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atomicfile: use ReplaceFile on Windows so that attributes and ACLs are preserved

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I moved the actual rename into separate, GOOS-specific files. On
non-Windows, we do a simple os.Rename. On Windows, we first try
ReplaceFile with a fallback to os.Rename if the target file does
not exist.

ReplaceFile is the recommended way to rename the file in this use case,
as it preserves attributes and ACLs set on the target file.

Updates #14428

Signed-off-by: Aaron Klotz <aaron@tailscale.com>
This commit is contained in:
Aaron Klotz
2025-01-13 13:02:47 -07:00
parent 3431ab1720
commit fcf90260ce
10 changed files with 261 additions and 7 deletions
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cmd/derper/depaware.txt
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@@ -85,7 +85,7 @@ tailscale.com/cmd/derper dependencies: (generated by github.com/tailscale/depawa
google.golang.org/protobuf/runtime/protoimpl from github.com/prometheus/client_model/go+
google.golang.org/protobuf/types/known/timestamppb from github.com/prometheus/client_golang/prometheus+
tailscale.com from tailscale.com/version
tailscale.com/atomicfile from tailscale.com/cmd/derper+
💣 tailscale.com/atomicfile from tailscale.com/cmd/derper+
tailscale.com/client/tailscale from tailscale.com/derp
tailscale.com/client/tailscale/apitype from tailscale.com/client/tailscale
tailscale.com/derp from tailscale.com/cmd/derper+