add news item for myrepos 1.20130705

[code/myrepos.git] / webcheckout

diff --git a/webcheckout b/webcheckout
index 19d46208e94965a0b657a05ff7516ef878bd5163..e48d9de34dd9ed6ecd2fe6d8fb824711edc31e54 100755 (executable)
--- a/webcheckout
+++ b/webcheckout
@@ -2,7 +2,7 @@
 
 =head1 NAME
 
-debcheckout - check out repositories referenced on a web page
+webcheckout - check out repositories referenced on a web page
 
 =head1 SYNOPSIS
 
@@ -16,7 +16,7 @@ a subdirectory of the current directory, using whatever VCS program is
 appropriate for that repository (git, svn, etc).
 
 The information about the repositories is embedded in the web page using
-the rel=vcs microformat, which is documented at
+the rel=vcs-* microformat, which is documented at
 <http://kitenet.net/~joey/rfc/rel-vcs/>.
 
 If the optional destdir parameter is specified, VCS programs will be asked
@@ -35,25 +35,33 @@ anonymous repositories when possible. If you have an account that
 allows you to use authenticated repositories, you might want to use this
 option.
 
-=item -n
+=item --no-act, -n
 
 Do not actually check anything out, just print out the commands that would
 be run to check out the repositories.
 
-=item -q
+=item --quiet, -q
 
 Quiet mode. Do not print out the commands being run. (The VCS commands
 may still be noisy however.)
 
 =back
 
+=head1 PREREQUISITES
+
+To use this program you will need lots of VCS programs installed,
+obviously. It also depends on the perl LWP and HTML::Parser modules.
+
+If the perl URI module is installed, webcheckout can heuristically guess
+what you mean by partial URLs, such as "kitenet.net/~joey"'
+
 =head1 AUTHOR
 
 Copyright 2009 Joey Hess <joey@kitenet.net>
 
 Licensed under the GNU GPL version 2 or higher.
 
-This program is included in mr <http://kitenet.net/~joey/code/mr/>
+This program is included in myrepos <http://myrepos.branchable.com/>
 
 =cut
 
@@ -75,7 +83,7 @@ my $noact=0;
 # Controls whether to perfer repos that use authentication.
 my $want_auth=0;
 
-# Controls where to check out to. If not set, the vcs is allowed to
+# Controls where to check out to. If not set, the VCS is allowed to
 # decide.
 my $destdir;
 
@@ -111,6 +119,11 @@ sub getopts {
        $url=shift @ARGV;
        $destdir=shift @ARGV;
 
+       eval q{use URI::Heuristic};
+       if (! $@) {
+               $url=URI::Heuristic::uf_uristr($url);
+       }
+
        if ($noact) {
                $quiet=0;
        }
@@ -127,23 +140,26 @@ sub doit {
 sub better {
        my ($a, $b)=@_;
 
-       my $firstanon=$b;
+       my @anon;
        foreach my $r (@anon_urls) {
                if ($a->{href} =~ /$r/) {
-                       $firstanon=$a;
-                       last;
+                       push @anon, $a;
                }
                elsif ($b->{href} =~ /$r/) {
-                       $firstanon=$b;
-                       last;
+                       push @anon, $b;
                }
        }
 
        if ($want_auth) {
-               return $firstanon != $a;
+               # Whichever is authed is better.
+               return 1 if ! @anon || ! grep { $_ eq $a } @anon;
+               return 0 if ! grep { $_ eq $b } @anon;
+               # Neither is authed, so the better anon method wins.
+               return $anon[0] == $a;
        }
        else {
-               return $firstanon == $a;
+               # Better anon method wins.
+               return @anon && $anon[0] == $a;
        }
 }
 
@@ -152,21 +168,26 @@ sub better {
 sub dedup {
        my %seenhref;
        my %bytitle;
+       my @others;
        foreach my $repo (@_) {
                if (exists $repo->{title} &&
-                   length $repo->{title} &&
-                   exists $bytitle{$repo->{title}}) {
-                       my $other=$bytitle{$repo->{title}};
-                       next unless better($repo, $other);
-                       delete $bytitle{$other->{title}}
+                   length $repo->{title}) {
+                       if (exists $bytitle{$repo->{title}}) {
+                               my $other=$bytitle{$repo->{title}};
+                               next unless better($repo, $other);
+                               delete $bytitle{$other->{title}}
+                       }
+
+                       if (! $seenhref{$repo->{href}}++) {
+                               $bytitle{$repo->{title}}=$repo;
+                       }
                }
-
-               if (! $seenhref{$repo->{href}}++) {
-                       $bytitle{$repo->{title}}=$repo;
+               else {
+                       push @others, $repo;
                }
        }
 
-       return values %bytitle;
+       return values %bytitle, @others;
 }
 
 sub parse {
@@ -174,15 +195,38 @@ sub parse {
 
        my @ret;
        my $parser=HTML::Parser->new(api_version => 3);
+       my $abody=undef;
+       my $aref=undef;
        $parser->handler(start => sub {
                my $tagname=shift;
                my $attr=shift;
-               return if lc $tagname ne 'link';
-               return if ! exists $attr->{rel} || lc $attr->{rel} ne 'vcs';
+
                return if ! exists $attr->{href} || ! length $attr->{href};
-               return if ! exists $attr->{type} || ! length $attr->{type};
+               return if ! exists $attr->{rel} || $attr->{rel} !~ /^vcs-(.+)/i;
+               $attr->{type}=lc($1);
+
+               # need to collect the body of the <a> tag if there is no title
+               if ($tagname eq "a" && ! exists $attr->{title}) {
+                       $abody="";
+                       $aref=$attr;
+               }
+
                push @ret, $attr;
        }, "tagname, attr");
+       $parser->handler(text => sub {
+               if (defined $aref) {
+                       $abody.=join(" ", @_);
+               }
+       }, "text");
+       $parser->handler(end => sub {
+               my $tagname=shift;
+               if ($tagname eq "a" && defined $aref) {
+                       $aref->{title}=$abody;
+                       $aref=undef;
+                       $abody=undef;
+               }
+       }, "tagname");
+       $parser->report_tags(qw{link a});
        $parser->parse($page);
        $parser->eof;
 
@@ -190,7 +234,6 @@ sub parse {
 }
 
 getopts();
-print "$url\n";
 
 my $page=get($url);
 if (! defined $page) {
@@ -202,10 +245,16 @@ if (! @repos) {
        die "no repositories found on $url\n";
 }
 
+#use Data::Dumper;
+#print Dumper(\@repos);
+#exit;
+
 if (defined $destdir && @repos > 1) {
        # create subdirs of $destdir for the multiple repos
-       mkdir($destdir);
-       chdir($destdir) || die "failed to chdir to $destdir: $!";
+       if (! $noact) {
+               mkdir($destdir);
+               chdir($destdir) || die "failed to chdir to $destdir: $!";
+       }
        $destdir=undef;
 }
 
@@ -225,6 +274,3 @@ foreach my $repo (@repos) {
        }
 }
 exit($errors > 0);
-
-#use Data::Dumper;
-#print Dumper(\@repos);