examples/run.lua

   1 gr = require "graph"
   2
   3 if #arg < 1 then
   4   print("usage: lua run.lua FILE")
   5   os.exit(-1)
   6 end
   7
   8 --
   9 -- For simple formatted printing
  10 --
  11 local function printf(fmt, ...)
  12   print(string.format(fmt, ...))
  13 end
  14
  15 local function gshow(g)
  16   local fn = os.tmpname() .. ".dot"
  17   g:write(fn)
  18   os.execute("dotty "..fn)
  19   os.remove(fn)
  20 end
  21
  22 -- Provide simple reference for frequently used functions (optional)
  23 node, edge, subgraph, cluster, digraph, strictdigraph, ugraph =
  24   gr.node, gr.edge, gr.subgraph, gr.cluster, gr.digraph, gr.strictdigraph, gr.graph
  25
  26 local f, err = assert(loadfile(arg[1]))
  27 local g = f()
  28
  29 printf("Generated 'dot' format:")
  30 g:write()
  31 gshow(g)
  32 g:close()