72 lines
1.9 KiB
Go
72 lines
1.9 KiB
Go
//go:build windows
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// +build windows
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package util
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import (
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"fmt"
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"strconv"
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"strings"
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"golang.org/x/sys/windows/registry"
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)
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const legacyJavaRegPath = "SOFTWARE\\JavaSoft\\Java Runtime Environment"
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const jdkRegPath = "SOFTWARE\\JavaSoft\\JDK"
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func LocateJavaHome(component string, majorVersion int) (string, error) {
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if component == "jre-legacy" {
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jre, err := registry.OpenKey(registry.LOCAL_MACHINE, legacyJavaRegPath, registry.QUERY_VALUE)
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if err != nil {
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return "", err
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}
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curVer, _, err := jre.GetStringValue("CurrentVersion")
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if err != nil {
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return "", nil
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}
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mVer, err := strconv.ParseInt(strings.Split(curVer, ".")[1], 10, 64)
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if err != nil {
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return "", nil
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}
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if mVer < int64(majorVersion) {
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return "", fmt.Errorf("installed JRE version %s is older than allowed 1.%d", curVer, majorVersion)
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}
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jre, err = registry.OpenKey(registry.LOCAL_MACHINE, fmt.Sprintf("%s\\%s", legacyJavaRegPath, curVer), registry.QUERY_VALUE)
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if err != nil {
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return "", err
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}
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javaHome, _, err := jre.GetStringValue("JavaHome")
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if err != nil {
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return "", err
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}
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return javaHome, nil
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} else {
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jdk, err := registry.OpenKey(registry.LOCAL_MACHINE, jdkRegPath, registry.QUERY_VALUE)
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if err != nil {
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return "", err
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}
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curVer, _, err := jdk.GetStringValue("CurrentVersion")
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if err != nil {
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return "", nil
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}
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mVer, err := strconv.ParseInt(strings.Split(curVer, ".")[0], 10, 64)
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if err != nil {
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return "", nil
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}
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if mVer < int64(majorVersion) {
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return "", fmt.Errorf("installed JDK version %d is older than allowed %d", mVer, majorVersion)
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}
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jdk, err = registry.OpenKey(registry.LOCAL_MACHINE, fmt.Sprintf("%s\\%s", jdkRegPath, curVer), registry.QUERY_VALUE)
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if err != nil {
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return "", err
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}
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javaHome, _, err := jdk.GetStringValue("JavaHome")
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if err != nil {
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return "", err
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}
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return javaHome, nil
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}
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return "", nil
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}
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