nop

Check validity and pretty-print graphs in canonical format. Graphviz filters: acyclic, bcomps, comps, edgepaint, gvcolor, gvpack, mingle, nop, sccmap, tred, & unflatten. More information: https://www.graphviz.org/pdf/nop.1.pdf.

• Pretty-print one or more graphs in canonical format:

nop path/to/input1.gv path/to/input2.gv … > path/to/output.gv

• Check one or more graphs for validity, producing no output graph:

nop -p path/to/input1.gv path/to/input2.gv …

• Display help:

nop -?