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cmd/omitsize: fix the --features flag

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When you say --features=foo,bar, that was supposed to mean
to only show features "foo" and "bar" in the table.

But it was also being used as the set of all features that are
omittable, which was wrong, leading to misleading numbers
when --features was non-empty.

Updates #12614

Change-Id: Idad2fa67fb49c39454032e84a3dede967890fdf5
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2025-09-15 12:10:58 -07:00 committed by Brad Fitzpatrick
parent 4bb03609bc
commit 09dfd94613
1 changed files with 17 additions and 13 deletions
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30
cmd/omitsize/omitsize.go
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@ -31,12 +31,16 @@ func main() {
flag.Parse()
var all []string
if *features == "" {
for k := range featuretags.Features {
if k.IsOmittable() {
all = append(all, k.OmitTag())
}
var allOmittable []string
for k := range featuretags.Features {
if k.IsOmittable() {
allOmittable = append(allOmittable, k.OmitTag())
}
}
if *features == "" {
all = slices.Clone(allOmittable)
} else {
for v := range strings.SplitSeq(*features, ",") {
if !strings.HasPrefix(v, "ts_omit_") {
@ -49,15 +53,15 @@ func main() {
slices.Sort(all)
all = slices.Compact(all)
baseD := measure("tailscaled")
baseC := measure("tailscale")
baseBoth := measure("tailscaled", "ts_include_cli")
minD := measure("tailscaled", all...)
minC := measure("tailscale", all...)
minBoth := measure("tailscaled", append(slices.Clone(all), "ts_include_cli")...)
minD := measure("tailscaled", allOmittable...)
minC := measure("tailscale", allOmittable...)
minBoth := measure("tailscaled", append(slices.Clone(allOmittable), "ts_include_cli")...)
if *showRemovals {
baseD := measure("tailscaled")
baseC := measure("tailscale")
baseBoth := measure("tailscaled", "ts_include_cli")
fmt.Printf("Starting with everything and removing a feature...\n\n")
fmt.Printf("%9s %9s %9s\n", "tailscaled", "tailscale", "combined (linux/amd64)")
@ -80,7 +84,7 @@ func main() {
fmt.Printf("%9s %9s %9s\n", "tailscaled", "tailscale", "combined (linux/amd64)")
fmt.Printf("%9d %9d %9d omitting everything\n", minD, minC, minBoth)
for _, t := range all {
tags := allExcept(all, t)
tags := allExcept(allOmittable, t)
sizeD := measure("tailscaled", tags...)
sizeC := measure("tailscale", tags...)
sizeBoth := measure("tailscaled", append(tags, "ts_include_cli")...)