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Complete filesystem simplification workstream

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This commit is contained in:
Eric Rakestraw
2026-09-02 01:01:44 +00:00
parent 3c092fbe34
commit 9bb7c1f4e3
8 changed files with 26 additions and 35 deletions
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14
internal/fileops/fileops.go
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@@ -12,13 +12,9 @@ import (
"strings"
)
// ErrDirectorySyncUnsupported is used only by the retained directory-promotion
// implementation. Single-file replacement does not perform directory syncing.
var ErrDirectorySyncUnsupported = errors.New("directory sync is unsupported")
// ReplaceFileOptions describes the caller-owned parts of a byte-file
// replacement. The destination parent must already exist. BeforeRename runs
// after the temporary file is complete and durable, but before replacement is
// after the temporary file is complete, but before replacement is
// committed; callers can use it for cancellation or other commit checks.
type ReplaceFileOptions struct {
Mode os.FileMode
@@ -32,7 +28,7 @@ func ReplaceFileAtomic(dst string, data []byte, options ReplaceFileOptions) erro
}
// WriteFileAtomic creates the destination parent with workspace permissions
// and durably replaces dst with data. Callers that own parent-directory policy
// and atomically replaces dst with data. Callers that own parent-directory policy
// or need a pre-commit check should use ReplaceFileAtomic directly.
func WriteFileAtomic(dst string, data []byte, perm os.FileMode) error {
if strings.TrimSpace(dst) == "" {
@@ -44,13 +40,13 @@ func WriteFileAtomic(dst string, data []byte, perm os.FileMode) error {
return ReplaceFileAtomic(dst, data, ReplaceFileOptions{Mode: perm})
}
// CopyFileAtomic copies src to dst through the durable replacement sequence.
// CopyFileAtomic copies src to dst through the replacement sequence.
func CopyFileAtomic(src, dst string, perm os.FileMode) error {
_, err := CopyFileAtomicWithChecksum(src, dst, perm)
return err
}
// CopyFileAtomicWithChecksum copies src to dst through the durable replacement
// CopyFileAtomicWithChecksum copies src to dst through the replacement
// sequence and returns the SHA-256 checksum of the copied bytes.
func CopyFileAtomicWithChecksum(src, dst string, perm os.FileMode) (string, error) {
if strings.TrimSpace(src) == "" || strings.TrimSpace(dst) == "" {
@@ -66,7 +62,7 @@ func CopyFileAtomicWithChecksum(src, dst string, perm os.FileMode) (string, erro
return WriteReaderAtomicWithChecksum(dst, in, perm)
}
// WriteReaderAtomicWithChecksum streams src through the durable replacement
// WriteReaderAtomicWithChecksum streams src through the replacement
// sequence and returns the SHA-256 checksum of the installed bytes. The caller
// retains ownership of src.
func WriteReaderAtomicWithChecksum(dst string, src io.Reader, perm os.FileMode) (string, error) {