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envknob: add new package for all the strconv.ParseBool(os.Getenv(..))

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A new package can also later record/report which knobs are checked and
set. It also makes the code cleaner & easier to grep for env knobs.

Change-Id: Id8a123ab7539f1fadbd27e0cbeac79c2e4f09751
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2022-01-24 10:52:57 -08:00
committed by Brad Fitzpatrick
parent 6feb8f4c51
commit 41fd4eab5c
39 changed files with 195 additions and 128 deletions
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5
control/controlclient/map.go
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@@ -6,11 +6,10 @@ package controlclient
import (
"log"
"os"
"sort"
"strconv"
"inet.af/netaddr"
"tailscale.com/envknob"
"tailscale.com/tailcfg"
"tailscale.com/types/key"
"tailscale.com/types/logger"
@@ -289,7 +288,7 @@ func cloneNodes(v1 []*tailcfg.Node) []*tailcfg.Node {
return v2
}
var debugSelfIPv6Only, _ = strconv.ParseBool(os.Getenv("TS_DEBUG_SELF_V6_ONLY"))
var debugSelfIPv6Only = envknob.Bool("TS_DEBUG_SELF_V6_ONLY")
func filterSelfAddresses(in []netaddr.IPPrefix) (ret []netaddr.IPPrefix) {
switch {