epm-epm_install: support mirrors

bin/epm-epm_install

@@ -20,6 +20,36 @@
 
 load_helper epm-install
 
+# copied from play.d/common.sh
+
+check_url_is_accessible()
+{
+    local res
+    epm tool eget --check "$1"
+}
+
+# update URL variable
+update_url_if_need_mirrored()
+{
+    local MIRROR="$1"
+    local SECONDURL
+    check_url_is_accessible "$URL" && return
+    if [ -n "$MIRROR" ] ; then
+        check_url_is_accessible "$MIRROR" && URL="$MIRROR"
+        return
+    fi
+
+    MIRROR="https://mirror.eterfund.ru"
+    SECONDURL="$(echo "$URL" | sed -e "s|^.*://|$MIRROR/|")"
+    check_url_is_accessible "$SECONDURL" && URL="$SECONDURL" && return
+
+    MIRROR="https://mirror.eterfund.org"
+    SECONDURL="$(echo "$URL" | sed -e "s|^.*://|$MIRROR/|")"
+    check_url_is_accessible "$SECONDURL" && URL="$SECONDURL" && return
+
+}
+
+
 __epm_korinf_site_mask() {
     local MASK="$1"
     local archprefix=""
@@ -27,7 +57,9 @@ __epm_korinf_site_mask() {
     rhas "$MASK" "[-_]" || MASK="$MASK[-_][0-9]"
     # set arch for Korinf compatibility
     [ "$($DISTRVENDOR -a)" = "x86_64" ] && archprefix="x86_64/"
-    echo "http://updates.etersoft.ru/pub/Korinf/$archprefix$($DISTRVENDOR -e)/$MASK*.$($DISTRVENDOR -p)"
+    URL="http://updates.etersoft.ru/pub/Korinf"
+    update_url_if_need_mirrored
+    echo "$URL/$archprefix$($DISTRVENDOR -e)/$MASK*.$($DISTRVENDOR -p)"
 }
 
 __epm_korinf_list() {