mirror of
https://github.com/apple/container.git
synced 2026-09-08 16:55:41 +00:00
117 lines
4.3 KiB
Swift
117 lines
4.3 KiB
Swift
//===----------------------------------------------------------------------===//
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// Copyright © 2025 Apple Inc. and the Containerization project authors. All rights reserved.
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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 Containerization
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import ContainerizationArchive
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import ContainerizationEXT4
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import ContainerizationError
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import ContainerizationOCI
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import ContainerizationOS
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import Foundation
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extension Application {
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struct Rootfs: AsyncParsableCommand {
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static let configuration = CommandConfiguration(
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commandName: "rootfs",
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abstract: "Manage the root filesystem for a container",
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subcommands: [
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Create.self
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]
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)
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struct Create: AsyncParsableCommand {
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@Option(name: .long, help: "Path to vminitd")
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var vminitd: String
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@Option(name: .long, help: "Path to vmexec")
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var vmexec: String
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@Option(name: .long, help: "Platform of the built binaries being packaged into the block")
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var platformString: String = Platform.current.description
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@Option(name: .long, help: "Labels to add to the built image of the form <key1>=<value1>, [<key2>=<value2>,...]")
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var labels: [String] = []
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@Argument var rootfsPath: String
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@Argument var tag: String
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private static let directories = [
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"bin",
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"sbin",
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"dev",
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"sys",
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"proc/self", // hack for swift init's booting
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"run",
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"tmp",
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"mnt",
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"var",
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]
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func run() async throws {
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try await writeArchive()
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let p = try Platform(from: platformString)
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let rootfs = URL(filePath: rootfsPath)
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let labels = Application.parseKeyValuePairs(from: labels)
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_ = try await InitImage.create(
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reference: tag, rootfs: rootfs,
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platform: p, labels: labels,
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imageStore: Application.imageStore,
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contentStore: Application.contentStore)
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}
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private func writeArchive() async throws {
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let writer = try ArchiveWriter(format: .pax, filter: .gzip, file: URL(filePath: rootfsPath))
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let ts = Date()
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let entry = WriteEntry()
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entry.permissions = 0o755
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entry.modificationDate = ts
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entry.creationDate = ts
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entry.group = 0
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entry.owner = 0
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entry.fileType = .directory
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// create the initial directory structure.
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for dir in Self.directories {
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entry.path = dir
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try writer.writeEntry(entry: entry, data: nil)
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}
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entry.fileType = .regular
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entry.path = "sbin/vminitd"
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var src = URL(fileURLWithPath: vminitd)
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var data = try Data(contentsOf: src)
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entry.size = Int64(data.count)
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try writer.writeEntry(entry: entry, data: data)
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src = URL(fileURLWithPath: vmexec)
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data = try Data(contentsOf: src)
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entry.path = "sbin/vmexec"
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entry.size = Int64(data.count)
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try writer.writeEntry(entry: entry, data: data)
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entry.fileType = .symbolicLink
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entry.path = "proc/self/exe"
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entry.symlinkTarget = "sbin/vminitd"
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entry.size = nil
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try writer.writeEntry(entry: entry, data: data)
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try writer.finishEncoding()
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}
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}
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}
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}
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