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7e016c1d90
Unused in this repo as of the earlier #6450 (300aba61a6)
and unused in the Windows GUI as of tailscale/corp#8065.
With this ipn.BackendServer is no longer used and could also be
removed from this repo. The macOS and iOS clients still temporarily
depend on it, but I can move it to that repo instead while and let its
migration proceed on its own schedule while we clean this repo up.
Updates #6417
Updates tailscale/corp#8051
Change-Id: Ie13f82af3eb9f96b3a21c56cdda51be31ddebdcf
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
42 lines
1.3 KiB
Go
42 lines
1.3 KiB
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ipn
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import (
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"context"
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"tailscale.com/envknob"
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"tailscale.com/version"
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)
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type readOnlyContextKey struct{}
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// IsReadonlyContext reports whether ctx is a read-only context, as currently used
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// by Unix non-root users running the "tailscale" CLI command. They can run "status",
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// but not much else.
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func IsReadonlyContext(ctx context.Context) bool {
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return ctx.Value(readOnlyContextKey{}) != nil
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}
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// ReadonlyContextOf returns ctx wrapped with a context value that
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// will make IsReadonlyContext reports true.
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func ReadonlyContextOf(ctx context.Context) context.Context {
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if IsReadonlyContext(ctx) {
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return ctx
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}
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return context.WithValue(ctx, readOnlyContextKey{}, readOnlyContextKey{})
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}
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// IPCVersion returns version.Long usually, unless TS_DEBUG_FAKE_IPC_VERSION is
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// set, in which it contains that value. This is only used for weird development
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// cases when testing mismatched versions and you want the client to act like it's
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// compatible with the server.
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func IPCVersion() string {
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if v := envknob.String("TS_DEBUG_FAKE_IPC_VERSION"); v != "" {
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return v
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}
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return version.Long
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}
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