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PROGRAM:

NAME


graph-easy - render/convert graphs in/from various formats

SYNOPSIS


Convert between graph formats and layout/render graphs:

graph-easy [options] [inputfile [outputfile]]

echo "[ Bonn ] - car -> [ Berlin ]" | graph-easy
graph-easy --input=graph.dot --as_ascii
graph-easy --html --output=mygraph.html graph.txt
graph-easy graph.txt graph.svg
graph-easy graph.txt --as_dot | dot -Tpng -o graph.png
graph-easy graph.txt --png
graph-easy graph.vcg --dot
graph-easy graph.dot --gdl
graph-easy graph.dot --graphml

ARGUMENTS


Here are the most important options, more are listed in the full documentation:

--help Print the full documentation, not just this short overview.

--input Specify the input file name. Example:

graph-easy --input=input.txt

The format will be auto-detected, override it with --from.

--output Specify the output file name. Example:

graph-easy --output=output.txt input.txt

--as Specify the output format. Example:

graph-easy --as=ascii input.txt

Valid formats are:

ascii ASCII art rendering
boxart Unicode Boxart rendering
html HTML
svg Scalable Vector Graphics
graphviz the DOT language
dot alias for "graphviz"
txt Graph::Easy text
vcg VCG (Visualizing Compiler Graphs - a subset of GDL) text
gdl GDL (Graph Description Language) text
graphml GraphML

In addition, the following formats are understood and piped through the program
specified with the --renderer option (default: dot):

bmp Windows bitmap
gif GIF
hpgl HP-GL/2 vector graphic
jpg JPEG
pcl PCL printer language
pdf PDF
png PNG
ps Postscript
ps2 Postscript with PDF notations (see graphviz documentation)
tga Targa bitmap
tif TIFF bitmap

The default format will be determined by the output filename extension, and is
"ascii", if the output filename was not set.

You can also use ONE argument of the form "--as_ascii" or "--ascii".

--from Specify the input format. Valid formats are:

graphviz the DOT language
txt Graph::Easy text
vcg VCG text
gdl GDL (Graph Description Language) text

If not specified, the input format is auto-detected.

You can also use ONE argument of the form "--from_dot", etc.

--renderer
The external program (default: "dot") used to render the output formats like
"png", "jpg" etc. Some choices are "neato", "twopi", "fdp" or "circo".

--parse Input will only be parsed, without any output generation. Useful in combination
with "--debug=1" or "--stats". Example:

graph-easy input.txt --parse --debug=1

--stats Write various statistics about the input graph to STDERR. Best used in
combination with "--parse":

graph-easy input.txt --parse --stats

--timeout Set the timeout in seconds for the Graph::Easy layouter that generates ASCII,
HTML, SVG or boxart output. If the layout does not finish in this time, it will
be aborted. Example:

graph-easy input.txt --timeout=500

Conversion to DOT, VCG/GDL, GraphML or plain text ignores the timeout.

The default is 240 seconds (4 minutes).

--verbose Write info regarding the conversion process to STDERR.

DESCRIPTION


"graph-easy" reads a description of a graph (a connected network of nodes and edges, not a
pie chart :-) and then converts this to the desired output format.

By default, the input will be read from STDIN, and the output will go to STDOUT. The input
is expected to be encoded in UTF-8, the output will also be UTF-8.

It understands the following formats as input:

Graph::Easy http://bloodgate.com/perl/graph/manual/
DOT http://www.graphviz.org/
VCG http://rw4.cs.uni-sb.de/~sander/html/gsvcg1.html
GDL http://www.aisee.com/

The formats are automatically detected, regardless of the input file name, but you can
also explicitly declare your input to be in one specific format.

The output can be a dump of the graph in one of the following formats:

Graph::Easy http://bloodgate.com/perl/graph/manual/
DOT http://www.graphviz.org/
VCG http://rw4.cs.uni-sb.de/~sander/html/gsvcg1.html
GDL http://www.aisee.com/
GraphML http://graphml.graphdrawing.org/

In addition, "Graph::Easy" can also create layouts of graphs in one of the following
output formats:

HTML SVG ASCII BOXART

Note that for SVG output, you need to install the module Graph::Easy::As_svg first.

As a shortcut, you can also specify the output format as 'png', this will cause
"graph-easy" to pipe the input in graphviz format to the "dot" program to create a PNG
file in one step. The following two examples are equivalent:

graph-easy graph.txt --dot | dot -Tpng -o graph.png
graph-easy graph.txt --png

OTHER ARGUMENTS


"graph-easy" supports a few more arguments in addition to the ones from above:

--version Write version info and exit.

--debug=N Set the debug level (1..3). Warning, this will generate huge amounts of hard to
understand output on STDERR. Example:

graph-easy input.txt --output=test.html --debug=1

--png, --dot, --vcg, --gdl, --txt, --ascii, --boxart, --html, --svg
Given exactly one of these options, produces the desired output format.

EXAMPLES


ASCII output
echo "[ Bonn ] -- car --> [ Berlin ], [ Ulm ]" | graph-easy

+--------+ car +-----+
| Bonn | -----> | Ulm |
+--------+ +-----+
|
| car
v
+--------+
| Berlin |
+--------+

Graphviz example output
echo "[ Bonn ] -- car --> [ Berlin ], [ Ulm ]" | graph-easy --dot
digraph GRAPH_0 {

edge [ arrowhead=open ];
graph [ rankdir=LR ];
node [
fontsize=11,
fillcolor=white,
style=filled,
shape=box ];

Bonn -> Ulm [ label=car ]
Bonn -> Berlin [ label=car ]

}

VCG example output
echo "[ Bonn ] -- car --> [ Berlin ], [ Ulm ]" | graph-easy --vcg
graph: {
title: "Untitled graph"

node: { title: "Berlin" }
node: { title: "Bonn" }
node: { title: "Ulm" }

edge: { label: "car" sourcename: "Bonn" targetname: "Ulm" }
edge: { label: "car" sourcename: "Bonn" targetname: "Berlin" }

}

GDL example output
GDL (Graph Description Language) is a superset of VCG, and thus the output will look
almost the same as VCG:

echo "[ Bonn ] -- car --> [ Berlin ], [ Ulm ]" | graph-easy --gdl
graph: {
title: "Untitled graph"

node: { title: "Berlin" }
node: { title: "Bonn" }
node: { title: "Ulm" }

edge: { label: "car" source: "Bonn" target: "Ulm" }
edge: { label: "car" source: "Bonn" target: "Berlin" }

}

GraphML example output
GraphML is XML:

echo "[ Bonn ] -- car --> [ Berlin ], [ Ulm ]" | graph-easy --graphml
<?xml version="1.0" encoding="UTF-8"?>
<graphml xmlns="http://graphml.graphdrawing.org/xmlns"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns
http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd">

<!-- Created by Graph::Easy v0.58 at Mon Aug 20 00:01:25 2007 -->

<key id="d0" for="edge" attr.name="label" attr.type="string"/>

<graph id="G" edgedefault="directed">
<node id="Berlin">
</node>
<node id="Bonn">
</node>
<node id="Ulm">
</node>
<edge source="Bonn" target="Berlin">
<data key="d0">car</data>
</edge>
<edge source="Bonn" target="Ulm">
<data key="d0">car</data>
</edge>
</graph>
<graphml>

CAVEATS


Please note that it is impossible to convert 100% from one format to another format since
every graph language out there has features that are unique to only this language.

In addition, the conversion process always converts the input first into an Graph::Easy
graph, and then to the desired output format.

This means that only features and attributes that are actually valid in Graph::Easy are
supported yet. Work in making Graph::Easy an universal format supporting as much as
possible is still in progress.

Attributes that are not yet supported natively by Graph::Easy are converted to custom
attributes with a prefixed "x-format-", f.i. "x-dot-". Upon output to the same format,
these are converted back, but conversion to a different format will lose these attributes.

For a list of what problems still remain, please see the TODO file in the "Graph::Easy"
distribution on CPAN:

<http://search.cpan.org/~tels/Graph-Easy/>

If you notice anything wrong, or miss attributes, please file a bug report on

<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Graph-Easy>

so we can fix it and include the missing things into Graph::Easy!

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