Generalize Debian distro CI packaging

scripts/lib/common.sh

@@ -2,13 +2,6 @@
 
 set -euo pipefail
 
-readonly REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
-readonly BUILD_CONFIG_FILE="${BUILD_CONFIG_FILE:-$REPO_ROOT/build.config}"
-readonly DEFAULT_GITEA_BASE_URL="https://git.cyber.gent"
-readonly DEFAULT_DEBIAN_DISTRIBUTION="noble"
-readonly DEFAULT_DEBIAN_COMPONENT="main"
-readonly DEFAULT_CI_WORK_ROOT="$REPO_ROOT/.ci-work"
-
 log() {
   printf '[%s] %s\n' "$(basename "$0")" "$*"
 }
@@ -18,6 +11,88 @@ die() {
   exit 1
 }
 
+detect_debian_distribution_id() {
+  local os_release="/etc/os-release"
+  local distro_id=""
+  local lsb_id=""
+
+  if [[ -r "$os_release" ]]; then
+    # shellcheck disable=SC1090
+    . "$os_release"
+    distro_id="${ID:-}"
+  fi
+
+  if [[ -n "$distro_id" ]]; then
+    case "$distro_id" in
+      ubuntu|debian)
+        printf '%s\n' "$distro_id"
+        return 0
+        ;;
+    esac
+  fi
+
+  if command -v lsb_release >/dev/null 2>&1; then
+    lsb_id="$(lsb_release -is | tr '[:upper:]' '[:lower:]')"
+    case "$lsb_id" in
+      ubuntu|debian)
+        printf '%s\n' "$lsb_id"
+        return 0
+        ;;
+    esac
+  fi
+
+  die "Unable to determine Debian/Ubuntu distribution ID from $os_release"
+}
+
+detect_debian_distribution() {
+  local os_release="/etc/os-release"
+  local distro_id=""
+  local version_codename=""
+  local ubuntu_codename=""
+
+  if [[ -r "$os_release" ]]; then
+    # shellcheck disable=SC1090
+    . "$os_release"
+    distro_id="${ID:-}"
+    version_codename="${VERSION_CODENAME:-}"
+    ubuntu_codename="${UBUNTU_CODENAME:-}"
+  fi
+
+  case "$distro_id" in
+    ubuntu)
+      if [[ -n "$ubuntu_codename" ]]; then
+        printf '%s\n' "$ubuntu_codename"
+        return 0
+      fi
+      ;;
+    debian)
+      if [[ -n "$version_codename" ]]; then
+        printf '%s\n' "$version_codename"
+        return 0
+      fi
+      ;;
+  esac
+
+  if [[ -n "$version_codename" ]]; then
+    printf '%s\n' "$version_codename"
+    return 0
+  fi
+
+  if command -v lsb_release >/dev/null 2>&1; then
+    lsb_release -cs
+    return 0
+  fi
+
+  die "Unable to determine Debian/Ubuntu distribution codename from $os_release"
+}
+
+readonly REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+readonly BUILD_CONFIG_FILE="${BUILD_CONFIG_FILE:-$REPO_ROOT/build.config}"
+readonly DEFAULT_GITEA_BASE_URL="https://git.cyber.gent"
+readonly DEFAULT_DEBIAN_DISTRIBUTION="$(detect_debian_distribution)"
+readonly DEFAULT_DEBIAN_COMPONENT="main"
+readonly DEFAULT_CI_WORK_ROOT="$REPO_ROOT/.ci-work"
+
 require_cmd() {
   command -v "$1" >/dev/null 2>&1 || die "Required command not found: $1"
 }