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[backend/logging] Allow colorful systemd output

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Since journalctl strips them by default, there's no reason not to include them for compatibility reasons. This change also simplifies the custom logger code greatly.
This commit is contained in:
Laura Hausmann 2024-08-14 04:16:01 +02:00
parent 8267bc06de
commit fbebc91983
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GPG key ID: D044E84C5BE01605
1 changed files with 32 additions and 136 deletions
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164
Iceshrimp.Backend/Core/Extensions/ConsoleLoggerExtensions.cs
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@ -1,4 +1,3 @@
using System.Diagnostics;
using Microsoft.Extensions.Logging.Abstractions;
using Microsoft.Extensions.Logging.Console;
@ -8,19 +7,9 @@ public static class ConsoleLoggerExtensions
{
public static ILoggingBuilder AddCustomConsoleFormatter(this ILoggingBuilder builder)
{
if (Environment.GetEnvironmentVariable("INVOCATION_ID") is not null)
{
builder.AddConsole(options => options.FormatterName = "systemd-custom")
.AddConsoleFormatter<CustomSystemdConsoleFormatter, ConsoleFormatterOptions>();
}
else
{
builder.AddConsole(options => options.FormatterName = "custom")
return builder.AddConsole(options => options.FormatterName = "custom")
.AddConsoleFormatter<CustomFormatter, ConsoleFormatterOptions>();
}
return builder;
}
}
/*
@ -114,7 +103,8 @@ file static class ConsoleUtils
return Convert.ToBoolean(emitAnsiColorCodes);
}
var enabled = !Console.IsOutputRedirected;
var enabled = !Console.IsOutputRedirected ||
Environment.GetEnvironmentVariable("INVOCATION_ID") is not null;
if (enabled)
{
@ -142,6 +132,7 @@ file sealed class CustomFormatter() : ConsoleFormatter("custom"), ISupportExtern
new(' ', GetLogLevelString(LogLevel.Information).Length + LoglevelPadding.Length);
private static readonly string NewLineWithMessagePadding = Environment.NewLine + MessagePadding;
private static readonly bool IsSystemd = Environment.GetEnvironmentVariable("INVOCATION_ID") is not null;
private IExternalScopeProvider? _scopeProvider;
@ -178,14 +169,17 @@ file sealed class CustomFormatter() : ConsoleFormatter("custom"), ISupportExtern
var logLevelColors = GetLogLevelConsoleColors(logLevel);
var logLevelString = GetLogLevelString(logLevel);
var prefix = IsSystemd ? GetSyslogSeverityIndicatorString(logEntry.LogLevel) : null;
if (prefix != null) textWriter.Write(prefix);
textWriter.WriteColoredMessage(logLevelString, logLevelColors.Background, logLevelColors.Foreground);
CreateDefaultLogMessage(textWriter, logEntry, message, scope);
CreateDefaultLogMessage(textWriter, logEntry, message, scope, prefix);
}
private static void CreateDefaultLogMessage<TState>(
TextWriter textWriter, in LogEntry<TState> logEntry,
string message, string? scope
string message, string? scope, string? prefix
)
{
var exception = logEntry.Exception;
@ -204,11 +198,11 @@ file sealed class CustomFormatter() : ConsoleFormatter("custom"), ISupportExtern
textWriter.Write(Environment.NewLine);
}
WriteMessage(textWriter, message, singleLine);
WriteMessage(textWriter, message, singleLine, prefix);
if (exception != null)
{
WriteMessage(textWriter, exception.ToString(), singleLine);
WriteMessage(textWriter, exception.ToString(), singleLine, prefix);
}
if (singleLine)
@ -217,7 +211,7 @@ file sealed class CustomFormatter() : ConsoleFormatter("custom"), ISupportExtern
}
}
private static void WriteMessage(TextWriter textWriter, string message, bool singleLine)
private static void WriteMessage(TextWriter textWriter, string message, bool singleLine, string? prefix)
{
if (string.IsNullOrEmpty(message)) return;
if (singleLine)
@ -227,7 +221,10 @@ file sealed class CustomFormatter() : ConsoleFormatter("custom"), ISupportExtern
}
else
{
textWriter.Write(MessagePadding);
textWriter.Write(prefix ?? "" + MessagePadding);
if (prefix != null)
WriteReplacing(textWriter, Environment.NewLine, Environment.NewLine + prefix + MessagePadding, message);
else
WriteReplacing(textWriter, Environment.NewLine, NewLineWithMessagePadding, message);
textWriter.Write(Environment.NewLine);
}
@ -256,6 +253,20 @@ file sealed class CustomFormatter() : ConsoleFormatter("custom"), ISupportExtern
};
}
private static string GetSyslogSeverityIndicatorString(LogLevel logLevel)
{
return logLevel switch
{
LogLevel.Trace => "<7>",
LogLevel.Debug => "<7>",
LogLevel.Information => "<6>",
LogLevel.Warning => "<4>",
LogLevel.Error => "<3>",
LogLevel.Critical => "<2>",
_ => throw new ArgumentOutOfRangeException(nameof(logLevel))
};
}
private static ConsoleColors GetLogLevelConsoleColors(LogLevel logLevel)
{
if (!ConsoleUtils.EmitAnsiColorCodes)
@ -287,119 +298,4 @@ file sealed class CustomFormatter() : ConsoleFormatter("custom"), ISupportExtern
}
}
file sealed class CustomSystemdConsoleFormatter() : ConsoleFormatter("systemd-custom"), ISupportExternalScope
{
private static readonly string MessagePadding = new(' ', 6);
private IExternalScopeProvider? _scopeProvider;
public override void Write<TState>(
in LogEntry<TState> logEntry,
IExternalScopeProvider? scopeProvider,
TextWriter textWriter
)
{
var message = logEntry.Formatter(logEntry.State, logEntry.Exception);
// ReSharper disable once ConditionIsAlwaysTrueOrFalseAccordingToNullableAPIContract
if (logEntry.Exception == null && message == null) return;
var logLevel = logEntry.LogLevel;
var category = logEntry.Category + " " + Activity.Current?.TraceId;
var exception = logEntry.Exception;
var singleLine = !message.Contains('\n') && exception == null;
var syslogSeverityString = GetSyslogSeverityString(logLevel);
scopeProvider = _scopeProvider ?? scopeProvider;
Dictionary<string, string> scopes = [];
scopeProvider?.ForEachScope((p, _) =>
{
if (p is KeyValuePair<string, string> kvp)
scopes.Add(kvp.Key, kvp.Value);
else if (p is Tuple<string, string> tuple)
scopes.Add(tuple.Item1, tuple.Item2);
else if (p is (string key, string value))
scopes.Add(key, value);
else if (p is IEnumerable<KeyValuePair<string, object>> @enum)
foreach (var item in @enum.Where(e => e.Value is string))
scopes.Add(item.Key, (string)item.Value);
},
null as object);
var scope = scopes.GetValueOrDefault("JobId") ??
scopes.GetValueOrDefault("RequestId");
textWriter.Write(syslogSeverityString);
textWriter.Write('[');
textWriter.Write(scope ?? "core");
textWriter.Write(']');
textWriter.Write(' ');
textWriter.Write(category);
textWriter.Write(singleLine ? " >" : ":");
if (!string.IsNullOrEmpty(message))
WriteMessage(textWriter, message, logLevel, singleLine);
if (exception != null)
WriteMessage(textWriter, exception.ToString(), logLevel, singleLine);
}
private static void WriteMessage(TextWriter textWriter, string message, LogLevel logLevel, bool singleLine)
{
if (string.IsNullOrEmpty(message)) return;
if (singleLine)
{
textWriter.Write(' ');
WriteReplacing(textWriter, Environment.NewLine, " ", message);
}
else
{
var sev = GetSyslogSeverityIndicatorString(logLevel);
var prefix = Environment.NewLine + sev + MessagePadding;
textWriter.Write(prefix);
WriteReplacing(textWriter, Environment.NewLine, prefix, message);
}
textWriter.Write(Environment.NewLine);
return;
static void WriteReplacing(TextWriter writer, string oldValue, string newValue, string message)
{
var newMessage = message.Replace(oldValue, newValue);
writer.Write(newMessage);
}
}
private static string GetSyslogSeverityString(LogLevel logLevel)
{
return logLevel switch
{
LogLevel.Trace => "<7>trce: ",
LogLevel.Debug => "<7>dbug: ",
LogLevel.Information => "<6>info: ",
LogLevel.Warning => "<4>warn: ",
LogLevel.Error => "<3>fail: ",
LogLevel.Critical => "<2>crit: ",
_ => throw new ArgumentOutOfRangeException(nameof(logLevel))
};
}
private static string GetSyslogSeverityIndicatorString(LogLevel logLevel)
{
return logLevel switch
{
LogLevel.Trace => "<7>",
LogLevel.Debug => "<7>",
LogLevel.Information => "<6>",
LogLevel.Warning => "<4>",
LogLevel.Error => "<3>",
LogLevel.Critical => "<2>",
_ => throw new ArgumentOutOfRangeException(nameof(logLevel))
};
}
public void SetScopeProvider(IExternalScopeProvider scopeProvider)
{
_scopeProvider = scopeProvider;
}
}
#endregion