||
|
||
(define (check-format-string location format args)
|
||
"Check that FORMAT, a format string, contains valid escapes, and that the
|
||
number of arguments in ARGS matches the escapes in FORMAT."
|
||
(define actual-count
|
||
(length args))
|
||
|
||
(define allowed-chars ;for 'simple-format'
|
||
'(#\A #\S #\a #\s #\~ #\%))
|
||
|
||
(define (format-chars fmt)
|
||
(let loop ((chars (string->list fmt))
|
||
(result '()))
|
||
(match chars
|
||
(()
|
||
(reverse result))
|
||
((#\~ opt rest ...)
|
||
(loop rest (cons opt result)))
|
||
((chr rest ...)
|
||
(and (memv chr allowed-chars)
|
||
(loop rest result))))))
|
||
|
||
(match (format-chars format)
|
||
(#f
|
||
;; XXX: In this case it could be that FMT contains invalid escapes, or it
|
||
;; could be that it contains escapes beyond ALLOWED-CHARS, for (ice-9
|
||
;; format). Instead of implementing '-Wformat', do nothing.
|
||
#f)
|
||
(chars
|
||
(let ((count (fold (lambda (chr count)
|
||
(case chr
|
||
((#\~ #\%) count)
|
||
(else (+ count 1))))
|
||
0
|
||
chars)))
|
||
(unless (= count actual-count)
|
||
(warning location (G_ "format string got ~a arguments, expected ~a~%")
|
||
actual-count count))))))
|
||
|
||
(define-syntax formatted-message
|
||
(lambda (s)
|
||
"Return a '&formatted-message' error condition."
|
||
(syntax-case s (G_)
|
||
((_ (G_ str) args ...)
|
||
(string? (syntax->datum #'str))
|
||
(let ((str (syntax->datum #'str)))
|
||
;; Implement a subset of '-Wformat'.
|
||
(check-format-string (source-properties->location
|
||
(syntax-source s))
|
||
str #'(args ...))
|
||
(with-syntax ((str (string-append str "\n")))
|
||
#'(condition
|
||
(&formatted-message (format str)
|
||
(arguments (list args ...))))))))))
|
||
|
||
(define (absolute-location loc)
|
||
"Replace the file name in LOC by an absolute location."
|
||
(location (if (string-prefix? "/" (location-file loc))
|
||
(location-file loc)
|
||
|
||
;; 'search-path' might return #f in obscure cases, such as
|
||
;; when %LOAD-PATH includes "." or ".." and LOC comes from a
|
||
;; file in a subdirectory thereof.
|
||
(match (search-path %load-path (location-file loc))
|
||
(#f
|
||
(raise (formatted-message
|
||
(G_ "file '~a' not found on load path")
|
||
(location-file loc))))
|
||
(str str)))
|
||
(location-line loc)
|
||
(location-column loc)))
|
||
|
||
|
||
(define guix-warning-port
|
||
(make-parameter (current-warning-port)))
|
||
|
||
(define program-name
|
||
;; Name of the command-line program currently executing, or #f.
|
||
(make-parameter #f))
|
||
|
||
|
||
(define-syntax define-with-syntax-properties
|
||
(lambda (x)
|
||
"Define BINDING to be a syntax form replacing each VALUE-IDENTIFIER and
|
||
SYNTAX-PROPERTIES-IDENTIFIER in body by the syntax and syntax-properties,
|
||
respectively, of each ensuing syntax object."
|
||
(syntax-case x ()
|
||
((_ (binding (value-identifier syntax-properties-identifier)
|
||
...)
|
||
body ...)
|
||
(and (and-map identifier? #'(value-identifier ...))
|
||
(and-map identifier? #'(syntax-properties-identifier ...)))
|
||
#'(define-syntax binding
|
||
(lambda (y)
|
||
(with-ellipsis :::
|
||
(syntax-case y ()
|
||
((_ value-identifier ...)
|
||
(with-syntax ((syntax-properties-identifier
|
||
#`'#,(datum->syntax y
|
||
(syntax-source
|
||
#'value-identifier)))
|
||
...)
|
||
#'(begin body ...)))
|
||
(_
|
||
(syntax-violation #f (format #f
|
||
"Expected (~a~{ ~a~})"
|
||
'binding
|
||
'(value-identifier ...))
|
||
y)))))))
|
||
(_
|
||
(syntax-violation #f "Expected a definition of the form \
|
||
(define-with-syntax-properties (binding (value syntax-properties) \
|
||
...) body ...)" x)))))
|