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// Copyright 2022 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. /* Covdata is a program for manipulating and generating reports from 2nd-generation coverage testing output files, those produced from running applications or integration tests. E.g. $ mkdir ./profiledir $ go build -cover -o myapp.exe . $ GOCOVERDIR=./profiledir ./myapp.exe <arguments> $ ls ./profiledir covcounters.cce1b350af34b6d0fb59cc1725f0ee27.821598.1663006712821344241 covmeta.cce1b350af34b6d0fb59cc1725f0ee27 $ Run covdata via "go tool covdata <mode>", where 'mode' is a subcommand selecting a specific reporting, merging, or data manipulation operation. Descriptions on the various modes (run "go tool cover <mode> -help" for specifics on usage of a given mode): 1. Report percent of statements covered in each profiled package $ go tool covdata percent -i=profiledir cov-example/p coverage: 41.1% of statements main coverage: 87.5% of statements $ 2. Report import paths of packages profiled $ go tool covdata pkglist -i=profiledir cov-example/p main $ 3. Report percent statements covered by function: $ go tool covdata func -i=profiledir cov-example/p/p.go:12: emptyFn 0.0% cov-example/p/p.go:32: Small 100.0% cov-example/p/p.go:47: Medium 90.9% ... $ 4. Convert coverage data to legacy textual format: $ go tool covdata textfmt -i=profiledir -o=cov.txt $ head cov.txt mode: set cov-example/p/p.go:12.22,13.2 0 0 cov-example/p/p.go:15.31,16.2 1 0 cov-example/p/p.go:16.3,18.3 0 0 cov-example/p/p.go:19.3,21.3 0 0 ... $ go tool cover -html=cov.txt $ 5. Merge profiles together: $ go tool covdata merge -i=indir1,indir2 -o=outdir -modpaths=github.com/go-delve/delve $ 6. Subtract one profile from another $ go tool covdata subtract -i=indir1,indir2 -o=outdir $ 7. Intersect profiles $ go tool covdata intersect -i=indir1,indir2 -o=outdir $ 8. Dump a profile for debugging purposes. $ go tool covdata debugdump -i=indir <human readable output> $ */ package main