mirror of
https://github.com/apple/container.git
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J Logan
109 lines
3.9 KiB
Swift
109 lines
3.9 KiB
Swift
//===----------------------------------------------------------------------===//
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// Copyright © 2025 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 ArgumentParser
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import ContainerClient
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import ContainerPlugin
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import Darwin
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import Foundation
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struct DefaultCommand: AsyncParsableCommand {
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public static let configuration = CommandConfiguration(
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commandName: nil,
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shouldDisplay: false
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)
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@OptionGroup(visibility: .hidden)
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var global: Flags.Global
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@Argument(parsing: .captureForPassthrough)
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var remaining: [String] = []
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func run() async throws {
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// See if we have a possible plugin command.
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let pluginLoader = try? await Application.createPluginLoader()
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guard let command = remaining.first else {
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await Application.printModifiedHelpText(pluginLoader: pluginLoader)
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return
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}
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// Check for edge cases and unknown options to match the behavior in the absence of plugins.
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if command.isEmpty {
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throw ValidationError("Unknown argument '\(command)'")
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} else if command.starts(with: "-") {
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throw ValidationError("Unknown option '\(command)'")
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}
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// Compute canonical plugin directories to show in helpful errors (avoid hard-coded paths)
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let installRoot = CommandLine.executablePathUrl
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.deletingLastPathComponent()
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.appendingPathComponent("..")
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.standardized
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let userPluginsURL = PluginLoader.userPluginsDir(installRoot: installRoot)
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let installRootPluginsURL =
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installRoot
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.appendingPathComponent("libexec")
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.appendingPathComponent("container")
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.appendingPathComponent("plugins")
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.standardized
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let hintPaths = [userPluginsURL, installRootPluginsURL]
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.map { $0.appendingPathComponent(command).path(percentEncoded: false) }
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.joined(separator: "\n - ")
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// If plugin loader couldn't be created, the system/APIServer likely isn't running.
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if pluginLoader == nil {
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throw ValidationError(
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"""
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Plugins are unavailable. Start the container system services and retry:
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container system start
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Check to see that the plugin exists under:
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- \(hintPaths)
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"""
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)
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}
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guard let plugin = pluginLoader?.findPlugin(name: command), plugin.config.isCLI else {
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throw ValidationError(
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"""
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Plugin 'container-\(command)' not found.
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- If system services are not running, start them with: container system start
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- If the plugin isn't installed, ensure it exists under:
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Check to see that the plugin exists under:
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- \(hintPaths)
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"""
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)
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}
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// Before execing into the plugin, restore default SIGINT/SIGTERM so the plugin can manage signals.
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Self.resetSignalsForPluginExec()
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// Exec performs execvp (with no fork).
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try plugin.exec(args: remaining)
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}
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}
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extension DefaultCommand {
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// Exposed for tests to verify signal reset semantics.
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static func resetSignalsForPluginExec() {
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signal(SIGINT, SIG_DFL)
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signal(SIGTERM, SIG_DFL)
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}
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}
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