epm repo add: add Alpine support

bin/epm-addrepo

@@ -341,6 +341,15 @@ __epm_addrepo_astra()
     return
 }
 
+__epm_addrepo_alpine()
+{
+    local repo="$1"
+    is_url "$repo" || fatal "Only URL is supported"
+    epm repo list --quiet | grep -q -F "$repo" && return 0
+
+    echo "$repo" | sudocmd tee -a /etc/apk/repositories
+}
+
 __epm_addrepo_deb()
 {
     assure_exists apt-add-repository software-properties-common
@@ -401,6 +410,10 @@ case $BASEDISTRNAME in
     "astra")
         __epm_addrepo_astra $repo
         return
+        ;;
+    "apk")
+        __epm_addrepo_alpine "$repo" || return
+        ;;
 esac
 
 case $PMTYPE in

bin/epm-repolist

@@ -127,6 +127,9 @@ case $PMTYPE in
     urpm-rpm)
         docmd urpmq --list-media active --list-url
         ;;
+    apk)
+        cat /etc/apk/repositories
+        ;;
     zypper-rpm)
         docmd zypper sl -d
         ;;