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80 lines
2.5 KiB
Perl
Executable File
80 lines
2.5 KiB
Perl
Executable File
#!/usr/bin/env perl
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#
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# Copyright (C) 2022-2024 Free Software Foundation, Inc.
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# Contributed by Arsen Arsenović.
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#
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# This script is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# any later version.
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# This script reads program output on STDIN, and out of it produces a block of
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# dg-output lines that can be yanked at the end of a file. It will escape
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# special ARE and Tcl constructs automatically.
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#
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# Each argument passed on the standard input is treated as a string to be
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# replaced by ``.*'' in the final result. This is intended to mask out build
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# paths, filenames, etc.
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#
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# Usage example:
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# $ g++-13 -fcontracts -o test \
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# 'g++.dg/contracts/contracts-access1.C' && \
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# ./test |& dg-out-generator.pl 'g++.dg/contracts/contracts-access1.C'
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# // { dg-output {contract violation in function Base::b at .*:11: pub > 0(\n|\r\n|\r)} }
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# // { dg-output {\[level:default, role:default, continuation mode:never\](\n|\r\n|\r)} }
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# // { dg-output {terminate called without an active exception(\n|\r\n|\r)} }
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# You can now freely dump the above into your testcase.
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use strict;
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use warnings;
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use POSIX 'floor';
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my $escapees = '(' . join ('|', map { quotemeta } @ARGV) . ')';
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sub gboundary($)
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{
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my $str = shift;
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my $sz = 10.0;
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for (;;)
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{
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my $bnd = join '', (map chr 64 + rand 27, 1 .. floor $sz);
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return $bnd unless index ($str, $bnd) >= 0;
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$sz += 0.1;
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}
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}
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while (<STDIN>)
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{
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# Escape our escapees.
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my $boundary;
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if (@ARGV) {
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# Checking this is necessary to avoid a spurious .* between all
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# characters if no arguments are passed.
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$boundary = gboundary $_;
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s/$escapees/$boundary/g;
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}
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# Quote stuff special in Tcl ARE. This step also effectively nulls any
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# concern about escaping. As long as all curly braces are escaped, the
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# string will, when passing through the braces rule of Tcl, be identical to
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# the input.
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s/([[\]*+?{}()\\])/\\$1/g;
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# Newlines should be more tolerant.
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s/\n$/(\\n|\\r\\n|\\r)/;
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# Then split out the boundary, replacing it with .*.
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s/$boundary/.*/g if defined $boundary;
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# Then, let's print it in a dg-output block. If you'd prefer /* keep in
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# mind that if your string contains */ it could terminate the comment
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# early. Maybe add an extra s!\*/!*()/!g or something.
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print "// { dg-output {$_} }\n";
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}
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# File Local Vars:
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# indent-tabs-mode: nil
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# End:
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