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Add samples mode #35

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Merged
vearutop merged 2 commits into from
Aug 6, 2026
Merged

Add samples mode #35

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1ad256c
Add samples mode
vearutop Aug 4, 2026
8b6a722
Add samples mode
vearutop Aug 6, 2026
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6 changes: 6 additions & 0 deletions cmd/catp/catp/app.go
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Original file line number Diff line number Diff line change
Expand Up @@ -109,6 +109,12 @@ func Main(options ...func(o *Options)) error { //nolint:funlen,cyclop,gocognit,g
flag.IntVar(&r.endLine, "end-line", 0, "stop printing lines at this line (exclusive),\n"+
"default is 0 (no limit), each input file is counted separately")

flag.IntVar(&r.samples, "samples", 0, "collect N evenly distributed sample lines per file instead of full output\n"+
"for uncompressed files, this seeks by byte offset, scanning forward only until a line passing\n"+
"-pass/-skip filters is found (immediately, if no filters are set), giving near-instant access to huge files\n"+
"for compressed (.gz/.zst) files this requires a full scan, roughly gated by bytes read so far\n"+
"(precision isn't guaranteed in either case)")

flag.Usage = func() {
fmt.Println("catp", version.Module("github.com/bool64/progress").Version+r.options.VersionLabel+",",
version.Info().GoVersion, strings.Join(versionExtra, " "))
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