mirror of
https://github.com/apple/container.git
synced 2026-10-12 17:19:13 +00:00
44 lines
1.8 KiB
Swift
44 lines
1.8 KiB
Swift
//===----------------------------------------------------------------------===//
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// Copyright © 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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extension ProgressBar {
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/// Makes sure the terminal cursor is visible again when the process exits,
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/// including when it is terminated by SIGINT or SIGTERM.
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///
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/// A progress bar hides the cursor while it renders, so a process that is
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/// killed mid-render would otherwise leave the user's terminal without one.
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/// Call this once at the start of `main()`. Handlers do not survive `exec`,
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/// so a plugin binary must call it itself.
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public static func restoreCursorAtExit() {
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let signalHandler: @convention(c) (Int32) -> Void = { signal in
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exit(signal + 128)
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}
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// Termination by Ctrl+C.
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signal(SIGINT, signalHandler)
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// Termination using `kill`.
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signal(SIGTERM, signalHandler)
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// Normal and explicit exit.
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atexit {
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if let progressConfig = try? ProgressConfig() {
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let progressBar = ProgressBar(config: progressConfig)
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progressBar.resetCursor()
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}
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}
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}
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}
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