estrai feat_add_lsb_release in file dedicato e migliora rilevamento distro

- nuovo featlib/lsb-release.sh con feat_add_lsb_release
- docker.sh importa lsb-release.sh
- logica robusta per DISTRIB_ID/DISTRIB_CODENAME con fallback multipli
- case-insensitive per LinuxMint/Ubuntu
- lsb-release installato on-demand solo se necessario

featlib/docker.sh

@@ -1,6 +1,8 @@
 #! /bin/bash --
 [ ! -z "${GREZZO_1577141523}" ] && return; GREZZO_1577141523=0
 
+. "$(this_script_path)/lsb-release.sh"
+
 function feat_addpacks_docker() {
 	if ! feat_missing "apt-get"; then
 		for pkg in docker.io docker-doc docker-compose podman-docker containerd runc; do sudo apt-get remove $pkg; done
@@ -10,30 +12,51 @@ function feat_addpacks_docker() {
 			sudo apt-get install \
 				ca-certificates \
 				curl \
-				gnupg \
+				gnupg
-				lsb-release
 			sudo install -m 0755 -d /etc/apt/keyrings
+			if [ -f /etc/lsb-release ]; then
 				. /etc/lsb-release
+			fi
+			if [ -f /etc/os-release ]; then
+				. /etc/os-release
+			fi
+			DISTRIB_ID="${DISTRIB_ID:-$ID}"
+			DISTRIB_CODENAME="${DISTRIB_CODENAME:-${UBUNTU_CODENAME:-$VERSION_CODENAME}}"
+			if [ -z "$DISTRIB_CODENAME" ]; then
+				feat_needed "lsb_release"
+				if [ -f /etc/lsb-release ]; then
+					. /etc/lsb-release
+				fi
+				DISTRIB_ID="${DISTRIB_ID:-$ID}"
+				DISTRIB_CODENAME="${DISTRIB_CODENAME:-${UBUNTU_CODENAME:-$VERSION_CODENAME}}"
+				if [ -z "$DISTRIB_CODENAME" ]; then
+					echo "Impossibile determinare DISTRIB_CODENAME (mancano /etc/lsb-release e /etc/os-release)" >&2
+					return 1
+				fi
+			fi
 			sudo rm -rf /etc/apt/keyrings/docker.gpg >/dev/null 2>&1
-            if [[ "$DISTRIB_ID" == "LinuxMint" ]]; then
+            if [[ "$DISTRIB_ID" == "LinuxMint" || "$DISTRIB_ID" == "linuxmint" ]]; then
+				if [ -f /etc/upstream-release/lsb-release ]; then
 					. /etc/upstream-release/lsb-release
+					DISTRIB_CODENAME="${DISTRIB_CODENAME:-${UBUNTU_CODENAME:-$VERSION_CODENAME}}"
+				fi
 				sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
 				sudo chmod a+r /etc/apt/keyrings/docker.asc
 			    echo \
                 "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
                 $DISTRIB_CODENAME stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
-            elif [[ "$DISTRIB_ID" == "Ubuntu" ]]; then
+            elif [[ "$DISTRIB_ID" == "Ubuntu" || "$DISTRIB_ID" == "ubuntu" ]]; then
 				sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
 				sudo chmod a+r /etc/apt/keyrings/docker.asc
 			    echo \
                 "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
-                $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+                $DISTRIB_CODENAME stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
             else
                 sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
 				sudo chmod a+r /etc/apt/keyrings/docker.asc
 			    echo \
                 "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
-                $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+                $DISTRIB_CODENAME stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
             fi			
             sudo apt-get update
 		fi

featlib/lsb-release.sh

@@ -0,0 +1,17 @@
+#! /bin/bash --
+[ ! -z "${GREZZO_1737747200}" ] && return; GREZZO_1737747200=0
+
+function feat_add_lsb_release() {
+	if ! feat_missing "apt-get"; then
+		sudo apt-get update
+		sudo apt-get install -y lsb-release
+	elif ! feat_missing "pacman"; then
+		sudo pacman -S --needed lsb-release
+	elif ! feat_missing "apk"; then
+		sudo apk add --no-cache lsb-release
+	elif ! feat_missing "yum"; then
+		sudo yum install -y redhat-lsb-core
+	elif ! feat_missing "zypper"; then
+		sudo zypper in lsb-release
+	fi
+}