mirror of
https://github.com/apple/container.git
synced 2026-07-13 04:57:08 +00:00
J Logan
2b18fc5870
- Facilitates #507, #642. - Plumb logger with logger option access into every command. - StderrLogHandler allows logging to be enhanced for ANSI color mode for log levels, JSONL log output, replacing `--debug` with `--level level`. - Global logger is now just an Application.swift fileprivate only used for initial args processing. - Log with timestamp at debug and trace level. - Metadata output is crude at present; we can refine this in a follow-up.
77 lines
2.5 KiB
Swift
77 lines
2.5 KiB
Swift
//===----------------------------------------------------------------------===//
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// Copyright © 2025-2026 Apple Inc. and the container project authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//===----------------------------------------------------------------------===//
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import Foundation
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import Logging
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/// Basic log handler for where simple message output is needed,
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/// such as CLI commands.
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public struct StderrLogHandler: LogHandler {
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public var logLevel: Logger.Level = .info
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public var metadata: Logger.Metadata = [:]
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public subscript(metadataKey metadataKey: String) -> Logger.Metadata.Value? {
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get {
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self.metadata[metadataKey]
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}
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set {
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self.metadata[metadataKey] = newValue
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}
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}
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public init() {}
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public func log(
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level: Logger.Level,
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message: Logger.Message,
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metadata: Logger.Metadata?,
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source: String,
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file: String,
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function: String,
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line: UInt
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) {
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let data: Data
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switch logLevel {
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case .debug, .trace:
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let timestamp = ISO8601DateFormatter().string(from: Date())
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if let metadata, !metadata.isEmpty {
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data =
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"\(timestamp) \(message.description): \(metadata.description)"
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.data(using: .utf8) ?? Data()
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} else {
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data =
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"\(timestamp) \(message.description)"
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.data(using: .utf8) ?? Data()
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}
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default:
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if let metadata, !metadata.isEmpty {
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data =
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"\(message.description): \(metadata.description)"
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.data(using: .utf8) ?? Data()
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} else {
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data =
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message.description
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.data(using: .utf8) ?? Data()
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}
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}
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// Use a single write call for atomicity
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var output = data
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output.append("\n".data(using: .utf8)!)
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FileHandle.standardError.write(output)
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}
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}
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