68 lines
2.2 KiB
Nim
68 lines
2.2 KiB
Nim
## Nim-LibP2P
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## Copyright (c) 2018 Status Research & Development GmbH
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## Licensed under either of
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## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
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## * MIT license ([LICENSE-MIT](LICENSE-MIT))
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## at your option.
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## This file may not be copied, modified, or distributed except according to
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## those terms.
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## Small debug module that's enabled through a ``-d:debugout``
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## flag. It's inspired by the Nodejs ``debug`` module that
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## allows printing colorized output based on patterns. This
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## module is powered by the standard ``nre`` module and as such
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## it supports the same set of regexp expressions.
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##
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## To enable debug output, pass the ``debugout`` flag during build
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## time with ``-d`` flag. In addition, the debugout flag takes a comma
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## separated list of patters that will narow the debug output to
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## only those matched by the patterns. By default however, all
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## debug statements are outputed to the stderr.
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when defined(debugout) and not defined(release):
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import random,
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tables,
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nre,
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strutils,
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times,
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terminal,
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sequtils
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const debugout {.strdefine.}: string = ".*"
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type
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Match = object
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pattern: Regex
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color: string
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var matches: OrderedTable[string, Match] = initOrderedTable[string, Match]()
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var patrns = @[".*"]
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if debugout != "true":
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patrns = debugout.split(re"[,\s]").filterIt(it.len > 0)
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randomize()
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for p in patrns:
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matches[p] = Match(pattern: re(p), color: $rand(0..272)) # 256 ansi colors
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# matches["*"] = Match(pattern: re(".*"), color: $rand(0..272)) # 256 ansi colors
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if isTrueColorSupported():
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system.addQuitProc(resetAttributes)
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enableTrueColors()
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proc doDebug(data: string): void {.gcsafe.} =
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for m in matches.values:
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if data.match(m.pattern).isSome:
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stderr.writeLine("\u001b[38;5;" & m.color & "m " & alignLeft(data, 4) & "\e[0m")
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return
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template debug*(data: string) =
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let module = instantiationInfo()
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let line = "$# $#:$# - $#" %
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[now().format("yyyy-MM-dd HH:mm:ss:fffffffff"),
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module.filename[0 .. ^5],
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$module.line,
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data]
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doDebug(line)
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else:
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template debug*(data: string) = discard |