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annotate semiconginev2/old/settings.nim @ 1218:56781cc0fc7c compiletime-tests

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did: renamge main package
author sam <sam@basx.dev>
date Wed, 17 Jul 2024 21:01:37 +0700
parents semicongine/old/settings.nim@a3eb305bcac2
children
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1 import std/logging
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2 import std/streams
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3 import std/parsecfg
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4 import std/strutils
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5 import std/parseutils
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6 import std/strformat
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7 import std/tables
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8 import std/os
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9
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10 import ./core
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11
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12 when CONFIGHOTRELOAD:
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13 var
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14 configUpdates: Channel[(string, string)]
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15 configUpdates.open()
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16
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17 # runtime configuration
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18 # =====================
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19 # namespace is the path from the CONFIGROOT to the according settings file without the file extension
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20 # a settings file must always have the extension CONFIGEXTENSION
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21 # a fully qualified settings identifier can be in the form {namespace}.{section}.{key}
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22 # {key} and {section} may not contain dots
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23
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24 # a "namespace" is the path from the settings root to an *.CONFIGEXTENSION file, without the file extension
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25 # settings is a namespace <-> settings mapping
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26 var allsettings: Table[string, Config]
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27
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28 proc configRoot(): string =
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29 joinPath(absolutePath(getAppDir()), CONFIGROOT)
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30
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31 proc getFile(namespace: string): string =
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32 joinPath(configRoot(), namespace & "." & CONFIGEXTENSION)
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33
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34 iterator walkConfigNamespaces(): string =
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35 for file in walkDirRec(dir = configRoot(), relative = true, checkDir = true):
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36 if file.endsWith("." & CONFIGEXTENSION):
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37 yield file[0 ..< ^(CONFIGEXTENSION.len + 1)]
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38
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39 proc loadAllConfig(): Table[string, Config] =
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40 for ns in walkConfigNamespaces():
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41 result[ns] = ns.getFile().loadConfig()
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42
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43 proc ReloadSettings*() =
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44 allsettings = loadAllConfig()
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45
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46 proc configStr(key, section, namespace: string): string =
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47 when CONFIGHOTRELOAD:
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48 while configUpdates.peek() > 0:
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49 let (updatedNamespace, updatedConfig) = configUpdates.recv()
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50 allsettings[updatedNamespace] = loadConfig(newStringStream(updatedConfig))
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51 if not allsettings.hasKey(namespace):
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52 raise newException(Exception, &"Settings {namespace}.{section}.{key} was not found")
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53 allsettings[namespace].getSectionValue(section, key)
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54
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55 proc Setting*[T: int|float|string](key, section, namespace: string): T =
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56 when T is int:
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57 let value = configStr(key, section, namespace)
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58 if parseInt(value, result) == 0:
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59 raise newException(Exception, &"Unable to parse int from settings {namespace}.{section}.{key}: {value}")
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60 elif T is float:
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61 let value = configStr(key, section, namespace)
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62 if parseFloat(value, result) == 0:
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63 raise newException(Exception, &"Unable to parse float from settings {namespace}.{section}.{key}: {value}")
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64 else:
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65 result = configStr(key, section, namespace)
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66
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67 proc Setting*[T: int|float|string](identifier: string): T =
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68 # identifier can be in the form:
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69 # {namespace}.{key}
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70 # {namespace}.{section}.{key}
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71 let parts = identifier.rsplit(".")
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72 if parts.len == 1:
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73 raise newException(Exception, &"Setting with name {identifier} has no namespace")
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74 if parts.len == 2: result = Setting[T](parts[1], "", parts[0])
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75 else: result = Setting[T](parts[^1], parts[^2], joinPath(parts[0 .. ^3]))
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77 proc HadConfigUpdate*(): bool =
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78 when CONFIGHOTRELOAD == true:
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79 result = configUpdates.peek() > 0
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80
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81 allsettings = loadAllConfig()
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82
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83 when CONFIGHOTRELOAD == true:
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84 import std/times
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85
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86 proc configFileWatchdog() {.thread.} =
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87 var configModTimes: Table[string, Time]
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88 while true:
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89 for namespace in walkConfigNamespaces():
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90 if not (namespace in configModTimes):
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91 configModTimes[namespace] = Time()
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92 let lastMod = namespace.getFile().getLastModificationTime()
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93 if lastMod > configModTimes[namespace]:
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94 configModTimes[namespace] = lastMod
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95 let configStr = newFileStream(namespace.getFile()).readAll()
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96 configUpdates.send((namespace, configStr))
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97 sleep CONFIGHOTRELOADINTERVAL
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98 var thethread: Thread[void]
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99 createThread(thethread, configFileWatchdog)
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100
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101 if DEBUG:
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102 setLogFilter(lvlAll)
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103 else:
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104 setLogFilter(lvlWarn)