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 for nop:
  nop -?