260 lines
9.0 KiB
CMake
260 lines
9.0 KiB
CMake
# This module is designed to allow the Awesome documentation examples to be
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# tested.
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#
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# It shims enough of the Awesome C API to allow code to be executed without an
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# actual X server or running Awesome process. These tests are not genuine
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# integration tests, but they are the next best thing.
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#
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# As secondary goals, this module also generates images of the test result
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# where relevant. Those images are used by the documentation and help the
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# developers track user interface regressions and glitches. Finally, it also
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# helps to find broken code.
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cmake_minimum_required(VERSION 3.0.0)
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# Get and update the LUA_PATH so the scripts can be executed without Awesome.
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execute_process(COMMAND lua -e print\(package.path\) OUTPUT_VARIABLE "LUA_PATH_")
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# Add the main awesome lua libraries.
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set(LUA_PATH2_ "\
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${CMAKE_SOURCE_DIR}/lib/?.lua;\
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${CMAKE_SOURCE_DIR}/lib/?/init.lua;\
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${CMAKE_SOURCE_DIR}/lib/?;"
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)
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# Add the C API shims.
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set(LUA_PATH3_ "\
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${CMAKE_SOURCE_DIR}/tests/examples/shims/?.lua;\
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${CMAKE_SOURCE_DIR}/tests/examples/shims/?/init.lua;\
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${CMAKE_SOURCE_DIR}/tests/examples/shims/?;"
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)
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# Done in 3 variables to avoid CMake from implicitly converting into a list.
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set(ENV{LUA_PATH} "${LUA_PATH3_}${LUA_PATH2_}${LUA_PATH_}")
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# Unset environment variables that would get in the way of evaluating LUA_PATH.
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unset(ENV{LUA_PATH_5_1})
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unset(ENV{LUA_PATH_5_2})
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unset(ENV{LUA_PATH_5_3})
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# The documentation images directory.
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set(IMAGE_DIR "${CMAKE_BINARY_DIR}/doc/images")
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file(MAKE_DIRECTORY "${IMAGE_DIR}")
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# Escape potentially multiline strings to be part of the API doc.
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# * add "--" in front of each lines
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# * add a custom prefix in front of each lines
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# * drop empty lines
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# * convert " " lines into empty lines
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# * drop lines ending with "--DOC_SOMETHING", they are handled elsewhere
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function(escape_string variable content escaped_content line_prefix)
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# If DOC_HIDE_ALL is present, do nothing.
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if(variable MATCHES "--DOC_HIDE_ALL")
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return()
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endif()
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string(REGEX REPLACE "\n" ";" var_lines "${variable}")
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set(tmp_output ${content})
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foreach (LINE ${var_lines})
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if(NOT LINE MATCHES "^.+--DOC_[A-Z]+$")
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set(tmp_output ${tmp_output}\n--${line_prefix}${LINE})
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endif()
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endforeach()
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set(${escaped_content} ${tmp_output} PARENT_SCOPE)
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endfunction()
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# Extract lines with the --DOC_HEADER marker.
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function(extract_header variable pre_output post_output)
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string(REGEX REPLACE "\n" ";" var_lines "${variable}")
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set(IS_POST 0)
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foreach (LINE ${var_lines})
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# This function doesn't escape the lines, so make sure they are
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# already comments.
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if(LINE MATCHES "^--.*--DOC_HEADER")
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# Remove the header tag
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string(REGEX REPLACE "[ ]*--DOC_HEADER" "" LINE "${LINE}")
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# ldoc is picky about what happens after the first --@, so split
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# the output on that.
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if (NOT IS_POST AND LINE MATCHES "^--[ ]*@")
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set(IS_POST 1)
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endif()
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if (IS_POST)
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set(tmp_post_output ${tmp_post_output}\n${line_prefix}${LINE})
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else()
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set(tmp_pre_output ${tmp_pre_output}\n${line_prefix}${LINE})
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endif()
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endif()
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endforeach()
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set(${post_output} "${tmp_post_output}\n--" PARENT_SCOPE)
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set(${pre_output} "${tmp_pre_output}\n--" PARENT_SCOPE)
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endfunction()
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# Read a code file and convert it to ldoc usage example.
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# * add "--" in front of each lines
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# * drop empty lines
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# * convert " " lines into empty lines
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# * drop lines ending with "--DOC_HIDE"
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function(escape_code path escaped_content pre_header post_header)
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file(READ ${path} path)
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escape_string("${path}\n" "" escaped_code "")
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extract_header("${path}" example_pre_header example_post_header)
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set(${escaped_content} ${escaped_code} PARENT_SCOPE)
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set(${pre_header} ${example_pre_header} PARENT_SCOPE)
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set(${post_header} ${example_post_header} PARENT_SCOPE)
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endfunction()
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# Find the template.lua that is closest to the given file. For example, if a
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# template.lua is present in the same directory, its path will be returned. If
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# one is present in the parent directory, that path is returned etc.
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function(find_template result_variable file)
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get_filename_component(path "${file}" DIRECTORY)
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while(NOT EXISTS "${path}/template.lua")
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set(last_path "${path}")
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get_filename_component(path "${path}" DIRECTORY)
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if(last_path STREQUAL path)
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message(FATAL_ERROR "Failed to find template.lua for ${file}")
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endif()
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endwhile()
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set(${result_variable} "${path}/template.lua" PARENT_SCOPE)
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endfunction()
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# Get the namespace of a file.
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function(get_namespace result_variable file)
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get_filename_component(path "${file}" DIRECTORY)
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string(LENGTH "${SOURCE_DIR}/tests/examples" prefix_length)
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string(REPLACE "/" "_" namespace "${path}")
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string(SUBSTRING "${namespace}" "${prefix_length}" -1 namespace)
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set(${result_variable} "${namespace}" PARENT_SCOPE)
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endfunction()
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# Execute a Lua file.
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function(run_test test_path namespace escaped_content)
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find_template(template "${test_path}")
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# Get the file name without the extension.
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get_filename_component(${test_path} TEST_FILE_NAME NAME)
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set(IMAGE_PATH "${IMAGE_DIR}/AUTOGEN${namespace}_${TEST_FILE_NAME}")
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# Use the example testing as coverage source.
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if (USE_LCOV)
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set(LCOV_PATH ${SOURCE_DIR}/.luacov)
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endif()
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# Execute the script, leave the image extension decision to the test.
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# SVG is preferred, but PNG is better suited for some tests, like bitmap
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# patterns.
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execute_process(
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COMMAND lua ${template} ${test_path} ${IMAGE_PATH} ${LCOV_PATH}
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OUTPUT_VARIABLE TEST_OUTPUT
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ERROR_VARIABLE TEST_ERROR
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)
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# If there is something on stderr, exit.
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if (NOT TEST_ERROR STREQUAL "")
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message("${TEST_OUTPUT}")
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message("${TEST_ERROR}")
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if (STRICT_TESTS)
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message(FATAL_ERROR ${test_path} " An example test failed, aborting.")
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endif()
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endif()
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# Read the code and turn it into an usage example.
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escape_code(${test_path} TEST_CODE TEST_PRE_HEADER TEST_POST_HEADER)
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# Build the documentation.
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set(TEST_DOC_CONTENT "${TEST_PRE_HEADER}")
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# If the image has been created, then add it.
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if(EXISTS "${IMAGE_PATH}.svg")
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escape_string(
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"\n"
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"${TEST_DOC_CONTENT}" TEST_DOC_CONTENT ""
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)
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elseif(EXISTS "${IMAGE_PATH}.png")
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escape_string(
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"\n"
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"${TEST_DOC_CONTENT}" TEST_DOC_CONTENT ""
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)
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endif()
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# If there is an output, assume it is relevant and add it to the
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# documentation under the image.
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if(NOT ${TEST_OUTPUT} STREQUAL "")
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set(TEST_DOC_CONTENT
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"${TEST_DOC_CONTENT}\n--\n--**Usage example output**:\n--"
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)
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# Markdown requires an empty line before and after, and 4 spaces.
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escape_string(
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"\n${TEST_OUTPUT}"
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"${TEST_DOC_CONTENT}" TEST_DOC_CONTENT " "
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)
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set(TEST_DOC_CONTENT "${TEST_DOC_CONTENT}\n--")
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endif()
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# If there is some @* content, append it.
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set(TEST_DOC_CONTENT "${TEST_DOC_CONTENT}${TEST_POST_HEADER}")
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# Only add it if there is something to display.
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if(NOT ${TEST_CODE} STREQUAL "\n--")
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# Do not use the @usage tag, but 4 spaces.
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file(READ ${test_path} tmp_content)
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if(NOT tmp_content MATCHES "--DOC_NO_USAGE")
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set(DOC_PREFIX "@usage")
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endif()
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escape_string(
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" ${DOC_PREFIX}"
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"${TEST_DOC_CONTENT}" TEST_DOC_CONTENT ""
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)
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set(TEST_DOC_CONTENT "${TEST_DOC_CONTENT}${TEST_CODE}")
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endif()
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# Export the outout to the parent scope.
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set(${escaped_content} "${TEST_DOC_CONTENT}" PARENT_SCOPE)
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endfunction()
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# Find and run all test files.
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file(GLOB_RECURSE test_files LIST_DIRECTORIES false
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"${SOURCE_DIR}/tests/examples/*.lua")
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foreach(file ${test_files})
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if ((NOT "${file}" MATCHES ".*/shims/.*")
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AND (NOT "${file}" MATCHES ".*/template.lua"))
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file(RELATIVE_PATH relative_file "${SOURCE_DIR}" "${file}")
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message(STATUS "Running ${relative_file}...")
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# Get the file name without the extension.
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get_filename_component(TEST_FILE_NAME ${file} NAME_WE)
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get_namespace(namespace "${file}")
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run_test("${file}" "${namespace}" ESCAPED_CODE_EXAMPLE)
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# Set the test name.
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set(TEST_NAME DOC${namespace}_${TEST_FILE_NAME}_EXAMPLE)
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# Anything called @DOC_`namespace`_EXAMPLE@
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# in the Lua or C sources will be replaced by the content of that
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# variable during the pre-processing.
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# While at it, replace \" created by CMake by ',
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# " wont work in <code>.
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string(REPLACE "\"" "'" ${TEST_NAME} ${ESCAPED_CODE_EXAMPLE})
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endif()
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endforeach()
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message(STATUS "Example tests passed.")
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