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900c12ce8d
* feat: add FileIO extension for file transfer abstraction Introduce extension/fileio package with Provider/FileIO/File interfaces and a global registry, following the same pattern as extension/credential. - Add LocalFileIO default implementation with path validation and atomic writes - Wire FileIOProvider into Factory and resolve at runtime via RuntimeContext.FileIO() - Factory holds Provider (not resolved instance), deferring resolution to execution time
32 lines
807 B
Go
32 lines
807 B
Go
// Copyright (c) 2026 Lark Technologies Pte. Ltd.
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// SPDX-License-Identifier: MIT
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package fileio
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import "sync"
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var (
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mu sync.Mutex
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provider Provider
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)
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// Register registers a FileIO Provider.
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// Later registrations override earlier ones (last-write-wins).
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// Unlike credential.Register which appends to a chain (multiple credential
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// sources are tried in order), FileIO uses a single active provider because
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// only one file I/O backend is active at a time (local vs server mode).
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// Typically called from init() via blank import.
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func Register(p Provider) {
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mu.Lock()
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defer mu.Unlock()
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provider = p
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}
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// GetProvider returns the currently registered Provider.
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// Returns nil if no provider has been registered.
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func GetProvider() Provider {
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mu.Lock()
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defer mu.Unlock()
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return provider
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}
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