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cmd/tailscale/cli: make 'debug watch-ipn' play nice with jq

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jq doens't like non-json output in the json stream, and works more happily
when the input stream EOFs at some point. Move non-json words to stderr, and
add a parameter to stop watching and exit after some number of objects.

Updates #cleanup

Signed-off-by: David Anderson <danderson@tailscale.com>
This commit is contained in:
David Anderson 2023-11-18 14:29:02 -08:00 committed by Dave Anderson
parent c4855fe0ea
commit fd22145b52
1 changed files with 6 additions and 3 deletions
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9
cmd/tailscale/cli/debug.go
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@ -189,6 +189,7 @@
fs.BoolVar(&watchIPNArgs.netmap, "netmap", true, "include netmap in messages")
fs.BoolVar(&watchIPNArgs.initial, "initial", false, "include initial status")
fs.BoolVar(&watchIPNArgs.showPrivateKey, "show-private-key", false, "include node private key in printed netmap")
fs.IntVar(&watchIPNArgs.count, "count", 0, "exit after printing this many statuses, or 0 to keep going forever")
return fs
})(),
},
@ -416,6 +417,7 @@ func runPrefs(ctx context.Context, args []string) error {
netmap bool
initial bool
showPrivateKey bool
count int
}
func runWatchIPN(ctx context.Context, args []string) error {
@ -431,8 +433,8 @@ func runWatchIPN(ctx context.Context, args []string) error {
return err
}
defer watcher.Close()
printf("Connected.\n")
for {
fmt.Fprintf(os.Stderr, "Connected.\n")
for seen := 0; watchIPNArgs.count == 0 || seen < watchIPNArgs.count; seen++ {
n, err := watcher.Next()
if err != nil {
return err
@ -441,8 +443,9 @@ func runWatchIPN(ctx context.Context, args []string) error {
n.NetMap = nil
}
j, _ := json.MarshalIndent(n, "", "\t")
printf("%s\n", j)
fmt.Printf("%s\n", j)
}
return nil
}
func runDERPMap(ctx context.Context, args []string) error {