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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
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