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#!/usr/bin/env perl
#
# Copyright (C) 2022-2023 Free Software Foundation, Inc.
# Contributed by Arsen Arsenović.
#
# This script 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, or (at your option)
# any later version.
# This script reads program output on STDIN, and out of it produces a block of
# dg-output lines that can be yanked at the end of a file. It will escape
# special ARE and Tcl constructs automatically.
#
# Each argument passed on the standard input is treated as a string to be
# replaced by ``.*'' in the final result. This is intended to mask out build
# paths, filenames, etc.
#
# Usage example:
# $ g++-13 -fcontracts -o test \
# 'g++.dg/contracts/contracts-access1.C' && \
# ./test |& dg-out-generator.pl 'g++.dg/contracts/contracts-access1.C'
# // { dg-output {contract violation in function Base::b at .*:11: pub > 0(\n|\r\n|\r)} }
# // { dg-output {\[level:default, role:default, continuation mode:never\](\n|\r\n|\r)} }
# // { dg-output {terminate called without an active exception(\n|\r\n|\r)} }
# You can now freely dump the above into your testcase.
use strict;
use warnings;
use POSIX 'floor';
my $escapees = '(' . join ('|', map { quotemeta } @ARGV) . ')';
sub gboundary($)
{
my $str = shift;
my $sz = 10.0;
for (;;)
{
my $bnd = join '', (map chr 64 + rand 27, 1 .. floor $sz);
return $bnd unless index ($str, $bnd) >= 0;
$sz += 0.1;
}
}
while (<STDIN>)
{
# Escape our escapees.
my $boundary;
if (@ARGV) {
# Checking this is necessary to avoid a spurious .* between all
# characters if no arguments are passed.
$boundary = gboundary $_;
s/$escapees/$boundary/g;
}
# Quote stuff special in Tcl ARE. This step also effectively nulls any
# concern about escaping. As long as all curly braces are escaped, the
# string will, when passing through the braces rule of Tcl, be identical to
# the input.
s/([[\]*+?{}()\\])/\\$1/g;
# Newlines should be more tolerant.
s/\n$/(\\n|\\r\\n|\\r)/;
# Then split out the boundary, replacing it with .*.
s/$boundary/.*/g if defined $boundary;
# Then, let's print it in a dg-output block. If you'd prefer /* keep in
# mind that if your string contains */ it could terminate the comment
# early. Maybe add an extra s!\*/!*()/!g or something.
print "// { dg-output {$_} }\n";
}
# File Local Vars:
# indent-tabs-mode: nil
# End:
|
