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#!/usr/bin/perl -w
#
# dplint -- General purpose frontend for Debian package checker
#
# Copyright (C) 2013 Niels Thykier
# - Based on lintian, which is/was:
# Copyright (C) 1998 Christian Schwarz, Richard Braakman (and others)
#
# This program is free software. It is distributed under the terms of
# the GNU General Public License as published by the Free Software
# Foundation; either version 2 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, you can find it on the World Wide
# Web at http://www.gnu.org/copyleft/gpl.html, or write to the Free
# Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
# MA 02110-1301, USA.
no lib '.';
# In main scope, need an unnamed sub to avoid tainting the "main" namespace
# in case we need to run a ".pm" tool.
use strict;
use warnings;
my $TOOL_RUNNER = sub {
my ($tool_pm_path) = @_;
my $main;
eval {require $tool_pm_path;};
if (my $err = $@) {
dplint::error("Could not load ${tool_pm_path}: $err");
}
{
no strict 'refs';
$main = \&{'::main'};
}
if (not defined($main)) {
dplint::error("${tool_pm_path} does not define a main sub");
}
eval {$main->();};
if (my $err = "$@") {
# main threw an exception
$err .= "\n" if ($err !~ m/\n\Z/);
print STDERR $err;
exit(255);
}
exit(0);
};
package dplint;
use strict;
use warnings;
use Cwd qw(getcwd realpath);
use File::Basename qw(dirname basename);
use Getopt::Long();
# The $INIT_ROOT line below is (to be) replaced at install time to the
# actual root (i.e. '/usr/share/lintian'). The find_source_root call
# is simply a placeholder to make the command work out of the box in
# the source tree.
my $INIT_ROOT = q{/usr/share/lintian};
# NB: @INCLUDE_DIRS + @RESTRICTED_INCLUDE_DIRS should /only/ have
# absolute paths. Various bit of lintian code implicitly rely on
# this.
my (@INCLUDE_DIRS, @RESTRICTED_INCLUDE_DIRS);
my $LINTIAN_VERSION = q{2.5.81ubuntu1}; # Substituted during build/install
my %BUILTINS = (
'help' => \&builtin_help,
'version' => \&builtin_version,
'print-version' => \&builtin_version,
);
sub error {
my (@lines) = @_;
print STDERR join("\n", @lines), "\n";
exit(1);
}
sub run_tool {
my ($truename, $tool) = @_;
for my $include_dir (@INCLUDE_DIRS) {
my $tool_path = "$include_dir/commands/${tool}";
my $tool_pm_path = "${tool_path}.pm";
if (-f $tool_path) {
if (!-x $tool_path) {
error("$tool ($tool_path) is present but not executable!");
}
{
# Scope here it to avoid a warning about exec not returning.
exec {$tool_path} $truename, @ARGV;
}
local $" = ' ';
error(
"Running $tool failed!",
" Command: $tool_path @ARGV",
" Error from exec: $!"
);
}
if (-f $tool_pm_path) {
# Re-configure Getopt::Long - to avoid surprises in the tool
Getopt::Long::config('default');
# Update @INC before running the tool
require lib;
lib->import(grep { -d } map { "$_/lib" } @INCLUDE_DIRS);
$0 = $tool;
$TOOL_RUNNER->($tool_pm_path);
error('TOOL_RUNNER returned unexpectedly!?');
}
}
error("$tool is not available");
}
sub setup_env {
my ($user_dirs) = @_;
if ($user_dirs) {
my ($data_home, $legacy_user_data);
load_file_basedir();
if (exists($ENV{'HOME'}) or exists($ENV{'XDG_CONFIG_HOME'})) {
$data_home = data_home('lintian');
}
if (exists($ENV{'HOME'})) {
$legacy_user_data = "$ENV{HOME}/.lintian";
}
if (defined($data_home) and $data_home !~ m@^/@) {
# Turn the path into an absolute one. Just in case
# someone sets a relative HOME dir.
my $cwd = getcwd();
$data_home = "${cwd}/${data_home}";
}
push(@RESTRICTED_INCLUDE_DIRS, $data_home)
if defined($data_home) && -d $data_home;
push(@RESTRICTED_INCLUDE_DIRS, $legacy_user_data)
if defined($legacy_user_data) && -d $legacy_user_data;
push(@RESTRICTED_INCLUDE_DIRS, '/etc/lintian')
if -d '/etc/lintian';
}
push(@INCLUDE_DIRS, $INIT_ROOT);
$ENV{'LINTIAN_ROOT'} = $INIT_ROOT;
$ENV{'LINTIAN_INCLUDE_DIRS'} = join(':', grep { -d } @INCLUDE_DIRS);
$ENV{'LINTIAN_RESTRICTED_INCLUDE_DIRS'}
= join(':', grep { -d } @RESTRICTED_INCLUDE_DIRS);
$ENV{'LINTIAN_ENABLE_USER_DIRS'} = $user_dirs ? 1 : 0;
$ENV{'LINTIAN_HELPER_DIRS'} = join(
':', grep { -d }
map { "$_/helpers" } @INCLUDE_DIRS
);
$ENV{'LINTIAN_DPLINT_CALLED_AS'} = $0;
$ENV{'LINTIAN_DPLINT_FRONTEND'} = realpath($0)
// error("Cannot resolve $0: $!");
if (my $coverage_arg = $ENV{'LINTIAN_COVERAGE'}) {
my $p5opt = $ENV{'PERL5OPT'}//q{};
$p5opt .= ' ' if $p5opt ne q{};
$ENV{'PERL5OPT'} = "${p5opt} ${coverage_arg}";
}
return;
}
sub load_file_basedir {
# File::BaseDir spews warnings if $ENV{'HOME'} is undef, so
# make sure it is defined when we load the module. Though,
# we need to scope this, so $ENV{HOME} becomes undef again
# when we check for it later.
local $ENV{'HOME'} = $ENV{'HOME'} // '/nonexistent';
require File::BaseDir;
File::BaseDir->import(qw(config_home config_files data_home));
return;
}
sub cmd_add_include_dir {
my (undef, $dir) = @_;
my $abs_dir;
error("$dir is not a directory") unless -d $dir;
$abs_dir = realpath($dir) // error("Cannot resolve $dir: $!");
push(@INCLUDE_DIRS, $abs_dir);
return;
}
sub find_source_root {
# Determine the $INIT_ROOT in case we are run from the source tree
my $path = realpath(__FILE__) // error("realpath($0) failed: $!\n");
# .../lintian.git/frontend/dplint => .../lintian.git
return dirname(dirname($path));
}
sub include_dirs {
return @INCLUDE_DIRS;
}
sub restricted_include_dirs {
return @RESTRICTED_INCLUDE_DIRS;
}
sub load_profile {
my ($profile_name, $options) = @_;
my %opt = (
'restricted-search-dirs' => \@RESTRICTED_INCLUDE_DIRS,
%{$options // {}},
);
require Lintian::Profile;
return Lintian::Profile->new($profile_name, \@INCLUDE_DIRS, \%opt);
}
sub main {
my $user_dirs = 1;
my %opthash = (
'include-dir=s' => \&cmd_add_include_dir,
'user-dirs!' => $user_dirs,
);
binmode(STDOUT, ':utf8');
# init commandline parser
Getopt::Long::config(
'bundling', 'no_getopt_compat',
'no_auto_abbrev', 'require_order',
'pass_through'
);
# process commandline options
Getopt::Long::GetOptions(%opthash)
or error("error parsing options\n");
setup_env($user_dirs);
my $called_as = basename($0);
my $truename;
my $cmd;
if ($called_as ne 'dplint') {
$truename = $0;
if ($called_as eq 'lintian-ng') {
$cmd = 'check';
} elsif ($called_as eq 'lintian') {
$cmd = 'lintian';
} elsif ($called_as eq 'harness') {
$cmd = 'reporting-harness';
} elsif ($called_as =~ m{\A (?:(?:lintian|dplint)-)? (.+) \Z}xsm) {
$cmd = $1;
} else {
error("Not sure what command $called_as was intended to be");
}
} else {
if (!defined($cmd)) {
$cmd = shift(@ARGV);
}
if (!defined($cmd)) {
$cmd = 'help';
}
if ($cmd =~ m/^-/) {
if ($cmd eq '--help' or $cmd eq '-h') {
$cmd = 'help';
} elsif ($cmd eq '--version' or $cmd eq '--print-version') {
$cmd = substr($cmd, 2);
} else {
error("Unknown option $cmd");
}
$truename //= 'dplint';
}
}
if (exists($BUILTINS{$cmd})) {
my $handler = $BUILTINS{$cmd};
error("Unimplemented built-in $cmd")
unless $handler;
# Re-configure Getopt::Long - builtins do not care about ordering
Getopt::Long::config(
'default', 'permute',
'bundling','no_getopt_compat',
'no_auto_abbrev'
);
$handler->($truename, $cmd);
error("Built-in $cmd returned unexpectedly");
}
$truename //= $cmd;
run_tool($truename, $cmd);
error('run_tool returned unexpectedly');
}
sub lintian_version {
$LINTIAN_VERSION = guess_version(__FILE__)
if not defined($LINTIAN_VERSION);
return $LINTIAN_VERSION;
}
sub builtin_version {
my ($truename, $cmd) = @_;
my $version = lintian_version();
if ($cmd eq 'print-version') {
print "${version}\n";
} else {
print "Lintian v${version}\n";
}
exit(0);
}
sub builtin_help {
my ($truename, $cmd) = @_;
my $me = basename($0);
my $version = lintian_version();
print <<"EOT";
Lintian v${version}
Usage: $me [General options] <command> [options/arguments...]
General options:
--include-dir DIR include checks, libraries (etc.) from DIR
--[no-]user-dirs whether to use files from user directories
EOT
exit 0;
}
sub guess_version {
my $rootdir = find_source_root();
my $guess;
if (-d "$rootdir/.git") {
# Lets try git
eval {
# Disabling IPC::Run::Debug saves tons of useless calls.
$ENV{'IPCRUNDEBUG'} = 'none'
unless exists $ENV{'IPCRUNDEBUG'};
require IPC::Run;
IPC::Run::run(['git', "--git-dir=$rootdir/.git", 'describe'],
\undef, \$guess, '2>/dev/null');
chomp($guess);
};
return $guess if $guess;
}
# git was not possible - maybe the changelog is available
if (-f "$rootdir/debian/changelog") {
require Parse::DebianChangelog;
eval {
my $changelog
= Parse::DebianChangelog->init(
{ infile => "$rootdir/debian/changelog" });
$guess = $changelog->dpkg->{'Version'} if $changelog;
};
return $guess if $guess;
}
# Out of guesses ...
error('Unable to determine the version automatically!?');
}
main();
# Local Variables:
# indent-tabs-mode: nil
# cperl-indent-level: 4
# End:
# vim: syntax=perl sw=4 sts=4 sr et
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