upgrade: add support for epm upgrade TASK (upgrade only already installed packages)

bin/epm-sh-altlinux

@@ -122,3 +122,11 @@ tasknumber()
     isnumber "$num" && echo "$*"
 }
 
+# use assure apt-repo before
+get_task_packages()
+{
+    local tn
+    for tn in $(tasknumber "$@") ; do
+        docmd apt-repo list task "$tn"
+    done
+}

bin/epm-upgrade

@@ -30,6 +30,25 @@ epm_upgrade()
 	update_repo_if_needed
 
 	warmup_bases
+
+	if [ "$DISTRNAME" = "ALTLinux" ] ; then
+		load_helper epm-sh-altlinux
+		if tasknumber "$pkg_names" >/dev/null ; then
+			load_helper epm-addrepo
+			load_helper epm-removerepo
+			load_helper epm-Install
+			epm_addrepo
+			local installlist="$(get_task_packages $pkg_names)"
+			[ -n "$verbose" ] && info "Packages from task(s): $installlist"
+			# install only installed packages (simulate upgrade packages)
+			installlist="$(estrlist exclude "$(echo "$installlist" | (skip_installed='yes' filter_out_installed_packages))" "$installlist")"
+			[ -n "$verbose" ] && info "Packages to upgrade: $installlist"
+			(pkg_names="$installlist" epm_Install)
+			epm_removerepo
+			return
+		fi
+	fi
+
 	info "Running command for upgrade packages"
 
 	case $PMTYPE in
@@ -113,4 +132,5 @@ epm_upgrade()
 	esac
 
 	sudocmd $CMD $pkg_filenames
+
 }