#!/usr/bin/env perl
# $Id: makeppinfo,v 1.23 2013/05/09 08:41:11 pfeiffer Exp $

package Mpp;

use strict;

use POSIX ();

#
# Exiting
#
# Do this early, because the END block defined below shall be the first seen
# by perl, such that it is the last executed.  It leaves the process via
# POSIX::_exit, so that no expensive garbage collection of Mpp::File objects
# occurs.  All other places can use die or normal exit.  If you define
# additional END blocks in any module, you must take care to not reset $?.
#
END {
  close STDOUT; close STDERR;
  POSIX::_exit $?;
}

our $datadir;
BEGIN {
#@@setdatadir
#
# Find the location of our data directory that contains the auxiliary files.
# This is normally built into the program by install.pl, but if makepp hasn't
# been installed, then we look in the directory we were run from.
#
  $datadir = $0;		# Assume it's running from the same place that
				# we're running from.
  unless ($datadir =~ s@/[^/]+$@@) { # No path specified?
				# See if we can find ourselves in the path.
    foreach (split(/:/, $ENV{'PATH'}), '.') {
				# Add '.' to the path in case the user is
				# running it with "perl makeppclean" even if
				# . is not in his path.
      if( -d "$_/Mpp" ) {	# Found something we need?
	$datadir = $_;
	last;
      }
    }
  }
  $datadir or die "makepp: can't find library files\n";

  $datadir = eval "use Cwd; cwd . '/$datadir'"
    if $datadir =~ /^\./;	# Make it absolute, if it's a relative path.
  do "$datadir/Mpp/DB.pm" if exists $DB::{sh};
#@@
  unshift @INC, $datadir;
}

use Mpp::Utils;
use Mpp::File;
use Mpp::FileOpt;

my( $decode_date, $force, $keylist, $quiet, $traverse, $unremembered, @keys_not, @keys );
Mpp::Text::getopts
  ['d', qr/(?:decode[-_]?)?dates?/, \$decode_date],

  [qw'f force', \$force],

  ['k', qr/key(?:s|list)/, \$keylist, 1],

  [qw'q quiet', \$quiet],

  [qw't traverse', \$traverse],

  [qw'u unremembered', \$unremembered],

  splice @Mpp::Text::common_opts;

$traverse = 2 if $unremembered;

$SIG{__WARN__} = sub {} if $quiet && $quiet > 1;

for( $keylist ) {
  last if !defined;
  tr/a-z/A-Z/;
  s/(?=[?*])/./g;
  if( s/\{/(?:/g ) {
    tr/,}/|)/ or die "makeppinfo: error: -k, --keylist contained '{', but no ',' or '}'\n";
  } else {
    /,/ and die "makeppinfo: error: -k, --keylist contained ',', but no '{...}'\n";
  }
}

my @seen_dirs;
sub merge($@) {
  my( $build_info, $key1, $key2 ) = @_;
  if( exists $build_info->{$key1} && exists $build_info->{$key2} ) {
    my @list1 = split /\cA/, delete $build_info->{$key1};
    my @list2 = split /\cA/, delete $build_info->{$key2};
    $build_info->{"$key1 $key2"} = join "\n", '',
      map sprintf( $decode_date ? "%-44s %s" : "%-22s %s", $_, shift @list2 ), @list1;
  }
}

my $sep = '';
@ARGV = '.' unless @ARGV;
while( @ARGV ) {
  my $finfo = shift;
  if( ref $finfo ) {		# This means we looped around to found deps
    undef $traverse if $traverse && $traverse == 1;
  } else {
    $finfo = file_info $finfo;
  }
  next if exists $finfo->{xSEEN};
  undef $finfo->{xSEEN};
  my $exists = file_exists $finfo;
  unless( $exists ) {
    warn 'makeppinfo: file `' . relative_filename( $finfo ) . "' not found\n";
    next unless $force;
  }
  if( is_dir $finfo ) {
    unshift @ARGV, grep -f, glob relative_filename( $finfo ) . '/*';
    next;
  }

  my $build_info = Mpp::File::load_build_info_file $finfo;
  unless( $build_info ) {
    if( $force ) {
      $build_info->{unremembered_SIGNATURE} = Mpp::File::signature $finfo;
    } else {
      warn 'makeppinfo: file `' . relative_filename( $finfo ) . "' not remembered by mpp\n"
	unless $quiet;
      next;
    }
  }
  unless( $force || $build_info->{SIGNATURE} || $build_info->{unremembered_SIGNATURE} ) {
    warn 'makeppinfo: file `' . relative_filename( $finfo ) . "' modified outside of mpp\n"
      if $exists;
    next;
  }

  if( $traverse ) {
    my $finfodir = exists $finfo->{DIRCONTENTS} ? $finfo : $finfo->{'..'};
    my $cwd = file_info $build_info->{CWD}, $finfodir
      if exists $build_info->{CWD};

    my $length = @ARGV;		# When not traversing we throw these away again:
    push @ARGV, map file_info( $_, $cwd ), split /\cA/, $build_info->{SORTED_DEPS}
      if $cwd && $build_info->{SORTED_DEPS};

    if( $unremembered ) {
      push @seen_dirs, grep { exists $_->{xPUSHED} ? 0 : !undef $_->{xPUSHED} }
	@ARGV[$length..$#ARGV], $finfodir, $cwd ? $cwd : ();
      next;
    }
  }

  if( $keylist ) {
    my %want;
    for my $re ( split ' ', $keylist ) {
      if( $re =~ s/^[!^]// ) {
	@want{keys %$build_info} = () if !%want;
	delete @want{grep /^$re$/, keys %want};
      } else {
	@want{grep /^$re$/, keys %$build_info} = ();
      }
    }
    delete @{$build_info}{grep !exists $want{$_}, keys %$build_info};
  }

  merge $build_info, qw(DEP_SIGS SORTED_DEPS);
  merge $build_info, qw(ENV_DEPS ENV_VALS);

  print $sep . relative_filename( $finfo ) . ":\n" unless $quiet;
  $sep ||= "\n";
  for my $key ( sort keys %$build_info ) {
    # Check names explicitly, because there may be no ^B, making it look like a 1 level list:
    if( $key =~ /^(?:IMPLICIT_DEPS|INCLUDE_(?:PATHS|SFXS)|META_DEPS)$/ || $build_info->{$key} =~ /\cB/ ) {
      my @lists = split /\cB/, $build_info->{$key};
      $build_info->{$key} = '';
      for( @lists ) {
	my( $tag, @sublist ) = split /\cA/, $_;
	$build_info->{$key} .= "\n\t$tag\t$_" for @sublist;
      }
    } elsif( $build_info->{$key} =~ /\cA/ ) {
      my @list = split /\cA/, $build_info->{$key};
      $build_info->{$key} = '';
      $build_info->{$key} .= "\n\t$_" for @list;
    } else {
      $build_info->{$key} =~ s/\n/\n\t/g;
      $build_info->{$key} .= ' -- ' .
	($exists ? 'now is ' . Mpp::File::signature( $finfo ) : 'file deleted')
	if $force && $key eq 'invalidated_SIGNATURE';
    }
    if( $decode_date ) {
      $build_info->{$key} =~ s((\b(\d{9,}),\d+)(?: {22})?){
	my( $sec, $min, $hour, $mday, $mon, $year ) = localtime $2;
	sprintf "(%d-%02d-%02d %02d:%02d:%02d) %s", $year+1900, $mon+1, $mday, $hour, $min, $sec, $1;
      }eg;
    }
    if( $quiet ) {
      $build_info->{$key} =~ s/\A\n//;
      print "$build_info->{$key}\n";
    } else {
      print "$key=$build_info->{$key}\n";
    }
  }
}

if( @seen_dirs ) {
  my @unremembered;
  for my $dir ( @seen_dirs ) {
    next if $unremembered == 1
      and 999 <= relative_filename $CWD_INFO, $dir, 1;
    Mpp::File::read_directory $dir;
    for my $finfo ( values %{$dir->{DIRCONTENTS}} ) {
      push @unremembered, relative_filename $finfo unless
	exists $finfo->{xSEEN} or is_dir $finfo;
    }
  }

  print "$_\n" for sort { ($a =~ tr:/:: || ~0) <=> ($b =~ tr:/:: || ~0) or $a cmp $b } @unremembered;
}

__DATA__
[option ...] [file ...]

For each file print a human readable version of makepp's build info.  DEP_SIGS
and SORTED_DEPS get merged, as do ENV_DEPS and ENV_VALS.  Tagged lists have the
tag prepended.  Valid options are: