distr_info: add ID_LIKE support and small fixes

bin/distr_info

@@ -314,6 +314,9 @@ normalize_name()
         "ROSA Chrome Desktop")
             echo "ROSA"
             ;;
+        "MOS Desktop")
+            echo "ROSA"
+            ;;
         "ROSA Enterprise Linux Desktop")
             echo "RELS"
             ;;
@@ -372,6 +375,7 @@ if distro os-release ; then
     # set by os-release:
     #PRETTY_NAME
     VENDOR_ID="$ID"
+    [ -n "$ID_LIKE" ] && VENDOR_ID="$ID_LIKE"
     DISTRIB_FULL_RELEASE="$DISTRIB_RELEASE"
     DISTRIB_CODENAME="$VERSION_CODENAME"
 
@@ -420,14 +424,17 @@ case "$DISTRIB_ID" in
         echo "$VERSION" | grep -q "c9.* branch" && DISTRIB_RELEASE="c9"
         echo "$VERSION" | grep -q "c9f1 branch" && DISTRIB_RELEASE="c9f1"
         echo "$VERSION" | grep -q "c9f2 branch" && DISTRIB_RELEASE="c9f2"
+        echo "$VERSION" | grep -q "c9f3 branch" && DISTRIB_RELEASE="c9f3"
         DISTRIB_CODENAME="$DISTRIB_RELEASE"
         # FIXME: fast hack for fallback: 10.1 -> p10 for /etc/os-release
         if echo "$DISTRIB_RELEASE" | grep -q "^[0-9]" && echo "$DISTRIB_RELEASE" | grep -q -v "[0-9][0-9][0-9]"  ; then
-            DISTRIB_RELEASE="$(echo p$DISTRIB_RELEASE | sed -e 's|\..*||')"
-            DISTRIB_CODENAME="$DISTRIB_RELEASE"
+            DISTRIB_CODENAME="$(echo p$DISTRIB_RELEASE | sed -e 's|\..*||')"
+            # TODO: change p10 to 10
+            DISTRIB_RELEASE="$DISTRIB_CODENAME"
         fi
         ;;
     "ALTServer")
+        DISTRIB_ID="ALTLinux"
         DISTRIB_CODENAME="$(echo p$DISTRIB_RELEASE | sed -e 's|\..*||')"
         ;;
     "ALTSPWorkstation")
@@ -453,7 +460,7 @@ case "$DISTRIB_ID" in
         DISTRIB_RELEASE="Sisyphus"
         DISTRIB_CODENAME="$DISTRIB_RELEASE"
         ;;
-    "ROSA")
+    "ROSA"|"MOSDesktop")
         DISTRIB_FULL_RELEASE="$DISTRIB_CODENAME"
         DISTRIB_CODENAME="$DISTRIB_RELEASE"
         ;;

tests/etc/MOSDesktop/etc/os-release

+# Standard values
+# Specification: https://www.freedesktop.org/software/systemd/man/os-release.html
+NAME="MOS Desktop"
+ID=mos
+ID_LIKE=rosa
+PRETTY_NAME="MOS Desktop 12"
+CPE_NAME="cpe:/o:mos:rosa:2021.1"
+META_CLASS=desktop
+VARIANT_ID=mos-desktop
+ANSI_COLOR="1;43"
+VERSION="12"
+VERSION_ID=2021.1
+VERSION_CODENAME=12
+HOME_URL="http://os.mos.ru"
+LOGO=mos
+BUG_REPORT_URL="https://os.mos.ru/git"
+# ROSA-specific values
+ROSA_OS_BRANCH=mos
+ROSA_OS_PLATFORM="rosa2021.1"
+ROSA_OS_PLATFORM_INTEGER=202110
+ROSA_OS_TYPE=desktop
+ROSA_OS_VERSION=12