#!/usr/bin/perl -w

=head1 NAME

dh_install - install files into package build directories

=cut

use strict;
use File::Find;
use Debian::Debhelper::Dh_Lib;

=head1 SYNOPSIS

B<dh_install> [B<-X>I<item>] [B<--autodest>] [B<--sourcedir=>I<dir>] [S<I<debhelper options>>] [S<I<file [...] dest>>]

=head1 DESCRIPTION

dh_install is a debhelper program that handles installing files into package
build directories. There are many dh_install* commands that handle installing
specific types of files such as documentation, examples, man pages, and so on,
and they should be used when possible as they often have extra intelligence for
those particular tasks. dh_install, then, is useful for installing everything
else, for which no particular intelligence is needed. It is a replacement for
the old dh_movefiles command.

Files named debian/package.install list the files to install into each
package and the directory they should be installed to. The format is a set
of lines, where each line lists a file or files to install, and at the end
of the line tells the directory it should be installed in. The name of the
files (or directories) to install should be given relative to the current
directory, while the installation directory is given relative to the
package build directory. You may use wildcards in the names of the files to
install (in v3 mode and above).

This program may be used in one of two ways. If you just have a file or two
that the upstream Makefile does not install for you, you can run dh_install
on them to move them into place. On the other hand, maybe you have a large
package that builds multiple binary packages. You can use the upstream
Makefile to install it all into debian/tmp, and then use dh_install to copy
directories and files from there into the proper package build directories.

From debhelper compatibility level 7 on, dh_install will fall back to
looking in debian/tmp for files, if it doesn't find them in the current
directory (or whereever you've told it to look using --srcdir).

=head1 OPTIONS

=over 4

=item B<-Xitem>, B<--exclude=item>

Exclude files that contain "item" anywhere in their filename from
being installed.

=item B<--autodest>

Guess as the destination directory to install things to. If this is
specified, you should not list destination directories in
debian/package.install files or on the command line. Instead, dh_install
will guess as follows:

Strip off debian/tmp (or the sourcedir if one is given) from the front of
the filename, if it is present, and install into the dirname of the
filename. So if the filename is debian/tmp/usr/bin, then that directory
will be copied to debian/package/usr/. If the filename is
debian/tmp/etc/passwd, it will be copied to debian/package/etc/.

Note that if you list exactly one filename or wildcard-pattern on a line by
itself in a
debian/package.install file, with no explicit destination, then dh_install
will automatically guess the destination even if this flag is not set.

=item B<--list-missing>

This option makes dh_install keep track of the files it installs, and then at
the end, compare that list with the files in the source directory. If any of
the files (and symlinks) in the source directory were not installed to
somewhere, it will warn on stderr about that.

This may be useful if you have a large package and want to make sure that
you don't miss installing newly added files in new upstream releases.

Note that files that are excluded from being moved via the -X option are not
warned about.

=item B<--fail-missing>

This option is like --list-missing, except if a file was missed, it will
not only list the missing files, but also fail with a nonzero exit code. 

=item B<--sourcedir=dir>

Makes all source files be found under dir. If this is specified, it is
akin to all the source filenames having "dir/" prepended to them.

To make dh_install behave like the old dh_movefiles, move your
package.files file to package.install and call dh_install with
"--sourcedir=debian/tmp" appended to the command. This will
approximate dh_movefiles behaviour, except it will copy files instead
of moving them.

=item I<file [...] dest>

Lists files (or directories) to install and where to install them to.
The files will be installed into the first package dh_install acts on.

=back

=cut

init();

my @installed;

my $srcdir = '.';
$srcdir = $dh{SOURCEDIR}."/" if defined $dh{SOURCEDIR};

foreach my $package (@{$dh{DOPACKAGES}}) {
	my $tmp=tmpdir($package);
	my $file=pkgfile($package,"install");

	my @install;
	if ($file) {
		@install=filedoublearray($file); # no globbing yet
	}
	
	if (($package eq $dh{FIRSTPACKAGE} || $dh{PARAMS_ALL}) && @ARGV) {
		push @install, [@ARGV];
	}

	# Support for -X flag.
	my $exclude = '';
	if ($dh{EXCLUDE_FIND}) {
		$exclude = '! \( '.$dh{EXCLUDE_FIND}.' \)';
	}
	
	foreach my $set (@install) {
		my $dest;
		my $tmpdest=0;
		
		if (! defined $dh{AUTODEST} && @$set > 1) {
			$dest=pop @$set;
		}

		my @filelist;
		foreach my $glob (@$set) {
			my @found = glob "$srcdir/$glob";
			if (! compat(6)) {
				# Fall back to looking in debian/tmp.
				if (! @found || ! -e $found[0]) {
					@found = glob "debian/tmp/$glob";
				}
			}
			push @filelist, @found;
		}

		if (! compat(4)) { # check added in v5
			# glob now, relative to srcdir
			if (! @filelist) {
				error("$package missing files (@$set), aborting");
			}
		}
		foreach my $src (@filelist) { 
			next if excludefile($src);
		
			if (! defined $dest) {
				# Guess at destination directory.
				$dest=$src;
				my $strip=$srcdir;
				if ($strip eq '.') {
					$strip = "debian/tmp";
				}
				$dest=~s/^(.*\/)?\Q$strip\E//;
				$dest=dirname($dest);
				$tmpdest=1;
			}
			
			# Make sure the destination directory exists.
			if (! -e "$tmp/$dest") {
				doit("install","-d","$tmp/$dest");
			}

			# Keep track of what's installed.
			if ($dh{LIST_MISSING} || $dh{FAIL_MISSING}) {
				# Kill any extra slashes. Makes the
				# @installed stuff more robust.
				$src=~y:/:/:s;
				$src=~s:/+$::;
				$src=~s:^(\./)*::;
				push @installed, "\Q$src\E\/.*|\Q$src\E";
			}
			
			if (-d $src && $exclude) {
				my $basename = basename($src);
				my $dir = ($basename eq '.') ? $src : "$src/..";
				my $pwd=`pwd`;
				chomp $pwd;
				complex_doit("cd '$dir' && find '$basename' $exclude \\( -type f -or -type l \\) -exec cp --parents -dp {} $pwd/$tmp/$dest/ \\;");
				# cp is annoying so I need a separate pass
				# just for empty directories
				complex_doit("cd '$dir' && find '$basename' $exclude \\( -type d -and -empty \\) -exec cp --parents -a {} $pwd/$tmp/$dest/ \\;");
			}
			else {
				doit("cp", "-a", $src, "$tmp/$dest/");
			}

			if ($tmpdest) {
				$dest=undef;
			}
		}
	}
}

if ($dh{LIST_MISSING} || $dh{FAIL_MISSING}) {
	# . as srcdir makes no sense, so this is a special case.
	if ($srcdir eq '.') {
		$srcdir='debian/tmp';
	}
	
	my @missing;
	my $installed=join("|", @installed);
	$installed=qr{^($installed)$};
	find(sub {
		-f || -l || return;
		$_="$File::Find::dir/$_";
		if (! /$installed/ && ! excludefile($_)) {
			my $file=$_;
			$file=~s/^\Q$srcdir\E\///;
			push @missing, $file;
		}
	}, $srcdir);
	if (@missing) {
		warning "$_ exists in $srcdir but is not installed to anywhere" foreach @missing;
		if ($dh{FAIL_MISSING}) {
			error("missing files, aborting");
		}
	}
}

=head1 EXAMPLE

Suppose your package's upstream Makefile installs a binary, a man page, and
a library into appropriate subdirectories of debian/tmp. You want to put
the library into package libfoo, and the rest into package foo. Your rules
file will run "dh_install --sourcedir=debian/tmp". Make debian/foo.install
contain:

  usr/bin
  usr/share/man/man1

While debian/libfoo.install contains:

  usr/lib/libfoo*.so.*

If you want a libfoo-dev package too, debian/libfoo-dev.install might contain:

  usr/include
  usr/lib/libfoo*.so
  usr/share/man/man3

=head1 LIMITATIONS

dh_install cannot rename files or directories, it can only install them
with the names they already have into wherever you want in the package
build tree.
  
=head1 SEE ALSO

L<debhelper(7)>

This program is a part of debhelper.

=head1 AUTHOR

Joey Hess <joeyh@debian.org>

=cut