allow working in repositories with textual symref HEAD

diff --git a/gitweb.cgi b/gitweb.cgi
index 1814f7f..26c7395 100755 (executable)
--- a/gitweb.cgi
+++ b/gitweb.cgi
@@ -396,6 +396,23 @@ sub git_get_type {
        return $type;
 }
 
+sub git_read_head {
+       my $project = shift;
+       my $oENV = $ENV{'GIT_DIR'};
+       my $retval = undef;
+       $ENV{'GIT_DIR'} = "$projectroot/$project";
+       if (open my $fd, "-|", "$gitbin/git-rev-parse", "--verify", "HEAD") {
+               my $head = <$fd>;
+               close $fd;
+               chomp $head;
+               if ($head =~ m/^[0-9a-fA-F]{40}$/) {
+                       $retval = $head;
+               }
+       }
+       $ENV{'GIT_DIR'} = $oENV;
+       return $retval;
+}
+
 sub git_read_hash {
        my $path = shift;
 
@@ -823,7 +840,7 @@ sub git_project_list {
                die_error(undef, "No project found.");
        }
        foreach my $pr (@list) {
-               my $head = git_read_hash("$pr->{'path'}/HEAD");
+               my $head = git_read_head($pr->{'path'});
                if (!defined $head) {
                        next;
                }
@@ -994,7 +1011,7 @@ sub git_read_refs {
 
 sub git_summary {
        my $descr = git_read_description($project) || "none";
-       my $head = git_read_hash("$project/HEAD");
+       my $head = git_read_head($project);
        my %co = git_read_commit($head);
        my %cd = date_str($co{'committer_epoch'}, $co{'committer_tz'});
 
@@ -1034,7 +1051,7 @@ sub git_summary {
              "<tr><td>owner</td><td>$owner</td></tr>\n" .
              "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n" .
              "</table>\n";
-       open my $fd, "-|", "$gitbin/git-rev-list --max-count=17 " . git_read_hash("$project/HEAD") or die_error(undef, "Open failed.");
+       open my $fd, "-|", "$gitbin/git-rev-list --max-count=17 " . git_read_head($project) or die_error(undef, "Open failed.");
        my (@revlist) = map { chomp; $_ } <$fd>;
        close $fd;
        print "<div>\n" .
@@ -1172,7 +1189,7 @@ sub git_summary {
 }
 
 sub git_tag {
-       my $head = git_read_hash("$project/HEAD");
+       my $head = git_read_head($project);
        git_header_html();
        print "<div class=\"page_nav\">\n" .
              $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
@@ -1211,7 +1228,7 @@ sub git_tag {
 }
 
 sub git_tags {
-       my $head = git_read_hash("$project/HEAD");
+       my $head = git_read_head($project);
        git_header_html();
        print "<div class=\"page_nav\">\n" .
              $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
@@ -1270,7 +1287,7 @@ sub git_tags {
 }
 
 sub git_heads {
-       my $head = git_read_hash("$project/HEAD");
+       my $head = git_read_head($project);
        git_header_html();
        print "<div class=\"page_nav\">\n" .
              $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
@@ -1343,7 +1360,7 @@ sub git_get_hash_by_path {
 
 sub git_blob {
        if (!defined $hash && defined $file_name) {
-               my $base = $hash_base || git_read_hash("$project/HEAD");
+               my $base = $hash_base || git_read_head($project);
                $hash = git_get_hash_by_path($base, $file_name, "blob") || die_error(undef, "Error lookup file.");
        }
        open my $fd, "-|", "$gitbin/git-cat-file blob $hash" or die_error(undef, "Open failed.");
@@ -1407,13 +1424,13 @@ sub git_blob_plain {
 
 sub git_tree {
        if (!defined $hash) {
-               $hash = git_read_hash("$project/HEAD");
+               $hash = git_read_head($project);
                if (defined $file_name) {
-                       my $base = $hash_base || git_read_hash("$project/HEAD");
+                       my $base = $hash_base || $hash;
                        $hash = git_get_hash_by_path($base, $file_name, "tree");
                }
                if (!defined $hash_base) {
-                       $hash_base = git_read_hash("$project/HEAD");
+                       $hash_base = $hash;
                }
        }
        $/ = "\0";
@@ -1497,7 +1514,7 @@ sub git_tree {
 
 sub git_rss {
        # http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
-       open my $fd, "-|", "$gitbin/git-rev-list --max-count=150 " . git_read_hash("$project/HEAD") or die_error(undef, "Open failed.");
+       open my $fd, "-|", "$gitbin/git-rev-list --max-count=150 " . git_read_head($project) or die_error(undef, "Open failed.");
        my (@revlist) = map { chomp; $_ } <$fd>;
        close $fd or die_error(undef, "Reading rev-list failed.");
        print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
@@ -1566,7 +1583,7 @@ sub git_opml {
 
        foreach my $pr (@list) {
                my %proj = %$pr;
-               my $head = git_read_hash("$proj{'path'}/HEAD");
+               my $head = git_read_head($proj{'path'});
                if (!defined $head) {
                        next;
                }
@@ -1587,7 +1604,7 @@ sub git_opml {
 }
 
 sub git_log {
-       my $head = git_read_hash("$project/HEAD");
+       my $head = git_read_head($project);
        if (!defined $hash) {
                $hash = $head;
        }
@@ -2083,7 +2100,7 @@ sub git_commitdiff_plain {
 
 sub git_history {
        if (!defined $hash) {
-               $hash = git_read_hash("$project/HEAD");
+               $hash = git_read_head($project);
        }
        my %co = git_read_commit($hash);
        if (!%co) {
@@ -2159,7 +2176,7 @@ sub git_search {
                die_error("", "Text field empty.");
        }
        if (!defined $hash) {
-               $hash = git_read_hash("$project/HEAD");
+               $hash = git_read_head($project);
        }
        my %co = git_read_commit($hash);
        if (!%co) {
@@ -2300,7 +2317,7 @@ sub git_search {
 }
 
 sub git_shortlog {
-       my $head = git_read_hash("$project/HEAD");
+       my $head = git_read_head($project);
        if (!defined $hash) {
                $hash = $head;
        }