gamertan
b68fa2487d
Sanitized root snapshot from private source commit a72903c63e1753f9e6ffbf40453c0830bdfc05c5 and tree 295641e67eef5979da76746d8ae271249568263e. Private development history and workflows are excluded by the exact allowlist. AI-assisted: OpenAI Codex helped implement, test, and audit this preview. Signed-off-by: Cole Speelman <crspeelman@gmail.com>
33 lines
667 B
Go
33 lines
667 B
Go
//go:build linux
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// SPDX-License-Identifier: AGPL-3.0-only
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package deploy
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import (
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"errors"
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"os"
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"syscall"
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)
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type fileLock struct{ file *os.File }
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func acquireLock(path string) (*fileLock, error) {
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file, err := os.OpenFile(path, os.O_CREATE|os.O_RDWR, 0o600)
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if err != nil {
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return nil, err
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}
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if err := syscall.Flock(int(file.Fd()), syscall.LOCK_EX|syscall.LOCK_NB); err != nil {
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_ = file.Close()
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return nil, errors.New("deployment lock is held")
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}
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return &fileLock{file: file}, nil
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}
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func (l *fileLock) Close() error {
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if l == nil || l.file == nil {
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return nil
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}
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_ = syscall.Flock(int(l.file.Fd()), syscall.LOCK_UN)
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return l.file.Close()
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}
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