version bump

These were suggested by paultag@debian.org

1. debian/changelog just has the one entry, to indicate what has changed from
the perspective of a user of this package. The old changes in that file have
never been uploaded to Debian

2. Uploading to unstable instead of experimental

3. Bumped up debhelper compat to 9

4. Removed DM-Upload-Allowed

5. Minor standards bump

Changes

@@ -1,48 +1,3 @@
-feedgnuplot (1.38)
-
-  * hardcopy defaults:
-   - no enhanced text mode
-   - larger font size
-
- -- Dima Kogan <dima@secretsauce.net>  Wed, 27 Jul 2016 22:15:11 -0700
-
-feedgnuplot (1.37)
-
-  * At the end of a streaming plot, include the last chunk of data
-  * Added --equation to the completions
-
- -- Dima Kogan <dima@secretsauce.net>  Fri, 01 Jan 2016 08:09:43 -0800
-
-feedgnuplot (1.36)
-
-  * Added --equation to plot symbolic equations
-
- -- Dima Kogan <dima@secretsauce.net>  Fri, 13 Nov 2015 11:08:26 -0800
-
-feedgnuplot (1.35)
-
-  * replaced a 'say' with 'print'. Should work better with ancient perls
-  * an "exit" command now has effect even with triggered-only replotting
-
-  * More sophisticated handling of termination conditions:
-    - Without --exit, we always end up with an interactive plot when the
-    input data is exhausted or when the user sends a ^C to the pipeline
-    - When streaming, the first ^C does not kill feedgnuplot
-  
-  * Removed threading
-
- -- Dima Kogan <dima@secretsauce.net>  Sun, 01 Nov 2015 12:50:33 -0800
-
-feedgnuplot (1.34)
-
-  * Fix for "Use of implicit split to @_ is deprecated". Thanks to Corey
-    Putkunz
-
-  * Declaring feedgnuplot as a package to let MetaCPAN index this
-    distribution
-
- -- Dima Kogan <dima@secretsauce.net>  Wed, 14 May 2014 00:45:24 -0700
-
 feedgnuplot (1.33)
 
   * fixed incorrect plotting of --timefmt --rangesize plots

bin/feedgnuplot

@@ -1,20 +1,19 @@
 #!/usr/bin/perl
-
-package feedgnuplot; # for the metacpan indexer
-
 use strict;
 use warnings;
 use Getopt::Long;
 use Time::HiRes qw( usleep gettimeofday tv_interval );
 use IO::Handle;
-use IO::Select;
 use List::Util qw( first );
 use Scalar::Util qw( looks_like_number );
-use Text::ParseWords; # for shellwords
+use Text::ParseWords;
+use threads;
+use threads::shared;
+use Thread::Queue;
 use Pod::Usage;
 use Time::Piece;
 
-my $VERSION = 1.38;
+my $VERSION = 1.33;
 
 my %options;
 interpretCommandline();
@@ -27,11 +26,16 @@ interpretCommandline();
 # with --xlen, the offsets are preserved by using $curve->{datastring_offset} to
 # represent the offset IN THE ORIGINAL STRING of the current start of the
 # datastring
+
+
 my @curves = ();
 
 # list mapping curve names to their indices in the @curves list
 my %curveIndices = ();
 
+# now start the data acquisition and plotting threads
+my $dataQueue;
+
 # Whether any new data has arrived since the last replot
 my $haveNewData;
 
@@ -41,16 +45,39 @@ my $last_replot_time = [gettimeofday];
 # whether the previous replot was timer based
 my $last_replot_is_from_timer = 1;
 
+my $streamingFinished : shared = undef;
 
-my $prev_timed_replot_time = [gettimeofday];
-my $this_replot_is_from_timer;
-my $stdin    = IO::Handle->new();
-die "Couldn't open STDIN" unless $stdin->fdopen(fileno(STDIN),"r");
-my $selector = IO::Select->new( $stdin );
+if($options{stream})
+{
+  $dataQueue  = Thread::Queue->new();
+  my $addThr  = threads->create(\&mainThread);
 
+  # spawn the plot updating thread. If I'm replotting from a data trigger, I don't need this
+  my $plotThr = threads->create(\&plotUpdateThread) if $options{stream} > 0;
 
+  while(<>)
+  {
+    chomp;
 
-mainThread();
+    last if /^exit/;
+
+    # place every line of input to the queue, so that the plotting thread can process it. if we are
+    # using an implicit domain (x = line number), then we send it on the data queue also, since
+    # $. is not meaningful in the plotting thread
+    if(!$options{domain})
+    {
+      $_ .= " $.";
+    }
+    $dataQueue->enqueue($_);
+  }
+
+  $streamingFinished = 1;
+
+  $plotThr->join() if defined $plotThr;
+  $addThr->join();
+}
+else
+{ mainThread(); }
 
 
 
@@ -89,7 +116,6 @@ sub interpretCommandline
   $options{extracmds}  = [];
   $options{set}        = [];
   $options{unset}      = [];
-  $options{equation}   = [];
 
   $options{curvestyleall} = '';
   $options{styleall}      = '';
@@ -103,7 +129,6 @@ sub interpretCommandline
              'zmin=f', 'zmax=f', 'y2=s@',
              'style=s{2}', 'curvestyle=s{2}', 'curvestyleall=s', 'styleall=s', 'with=s', 'extracmds=s@', 'set=s@', 'unset=s@',
              'square!', 'square_xy!', 'hardcopy=s', 'maxcurves=i', 'monotonic!', 'timefmt=s',
-             'equation=s@',
              'histogram=s@', 'binwidth=f', 'histstyle=s',
              'terminal=s',
              'rangesize=s{2}', 'rangesizeall=i', 'extraValuesPerPoint=i',
@@ -199,9 +224,6 @@ sub interpretCommandline
   #  -1 for triggered replotting
   #  >0 for timed replotting
   #  undef if not streaming
-  #
-  #  Note that '0' is not allowed, so !$options{stream} will do the expected
-  #  thing
   if(defined $options{stream})
   {
     # if no streaming period is given, default to 1Hz.
@@ -349,7 +371,7 @@ sub interpretCommandline
     $options{timefmt} =~ s/^\s*//;
     $options{timefmt} =~ s/\s*$//;
 
-    my $Nfields = () = split /\s+/, $options{timefmt}, -1;
+    my $Nfields = scalar split( ' ', $options{timefmt});
     $options{timefmt_Ncols} = $Nfields;
 
     # make sure --xlen is an integer. With a timefmt xlen goes through strptime
@@ -358,7 +380,7 @@ sub interpretCommandline
     {
       if( $options{xlen} - int($options{xlen}) )
       {
-        print STDERR "When streaming --xlen MUST be an integer. Rounding up to the nearest second\n";
+        say STDERR "When streaming --xlen MUST be an integer. Rounding up to the nearest second";
         $options{xlen} = 1 + int($options{xlen});
       }
     }
@@ -379,6 +401,19 @@ sub getGnuplotVersion
   return $gnuplotVersion;
 }
 
+sub plotUpdateThread
+{
+  while(! $streamingFinished)
+  {
+    usleep( $options{stream} * 1e6 );
+
+    # indicate that the timer was the replot source
+    $dataQueue->enqueue('replot timertick');
+  }
+
+  $dataQueue->enqueue(undef);
+}
+
 sub sendRangeCommand
 {
   my ($name, $min, $max) = @_;
@@ -414,64 +449,16 @@ sub makeDomainNumeric
   return $domain0;
 }
 
-
-sub getNextLine
-{
-    while(1)
-    {
-        $this_replot_is_from_timer = undef;
-
-        # if we're not streaming, or we're doing triggered-only replotting, simply
-        # do a blocking read
-        return $stdin->getline()
-          if (! $options{stream} || $options{stream} < 0);
-
-
-        my $now = [gettimeofday];
-        my $time_remaining = $options{stream} - tv_interval($prev_timed_replot_time, $now);
-
-        if ( $time_remaining < 0 )
-        {
-            $prev_timed_replot_time = $now;
-            $this_replot_is_from_timer = 1;
-            return 'replot';
-        }
-
-        if ($selector->can_read($time_remaining))
-        {
-            return $stdin->getline();
-        }
-    }
-}
-
 sub mainThread
 {
     local *PIPE;
     my $dopersist = '';
 
-    if( getGnuplotVersion() >= 4.3 && # --persist not available before this
-
-        # --persist is needed for the "half-alive" state (see documentation for
-        # --exit). This state is only used with these options:
-        !$options{stream} && $options{exit})
+    if( !$options{stream} && getGnuplotVersion() >= 4.3)
     {
       $dopersist = '--persist';
     }
 
-    # We trap SIGINT to kill the data input, but keep the plot up. see
-    # documentation for --exit
-    if ($options{stream} && !$options{exit})
-    {
-        $SIG{INT} = sub
-        {
-            print STDERR "$0 received SIGINT. Send again to quit\n";
-            $SIG{INT} = undef;
-        };
-    }
-
-
-
-
     if(exists $options{dump})
     {
       *PIPE = *STDOUT;
@@ -497,11 +484,11 @@ sub mainThread
       }
 
       my %terminalOpts =
-      ( eps  => 'postscript noenhanced solid color enhanced eps',
-        ps   => 'postscript noenhanced solid color landscape 12',
-        pdf  => 'pdfcairo noenhanced solid color font ",12" size 11in,8.5in',
-        png  => 'png noenhanced size 1280,1024',
-        svg  => 'svg noenhanced');
+      ( eps  => 'postscript solid color enhanced eps',
+        ps   => 'postscript solid color landscape 10',
+        pdf  => 'pdfcairo solid color font ",10" size 11in,8.5in',
+        png  => 'png size 1280,1024',
+        svg  => 'svg');
 
       if( !defined $options{terminal} &&
            defined $outputfileType    &&
@@ -552,7 +539,7 @@ sub mainThread
       print(PIPE "set view equal xy\n");
     }
 
-    # For the specified values, set the legend entries to 'title "blah blah"'
+# For the specified values, set the legend entries to 'title "blah blah"'
     if(@{$options{legend}})
     {
       # @{$options{legend}} is a list where consecutive pairs are (curveID,
@@ -567,7 +554,7 @@ sub mainThread
       }
     }
 
-    # add the extra curve options
+# add the extra curve options
     if(@{$options{curvestyle}})
     {
       # @{$options{curvestyle}} is a list where consecutive pairs are (curveID,
@@ -582,22 +569,22 @@ sub mainThread
       }
     }
 
-    # For the values requested to be printed on the y2 axis, set that
+# For the values requested to be printed on the y2 axis, set that
     addCurveOption($_, 'axes x1y2') foreach (@{$options{y2}});
 
-    # timefmt
+# timefmt
     if( $options{timefmt} )
     {
       print(PIPE "set timefmt '$options{timefmt}'\n");
       print(PIPE "set xdata time\n");
     }
 
-    # add the extra global options
+# add the extra global options
     print(PIPE "$_\n")       foreach (@{$options{extracmds}});
     print(PIPE "set $_\n")   foreach (@{$options{set}});
     print(PIPE "unset $_\n") foreach (@{$options{unset}});
 
-    # set up histograms
+# set up histograms
     $options{binwidth} ||= 1;   # if no binwidth given, set it to 1
     print PIPE
       "set boxwidth $options{binwidth}\n" .
@@ -605,6 +592,11 @@ sub mainThread
 
     setCurveAsHistogram( $_ ) foreach (@{$options{histogram}});
 
+# set all the axis ranges
+    # If a bound isn't given I want to set it to the empty string, so I can communicate it simply to
+    # gnuplot
+    print PIPE "set xtics\n";
+
     if(@{$options{y2}})
     {
       print PIPE "set ytics nomirror\n";
@@ -633,7 +625,8 @@ sub mainThread
     # number of seconds since the UNIX epoch.
     my $domain0_numeric;
 
-    while( defined ($_ = getNextLine()) )
+    # I should be using the // operator, but I'd like to be compatible with perl 5.8
+    while( $_ = (defined $dataQueue ? $dataQueue->dequeue() : <>))
     {
       next if /^#/o;
 
@@ -647,104 +640,123 @@ sub mainThread
 
         if(/^replot/o )
         {
-          replot( $domain0_numeric );
+          # /timertick/ determines if the timer was the source of the replot
+          replot( $domain0_numeric, /timertick/ );
           next;
         }
 
-        last if /^exit/o;
+        # /exit/ is handled in the data-reading thread
       }
 
-      # parse the incoming data lines. The format is
-      # x id0 dat0 id1 dat1 ....
-      # where idX is the ID of the curve that datX corresponds to
-      #
-      # $options{domain} indicates whether the initial 'x' is given or not (if not, the line
-      # number is used)
-      # $options{dataid} indicates whether idX is given or not (if not, the point order in the
-      # line is used)
-      # 3d plots require $options{domain}, and dictate "x y" for the domain instead of just "x"
-
-      my @fields = split;
-
-      if($options{domain})
+      if(! /^replot/o)
       {
-        if( $options{timefmt} )
-        {
-            # no point if doing anything unless I have at least the domain and
-            # 1 piece of data
-            next if @fields < $options{timefmt_Ncols}+1;
+        # parse the incoming data lines. The format is
+        # x id0 dat0 id1 dat1 ....
+        # where idX is the ID of the curve that datX corresponds to
+        #
+        # $options{domain} indicates whether the initial 'x' is given or not (if not, the line
+        # number is used)
+        # $options{dataid} indicates whether idX is given or not (if not, the point order in the
+        # line is used)
+        # 3d plots require $options{domain}, and dictate "x y" for the domain instead of just "x"
 
-            $domain[0] = join (' ', splice( @fields, 0, $options{timefmt_Ncols}) );
-            $domain0_numeric = makeDomainNumeric( $domain[0] );
-        }
-        elsif(!$options{'3d'})
-        {
-            # no point if doing anything unless I have at least the domain and
-            # 1 piece of data
-            next if @fields < 1+1;
+        my @fields = split;
 
-            $domain[0] = $domain0_numeric = shift @fields;
+        if($options{domain})
+        {
+          if( $options{timefmt} )
+          {
+              # no point if doing anything unless I have at least the domain and
+              # 1 piece of data
+              next if @fields < $options{timefmt_Ncols}+1;
+
+              $domain[0] = join (' ', splice( @fields, 0, $options{timefmt_Ncols}) );
+              $domain0_numeric = makeDomainNumeric( $domain[0] );
+          }
+          elsif(!$options{'3d'})
+          {
+              # no point if doing anything unless I have at least the domain and
+              # 1 piece of data
+              next if @fields < 1+1;
+
+              $domain[0] = $domain0_numeric = shift @fields;
+          }
+          else
+          {
+              # no point if doing anything unless I have at least the domain and
+              # 1 piece of data
+              next if @fields < 2+1;
+
+              @domain = splice(@fields, 0, 2);
+          }
+
+          if( $options{monotonic} )
+          {
+            if( defined $latestX && $domain0_numeric < $latestX )
+            {
+              # the x-coordinate of the new point is in the past, so I wipe out
+              # all the data and start anew. Before I wipe the old data, I
+              # replot the old data
+              replot( $domain0_numeric );
+              clearCurves();
+              $latestX = undef;
+            }
+            else
+            { $latestX = $domain0_numeric; }
+          }
         }
         else
         {
-            # no point if doing anything unless I have at least the domain and
-            # 1 piece of data
-            next if @fields < 2+1;
-
-            @domain = splice(@fields, 0, 2);
+          # since $. is not meaningful in the plotting thread if we're using the data queue, we pass
+          # $. on the data queue in that case
+          if(defined $dataQueue)
+          {
+            $domain[0] = pop @fields;
+          }
+          else
+          {
+            $domain[0] = $.;
+          }
+          $domain0_numeric = makeDomainNumeric( $domain[0] );
         }
 
-        if( $options{monotonic} )
+        my $id = -1;
+
+        while(@fields)
         {
-          if( defined $latestX && $domain0_numeric < $latestX )
-          {
-            # the x-coordinate of the new point is in the past, so I wipe out
-            # all the data and start anew. Before I wipe the old data, I
-            # replot the old data
-            replot( $domain0_numeric );
-            clearCurves();
-            $latestX = undef;
-          }
-          else
-          { $latestX = $domain0_numeric; }
+            if($options{dataid})
+            {
+                $id = shift @fields;
+            }
+            else
+            {
+                $id++;
+            }
+
+            # I'd like to use //, but I guess some people are still on perl 5.8
+            my $rangesize = exists $options{rangesize_hash}{$id} ?
+              $options{rangesize_hash}{$id} :
+              $options{rangesize_default};
+
+            last if @fields < $rangesize;
+
+            pushPoint(getCurve($id),
+                      join(' ',
+                           @domain,
+                           splice( @fields, 0, $rangesize ) ) . "\n",
+                      $domain0_numeric);
         }
       }
-      else
-      {
-        $domain[0] = $.;
-        $domain0_numeric = makeDomainNumeric( $domain[0] );
-      }
-
-      my $id = -1;
-
-      while(@fields)
-      {
-          if($options{dataid})
-          {
-              $id = shift @fields;
-          }
-          else
-          {
-              $id++;
-          }
-
-          # I'd like to use //, but I guess some people are still on perl 5.8
-          my $rangesize = exists $options{rangesize_hash}{$id} ?
-            $options{rangesize_hash}{$id} :
-            $options{rangesize_default};
-
-          last if @fields < $rangesize;
-
-          pushPoint(getCurve($id),
-                    join(' ',
-                         @domain,
-                         splice( @fields, 0, $rangesize ) ) . "\n",
-                    $domain0_numeric);
-      }
+    }
+
+    # if we were streaming, we're now done!
+    if( $options{stream} )
+    {
+      return;
     }
 
     # finished reading in all. Plot what we have
-    plotStoredData() unless $options{stream} && $options{exit};
+    plotStoredData();
 
     if ( defined $options{hardcopy})
     {
@@ -753,7 +765,7 @@ sub mainThread
       # sleep until the plot file exists, and it is closed. Sometimes the output
       # is still being written at this point. If the output filename starts with
       # '|', gnuplot pipes the output to that process, instead of writing to a
-      # file. In that case I don't make sure the file exists, since there IS no
+      # file. In that case I don't make sure the file exists, since there IS not
       # file
       if( $options{hardcopy} !~ /^\|/ )
       {
@@ -765,13 +777,6 @@ sub mainThread
       return;
     }
 
-    # data exhausted. If we're killed now, then we should peacefully die.
-    if($options{stream} && !$options{exit})
-    {
-        print STDERR "Input data exhausted\n";
-        $SIG{INT} = undef;
-    }
-
     # we persist gnuplot, so we shouldn't need this sleep. However, once
     # gnuplot exits, but the persistent window sticks around, you can no
     # longer interactively zoom the plot. So we still sleep
@@ -815,9 +820,7 @@ sub plotStoredData
   my @nonemptyCurves = grep { $_->{datastring} } @curves;
   my @extraopts = map {$_->{options}} @nonemptyCurves;
 
-  my $body = join('', map { "$_," } @{$options{equation}});
-  $body .= join(', ' , map({ "'-' $_" } @extraopts) );
-
+  my $body = join(', ' , map({ "'-' $_" } @extraopts) );
   if($options{'3d'}) { print PIPE "splot $body\n"; }
   else               { print PIPE  "plot $body\n"; }
 
@@ -971,7 +974,7 @@ sub replot
   # }
 
 
-  my ($domain0_numeric) = @_;
+  my ($domain0_numeric, $replot_is_from_timer) = @_;
 
   my $now = [gettimeofday];
 
@@ -981,7 +984,7 @@ sub replot
       # if the last replot was timer-based, but this one isn't, force a replot.
       # This makes sure that a replot happens for a domain rollover shortly
       # after a timer replot
-      !$this_replot_is_from_timer && $last_replot_is_from_timer ||
+      !$replot_is_from_timer && $last_replot_is_from_timer ||
 
       # if enough time has elapsed since the last replot, it's ok to replot
       tv_interval ( $last_replot_time, $now ) > 0.8*$options{stream} )
@@ -1007,7 +1010,7 @@ sub replot
 
     # update replot state
     $last_replot_time          = $now;
-    $last_replot_is_from_timer = $this_replot_is_from_timer;
+    $last_replot_is_from_timer = $replot_is_from_timer;
   }
 }
 
@@ -1536,17 +1539,12 @@ in the plot. Defaults to 1.0 if not given.
 
 C<--histstyle style>
 
-Normally, histograms are generated with the 'smooth frequency' gnuplot style.
-C<--histstyle> can be used to select different C<smooth> settings (see the
-gnuplot C<help smooth> page for more info). Allowed values are 'frequency' (the
-default), 'unique', 'cumulative' and 'cnormal'. 'unique' indicates whether a bin
-has at least one item in it: instead of counting the items, it'll always report
-0 or 1. 'cumulative' is the integral of the 'frequency' histogram. 'cnormal' is
-like 'cumulative', but rescaled to end up at 1.0. Note that there's no
-normalized 'frequency' option because gnuplot does not provide one.
-
-
-C<help smooth>
+Normally, histograms are generated with the 'smooth freq' gnuplot style.
+C<--histstyle> can be used to select different 'smooth' settings. Allowed are
+'unique', 'cumulative' and 'cnormal'. 'unique' indicates whether a bin has at
+least one item in it: instead of counting the items, it'll always report 0 or 1.
+'cumulative' is the integral of the "normal" histogram. 'cnormal' is like
+'cumulative', but rescaled to end up at 1.0.
 
 =item
 
@@ -1614,34 +1612,6 @@ times.
 
 =item
 
-C<--equation xxx>
-
-Gnuplot can plot both data and symbolic equations. C<feedgnuplot> generally
-plots data, but with this option can plot symbolic equations I<also>. This is
-generally intended to augment data plots, since for equation-only plots you
-don't need C<feedgnuplot>. C<--equation> can be passed multiple times for
-multiple equations. The given strings are passed to gnuplot directly without any
-thing added or removed, so styling and such should be applied in the string. A
-basic example:
-
- seq 100 | awk '{print $1/10, $1/100}' |
-   feedgnuplot --with 'lines lw 3' --domain --ymax 1
-               --equation 'sin(x)/x' --equation 'cos(x)/x with lines lw 4'
-
-Here I plot the incoming data (points along a line) with the given style (a line
-with thickness 3), I<and> I plot two damped sinusoids on the same plot. The
-sinusoids are not affected by C<feedgnuplot> styling, so their styles are set
-separately, as in this example. More complicated example:
-
- seq 360 | perl -nE '$th=$_/360 * 3.14*2; $c=cos($th); $s=sin($th); say "$c $s"' |
-   feedgnuplot --domain --square
-               --set parametric --set "trange [0:2*3.14]" --equation "sin(t),cos(t)"
-
-Here the data I generate is points along the unit circle. I plot these as
-points, and I I<also> plot a true circle as a parametric equation.
-
-=item
-
 C<--square>
 
 Plot data with aspect ratio 1. For 3D plots, this controls the aspect ratio for
@@ -1727,80 +1697,10 @@ is possible to send the output produced this way to gnuplot directly.
 
 C<--exit>
 
-This controls the details of what happens when the input data is exhausted, or
-when some part of the C<feedgnuplot> pipeline is killed. This option does
-different things depending on whether C<--stream> is active, so read this
-closely.
-
-With interactive gnuplot terminals (qt, x11, wxt), the plot windows live in a
-separate process from the main C<gnuplot> process. It is thus possible for the
-main C<gnuplot> process to exit, while leaving the plot windows up (a caveat is
-that such decapitated windows aren't interactive). To be clear, there are 3
-possible states:
-
-=over
-
-=item Alive: C<feedgnuplot>, C<gnuplot> alive, plot window process alive, no
-shell prompt (shell busy with C<feedgnuplot>)
-
-=item Half-alive: C<feedgnuplot>, C<gnuplot> dead, plot window process alive
-(but non-interactive), shell prompt available
-
-=item Dead: C<feedgnuplot>, C<gnuplot> dead, plot window process dead, shell
-prompt available
-
-=back
-
-The C<--exit> option controls the details of this behavior. The possibilities
-are:
-
-=over
-
-=item No C<--stream>, input pipe is exhausted (all data read in)
-
-=over
-
-=item default; no C<--exit>
-
-Alive. Need to Ctrl-C to get back into the shell
-
-=item C<--exit>
-
-Half-alive. Non-interactive prompt up, and the shell accepts new commands.
-Without C<--stream> the goal is to show a plot, so a Dead state is not useful
-here.
-
-=back
-
-=item C<--stream>, input pipe is exhausted (all data read in) or the
-C<feedgnuplot> process terminated
-
-=over
-
-=item default; no C<--exit>
-
-Alive. Need to Ctrl-C to get back into the shell
-
-=item C<--exit>
-
-Dead. No plot is shown, and the shell accepts new commands. With C<--stream> the
-goal is to show a plot as the data comes in, which we have been doing. Now that
-we're done, we can clean up everything.
-
-=back
-
-=back
-
-Note that one usually invokes C<feedgnuplot> as a part of a shell pipeline:
-
- $ write_data | feedgnuplot
-
-If the user terminates this pipeline with ^C, then I<all> the processes in the
-pipeline receive SIGINT. This normally kills C<feedgnuplot> and all its
-C<gnuplot> children, and we let this happen unless C<--stream> and no C<--exit>.
-If C<--stream> and no C<--exit>, then we ignore the first ^C. The data feeder
-dies, and we behave as if the input data was exhausted. A second ^C kills us
-also.
+Terminate the feedgnuplot process after passing data to gnuplot. The window will
+persist but will not be interactive. Without this option feedgnuplot keeps
+running and must be killed by the user. Note that this option works only with
+later versions of gnuplot and only with some gnuplot terminals.
 
 =item
 
@@ -1854,12 +1754,10 @@ in a Thinkpad.
  $ while true; do cat /proc/acpi/ibm/thermal | awk '{$1=""; print}' ; sleep 1; done |
    feedgnuplot --stream --xlen 100 --lines --autolegend --ymax 100 --ymin 20 --ylabel 'Temperature (deg C)'
 
-=head2 Plotting a histogram of file sizes in a directory, granular to 10MB
+=head2 Plotting a histogram of file sizes in a directory
 
  $ ls -l | awk '{print $5/1e6}' |
-   feedgnuplot --histogram 0 --with boxes
-     --binwidth 10 --set 'style fill solid'
-     --ymin 0 --xlabel 'File size (MB)' --ylabel Frequency
+   feedgnuplot --histogram 0 --with boxes --ymin 0 --xlabel 'File size (MB)' --ylabel Frequency
 
 =head1 ACKNOWLEDGEMENT
 

completions/bash/feedgnuplot

@@ -20,7 +20,6 @@ complete -W               \
     --extracmds           \
     --set                 \
     --unset               \
-    --equation            \
     --geometry            \
     --hardcopy            \
     --help                \

completions/zsh/_feedgnuplot

@@ -32,7 +32,6 @@ _arguments -S
     '*--extracmds[Additional gnuplot commands]:command'                           \
     '*--set[Additional 'set' gnuplot commands]:set-option'                        \
     '*--unset[Additional 'unset' gnuplot commands]:unset-option'                  \
-    '*--equation[Raw symbolic equation]:equation'                                 \
     '--square[Plot data with square aspect ratio]'                                \
     '--square_xy[For 3D plots, set square aspect ratio for ONLY the x,y axes]'    \
     '--hardcopy[Plot to a file]:filename'                                         \

debian/changelog

@@ -0,0 +1,72 @@
+feedgnuplot (1.33-1) unstable; urgency=low
+
+  * Upstream update: fixed incorrect plotting of --timefmt --rangesize
+    plots
+
+ -- Dima Kogan <dima@secretsauce.net>  Thu, 06 Feb 2014 23:19:02 -0800
+
+feedgnuplot (1.32-1) unstable; urgency=low
+
+  * Added --rangesize and --rangesizeall. Different curves can now plot
+    different-size tuples
+
+ -- Dima Kogan <dima@secretsauce.net>  Wed, 05 Feb 2014 14:00:44 -0800
+
+feedgnuplot (1.30-1) unstable; urgency=low
+
+  * made the VCS links canonical
+  * added --set, --unset, --with, --style, --styleall
+
+ -- Dima Kogan <dima@secretsauce.net>  Fri, 24 Jan 2014 15:50:03 -0800
+
+feedgnuplot (1.28-1) unstable; urgency=low
+
+  * Upstream update:
+    - Removed example debianization
+    - Removed unreliable unit tests from automated testing (Closes: #731080)
+  * gnuplot dependency now favors graphical gnuplot packages
+  * Removed Anton Gladky from the Uploaders
+
+ -- Dima Kogan <dima@secretsauce.net>  Wed, 04 Dec 2013 02:05:08 -0800
+
+feedgnuplot (1.26-1) unstable; urgency=low
+
+  [ Dima Kogan ]
+  * Minor POD update
+  * Added test suite
+  * Added initial support for --timefmt. Currently time/date data is
+    supported only at the x-axis domain
+  * Added --exit option for force feedgnuplot to return even if gnuplot
+    may not yet be done rendering (patch by Eric Schulte)
+  * Reformatted the documentation
+  * y2-axis curves no longer have a thicker line by default
+  * --hardcopy now handles piped output (gnuplot 'set output |process'
+    syntax)
+
+  [ Anton Gladky ]
+  * Add libipc-run-perl to Build-Depends to execute tests
+
+ -- Dima Kogan <dima@secretsauce.net>  Sun, 20 Oct 2013 01:19:51 -0700
+
+feedgnuplot (1.24-2) unstable; urgency=low
+
+  * Now building the html documentation from the correct POD source
+
+ -- Dima Kogan <dima@secretsauce.net>  Sun, 28 Apr 2013 17:42:52 -0700
+
+feedgnuplot (1.24-1) unstable; urgency=low
+
+  * Fixed regression in --monotonic. This works again now
+  * moved POD back into the main source file. This fixes the broken usage
+    messages
+  * added --version
+  * fixed watchfile to work with newer github pages
+  * priority now optional
+
+ -- Dima Kogan <dima@secretsauce.net>  Fri, 08 Feb 2013 02:01:32 -0800
+
+feedgnuplot (1.23-2) unstable; urgency=low
+
+  * Initial Debian release (Closes: #686413)
+
+ -- Dima Kogan <dima@secretsauce.net>  Tue, 30 Oct 2012 11:14:01 -0700

debian/compat

@@ -0,0 +1 @@
+9

debian/control

@@ -0,0 +1,19 @@
+Source: feedgnuplot
+Section: science
+Priority: optional
+Build-Depends: debhelper (>= 9), libstring-shellquote-perl, perl, gawk, gnuplot, libipc-run-perl
+Maintainer: Debian Science Maintainers <debian-science-maintainers@lists.alioth.debian.org>
+Uploaders: Dima Kogan <dima@secretsauce.net>
+Standards-Version: 3.9.4
+Homepage: https://github.com/dkogan/feedgnuplot
+Vcs-Git: git://anonscm.debian.org/debian-science/packages/feedgnuplot.git
+Vcs-Browser: http://anonscm.debian.org/gitweb/?p=debian-science/packages/feedgnuplot.git
+
+Package: feedgnuplot
+Architecture: all
+Depends: ${misc:Depends}, ${perl:Depends}, gnuplot-qt | gnuplot-x11 | gnuplot
+Description: Pipe-oriented frontend to Gnuplot
+ Flexible, command-line-oriented frontend to Gnuplot. Creates plots from data
+ coming in on STDIN or given in a filename passed on the commandline. Various
+ data representations are supported, as is hardcopy output and streaming display
+ of live data.

debian/copyright

@@ -0,0 +1,24 @@
+Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Source: https://github.com/dkogan/feedgnuplot
+Upstream-Contact: Dima Kogan, <dima@secretsauce.net>
+Upstream-Name: feedgnuplot
+
+Files: *
+Copyright: 2011, Dima Kogan <dima@secretsauce.net>
+License: Artistic or GPL-1+
+
+License: Artistic
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the Artistic License, which comes with Perl.
+ .
+ On Debian GNU/Linux systems, the complete text of the Artistic License
+ can be found in `/usr/share/common-licenses/Artistic'.
+
+License: GPL-1+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 1, or (at your option)
+ any later version.
+ .
+ On Debian GNU/Linux systems, the complete text of version 1 of the
+ General Public License can be found in `/usr/share/common-licenses/GPL-1'.

debian/feedgnuplot.doc-base

@@ -0,0 +1,9 @@
+Document: feedgnuplot
+Title: Feedgnuplot Manual
+Author: Dima Kogan
+Abstract: Formatted manpage for feedgnuplot
+Section: Science/Data Analysis
+
+Format: HTML
+Index: /usr/share/doc/feedgnuplot/feedgnuplot.html
+Files: /usr/share/doc/feedgnuplot/feedgnuplot.html

debian/feedgnuplot.docs

@@ -0,0 +1 @@
+feedgnuplot.html

debian/feedgnuplot.install

@@ -0,0 +1,2 @@
+completions/bash/feedgnuplot /etc/bash_completion.d/
+completions/zsh/_feedgnuplot /usr/share/zsh/vendor-completions

debian/gbp.conf

@@ -0,0 +1,4 @@
+[DEFAULT]
+debian-branch = debian
+upstream-tag = v%(version)s
+pristine-tar = True

debian/rules

@@ -0,0 +1,12 @@
+#!/usr/bin/make -f
+
+%:
+	dh $@
+
+override_dh_auto_build:
+	dh_auto_build
+	pod2html --title=feedgnuplot bin/feedgnuplot > feedgnuplot.html
+
+override_dh_auto_clean:
+	rm -rf feedgnuplot.html pod2htm*
+	dh_auto_clean

debian/source/format

@@ -0,0 +1 @@
+3.0 (quilt)

debian/watch

@@ -0,0 +1,4 @@
+version=3
+opts=uversionmangle=s/(\d)[_\.\-\+]?((RC|rc|pre|dev|beta|alpha|b|a)\d*)$/$1~$2/,dversionmangle=s/\+(debian|dfsg|ds|deb)\d*$// \
+https://github.com/dkogan/feedgnuplot/tags .*/v?(\d.*)\.(?:tgz|tbz2|txz|tar\.(?:gz|bz2|xz))
+# Bart Martens <bartm@debian.org>  Sat, 22 Dec 2012 12:54:18 +0000