546 lines
14 KiB
Plaintext
546 lines
14 KiB
Plaintext
#!@PERL@
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# GNU Stow - manage the installation of multiple software packages
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# Copyright (C) 1993, 1994, 1995, 1996 by Bob Glickstein
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# Copyright (C) 2000,2001 Guillaume Morin
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#
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# This program 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 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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#
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# $Id$
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# $Source$
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# $Date$
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# $Author$
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require 5.005;
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use POSIX;
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$ProgramName = $0;
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$ProgramName =~ s,.*/,,;
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$Version = '@VERSION@';
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$Conflicts = 0;
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$Delete = 0;
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$NotReally = 0;
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$Verbose = 0;
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$ReportHelp = 0;
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$Stow = undef;
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$Target = undef;
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$Restow = 0;
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# FIXME: use Getopt::Long
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while (@ARGV && ($_ = $ARGV[0]) && /^-/) {
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$opt = $';
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shift;
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last if /^--$/;
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if ($opt =~ /^-/) {
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$opt = $';
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if ($opt =~ /^no?$/i) {
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$NotReally = 1;
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} elsif ($opt =~ /^c(o(n(f(l(i(c(ts?)?)?)?)?)?)?)?$/i) {
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$Conflicts = 1;
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$NotReally = 1;
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} elsif ($opt =~ /^dir?/i) {
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$remainder = $';
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if ($remainder =~ /^=/) {
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$Stow = $'; # the stuff after the =
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} else {
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$Stow = shift;
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}
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} elsif ($opt =~ /^t(a(r(g(et?)?)?)?)?/i) {
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$remainder = $';
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if ($remainder =~ /^=/) {
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$Target = $'; # the stuff after the =
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} else {
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$Target = shift;
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}
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} elsif ($opt =~ /^verb(o(se?)?)?/i) {
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$remainder = $';
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if ($remainder =~ /^=(\d+)/) {
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$Verbose = $1;
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} else {
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++$Verbose;
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}
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} elsif ($opt =~ /^de(l(e(te?)?)?)?$/i) {
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$Delete = 1;
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} elsif ($opt =~ /^r(e(s(t(o(w?)?)?)?)?)?$/i) {
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$Restow = 1;
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} elsif ($opt =~ /^vers(i(on?)?)?$/i) {
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&version();
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} else {
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&usage(($opt =~ /^h(e(lp?)?)?$/) ? undef :
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"unknown or ambiguous option: $opt");
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}
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} else {
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@opts = split(//, $opt);
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while ($_ = shift(@opts)) {
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if ($_ eq 'n') {
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$NotReally = 1;
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} elsif ($_ eq 'c') {
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$Conflicts = 1;
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$NotReally = 1;
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} elsif ($_ eq 'd') {
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$Stow = (join('', @opts) || shift);
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@opts = ();
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} elsif ($_ eq 't') {
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$Target = (join('', @opts) || shift);
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@opts = ();
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} elsif ($_ eq 'v') {
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++$Verbose;
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} elsif ($_ eq 'D') {
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$Delete = 1;
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} elsif ($_ eq 'R') {
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$Restow = 1;
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} elsif ($_ eq 'V') {
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&version();
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} else {
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&usage(($_ eq 'h') ? undef : "unknown option: $_");
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}
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}
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}
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}
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&usage("No packages named") unless @ARGV;
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# Changing dirs helps a lot when soft links are used
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$current_dir = &getcwd;
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if ($Stow) {
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chdir($Stow) || die "Cannot chdir to target tree $Stow ($!)\n";
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}
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# This prevents problems if $Target was supplied as a relative path
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$Stow = &getcwd;
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chdir($current_dir) || die "Your directory does not seem to exist anymore ($!)\n";
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$Target = &parent($Stow) unless $Target;
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chdir($Target) || die "Cannot chdir to target tree $Target ($!)\n";
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$Target = &getcwd;
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foreach $package (@ARGV) {
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$package =~ s,/+$,,; # delete trailing slashes
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if ($package =~ m,/,) {
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die "$ProgramName: slashes not permitted in package names\n";
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}
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}
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if ($Delete || $Restow) {
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@Collections = @ARGV;
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&Unstow('', &RelativePath($Target, $Stow));
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}
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if (!$Delete || $Restow) {
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foreach $Collection (@ARGV) {
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warn "Stowing package $Collection...\n" if $Verbose;
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&StowContents($Collection, &RelativePath($Target, $Stow));
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}
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}
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sub CommonParent {
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local($dir1, $dir2) = @_;
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local($result, $x);
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local(@d1) = split(/\/+/, $dir1);
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local(@d2) = split(/\/+/, $dir2);
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while (@d1 && @d2 && (($x = shift(@d1)) eq shift(@d2))) {
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$result .= "$x/";
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}
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chop($result);
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$result;
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}
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# Find the relative patch between
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# two paths given as arguments.
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sub RelativePath {
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local($a, $b) = @_;
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local($c) = &CommonParent($a, $b);
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local(@a) = split(/\/+/, $a);
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local(@b) = split(/\/+/, $b);
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local(@c) = split(/\/+/, $c);
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# if $c == "/something", scalar(@c) >= 2
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# but if $c == "/", scalar(@c) == 0
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# but we want 1
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my $length = scalar(@c) ? scalar(@c) : 1;
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splice(@a, 0, $length);
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splice(@b, 0, $length);
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unshift(@b, (('..') x (@a + 0)));
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&JoinPaths(@b);
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}
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# Basically concatenates the paths given
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# as arguments
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sub JoinPaths {
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local(@paths, @parts);
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local ($x, $y);
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local($result) = '';
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$result = '/' if ($_[0] =~ /^\//);
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foreach $x (@_) {
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@parts = split(/\/+/, $x);
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foreach $y (@parts) {
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push(@paths, $y) if ($y ne "");
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}
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}
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$result .= join('/', @paths);
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}
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sub Unstow {
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local($targetdir, $stow) = @_;
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local(@contents);
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local($content);
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local($linktarget, $stowmember, $collection);
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local(@stowmember);
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local($pure, $othercollection) = (1, '');
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local($subpure, $subother);
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local($empty) = (1);
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local(@puresubdirs);
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return (0, '') if (&JoinPaths($Target, $targetdir) eq $Stow);
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return (0, '') if (-e &JoinPaths($Target, $targetdir, '.stow'));
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warn sprintf("Unstowing in %s\n", &JoinPaths($Target, $targetdir))
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if ($Verbose > 1);
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if (!opendir(DIR, &JoinPaths($Target, $targetdir))) {
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warn "Warning: $ProgramName: Cannot read directory \"$dir\" ($!). Stow might leave some links. If you think, it does. Rerun Stow with appropriate rights.\n";
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}
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@contents = readdir(DIR);
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closedir(DIR);
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foreach $content (@contents) {
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next if (($content eq '.') || ($content eq '..'));
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$empty = 0;
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if (-l &JoinPaths($Target, $targetdir, $content)) {
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($linktarget = readlink(&JoinPaths($Target,
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$targetdir,
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$content)))
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|| die sprintf("%s: Cannot read link %s (%s)\n",
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$ProgramName,
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&JoinPaths($Target, $targetdir, $content),
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$!);
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if ($stowmember = &FindStowMember(&JoinPaths($Target,
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$targetdir),
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$linktarget)) {
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@stowmember = split(/\/+/, $stowmember);
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$collection = shift(@stowmember);
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if (grep(($collection eq $_), @Collections)) {
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&DoUnlink(&JoinPaths($Target, $targetdir, $content));
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} elsif ($pure) {
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if ($othercollection) {
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$pure = 0 if ($collection ne $othercollection);
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} else {
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$othercollection = $collection;
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}
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}
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} else {
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$pure = 0;
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}
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} elsif (-d &JoinPaths($Target, $targetdir, $content)) {
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($subpure, $subother) = &Unstow(&JoinPaths($targetdir, $content),
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&JoinPaths('..', $stow));
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if ($subpure) {
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push(@puresubdirs, "$content/$subother");
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}
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if ($pure) {
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if ($subpure) {
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if ($othercollection) {
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if ($subother) {
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if ($othercollection ne $subother) {
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$pure = 0;
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}
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}
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} elsif ($subother) {
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$othercollection = $subother;
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}
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} else {
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$pure = 0;
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}
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}
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} else {
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$pure = 0;
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}
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}
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# This directory was an initially empty directory therefore
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# We do not remove it.
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$pure = 0 if $empty;
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if ((!$pure || !$targetdir) && @puresubdirs) {
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&CoalesceTrees($targetdir, $stow, @puresubdirs);
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}
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($pure, $othercollection);
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}
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sub CoalesceTrees {
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local($parent, $stow, @trees) = @_;
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local($tree, $collection, $x);
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foreach $x (@trees) {
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($tree, $collection) = ($x =~ /^(.*)\/(.*)/);
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&EmptyTree(&JoinPaths($Target, $parent, $tree));
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&DoRmdir(&JoinPaths($Target, $parent, $tree));
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if ($collection) {
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&DoLink(&JoinPaths($stow, $collection, $parent, $tree),
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&JoinPaths($Target, $parent, $tree));
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}
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}
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}
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sub EmptyTree {
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local($dir) = @_;
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local(@contents);
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local($content);
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opendir(DIR, $dir)
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|| die "$ProgramName: Cannot read directory \"$dir\" ($!)\n";
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@contents = readdir(DIR);
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closedir(DIR);
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foreach $content (@contents) {
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next if (($content eq '.') || ($content eq '..'));
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if (-l &JoinPaths($dir, $content)) {
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&DoUnlink(&JoinPaths($dir, $content));
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} elsif (-d &JoinPaths($dir, $content)) {
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&EmptyTree(&JoinPaths($dir, $content));
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&DoRmdir(&JoinPaths($dir, $content));
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} else {
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&DoUnlink(&JoinPaths($dir, $content));
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}
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}
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}
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sub StowContents {
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local($dir, $stow) = @_;
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local(@contents);
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local($content);
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warn "Stowing contents of $dir\n" if ($Verbose > 1);
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opendir(DIR, &JoinPaths($Stow, $dir))
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|| die "$ProgramName: Cannot read directory \"$dir\" ($!)\n";
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@contents = readdir(DIR);
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closedir(DIR);
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foreach $content (@contents) {
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next if (($content eq '.') || ($content eq '..'));
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if (-d &JoinPaths($Stow, $dir, $content)) {
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&StowDir(&JoinPaths($dir, $content), $stow);
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} else {
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&StowNondir(&JoinPaths($dir, $content), $stow);
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}
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}
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}
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sub StowDir {
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local($dir, $stow) = @_;
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local(@dir) = split(/\/+/, $dir);
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local($collection) = shift(@dir);
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local($subdir) = join('/', @dir);
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local($linktarget, $stowsubdir);
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warn "Stowing directory $dir\n" if ($Verbose > 1);
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if (-l &JoinPaths($Target, $subdir)) {
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($linktarget = readlink(&JoinPaths($Target, $subdir)))
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|| die sprintf("%s: Could not read link %s (%s)\n",
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$ProgramName,
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&JoinPaths($Target, $subdir),
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$!);
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($stowsubdir =
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&FindStowMember(sprintf('%s/%s', $Target,
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join('/', @dir[0..($#dir - 1)])),
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$linktarget))
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|| (&Conflict($dir, $subdir), return);
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if (-e &JoinPaths($Stow, $stowsubdir)) {
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if ($stowsubdir eq $dir) {
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warn sprintf("%s already points to %s\n",
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&JoinPaths($Target, $subdir),
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&JoinPaths($Stow, $dir))
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if ($Verbose > 2);
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return;
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}
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if (-d &JoinPaths($Stow, $stowsubdir)) {
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&DoUnlink(&JoinPaths($Target, $subdir));
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&DoMkdir(&JoinPaths($Target, $subdir));
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&StowContents($stowsubdir, &JoinPaths('..', $stow));
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&StowContents($dir, &JoinPaths('..', $stow));
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} else {
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(&Conflict($dir, $subdir), return);
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}
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} else {
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&DoUnlink(&JoinPaths($Target, $subdir));
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&DoLink(&JoinPaths($stow, $dir),
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&JoinPaths($Target, $subdir));
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}
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} elsif (-e &JoinPaths($Target, $subdir)) {
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if (-d &JoinPaths($Target, $subdir)) {
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&StowContents($dir, &JoinPaths('..', $stow));
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} else {
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&Conflict($dir, $subdir);
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}
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} else {
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&DoLink(&JoinPaths($stow, $dir),
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&JoinPaths($Target, $subdir));
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}
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}
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sub StowNondir {
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local($file, $stow) = @_;
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local(@file) = split(/\/+/, $file);
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local($collection) = shift(@file);
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local($subfile) = join('/', @file);
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local($linktarget, $stowsubfile);
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if (-l &JoinPaths($Target, $subfile)) {
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($linktarget = readlink(&JoinPaths($Target, $subfile)))
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|| die sprintf("%s: Could not read link %s (%s)\n",
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$ProgramName,
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&JoinPaths($Target, $subfile),
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$!);
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($stowsubfile =
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&FindStowMember(sprintf('%s/%s', $Target,
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join('/', @file[0..($#file - 1)])),
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$linktarget))
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|| (&Conflict($file, $subfile), return);
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if (-e &JoinPaths($Stow, $stowsubfile)) {
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(&Conflict($file, $subfile), return)
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unless ($stowsubfile eq $file);
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warn sprintf("%s already points to %s\n",
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&JoinPaths($Target, $subfile),
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&JoinPaths($Stow, $file))
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if ($Verbose > 2);
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} else {
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&DoUnlink(&JoinPaths($Target, $subfile));
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&DoLink(&JoinPaths($stow, $file),
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&JoinPaths($Target, $subfile));
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}
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} elsif (-e &JoinPaths($Target, $subfile)) {
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&Conflict($file, $subfile);
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} else {
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&DoLink(&JoinPaths($stow, $file),
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&JoinPaths($Target, $subfile));
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}
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}
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sub DoUnlink {
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local($file) = @_;
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warn "UNLINK $file\n" if $Verbose;
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(unlink($file) || die "$ProgramName: Could not unlink $file ($!)\n")
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unless $NotReally;
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}
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sub DoRmdir {
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local($dir) = @_;
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warn "RMDIR $dir\n" if $Verbose;
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(rmdir($dir) || die "$ProgramName: Could not rmdir $dir ($!)\n")
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unless $NotReally;
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}
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sub DoLink {
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local($target, $name) = @_;
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warn "LINK $name to $target\n" if $Verbose;
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(symlink($target, $name) ||
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die "$ProgramName: Could not symlink $name to $target ($!)\n")
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unless $NotReally;
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}
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sub DoMkdir {
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local($dir) = @_;
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warn "MKDIR $dir\n" if $Verbose;
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(mkdir($dir, 0777)
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|| die "$ProgramName: Could not make directory $dir ($!)\n")
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unless $NotReally;
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}
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sub Conflict {
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local($a, $b) = @_;
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if ($Conflicts) {
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warn sprintf("CONFLICT: %s vs. %s\n", &JoinPaths($Stow, $a),
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&JoinPaths($Target, $b));
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} else {
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die sprintf("%s: CONFLICT: %s vs. %s\n",
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$ProgramName,
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&JoinPaths($Stow, $a),
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&JoinPaths($Target, $b));
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}
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}
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sub FindStowMember {
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local($start, $path) = @_;
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local(@x) = split(/\/+/, $start);
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local(@path) = split(/\/+/, $path);
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local($x);
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local(@d) = split(/\/+/, $Stow);
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while (@path) {
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$x = shift(@path);
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if ($x eq '..') {
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pop(@x);
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return '' unless @x;
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} elsif ($x) {
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push(@x, $x);
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}
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}
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while (@x && @d) {
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if (($x = shift(@x)) ne shift(@d)) {
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return '';
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}
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}
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return '' if @d;
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join('/', @x);
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}
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sub parent {
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local($path) = join('/', @_);
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local(@elts) = split(/\/+/, $path);
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pop(@elts);
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join('/', @elts);
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}
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sub usage {
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local($msg) = shift;
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|
if ($msg) {
|
|
print "$ProgramName: $msg\n";
|
|
}
|
|
print "$ProgramName (GNU Stow) version $Version\n\n";
|
|
print "Usage: $ProgramName [OPTION ...] PACKAGE ...\n";
|
|
print <<EOT;
|
|
-n, --no Do not actually make changes
|
|
-c, --conflicts Scan for conflicts, implies -n
|
|
-d DIR, --dir=DIR Set stow dir to DIR (default is current dir)
|
|
-t DIR, --target=DIR Set target to DIR (default is parent of stow dir)
|
|
-v, --verbose[=N] Increase verboseness (levels are 0,1,2,3;
|
|
-v or --verbose adds 1; --verbose=N sets level)
|
|
-D, --delete Unstow instead of stow
|
|
-R, --restow Restow (like stow -D followed by stow)
|
|
-V, --version Show Stow version number
|
|
-h, --help Show this help
|
|
EOT
|
|
exit($msg ? 1 : 0);
|
|
}
|
|
|
|
sub version {
|
|
print "$ProgramName (GNU Stow) version $Version\n";
|
|
exit(0);
|
|
}
|
|
|
|
# Local variables:
|
|
# mode: perl
|
|
# End:
|