gvpr

graph stream editor, similar to awk for graphs

TLDR

Run gvpr script

$ gvpr -f [script.gvpr] [input.gv]

Inline program

$ gvpr 'N[color=="red"]' [input.gv]

Output to file

$ gvpr -o [output.gv] -f [script.gvpr] [input.gv]

Select nodes by attribute

$ gvpr 'N[degree>3]' [graph.gv]

SYNOPSIS

gvpr [options] program [files]

gvpr is a graph stream editor, similar to awk for graphs. It processes Graphviz graphs using a pattern-action programming language.
The tool can filter, transform, and analyze graphs. It supports node and edge selection, attribute manipulation, and graph restructuring.

PARAMETERS

PROGRAM

Gvpr program or expression.

FILES

Input DOT files.

-f FILE

Read program from file.

-o FILE

Output file.

-c

Check syntax only.

-i

Print node info.

-V

Verbose mode.

Display help information.

CAVEATS

Part of Graphviz package. Learning curve for programming language. Complex operations can be slow.

HISTORY

gvpr was developed as part of Graphviz at AT&T Labs to provide AWK-like processing for graph structures.