feat: add deps-debian.sh (build-dep manifest + checker)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/lib/deps-debian.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+# Single source of truth for sethLabels build dependencies on Debian-family Linux.
+#
+# When SOURCED:   exposes SETHLABELS_DEPS array (no side effects).
+# When EXECUTED:  verifies each dep is installed; prints actionable
+#                 `sudo apt install ...` command on missing deps; exits 1.
+#                 On clean state, prints "All build dependencies present." and exits 0.
+#
+# Spec: sethlabels-docs/specs/2026-04-29-packaging-design.md §5.1
+set -euo pipefail
+
+SETHLABELS_DEPS=(
+  build-essential cmake ninja-build pkg-config
+  qt6-base-dev qt6-base-dev-tools
+  qt6-svg-dev
+  qt6-tools-dev qt6-tools-dev-tools
+  qt6-l10n-tools
+  libqt6printsupport6 libqt6svg6 libqt6widgets6 libqt6xml6 libqt6gui6
+  libqt6concurrent6 libqt6core6 libqt6test6
+  zlib1g-dev libqrencode-dev libzint-dev libgnubarcode-dev
+  file dpkg-dev fakeroot
+  wget
+  bats
+)
+
+# Detect sourced vs. executed.
+# When sourced: BASH_SOURCE[0] != $0
+# When executed: BASH_SOURCE[0] == $0
+if [ "${BASH_SOURCE[0]}" != "${0}" ]; then
+  return 0 2>/dev/null || exit 0
+fi
+
+# --- Executed path ---
+
+# Sanity check the build host
+if [ ! -f /etc/os-release ]; then
+  echo "WARNING: /etc/os-release missing; not Debian-family. This script is designed for Debian 13 / Ubuntu LTS." >&2
+fi
+
+if [ -f /etc/os-release ]; then
+  . /etc/os-release
+  if [[ "${ID:-}" != "debian" && "${ID:-}" != "ubuntu" ]] && [[ "${ID_LIKE:-}" != *debian* && "${ID_LIKE:-}" != *ubuntu* ]]; then
+    echo "WARNING: not running on Debian or Ubuntu (detected ID='${ID:-unknown}'). Build deps may differ." >&2
+  fi
+fi
+
+missing=()
+for pkg in "${SETHLABELS_DEPS[@]}"; do
+  if ! dpkg-query -W -f='${Status}' "$pkg" 2>/dev/null | grep -q "install ok installed"; then
+    missing+=("$pkg")
+  fi
+done
+
+if [ "${#missing[@]}" -gt 0 ]; then
+  echo "Missing build dependencies (${#missing[@]}):"
+  for p in "${missing[@]}"; do
+    echo "  - $p"
+  done
+  echo ""
+  echo "Install with:"
+  echo "  sudo apt install -y ${missing[*]}"
+  exit 1
+fi
+
+echo "All build dependencies present (${#SETHLABELS_DEPS[@]} packages verified)."

tests-impl/test-deps-debian.bats

@@ -0,0 +1,63 @@
+#!/usr/bin/env bats
+
+# Tests for scripts/lib/deps-debian.sh
+
+setup() {
+  REPO_ROOT="$(git rev-parse --show-toplevel)"
+  SCRIPT="$REPO_ROOT/scripts/lib/deps-debian.sh"
+}
+
+@test "script exists and is executable" {
+  [ -x "$SCRIPT" ]
+}
+
+@test "sourceable: exposes SETHLABELS_DEPS array" {
+  source "$SCRIPT"
+  [ "${#SETHLABELS_DEPS[@]}" -gt 5 ]
+}
+
+@test "SETHLABELS_DEPS contains core build tools" {
+  source "$SCRIPT"
+  [[ " ${SETHLABELS_DEPS[*]} " == *" cmake "* ]]
+  [[ " ${SETHLABELS_DEPS[*]} " == *" ninja-build "* ]]
+  [[ " ${SETHLABELS_DEPS[*]} " == *" build-essential "* ]]
+}
+
+@test "SETHLABELS_DEPS contains Qt6 libraries" {
+  source "$SCRIPT"
+  [[ " ${SETHLABELS_DEPS[*]} " == *" qt6-base-dev "* ]]
+  [[ " ${SETHLABELS_DEPS[*]} " == *" qt6-svg-dev "* ]]
+  [[ " ${SETHLABELS_DEPS[*]} " == *" qt6-tools-dev "* ]]
+}
+
+@test "SETHLABELS_DEPS contains barcode + zlib deps" {
+  source "$SCRIPT"
+  [[ " ${SETHLABELS_DEPS[*]} " == *" zlib1g-dev "* ]]
+  [[ " ${SETHLABELS_DEPS[*]} " == *" libqrencode-dev "* ]]
+  [[ " ${SETHLABELS_DEPS[*]} " == *" libzint-dev "* ]]
+}
+
+@test "SETHLABELS_DEPS contains packaging tools" {
+  source "$SCRIPT"
+  [[ " ${SETHLABELS_DEPS[*]} " == *" dpkg-dev "* ]]
+  [[ " ${SETHLABELS_DEPS[*]} " == *" fakeroot "* ]]
+  [[ " ${SETHLABELS_DEPS[*]} " == *" wget "* ]]
+}
+
+@test "executed: prints status and exits 0 (when all installed) OR 1 with apt-install hint" {
+  run "$SCRIPT"
+  if [ "$status" -eq 0 ]; then
+    [[ "$output" == *"All build dependencies present"* ]]
+  else
+    [[ "$output" == *"sudo apt install"* ]]
+  fi
+}
+
+@test "executed: warns if not on Debian/Ubuntu" {
+  # Simulate non-Debian by overriding /etc/os-release path via env var
+  if [ -f /etc/os-release ] && grep -qE '^ID=(debian|ubuntu)' /etc/os-release; then
+    skip "currently on Debian/Ubuntu — non-Debian path covered by source review"
+  fi
+  run "$SCRIPT"
+  [[ "$output" == *"Debian"* || "$output" == *"Ubuntu"* ]]
+}