mirror of
https://github.com/moparisthebest/curl
synced 2024-08-13 17:03:50 -04:00
6381708970
Forgetting to bump the year in the copyright clause when hacking has been quite common among curl developers, but a traditional checksrc check isn't a good fit as it would penalize anyone hacking on January 1st (among other things). This adds a more selective COPYRIGHTYEAR check which intends to only cover the currently hacked on changeset. The check for updated copyright year is currently not enforced on all files but only on files edited and/or committed locally. This is due to the amount of files which aren't updated with their correct copyright year at the time of their respective commit. To further avoid running this expensive check for every developer, it adds a new local override mode for checksrc where a .checksrc file can be used to turn on extended warnings locally. Closes #3303 Reviewed-by: Daniel Stenberg <daniel@haxx.se>
757 lines
24 KiB
Perl
Executable File
757 lines
24 KiB
Perl
Executable File
#!/usr/bin/env perl
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#***************************************************************************
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# _ _ ____ _
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# Project ___| | | | _ \| |
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# / __| | | | |_) | |
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# | (__| |_| | _ <| |___
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# \___|\___/|_| \_\_____|
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#
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# Copyright (C) 2011 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
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#
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# This software is licensed as described in the file COPYING, which
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# you should have received as part of this distribution. The terms
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# are also available at https://curl.haxx.se/docs/copyright.html.
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#
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# You may opt to use, copy, modify, merge, publish, distribute and/or sell
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# copies of the Software, and permit persons to whom the Software is
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# furnished to do so, under the terms of the COPYING file.
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#
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# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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# KIND, either express or implied.
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#
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###########################################################################
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use strict;
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use warnings;
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my $max_column = 79;
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my $indent = 2;
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my $warnings = 0;
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my $swarnings = 0;
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my $errors = 0;
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my $serrors = 0;
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my $suppressed; # whitelisted problems
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my $file;
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my $dir=".";
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my $wlist="";
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my @alist;
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my $windows_os = $^O eq 'MSWin32' || $^O eq 'msys' || $^O eq 'cygwin';
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my $verbose;
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my %whitelist;
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my %ignore;
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my %ignore_set;
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my %ignore_used;
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my @ignore_line;
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my %warnings_extended = (
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'COPYRIGHTYEAR' => 'copyright year incorrect',
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);
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my %warnings = (
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'LONGLINE' => "Line longer than $max_column",
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'TABS' => 'TAB characters not allowed',
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'TRAILINGSPACE' => 'Trailing white space on the line',
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'CPPCOMMENTS' => '// comment detected',
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'SPACEBEFOREPAREN' => 'space before an open parenthesis',
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'SPACEAFTERPAREN' => 'space after open parenthesis',
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'SPACEBEFORECLOSE' => 'space before a close parenthesis',
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'SPACEBEFORECOMMA' => 'space before a comma',
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'RETURNNOSPACE' => 'return without space',
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'COMMANOSPACE' => 'comma without following space',
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'BRACEELSE' => '} else on the same line',
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'PARENBRACE' => '){ without sufficient space',
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'SPACESEMICOLON' => 'space before semicolon',
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'BANNEDFUNC' => 'a banned function was used',
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'FOPENMODE' => 'fopen needs a macro for the mode string',
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'BRACEPOS' => 'wrong position for an open brace',
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'INDENTATION' => 'wrong start column for code',
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'COPYRIGHT' => 'file missing a copyright statement',
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'BADCOMMAND' => 'bad !checksrc! instruction',
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'UNUSEDIGNORE' => 'a warning ignore was not used',
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'OPENCOMMENT' => 'file ended with a /* comment still "open"',
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'ASTERISKSPACE' => 'pointer declared with space after asterisk',
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'ASTERISKNOSPACE' => 'pointer declared without space before asterisk',
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'ASSIGNWITHINCONDITION' => 'assignment within conditional expression',
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'EQUALSNOSPACE' => 'equals sign without following space',
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'NOSPACEEQUALS' => 'equals sign without preceding space',
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'SEMINOSPACE' => 'semicolon without following space',
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'MULTISPACE' => 'multiple spaces used when not suitable',
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'SIZEOFNOPAREN' => 'use of sizeof without parentheses',
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'SNPRINTF' => 'use of snprintf',
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);
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sub readwhitelist {
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open(W, "<$dir/checksrc.whitelist") or return;
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my @all=<W>;
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for(@all) {
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$windows_os ? $_ =~ s/\r?\n$// : chomp;
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$whitelist{$_}=1;
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}
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close(W);
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}
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# Reads the .checksrc in $dir for any extended warnings to enable locally.
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# Currently there is no support for disabling warnings from the standard set,
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# and since that's already handled via !checksrc! commands there is probably
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# little use to add it.
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sub readlocalfile {
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my $i = 0;
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open(my $rcfile, "<", "$dir/.checksrc") or return;
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while(<$rcfile>) {
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$i++;
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# Lines starting with '#' are considered comments
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if (/^\s*(#.*)/) {
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next;
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}
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elsif (/^\s*enable ([A-Z]+)$/) {
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if(!defined($warnings_extended{$1})) {
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print STDERR "invalid warning specified in .checksrc: \"$1\"\n";
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next;
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}
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$warnings{$1} = $warnings_extended{$1};
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}
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else {
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die "Invalid format in $dir/.checksrc on line $i\n";
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}
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}
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}
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sub checkwarn {
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my ($name, $num, $col, $file, $line, $msg, $error) = @_;
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my $w=$error?"error":"warning";
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my $nowarn=0;
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#if(!$warnings{$name}) {
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# print STDERR "Dev! there's no description for $name!\n";
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#}
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# checksrc.whitelist
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if($whitelist{$line}) {
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$nowarn = 1;
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}
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# !checksrc! controlled
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elsif($ignore{$name}) {
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$ignore{$name}--;
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$ignore_used{$name}++;
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$nowarn = 1;
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if(!$ignore{$name}) {
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# reached zero, enable again
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enable_warn($name, $num, $file, $line);
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}
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}
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if($nowarn) {
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$suppressed++;
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if($w) {
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$swarnings++;
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}
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else {
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$serrors++;
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}
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return;
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}
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if($w) {
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$warnings++;
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}
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else {
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$errors++;
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}
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$col++;
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print "$file:$num:$col: $w: $msg ($name)\n";
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print " $line\n";
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if($col < 80) {
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my $pref = (' ' x $col);
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print "${pref}^\n";
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}
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}
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$file = shift @ARGV;
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while(1) {
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if($file =~ /-D(.*)/) {
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$dir = $1;
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$file = shift @ARGV;
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next;
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}
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elsif($file =~ /-W(.*)/) {
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$wlist .= " $1 ";
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$file = shift @ARGV;
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next;
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}
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elsif($file =~ /-A(.+)/) {
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push @alist, $1;
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$file = shift @ARGV;
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next;
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}
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elsif($file =~ /-i([1-9])/) {
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$indent = $1 + 0;
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$file = shift @ARGV;
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next;
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}
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elsif($file =~ /-m([0-9]+)/) {
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$max_column = $1 + 0;
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$file = shift @ARGV;
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next;
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}
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elsif($file =~ /^(-h|--help)/) {
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undef $file;
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last;
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}
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last;
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}
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if(!$file) {
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print "checksrc.pl [option] <file1> [file2] ...\n";
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print " Options:\n";
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print " -A[rule] Accept this violation, can be used multiple times\n";
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print " -D[DIR] Directory to prepend file names\n";
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print " -h Show help output\n";
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print " -W[file] Whitelist the given file - ignore all its flaws\n";
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print " -i<n> Indent spaces. Default: 2\n";
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print " -m<n> Maximum line length. Default: 79\n";
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print "\nDetects and warns for these problems:\n";
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for(sort keys %warnings) {
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printf (" %-18s: %s\n", $_, $warnings{$_});
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}
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exit;
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}
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readwhitelist();
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readlocalfile();
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do {
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if("$wlist" !~ / $file /) {
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my $fullname = $file;
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$fullname = "$dir/$file" if ($fullname !~ '^\.?\.?/');
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scanfile($fullname);
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}
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$file = shift @ARGV;
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} while($file);
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sub accept_violations {
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for my $r (@alist) {
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if(!$warnings{$r}) {
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print "'$r' is not a warning to accept!\n";
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exit;
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}
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$ignore{$r}=999999;
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$ignore_used{$r}=0;
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}
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}
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sub checksrc_clear {
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undef %ignore;
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undef %ignore_set;
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undef @ignore_line;
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}
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sub checksrc_endoffile {
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my ($file) = @_;
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for(keys %ignore_set) {
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if($ignore_set{$_} && !$ignore_used{$_}) {
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checkwarn("UNUSEDIGNORE", $ignore_set{$_},
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length($_)+11, $file,
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$ignore_line[$ignore_set{$_}],
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"Unused ignore: $_");
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}
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}
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}
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sub enable_warn {
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my ($what, $line, $file, $l) = @_;
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# switch it back on, but warn if not triggered!
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if(!$ignore_used{$what}) {
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checkwarn("UNUSEDIGNORE",
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$line, length($what) + 11, $file, $l,
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"No warning was inhibited!");
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}
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$ignore_set{$what}=0;
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$ignore_used{$what}=0;
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$ignore{$what}=0;
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}
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sub checksrc {
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my ($cmd, $line, $file, $l) = @_;
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if($cmd =~ / *([^ ]*) *(.*)/) {
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my ($enable, $what) = ($1, $2);
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$what =~ s: *\*/$::; # cut off end of C comment
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# print "ENABLE $enable WHAT $what\n";
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if($enable eq "disable") {
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my ($warn, $scope)=($1, $2);
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if($what =~ /([^ ]*) +(.*)/) {
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($warn, $scope)=($1, $2);
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}
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else {
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$warn = $what;
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$scope = 1;
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}
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# print "IGNORE $warn for SCOPE $scope\n";
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if($scope eq "all") {
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$scope=999999;
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}
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# Comparing for a literal zero rather than the scalar value zero
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# covers the case where $scope contains the ending '*' from the
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# comment. If we use a scalar comparison (==) we induce warnings
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# on non-scalar contents.
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if($scope eq "0") {
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checkwarn("BADCOMMAND",
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$line, 0, $file, $l,
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"Disable zero not supported, did you mean to enable?");
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}
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elsif($ignore_set{$warn}) {
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checkwarn("BADCOMMAND",
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$line, 0, $file, $l,
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"$warn already disabled from line $ignore_set{$warn}");
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}
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else {
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$ignore{$warn}=$scope;
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$ignore_set{$warn}=$line;
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$ignore_line[$line]=$l;
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}
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}
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elsif($enable eq "enable") {
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enable_warn($what, $line, $file, $l);
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}
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else {
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checkwarn("BADCOMMAND",
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$line, 0, $file, $l,
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"Illegal !checksrc! command");
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}
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}
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}
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sub nostrings {
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my ($str) = @_;
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$str =~ s/\".*\"//g;
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return $str;
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}
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sub scanfile {
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my ($file) = @_;
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my $line = 1;
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my $prevl="";
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my $l;
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open(R, "<$file") || die "failed to open $file";
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my $incomment=0;
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my @copyright=();
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checksrc_clear(); # for file based ignores
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accept_violations();
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while(<R>) {
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$windows_os ? $_ =~ s/\r?\n$// : chomp;
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my $l = $_;
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my $ol = $l; # keep the unmodified line for error reporting
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my $column = 0;
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# check for !checksrc! commands
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if($l =~ /\!checksrc\! (.*)/) {
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my $cmd = $1;
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checksrc($cmd, $line, $file, $l)
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}
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# check for a copyright statement and save the years
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if($l =~ /\* +copyright .* \d\d\d\d/i) {
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while($l =~ /([\d]{4})/g) {
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push @copyright, {
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year => $1,
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line => $line,
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col => index($l, $1),
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code => $l
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};
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}
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}
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# detect long lines
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if(length($l) > $max_column) {
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checkwarn("LONGLINE", $line, length($l), $file, $l,
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"Longer than $max_column columns");
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}
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# detect TAB characters
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if($l =~ /^(.*)\t/) {
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checkwarn("TABS",
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$line, length($1), $file, $l, "Contains TAB character", 1);
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}
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# detect trailing white space
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if($l =~ /^(.*)[ \t]+\z/) {
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checkwarn("TRAILINGSPACE",
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$line, length($1), $file, $l, "Trailing whitespace");
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}
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# ------------------------------------------------------------
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# Above this marker, the checks were done on lines *including*
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# comments
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# ------------------------------------------------------------
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# strip off C89 comments
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comment:
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if(!$incomment) {
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if($l =~ s/\/\*.*\*\// /g) {
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# full /* comments */ were removed!
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}
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if($l =~ s/\/\*.*//) {
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# start of /* comment was removed
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$incomment = 1;
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}
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}
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else {
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if($l =~ s/.*\*\///) {
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# end of comment */ was removed
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$incomment = 0;
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goto comment;
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}
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else {
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# still within a comment
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$l="";
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}
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}
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# ------------------------------------------------------------
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# Below this marker, the checks were done on lines *without*
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# comments
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# ------------------------------------------------------------
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# crude attempt to detect // comments without too many false
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# positives
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if($l =~ /^([^"\*]*)[^:"]\/\//) {
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checkwarn("CPPCOMMENTS",
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$line, length($1), $file, $l, "\/\/ comment");
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}
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my $nostr = nostrings($l);
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# check spaces after for/if/while/function call
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if($nostr =~ /^(.*)(for|if|while| ([a-zA-Z0-9_]+)) \((.)/) {
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if($1 =~ / *\#/) {
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# this is a #if, treat it differently
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}
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elsif(defined $3 && $3 eq "return") {
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# return must have a space
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}
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elsif(defined $3 && $3 eq "case") {
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# case must have a space
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}
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elsif($4 eq "*") {
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# (* beginning makes the space OK!
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}
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elsif($1 =~ / *typedef/) {
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# typedefs can use space-paren
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}
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else {
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checkwarn("SPACEBEFOREPAREN", $line, length($1)+length($2), $file, $l,
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"$2 with space");
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}
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}
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if($nostr =~ /^((.*)(if) *\()(.*)\)/) {
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my $pos = length($1);
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if($4 =~ / = /) {
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checkwarn("ASSIGNWITHINCONDITION",
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$line, $pos+1, $file, $l,
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"assignment within conditional expression");
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}
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}
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# check spaces after open parentheses
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if($l =~ /^(.*[a-z])\( /i) {
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checkwarn("SPACEAFTERPAREN",
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$line, length($1)+1, $file, $l,
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"space after open parenthesis");
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}
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# check spaces before close parentheses, unless it was a space or a
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# close parenthesis!
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if($l =~ /(.*[^\) ]) \)/) {
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checkwarn("SPACEBEFORECLOSE",
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$line, length($1)+1, $file, $l,
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"space before close parenthesis");
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}
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# check spaces before comma!
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if($l =~ /(.*[^ ]) ,/) {
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checkwarn("SPACEBEFORECOMMA",
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$line, length($1)+1, $file, $l,
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"space before comma");
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}
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# check for "return(" without space
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if($l =~ /^(.*)return\(/) {
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if($1 =~ / *\#/) {
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# this is a #if, treat it differently
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}
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else {
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checkwarn("RETURNNOSPACE", $line, length($1)+6, $file, $l,
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"return without space before paren");
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}
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}
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# check for "sizeof" without parenthesis
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if(($l =~ /^(.*)sizeof *([ (])/) && ($2 ne "(")) {
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if($1 =~ / *\#/) {
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# this is a #if, treat it differently
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}
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else {
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checkwarn("SIZEOFNOPAREN", $line, length($1)+6, $file, $l,
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"sizeof without parenthesis");
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}
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}
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# check for comma without space
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if($l =~ /^(.*),[^ \n]/) {
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my $pref=$1;
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my $ign=0;
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if($pref =~ / *\#/) {
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# this is a #if, treat it differently
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$ign=1;
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}
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elsif($pref =~ /\/\*/) {
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# this is a comment
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$ign=1;
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}
|
|
elsif($pref =~ /[\"\']/) {
|
|
$ign = 1;
|
|
# There is a quote here, figure out whether the comma is
|
|
# within a string or '' or not.
|
|
if($pref =~ /\"/) {
|
|
# within a string
|
|
}
|
|
elsif($pref =~ /\'$/) {
|
|
# a single letter
|
|
}
|
|
else {
|
|
$ign = 0;
|
|
}
|
|
}
|
|
if(!$ign) {
|
|
checkwarn("COMMANOSPACE", $line, length($pref)+1, $file, $l,
|
|
"comma without following space");
|
|
}
|
|
}
|
|
|
|
# check for "} else"
|
|
if($l =~ /^(.*)\} *else/) {
|
|
checkwarn("BRACEELSE",
|
|
$line, length($1), $file, $l, "else after closing brace on same line");
|
|
}
|
|
# check for "){"
|
|
if($l =~ /^(.*)\)\{/) {
|
|
checkwarn("PARENBRACE",
|
|
$line, length($1)+1, $file, $l, "missing space after close paren");
|
|
}
|
|
|
|
# check for space before the semicolon last in a line
|
|
if($l =~ /^(.*[^ ].*) ;$/) {
|
|
checkwarn("SPACESEMICOLON",
|
|
$line, length($1), $file, $ol, "space before last semicolon");
|
|
}
|
|
|
|
# scan for use of banned functions
|
|
if($l =~ /^(.*\W)
|
|
(gets|
|
|
strtok|
|
|
v?sprintf|
|
|
(str|_mbs|_tcs|_wcs)n?cat|
|
|
LoadLibrary(Ex)?(A|W)?)
|
|
\s*\(
|
|
/x) {
|
|
checkwarn("BANNEDFUNC",
|
|
$line, length($1), $file, $ol,
|
|
"use of $2 is banned");
|
|
}
|
|
|
|
# scan for use of snprintf for curl-internals reasons
|
|
if($l =~ /^(.*\W)(v?snprintf)\s*\(/x) {
|
|
checkwarn("SNPRINTF",
|
|
$line, length($1), $file, $ol,
|
|
"use of $2 is banned");
|
|
}
|
|
|
|
# scan for use of non-binary fopen without the macro
|
|
if($l =~ /^(.*\W)fopen\s*\([^,]*, *\"([^"]*)/) {
|
|
my $mode = $2;
|
|
if($mode !~ /b/) {
|
|
checkwarn("FOPENMODE",
|
|
$line, length($1), $file, $ol,
|
|
"use of non-binary fopen without FOPEN_* macro: $mode");
|
|
}
|
|
}
|
|
|
|
# check for open brace first on line but not first column
|
|
# only alert if previous line ended with a close paren and wasn't a cpp
|
|
# line
|
|
if((($prevl =~ /\)\z/) && ($prevl !~ /^ *#/)) && ($l =~ /^( +)\{/)) {
|
|
checkwarn("BRACEPOS",
|
|
$line, length($1), $file, $ol, "badly placed open brace");
|
|
}
|
|
|
|
# if the previous line starts with if/while/for AND ends with an open
|
|
# brace, or an else statement, check that this line is indented $indent
|
|
# more steps, if not a cpp line
|
|
if($prevl =~ /^( *)((if|while|for)\(.*\{|else)\z/) {
|
|
my $first = length($1);
|
|
|
|
# this line has some character besides spaces
|
|
if(($l !~ /^ *#/) && ($l =~ /^( *)[^ ]/)) {
|
|
my $second = length($1);
|
|
my $expect = $first+$indent;
|
|
if($expect != $second) {
|
|
my $diff = $second - $first;
|
|
checkwarn("INDENTATION", $line, length($1), $file, $ol,
|
|
"not indented $indent steps (uses $diff)");
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
# check for 'char * name'
|
|
if(($l =~ /(^.*(char|int|long|void|curl_slist|CURL|CURLM|CURLMsg|curl_httppost) *(\*+)) (\w+)/) && ($4 ne "const")) {
|
|
checkwarn("ASTERISKNOSPACE",
|
|
$line, length($1), $file, $ol,
|
|
"no space after declarative asterisk");
|
|
}
|
|
# check for 'char*'
|
|
if(($l =~ /(^.*(char|int|long|void|curl_slist|CURL|CURLM|CURLMsg|curl_httppost|sockaddr_in|FILE)\*)/)) {
|
|
checkwarn("ASTERISKNOSPACE",
|
|
$line, length($1)-1, $file, $ol,
|
|
"no space before asterisk");
|
|
}
|
|
|
|
# check for 'void func() {', but avoid false positives by requiring
|
|
# both an open and closed parentheses before the open brace
|
|
if($l =~ /^((\w).*)\{\z/) {
|
|
my $k = $1;
|
|
$k =~ s/const *//;
|
|
$k =~ s/static *//;
|
|
if($k =~ /\(.*\)/) {
|
|
checkwarn("BRACEPOS",
|
|
$line, length($l)-1, $file, $ol,
|
|
"wrongly placed open brace");
|
|
}
|
|
}
|
|
|
|
# check for equals sign without spaces next to it
|
|
if($nostr =~ /(.*)\=[a-z0-9]/i) {
|
|
checkwarn("EQUALSNOSPACE",
|
|
$line, length($1)+1, $file, $ol,
|
|
"no space after equals sign");
|
|
}
|
|
# check for equals sign without spaces before it
|
|
elsif($nostr =~ /(.*)[a-z0-9]\=/i) {
|
|
checkwarn("NOSPACEEQUALS",
|
|
$line, length($1)+1, $file, $ol,
|
|
"no space before equals sign");
|
|
}
|
|
|
|
# check for plus signs without spaces next to it
|
|
if($nostr =~ /(.*)[^+]\+[a-z0-9]/i) {
|
|
checkwarn("PLUSNOSPACE",
|
|
$line, length($1)+1, $file, $ol,
|
|
"no space after plus sign");
|
|
}
|
|
# check for plus sign without spaces before it
|
|
elsif($nostr =~ /(.*)[a-z0-9]\+[^+]/i) {
|
|
checkwarn("NOSPACEPLUS",
|
|
$line, length($1)+1, $file, $ol,
|
|
"no space before plus sign");
|
|
}
|
|
|
|
# check for semicolons without space next to it
|
|
if($nostr =~ /(.*)\;[a-z0-9]/i) {
|
|
checkwarn("SEMINOSPACE",
|
|
$line, length($1)+1, $file, $ol,
|
|
"no space after semicolon");
|
|
}
|
|
|
|
# check for more than one consecutive space before open brace or
|
|
# question mark. Skip lines containing strings since they make it hard
|
|
# due to artificially getting multiple spaces
|
|
if(($l eq $nostr) &&
|
|
$nostr =~ /^(.*(\S)) + [{?]/i) {
|
|
checkwarn("MULTISPACE",
|
|
$line, length($1)+1, $file, $ol,
|
|
"multiple space");
|
|
print STDERR "L: $l\n";
|
|
print STDERR "nostr: $nostr\n";
|
|
}
|
|
|
|
$line++;
|
|
$prevl = $ol;
|
|
}
|
|
|
|
if(!scalar(@copyright)) {
|
|
checkwarn("COPYRIGHT", 1, 0, $file, "", "Missing copyright statement", 1);
|
|
}
|
|
|
|
# COPYRIGHTYEAR is a extended warning so we must first see if it has been
|
|
# enabled in .checksrc
|
|
if(defined($warnings{"COPYRIGHTYEAR"})) {
|
|
# The check for updated copyrightyear is overly complicated in order to
|
|
# not punish current hacking for past sins. The copyright years are
|
|
# right now a bit behind, so enforcing copyright year checking on all
|
|
# files would cause hundreds of errors. Instead we only look at files
|
|
# which are tracked in the Git repo and edited in the workdir, or
|
|
# committed locally on the branch without being in upstream master.
|
|
#
|
|
# The simple and naive test is to simply check for the current year,
|
|
# but updating the year even without an edit is against project policy
|
|
# (and it would fail every file on January 1st).
|
|
#
|
|
# A rather more interesting, and correct, check would be to not test
|
|
# only locally committed files but inspect all files wrt the year of
|
|
# their last commit. Removing the `git rev-list origin/master..HEAD`
|
|
# condition below will enfore copyright year checks against the year
|
|
# the file was last committed (and thus edited to some degree).
|
|
my $commityear = undef;
|
|
@copyright = sort {$$b{year} cmp $$a{year}} @copyright;
|
|
|
|
if(`git status -s -- $file` =~ /^ [MARCU]/) {
|
|
$commityear = (localtime(time))[5] + 1900;
|
|
}
|
|
elsif (`git rev-list --count origin/master..HEAD -- $file` !~ /^0/) {
|
|
my $grl = `git rev-list --max-count=1 --timestamp HEAD -- $file`;
|
|
$commityear = (localtime((split(/ /, $grl))[0]))[5] + 1900;
|
|
}
|
|
|
|
if(defined($commityear) && scalar(@copyright) &&
|
|
$copyright[0]{year} != $commityear) {
|
|
checkwarn("COPYRIGHTYEAR", $copyright[0]{line}, $copyright[0]{col},
|
|
$file, $copyright[0]{code},
|
|
"Copyright year out of date, should be $commityear, " .
|
|
"is $copyright[0]{year}", 1);
|
|
}
|
|
}
|
|
|
|
if($incomment) {
|
|
checkwarn("OPENCOMMENT", 1, 0, $file, "", "Missing closing comment", 1);
|
|
}
|
|
|
|
checksrc_endoffile($file);
|
|
|
|
close(R);
|
|
|
|
}
|
|
|
|
|
|
if($errors || $warnings || $verbose) {
|
|
printf "checksrc: %d errors and %d warnings\n", $errors, $warnings;
|
|
if($suppressed) {
|
|
printf "checksrc: %d errors and %d warnings suppressed\n",
|
|
$serrors,
|
|
$swarnings;
|
|
}
|
|
exit 5; # return failure
|
|
}
|