[tools] testbot/web: Add failure links to full logs on the job details page.

[Francois Gouget]

Long logs can make it hard to find the lines for a given failure. So add
an index pointing to the first line of a given failure (identified by
its bug id).
Also add links to the first and last failure.

Signed-off-by: Francois Gouget 
---
 testbot/web/JobDetails.pl | 38 ++++++++++++++++++++++++++++++++------
 1 file changed, 32 insertions(+), 6 deletions(-)

diff --git a/testbot/web/JobDetails.pl b/testbot/web/JobDetails.pl
index efdd4d9b0..6d3f13cd0 100644
--- a/testbot/web/JobDetails.pl
+++ b/testbot/web/JobDetails.pl
@@ -404,9 +404,9 @@ sub GetFailureLinks($$)
                    } @$FailureIds);
 }

-sub GenerateFullLog($$$$)
+sub GenerateFullLog($$$$$)
 {
-  my ($self, $Dir, $LogName, $HideLog) = @_;
+  my ($self, $Dir, $LogId, $LogName, $HideLog) = @_;

my $LogInfo = LoadLogErrors("$Dir/$LogName");
   if (defined $LogInfo->{BadLog})
@@ -426,7 +426,7 @@ sub GenerateFullLog($$$$)
     print "<pre class='log-note'>Some WineTest results could not be used to detect new errors: $LogInfo->{BadRef}</pre>\n";
   }

-  my (%ErrCategory, %ErrFailures);
+  my (%ErrCategory, %ErrFailures, %LogBugs);
   foreach my $GroupName (@{$LogInfo->{ErrGroupNames}})
   {
     my $Group = $LogInfo->{ErrGroups}->{$GroupName};
@@ -437,8 +437,31 @@ sub GenerateFullLog($$$$)
       {
         $ErrCategory{$LineNo} = $Group->{IsNew}->[$ErrIndex] ? "fullnew" : "error";
         $ErrFailures{$LineNo} = $Group->{Failures}->{$ErrIndex};
+
+        if ($ErrFailures{$LineNo})
+        {
+          foreach my $FailureId (@{$ErrFailures{$LineNo}})
+          {
+           my $Failure = $self->{Failures}->GetItem($FailureId);
+           $LogBugs{$Failure->BugId} ||= [$LineNo, $Failure->BugDescription];
+          }
+        }
       }
+      $LogBugs{-1} ||= [$LineNo, ""];
+      $LogBugs{9999999} = [$LineNo, ""];
+    }
+  }
+  if (%LogBugs)
+  {
+    print "<p>Failures index:";
+    foreach my $Label (sort { $a <=> $b } keys %LogBugs)
+    {
+      my ($LineNo, $Title) = @{$LogBugs{$Label}};
+      $Label = $Label < 0 ? "First" : $Label == 9999999 ? "Last" : $Label;
+      $Title = " title='". $self->escapeHTML($Title) ."'" if ($Title);
+      print " <a href='#k${LogId}L$LineNo'$Title>$Label</a>"
     }
+    print "</p>\n";
   }

my $GetCategory = $LogName =~ /.report$/ ? &GetReportLineCategory :
@@ -463,7 +486,7 @@ sub GenerateFullLog($$$$)
       my $Category = $ErrCategory{$LineNo} || $GetCategory->($Line);
       if ($Category ne "none")
       {
-        $Html =~ s~^(.*\S)\s*\r?$~<span class='log-$Category'>$1</span>~;
+        $Html =~ s~^(.*\S)\s*\r?$~<span id='k${LogId}L$LineNo' class='log-$Category'>$1</span>~;
       }
       if ($ErrFailures{$LineNo})
       {
@@ -487,7 +510,10 @@ sub GenerateFullLog($$$$)
     # Extra groups don't have a line number
     next if ($Group->{LineNo});

-    print "<div class='LogDllName'>$GroupName</div>\n";
+    # Extra errors don't have line numbers but there should be few of them.
+    # So just create one id for them all so the shortcut  to the first / last
+    # error has somewhere to go even if it's not 100% accurate.
+    print "<div id='k${LogId}L0' class='LogDllName'>$GroupName</div>\n";
     for my $ErrIndex (0..$#{$Group->{Errors}})
     {
       if ($IsEmpty)
@@ -592,7 +618,7 @@ EOF
       $Url = $self->escapeHTML($Url);
       my $HideLog = $Action eq "Hide" ? " ondblclick='HideLog(event, "$Url")'" : "";

-      my $LogIsEmpty = $self->GenerateFullLog($TaskDir, $MoreInfo->{Full}, $HideLog);
+      my $LogIsEmpty = $self->GenerateFullLog($TaskDir, $StepTask->GetKey(), $MoreInfo->{Full}, $HideLog);
       if ($LogIsEmpty)
       {
         if ($StepTask->Status eq "canceled")