github.com/shogo82148/std@v1.22.1-0.20240327122250-4e474527810c/cmd/internal/cov/covcmd/cmddefs.go (about)

     1  // Copyright 2022 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package covcmd
     6  
     7  // CoverPkgConfig is a bundle of information passed from the Go
     8  // command to the cover command during "go build -cover" runs. The
     9  // Go command creates and fills in a struct as below, then passes
    10  // file containing the encoded JSON for the struct to the "cover"
    11  // tool when instrumenting the source files in a Go package.
    12  type CoverPkgConfig struct {
    13  	// File into which cmd/cover should emit summary info
    14  	// when instrumentation is complete.
    15  	OutConfig string
    16  
    17  	// Import path for the package being instrumented.
    18  	PkgPath string
    19  
    20  	// Package name.
    21  	PkgName string
    22  
    23  	// Instrumentation granularity: one of "perfunc" or "perblock" (default)
    24  	Granularity string
    25  
    26  	// Module path for this package (empty if no go.mod in use)
    27  	ModulePath string
    28  
    29  	// Local mode indicates we're doing a coverage build or test of a
    30  	// package selected via local import path, e.g. "./..." or
    31  	// "./foo/bar" as opposed to a non-relative import path. See the
    32  	// corresponding field in cmd/go's PackageInternal struct for more
    33  	// info.
    34  	Local bool
    35  
    36  	// EmitMetaFile if non-empty is the path to which the cover tool should
    37  	// directly emit a coverage meta-data file for the package, if the
    38  	// package has any functions in it. The go command will pass in a value
    39  	// here if we've been asked to run "go test -cover" on a package that
    40  	// doesn't have any *_test.go files.
    41  	EmitMetaFile string
    42  }
    43  
    44  // CoverFixupConfig contains annotations/notes generated by the
    45  // cmd/cover tool (during instrumentation) to be passed on to the
    46  // compiler when the instrumented code is compiled. The cmd/cover tool
    47  // creates a struct of this type, JSON-encodes it, and emits the
    48  // result to a file, which the Go command then passes to the compiler
    49  // when the instrumented package is built.
    50  type CoverFixupConfig struct {
    51  	// Name of the variable (created by cmd/cover) containing the
    52  	// encoded meta-data for the package.
    53  	MetaVar string
    54  
    55  	// Length of the meta-data.
    56  	MetaLen int
    57  
    58  	// Hash computed by cmd/cover of the meta-data.
    59  	MetaHash string
    60  
    61  	// Instrumentation strategy. For now this is always set to
    62  	// "normal", but in the future we may add new values (for example,
    63  	// if panic paths are instrumented, or if the instrumenter
    64  	// eliminates redundant counters).
    65  	Strategy string
    66  
    67  	// Prefix assigned to the names of counter variables generated
    68  	// during instrumentation by cmd/cover.
    69  	CounterPrefix string
    70  
    71  	// Name chosen for the package ID variable generated during
    72  	// instrumentation.
    73  	PkgIdVar string
    74  
    75  	// Counter mode (e.g. set/count/atomic)
    76  	CounterMode string
    77  
    78  	// Counter granularity (perblock or perfunc).
    79  	CounterGranularity string
    80  }
    81  
    82  // MetaFileForPackage returns the expected name of the meta-data file
    83  // for the package whose import path is 'importPath' in cases where
    84  // we're using meta-data generated by the cover tool, as opposed to a
    85  // meta-data file created at runtime.
    86  func MetaFileForPackage(importPath string) string