proper package manager detection

profile.d/packages.sh

@@ -34,9 +34,73 @@
 # * OF SUCH DAMAGE.
 # ------------------------------------------------------------------------------
 
+# ------------------------------------------------------------------------------
+# Detect the active package manager of the current distribution.
+# Detection is based on /etc/os-release (ID / ID_LIKE), then falls back to
+# checking available binaries in a fixed priority order.
+# Echoes one of: apt dnf yum zypper pacman apk portage xbps nix
+# Returns 1 if no known package manager could be identified.
+_get_pkgmgr()
+{
+    local distro_id="" distro_like=""
+    if [[ -r /etc/os-release ]]; then
+        # shellcheck disable=SC1091 
+        distro_id=$( . /etc/os-release 2>/dev/null; printf '%s' "${ID:-}" )
+        # shellcheck disable=SC1091
+        distro_like=$( . /etc/os-release 2>/dev/null; printf '%s' "${ID_LIKE:-}" )
+    fi
+
+    # Map distro IDs/families to a package manager.
+    # ID_LIKE is space-separated and may list multiple families.
+    local id
+    for id in $distro_id $distro_like; do
+        case "${id,,}" in
+            debian|ubuntu|linuxmint|raspbian|pop|kali|elementary|zorin|neon|parrot)
+                echo "apt"; return 0 ;;
+            fedora)
+                echo "dnf"; return 0 ;;
+            rhel|centos|rocky|almalinux|ol|scientific|amzn)
+                command -v dnf >/dev/null 2>&1 && { echo "dnf"; return 0; }
+                echo "yum"; return 0 ;;
+            opensuse*|sles|sled)
+                echo "zypper"; return 0 ;;
+            arch|manjaro|endeavouros|garuda|artix|cachyos)
+                echo "pacman"; return 0 ;;
+            alpine)
+                echo "apk"; return 0 ;;
+            gentoo)
+                echo "portage"; return 0 ;;
+            void)
+                echo "xbps"; return 0 ;;
+            nixos)
+                echo "nix"; return 0 ;;
+        esac
+    done
+
+    # Fallback: check for binaries in priority order.
+    local bin
+    for bin in apt-get dnf yum zypper pacman apk emerge xbps-install nix-env; do
+        command -v "$bin" >/dev/null 2>&1 && {
+            case "$bin" in
+                apt-get)      echo "apt"     ;;
+                emerge)       echo "portage" ;;
+                xbps-install) echo "xbps"    ;;
+                nix-env)      echo "nix"     ;;
+                *)            echo "$bin"    ;;
+            esac
+            return 0
+        }
+    done
+
+    return 1
+}
+export -f _get_pkgmgr
+# ------------------------------------------------------------------------------
+
+
 # ------------------------------------------------------------------------------
 # Look for a package within installed one
-# Usage: dpkgs <string>
+# Usage: pkgs <string>
 pkgs()
 {
     local ignore_case=${PKGS_DEFAULT_IGNORE_CASE:-0}
@@ -85,13 +149,28 @@ pkgs()
     local grep_opt=""
     (( ignore_case )) && grep_opt="-i"
 
-    command -v dpkg >/dev/null 2>&1 && local cmd="dpkg -l"
+    local pkgmgr
-    command -v rpm >/dev/null 2>&1 && local cmd="rpm -qa"
+    pkgmgr=$(_get_pkgmgr) || {
-    if [[ -z $cmd ]]; then
+        disp E "No usable package manager could be detected on this system."
-        disp E "No usable package manager seems avialable."
         return 2
-    fi
+    }
-    $cmd | grep "$grep_opt" "$pkg"
+
+    local -a list_cmd
+    case "$pkgmgr" in
+        apt) list_cmd=(dpkg-query -l) ;;
+        dnf|yum|zypper) list_cmd=(rpm -qa) ;;
+        pacman) list_cmd=(pacman -Q) ;;
+        apk) list_cmd=(apk list --installed) ;;
+        portage) list_cmd=(qlist -I) ;;
+        xbps) list_cmd=(xbps-query -l) ;;
+        nix) list_cmd=(nix-env -q) ;;
+        *)
+            disp E "Package manager '$pkgmgr' is not supported by pkgs."
+            return 2
+            ;;
+    esac
+
+    "${list_cmd[@]}" | grep ${grep_opt:+"$grep_opt"} "$pkg"
 }
 export -f pkgs
 # ------------------------------------------------------------------------------