optimization: use eval distr_info --print-eepm-env instead of separated calls

bin/epm-sh-functions

@@ -104,17 +104,6 @@ echon()
 }
 
 
-# Used DISTRNAME
-set_target_pkg_env()
-{
-    [ -n "$DISTRNAME" ] || fatal "Missing DISTRNAME in set_target_pkg_env."
-    local ver="$DISTRVERSION"
-    [ -n "$ver" ] && ver="/$ver"
-    PKGFORMAT=$($DISTRVENDOR -p "$DISTRNAME$ver")
-    PKGVENDOR=$($DISTRVENDOR -s "$DISTRNAME$ver")
-    RPMVENDOR=$($DISTRVENDOR -n "$DISTRNAME$ver")
-}
-
 # Print command line and run command line
 showcmd()
 {
@@ -682,13 +671,14 @@ set_distro_info()
     [ -x $DISTRVENDOR ] || DISTRVENDOR=distro_info
     export DISTRVENDOR
 
-    [ -n "$DISTRNAME" ] || DISTRNAME=$($DISTRVENDOR -d) || fatal "Can't get distro name."
-    [ -n "$DISTRVERSION" ] || DISTRVERSION=$($DISTRVENDOR -v)
-    if [ -z "$DISTRARCH" ] ; then
-        DISTRARCH=$($DISTRVENDOR --distro-arch)
-    fi
-    DISTRCONTROL="$($DISTRVENDOR -y)"
-    [ -n "$BASEDISTRNAME" ] || BASEDISTRNAME=$($DISTRVENDOR -s)
+    # export pack of variables:
+    # BASEDISTRNAME
+    # DISTRNAME
+    # DISTRVERSION
+    # DISTRARCH
+    # DISTRCONTROL
+    # PMTYPE
+    eval $($DISTRVENDOR --print-eepm-env)
 
     [ -n "$TMPDIR" ] || TMPDIR="/tmp"
     # TODO: improve BIGTMPDIR conception
@@ -703,7 +693,6 @@ set_pm_type()
 {
     local CMD
     set_distro_info
-    set_target_pkg_env
 
 # override package manager detection result
 if [ -n "$EPM_BACKEND" ] ; then
@@ -716,7 +705,6 @@ if [ -n "$FORCEPM" ] ; then
     return
 fi
 
-    PMTYPE="$($DISTRVENDOR -g $DISTRNAME/$DISTRVERSION)"
 }
 
 is_active_systemd()

bin/serv

@@ -72,7 +72,6 @@ set_service_type()
     local CMD
 
     set_distro_info
-    set_target_pkg_env
 
 case "$DISTRCONTROL" in
     sysvinit)