test.lua: output table contents

[nokute78]

Recently, we changed the format of filter_lua, JSON -> Lua table.
So, we also need to modify cb_print to handle Lua table.

Now, cb_print doesn't output contents of table.

$ bin/fluent-bit -i mem -F lua -p script=../scripts/test.lua -p call=cb_print -m '*' -o stdout
Fluent-Bit v0.14.0
Copyright (C) Treasure Data

[2018/06/11 22:53:12] [ info] [engine] started (pid=20490)
mem.0	1528725193.000884	table: 0x41f16340
mem.0	1528725194.000263	table: 0x41f16398
mem.0	1528725195.000821	table: 0x41f1ccf0

My patch is to output such JSON like format.

$ bin/fluent-bit -i mem -F lua -p script=../scripts/test.lua -p call=cb_print -m '*' -o stdout
Fluent-Bit v0.14.0
Copyright (C) Treasure Data

[2018/06/11 22:48:53] [ info] [engine] started (pid=20207)
mem.0:  [1528724934.002288, {  Mem.free => 625464, Swap.free => 2064380, Swap.used => 0, Mem.used => 3294704, Mem.total => 3920168, Swap.total => 2064380 }]
mem.0:  [1528724935.001287, {  Mem.free => 625464, Swap.free => 2064380, Swap.used => 0, Mem.used => 3294704, Mem.total => 3920168, Swap.total => 2064380 }]
mem.0:  [1528724936.000483, {  Mem.free => 625464, Swap.free => 2064380, Swap.used => 0, Mem.used => 3294704, Mem.total => 3920168, Swap.total => 2064380 }]

[edsiper]

@nokute78 does it work with nested field ? e.g: {"key": {"map1", 123, "map2": [1, 2, 3]}} ?

[nokute78]

@edsiper No. It supports flat table only.

As you know, it needs recursive function to parse nested table.
I thought it was too much for test script.

[edsiper]

thanks