github.com/tetratelabs/wazero@v1.7.3-0.20240513003603-48f702e154b5/internal/version/version.go (about)

     1  package version
     2  
     3  import (
     4  	"runtime/debug"
     5  	"strings"
     6  )
     7  
     8  // Default is the default version value used when none was found.
     9  const Default = "dev"
    10  
    11  // version holds the current version from the go.mod of downstream users or set by ldflag for wazero CLI.
    12  var version string
    13  
    14  // GetWazeroVersion returns the current version of wazero either in the go.mod or set by ldflag for wazero CLI.
    15  //
    16  // If this is not CLI, this assumes that downstream users of wazero imports wazero as "github.com/tetratelabs/wazero".
    17  // To be precise, the returned string matches the require statement there.
    18  // For example, if the go.mod has "require github.com/tetratelabs/wazero 0.1.2-12314124-abcd",
    19  // then this returns "0.1.2-12314124-abcd".
    20  //
    21  // Note: this is tested in ./testdata/main_test.go with a separate go.mod to pretend as the wazero user.
    22  func GetWazeroVersion() (ret string) {
    23  	if len(version) != 0 {
    24  		return version
    25  	}
    26  
    27  	info, ok := debug.ReadBuildInfo()
    28  	if ok {
    29  		for _, dep := range info.Deps {
    30  			// Note: here's the assumption that wazero is imported as github.com/tetratelabs/wazero.
    31  			if strings.Contains(dep.Path, "github.com/tetratelabs/wazero") {
    32  				ret = dep.Version
    33  			}
    34  		}
    35  
    36  		// In wazero CLI, wazero is a main module, so we have to get the version info from info.Main.
    37  		if versionMissing(ret) {
    38  			ret = info.Main.Version
    39  		}
    40  	}
    41  	if versionMissing(ret) {
    42  		return Default // don't return parens
    43  	}
    44  
    45  	// Cache for the subsequent calls.
    46  	version = ret
    47  	return ret
    48  }
    49  
    50  func versionMissing(ret string) bool {
    51  	return ret == "" || ret == "(devel)" // pkg.go defaults to (devel)
    52  }