local.go

     1  // Copyright 2023 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 gover
     6  
     7  import (
     8  	"internal/goversion"
     9  	"runtime"
    10  	"strconv"
    11  )
    12  
    13  // TestVersion is initialized in the go command test binary
    14  // to be $TESTGO_VERSION, to allow tests to override the
    15  // go command's idea of its own version as returned by Local.
    16  var TestVersion string
    17  
    18  // Local returns the local Go version, the one implemented by this go command.
    19  func Local() string {
    20  	v, _ := local()
    21  	return v
    22  }
    23  
    24  // LocalToolchain returns the local toolchain name, the one implemented by this go command.
    25  func LocalToolchain() string {
    26  	_, t := local()
    27  	return t
    28  }
    29  
    30  func local() (goVers, toolVers string) {
    31  	toolVers = runtime.Version()
    32  	if TestVersion != "" {
    33  		toolVers = TestVersion
    34  	}
    35  	goVers = FromToolchain(toolVers)
    36  	if goVers == "" {
    37  		// Development branch. Use "Dev" version with just 1.N, no rc1 or .0 suffix.
    38  		goVers = "1." + strconv.Itoa(goversion.Version)
    39  		toolVers = "go" + goVers
    40  	}
    41  	return goVers, toolVers
    42  }
    43
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