feat(scan): Support RHEL8 (#813)

* feat(scan): Support RHEL8

* fix(scan): check if `dnf-uils` is installed

scan/centos.go

@@ -47,15 +47,26 @@ func (o *centos) depsFast() []string {
 	if o.getServerInfo().Mode.IsOffline() {
 		return []string{}
 	}
+
 	// repoquery
-	return []string{"yum-utils"}
+	majorVersion, _ := o.Distro.MajorVersion()
+	if majorVersion < 8 {
+		return []string{"yum-utils"}
+	}
+	return []string{"dnf-utils"}
 }
 
 func (o *centos) depsFastRoot() []string {
-	return []string{
-		"yum-utils",
-		"yum-plugin-ps",
+	if o.getServerInfo().Mode.IsOffline() {
+		return []string{}
 	}
+
+	// repoquery
+	majorVersion, _ := o.Distro.MajorVersion()
+	if majorVersion < 8 {
+		return []string{"yum-utils"}
+	}
+	return []string{"dnf-utils"}
 }
 
 func (o *centos) depsDeep() []string {

scan/redhatbase.go

@@ -363,7 +363,11 @@ func (o *redhatBase) scanUpdatablePackages() (models.Packages, error) {
 		return nil, xerrors.Errorf("Failed to `yum makecache`: %w", err)
 	}
 
-	cmd := `repoquery --all --pkgnarrow=updates --qf="%{NAME} %{EPOCH} %{VERSION} %{RELEASE} %{REPO}"`
+	isDnf := o.exec(util.PrependProxyEnv(`repoquery --version | grep dnf`), o.sudo.repoquery()).isSuccess()
+	cmd := `repoquery --all --pkgnarrow=updates --qf='%{NAME} %{EPOCH} %{VERSION} %{RELEASE} %{REPO}'`
+	if isDnf {
+		cmd = `repoquery --upgrades --qf='%{NAME} %{EPOCH} %{VERSION} %{RELEASE} %{REPONAME}' -q`
+	}
 	for _, repo := range o.getServerInfo().Enablerepo {
 		cmd += " --enablerepo=" + repo
 	}

scan/rhel.go

@@ -53,7 +53,13 @@ func (o *rhel) depsFastRoot() []string {
 	if o.getServerInfo().Mode.IsOffline() {
 		return []string{}
 	}
-	return []string{"yum-utils"}
+
+	// repoquery
+	majorVersion, _ := o.Distro.MajorVersion()
+	if majorVersion < 8 {
+		return []string{"yum-utils"}
+	}
+	return []string{"dnf-utils"}
 }
 
 func (o *rhel) depsDeep() []string {