1 files changed, 52 insertions, 0 deletions
diff --git a/vendor/github.com/tetratelabs/wazero/internal/version/version.go b/vendor/github.com/tetratelabs/wazero/internal/version/version.go
new file mode 100644
index 000000000..9261df0f7
--- /dev/null
+++ b/vendor/github.com/tetratelabs/wazero/internal/version/version.go
@@ -0,0 +1,52 @@
+package version
+
+import (
+	"runtime/debug"
+	"strings"
+)
+
+// Default is the default version value used when none was found.
+const Default = "dev"
+
+// version holds the current version from the go.mod of downstream users or set by ldflag for wazero CLI.
+var version string
+
+// GetWazeroVersion returns the current version of wazero either in the go.mod or set by ldflag for wazero CLI.
+//
+// If this is not CLI, this assumes that downstream users of wazero imports wazero as "github.com/tetratelabs/wazero".
+// To be precise, the returned string matches the require statement there.
+// For example, if the go.mod has "require github.com/tetratelabs/wazero 0.1.2-12314124-abcd",
+// then this returns "0.1.2-12314124-abcd".
+//
+// Note: this is tested in ./testdata/main_test.go with a separate go.mod to pretend as the wazero user.
+func GetWazeroVersion() (ret string) {
+	if len(version) != 0 {
+		return version
+	}
+
+	info, ok := debug.ReadBuildInfo()
+	if ok {
+		for _, dep := range info.Deps {
+			// Note: here's the assumption that wazero is imported as github.com/tetratelabs/wazero.
+			if strings.Contains(dep.Path, "github.com/tetratelabs/wazero") {
+				ret = dep.Version
+			}
+		}
+
+		// In wazero CLI, wazero is a main module, so we have to get the version info from info.Main.
+		if versionMissing(ret) {
+			ret = info.Main.Version
+		}
+	}
+	if versionMissing(ret) {
+		return Default // don't return parens
+	}
+
+	// Cache for the subsequent calls.
+	version = ret
+	return ret
+}
+
+func versionMissing(ret string) bool {
+	return ret == "" || ret == "(devel)" // pkg.go defaults to (devel)
+}