build: trying to parse version info from header

CMakeLists.txt

@@ -1,4 +1,4 @@
-# Copyright (c) 2007 - 2023 Joseph Gaeddert
+# Copyright (c) 2007 - 2024 Joseph Gaeddert
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -31,6 +31,14 @@
 #
 
 cmake_minimum_required(VERSION 3.10)
+
+# run custom command to parse version number from include/liquid.h
+#execute_process(COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/scripts/version.sh
+#    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+#    OUTPUT_VARIABLE LIQUID_VERSION)
+
+# project definition
+#project(liquid VERSION ${LIQUID_VERSION} LANGUAGES C CXX)
 project(liquid VERSION 1.6.0 LANGUAGES C CXX)
 
 # require a C99 compiler for all targets
@@ -762,15 +770,16 @@ set_target_properties(${LIBNAME_PYTHON} PROPERTIES OUTPUT_NAME liquid)
 
 # enable python extensions to C++ classes
 target_compile_definitions(${LIBNAME_PYTHON} PUBLIC LIQUID_PYTHONLIB)
-# pull version info from pyproject.toml
+# pull version info from top of this file
 target_compile_definitions(${LIBNAME_PYTHON} PRIVATE VERSION_INFO="${liquid_VERSION}")
 
 install(TARGETS ${LIBNAME_PYTHON} LIBRARY DESTINATION .)
 
+
 # dump a (sorted) list of cmake variables
-# get_cmake_property(_variableNames VARIABLES)
-# list (SORT _variableNames)
-# foreach (_variableName ${_variableNames})
-#     message(STATUS "${_variableName}=${${_variableName}}")
-# endforeach()
+get_cmake_property(_variableNames VARIABLES)
+list (SORT _variableNames)
+foreach (_variableName ${_variableNames})
+    message(STATUS "${_variableName}=${${_variableName}}")
+endforeach()
 

pyproject.toml

@@ -5,8 +5,8 @@ build-backend = "scikit_build_core.build"
 [project]
 name = "liquid-dsp"
 description = "software-defined radio digital signal processing library"
-version = "1.6.0"
-#dynamic = ["version"]
+#version = "1.6.0"
+dynamic = ["version"] # set automatically from cmake
 requires-python = ">= 3.7"
 authors = [{name = "Joseph D. Gaeddert", email = "[email protected]"}]
 dependencies = []
@@ -32,8 +32,28 @@ Repository = "https://github.com/jgaeddert/liquid-dsp"
 Issues = "https://github.com/jgaeddert/liquid-dsp/issues"
 Changelog = "https://github.com/jgaeddert/liquid-dsp/blob/master/CHANGELOG.md"
 
+[tool.scikit-build]
+cmake.verbose = true
+logging.level = "INFO"
+#metadata.version.provider = "scikit_build_core.metadata.setuptools_scm"
+#sdist.include = ["_version.py"]
 
 
+[tool.scikit-build.metadata.version]
+provider = "scikit_build_core.metadata.regex"
+input = "include/liquid.h"
+regex = '''(?sx)
+\#define \s+ LIQUID_VERSION_MAJOR \s+ (?P<major>\d+) .*?
+\#define \s+ LIQUID_VERSION_MINOR \s+ (?P<minor>\d+) .*?
+\#define \s+ LIQUID_VERSION_PATCH \s+ (?P<patch>\d+) .*?
+\#define \s+ LIQUID_VERSION_DEV   \s+ (?P<dev>\d+)   .*?
+'''
+result = "{major}.{minor}.{patch}dev{dev}"
+remove = "dev0"
+
+#[tool.setuptools_scm]  # Section required
+#write_to = "_version.py"
+
 #[project.scripts]
 #liquid = "liquid:main_cli"
 

scripts/version.sh

@@ -0,0 +1,55 @@
+#!/bin/sh
+
+# This script parses the global header and extracts the major.minor.patch version for
+# liquid-dsp and prints to the screen. This is a simplified version of:
+# https://github.com/tinyalsa/tinyalsa/blob/master/scripts/version.sh
+
+INCLUDE_FILE="include/liquid.h"
+
+# exit program with error
+die()
+{
+    echo "error: $@" 1>&2
+    exit 1
+}
+
+# check that file exists
+check_files()
+{
+    [ -f ${INCLUDE_FILE}   ] || die "No ${INCLUDE_FILE} found!";
+}
+
+# get a part of the version from the header, e.g. LIQUID_VERSION_MAJOR
+get_version_part()
+{
+    set -- "$1" "$(grep -m 1 "^#define\([ \t]*\)$1" ${INCLUDE_FILE} | sed 's/[^0-9]*//g')"
+
+    if [ -z "$2" ]; then
+        die "Could not get $1 from ${INCLUDE_FILE}"
+    fi
+
+    echo "$2"
+}
+
+# gets the complete version from the include file
+get_version()
+{
+    VERSION_MAJOR=$(get_version_part "LIQUID_VERSION_MAJOR")
+    VERSION_MINOR=$(get_version_part "LIQUID_VERSION_MINOR")
+    VERSION_PATCH=$(get_version_part "LIQUID_VERSION_PATCH")
+}
+
+print_version()
+{
+    printf "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}${LF}"
+    return 0
+}
+
+check_files
+get_version
+print_version "$2"
+exit $?
+
+# The script should never reach this place.
+die "Internal error. Please report this."
+