Add check-themes, which tests themes via tests/themes/

It relies on tests/run.sh to handle failures.

CMakeLists.txt

@@ -405,6 +405,15 @@ add_custom_target(check-integration
     USES_TERMINAL
     VERBATIM)
 add_dependencies(check-integration test-gravity)
+add_custom_target(check-themes
+    ${CMAKE_SOURCE_DIR}/tests/themes/run.sh
+    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+    COMMENT "Testing themes"
+    USES_TERMINAL
+    DEPENDS generated_icons generate_awesomerc ${PROJECT_AWE_NAME}
+    VERBATIM)
+add_dependencies(check-integration check-themes)
+
 add_custom_target(check-requires
     lua "${CMAKE_SOURCE_DIR}/build-utils/check_for_invalid_requires.lua"
     WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}

tests/themes/run.sh

@@ -0,0 +1,31 @@
+#!/bin/sh
+#
+# Test all themes.
+# This should be run via `make check-themes` (or manually from the build
+# directory).
+
+set -e
+
+if ! [ -f CMakeCache.txt ]; then
+  echo 'This should be run from the build directory (expected CMakeCache.txt).' >&2
+  exit 64
+fi
+build_dir="$PWD"
+tests_dir="$(dirname -- "$0")/.."
+
+config_file="$build_dir/test-themes-awesomerc.lua"
+
+for theme in themes/*/theme.lua; do
+  echo "== Testing $theme =="
+  theme=${theme%/*}
+  theme=${theme##*/}
+
+  sed "s~default/theme~$theme/theme~g" "awesomerc.lua" > "$config_file"
+
+  # Set CMAKE_BINARY_DIR for out-of-tree builds.
+  CMAKE_BINARY_DIR="$PWD" \
+  AWESOME_RC_FILE="$config_file" \
+    AWESOME_THEMES_PATH="$PWD/themes" \
+    AWESOME_ICON_PATH="$PWD/icons" \
+    "$tests_dir/run.sh" themes/tests.lua
+done

tests/themes/tests.lua

@@ -0,0 +1,18 @@
+--- Simple script to load/test a theme.
+-- This is used from tests/themes/run.sh.
+
+local awful = require("awful")
+
+local steps = {
+    function(count)
+        if count <= 2 then
+            awful.spawn("xterm")
+        elseif #client.get() == 2 then
+            return true
+        end
+    end,
+}
+
+require("_runner").run_steps(steps)
+
+-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80