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java_manager.go
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package pkg
import (
"fmt"
"os"
"os/exec"
"strings"
"github.com/hashicorp/go-version"
"github.com/samber/lo"
log "github.com/sirupsen/logrus"
"github.com/wttech/aemc/pkg/common/filex"
"github.com/wttech/aemc/pkg/common/httpx"
"github.com/wttech/aemc/pkg/common/osx"
"github.com/wttech/aemc/pkg/common/pathx"
"github.com/wttech/aemc/pkg/common/stringsx"
)
type JavaManager struct {
vendorManager *VendorManager
HomeDir string
DownloadURL string
DownloadURLReplacements map[string]string
VersionConstraints []string
}
func NewJavaManager(manager *VendorManager) *JavaManager {
cv := manager.aem.Config().Values()
return &JavaManager{
vendorManager: manager,
HomeDir: cv.GetString("vendor.java.home_dir"),
DownloadURL: cv.GetString("vendor.java.download.url"),
DownloadURLReplacements: cv.GetStringMapString("vendor.java.download.replacements"),
VersionConstraints: cv.GetStringSlice("vendor.java.version_constraints"),
}
}
type DownloadLock struct {
Source string `yaml:"source"`
}
func (jm *JavaManager) toolDir() string {
return fmt.Sprintf("%s/%s", jm.vendorManager.aem.baseOpts.ToolDir, "java")
}
func (jm *JavaManager) archiveDir() string {
return fmt.Sprintf("%s/%s", jm.toolDir(), "archive")
}
func (jm *JavaManager) downloadLock() osx.Lock[DownloadLock] {
return osx.NewLock(fmt.Sprintf("%s/lock/create.yml", jm.toolDir()), func() (DownloadLock, error) { return DownloadLock{Source: jm.DownloadURL}, nil })
}
func (jm *JavaManager) jdkDir() string {
return fmt.Sprintf("%s/%s", jm.toolDir(), "jdk")
}
func (jm *JavaManager) PrepareWithChanged() (bool, error) {
changed := false
if jm.HomeDir == "" && jm.DownloadURL != "" {
downloaded, err := jm.download()
changed = downloaded
if err != nil {
return downloaded, err
}
}
if err := jm.checkVersion(); err != nil {
return changed, err
}
return changed, nil
}
func (jm *JavaManager) download() (bool, error) {
lock := jm.downloadLock()
check, err := lock.State()
if err != nil {
return false, err
}
if check.UpToDate {
log.Debugf("existing JDK '%s' is up-to-date", check.Locked.Source)
return false, nil
}
log.Infof("preparing new JDK at dir '%s'", jm.jdkDir())
if err = jm.prepare(err); err != nil {
return false, err
}
if err := lock.Lock(); err != nil {
return false, err
}
log.Infof("prepared new JDK at dir '%s'", jm.jdkDir())
return true, nil
}
func (jm *JavaManager) prepare(err error) error {
if err := pathx.DeleteIfExists(jm.jdkDir()); err != nil {
return err
}
url := jm.DownloadURL
for search, replace := range jm.DownloadURLReplacements {
url = strings.ReplaceAll(url, search, replace)
}
archiveFile := fmt.Sprintf("%s/%s", jm.archiveDir(), httpx.FileNameFromURL(url))
log.Infof("downloading new JDK from URL '%s' to file '%s'", url, archiveFile)
if err := httpx.DownloadOnce(url, archiveFile); err != nil {
return err
}
log.Infof("downloaded new JDK from URL '%s' to file '%s'", url, archiveFile)
if _, err = filex.UnarchiveWithChanged(archiveFile, jm.jdkDir()); err != nil {
return err
}
return nil
}
func (jm *JavaManager) checkVersion() error {
currentVersion, err := jm.CurrentVersion()
if err != nil {
return err
}
if len(jm.VersionConstraints) == 0 {
return nil
}
for _, vc := range jm.VersionConstraints {
vco, err := version.NewConstraint(vc)
if err != nil {
return fmt.Errorf("java version constraint '%s' is invalid: %w", vc, err)
}
if vco.Check(currentVersion) {
return nil
}
}
return fmt.Errorf("java current version '%s' does not meet contraints '%s'", currentVersion, strings.Join(jm.VersionConstraints, " || "))
}
func (jm *JavaManager) FindHomeDir() (string, error) {
var homeDir string
if jm.HomeDir == "" {
files, err := os.ReadDir(jm.jdkDir())
if err != nil {
return "", err
}
var dir string
for _, file := range files {
if file.IsDir() && strings.HasPrefix(file.Name(), "jdk") {
dir = fmt.Sprintf("%s/%s", jm.jdkDir(), file.Name())
break
}
}
if dir == "" {
return "", fmt.Errorf("java home dir cannot be found in unarchived JDK contents under path '%s'", jm.archiveDir())
}
if err != nil {
return "", err
}
if osx.IsDarwin() {
homeDir = fmt.Sprintf("%s/Contents/Home", dir)
} else {
homeDir = dir
}
} else {
homeDir = jm.HomeDir
}
homeDir = pathx.Canonical(homeDir)
if !pathx.Exists(homeDir) {
return "", fmt.Errorf("java home dir does not exist at path '%s'", homeDir)
}
return homeDir, nil
}
func (jm *JavaManager) Executable() (string, error) {
homeDir, err := jm.FindHomeDir()
if err != nil {
return "", err
}
if osx.IsWindows() {
return pathx.Canonical(homeDir + "/bin/java.exe"), nil
}
return pathx.Canonical(homeDir + "/bin/java"), nil
}
func (jm *JavaManager) Env() ([]string, error) {
homeDir, err := jm.FindHomeDir()
if err != nil {
return nil, err
}
javaPath := pathx.Canonical(homeDir + "/bin")
envOthers := osx.EnvVarsWithout("PATH", "JAVA_HOME", "TERM")
envFinal := append([]string{
"PATH=" + javaPath + osx.PathVarSep() + os.Getenv("PATH"),
"JAVA_HOME=" + homeDir,
"TERM=xterm", // unpacking AEM jar requires this on some OSes
}, envOthers...)
return envFinal, nil
}
func (jm *JavaManager) Command(args ...string) (*exec.Cmd, error) {
executable, err := jm.Executable()
if err != nil {
return nil, err
}
cmd := exec.Command(executable, args...)
env, err := jm.Env()
if err != nil {
return nil, err
}
cmd.Env = env
return cmd, nil
}
func (jm *JavaManager) CurrentVersion() (*version.Version, error) {
currentText, err := jm.readCurrentVersion()
if err != nil {
return nil, err
}
current, err := version.NewVersion(currentText)
if err != nil {
return nil, fmt.Errorf("current java version '%s' cannot be parsed: %w", currentText, err)
}
return current, nil
}
func (jm *JavaManager) readCurrentVersion() (string, error) {
cmd, err := jm.Command("-version")
if err != nil {
return "", err
}
bytes, err := cmd.CombinedOutput()
output := string(bytes)
if err != nil {
log.Error(output)
return "", fmt.Errorf("cannot check java version properly: '%s': %w", output, err)
}
lines := strings.Split(output, "\n")
line, ok := lo.Find(lines, func(line string) bool { return strings.Contains(line, " version \"") })
if !ok {
return "", fmt.Errorf("cannot extract java version from output")
}
result := stringsx.Between(line, "\"", "\"")
result = strings.Split(result, "_")[0]
return strings.TrimSpace(result), nil
}