OVMS3-idf/tools/cmake/convert_to_cmake.py
Roland Dobai 7f4b651434 tools: Make Unicode from subprocess result in the CMake convert script
Fixes an issue with Python 3 in MSYS where it fails while trying to join
paths where one part is Unicode (default string on Python3) and the
second part are bytes (returned by the subprocess call).

Closes https://github.com/espressif/esp-idf/issues/5189
2020-04-28 15:22:27 +02:00

205 lines
8 KiB
Python
Executable file

#!/usr/bin/env python
#
# Command line tool to convert simple ESP-IDF Makefile & component.mk files to
# CMakeLists.txt files
#
import argparse
import subprocess
import re
import os.path
import glob
debug = False
def get_make_variables(path, makefile="Makefile", expected_failure=False, variables={}):
"""
Given the path to a Makefile of some kind, return a dictionary of all variables defined in this Makefile
Uses 'make' to parse the Makefile syntax, so we don't have to!
Overrides IDF_PATH= to avoid recursively evaluating the entire project Makefile structure.
"""
variable_setters = [("%s=%s" % (k,v)) for (k,v) in variables.items()]
cmdline = ["make", "-rpn", "-C", path, "-f", makefile] + variable_setters
if debug:
print("Running %s..." % (" ".join(cmdline)))
p = subprocess.Popen(cmdline, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
(output, stderr) = p.communicate("\n")
if (not expected_failure) and p.returncode != 0:
raise RuntimeError("Unexpected make failure, result %d" % p.returncode)
if debug:
print("Make stdout:")
print(output)
print("Make stderr:")
print(stderr)
next_is_makefile = False # is the next line a makefile variable?
result = {}
BUILT_IN_VARS = set(["MAKEFILE_LIST", "SHELL", "CURDIR", "MAKEFLAGS"])
for line in output.decode('utf-8').split("\n"):
if line.startswith("# makefile"): # this line appears before any variable defined in the makefile itself
next_is_makefile = True
elif next_is_makefile:
next_is_makefile = False
m = re.match(r"(?P<var>[^ ]+) :?= (?P<val>.+)", line)
if m is not None:
if not m.group("var") in BUILT_IN_VARS:
result[m.group("var")] = m.group("val").strip()
return result
def get_component_variables(project_path, component_path):
make_vars = get_make_variables(component_path,
os.path.join(os.environ["IDF_PATH"],
"make",
"component_wrapper.mk"),
expected_failure=True,
variables={
"COMPONENT_MAKEFILE": os.path.join(component_path, "component.mk"),
"COMPONENT_NAME": os.path.basename(component_path),
"PROJECT_PATH": project_path,
})
if "COMPONENT_OBJS" in make_vars: # component.mk specifies list of object files
# Convert to sources
def find_src(obj):
obj = os.path.splitext(obj)[0]
for ext in ["c", "cpp", "S"]:
if os.path.exists(os.path.join(component_path, obj) + "." + ext):
return obj + "." + ext
print("WARNING: Can't find source file for component %s COMPONENT_OBJS %s" % (component_path, obj))
return None
srcs = []
for obj in make_vars["COMPONENT_OBJS"].split():
src = find_src(obj)
if src is not None:
srcs.append(src)
make_vars["COMPONENT_SRCS"] = " ".join(srcs)
else:
component_srcs = list()
for component_srcdir in make_vars.get("COMPONENT_SRCDIRS", ".").split():
component_srcdir_path = os.path.abspath(os.path.join(component_path, component_srcdir))
srcs = list()
srcs += glob.glob(os.path.join(component_srcdir_path, "*.[cS]"))
srcs += glob.glob(os.path.join(component_srcdir_path, "*.cpp"))
srcs = [('"%s"' % str(os.path.relpath(s, component_path))) for s in srcs]
make_vars["COMPONENT_ADD_INCLUDEDIRS"] = make_vars.get("COMPONENT_ADD_INCLUDEDIRS", "include")
component_srcs += srcs
make_vars["COMPONENT_SRCS"] = " ".join(component_srcs)
return make_vars
def convert_project(project_path):
if not os.path.exists(project_path):
raise RuntimeError("Project directory '%s' not found" % project_path)
if not os.path.exists(os.path.join(project_path, "Makefile")):
raise RuntimeError("Directory '%s' doesn't contain a project Makefile" % project_path)
project_cmakelists = os.path.join(project_path, "CMakeLists.txt")
if os.path.exists(project_cmakelists):
raise RuntimeError("This project already has a CMakeLists.txt file")
project_vars = get_make_variables(project_path, expected_failure=True)
if "PROJECT_NAME" not in project_vars:
raise RuntimeError("PROJECT_NAME does not appear to be defined in IDF project Makefile at %s" % project_path)
component_paths = project_vars["COMPONENT_PATHS"].split()
converted_components = 0
# Convert components as needed
for p in component_paths:
if "MSYSTEM" in os.environ:
cmd = ["cygpath", "-w", p]
p = subprocess.check_output(cmd).decode('utf-8').strip()
converted_components += convert_component(project_path, p)
project_name = project_vars["PROJECT_NAME"]
# Generate the project CMakeLists.txt file
with open(project_cmakelists, "w") as f:
f.write("""
# (Automatically converted from project Makefile by convert_to_cmake.py.)
# The following lines of boilerplate have to be in your project's CMakeLists
# in this exact order for cmake to work correctly
cmake_minimum_required(VERSION 3.5)
""")
f.write("""
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
""")
f.write("project(%s)\n" % project_name)
print("Converted project %s" % project_cmakelists)
if converted_components > 0:
print("Note: Newly created component CMakeLists.txt do not have any REQUIRES or PRIV_REQUIRES "
"lists to declare their component requirements. Builds may fail to include other "
"components' header files. If so requirements need to be added to the components' "
"CMakeLists.txt files. See the 'Component Requirements' section of the "
"Build System docs for more details.")
def convert_component(project_path, component_path):
if debug:
print("Converting %s..." % (component_path))
cmakelists_path = os.path.join(component_path, "CMakeLists.txt")
if os.path.exists(cmakelists_path):
print("Skipping already-converted component %s..." % cmakelists_path)
return 0
v = get_component_variables(project_path, component_path)
# Look up all the variables before we start writing the file, so it's not
# created if there's an erro
component_srcs = v.get("COMPONENT_SRCS", None)
component_add_includedirs = v["COMPONENT_ADD_INCLUDEDIRS"]
cflags = v.get("CFLAGS", None)
with open(cmakelists_path, "w") as f:
if component_srcs is not None:
f.write("idf_component_register(SRCS %s)\n" % component_srcs)
f.write(" INCLUDE_DIRS %s" % component_add_includedirs)
f.write(" # Edit following two lines to set component requirements (see docs)\n")
f.write(" REQUIRES "")\n")
f.write(" PRIV_REQUIRES "")\n\n")
else:
f.write("idf_component_register()\n")
if cflags is not None:
f.write("target_compile_options(${COMPONENT_LIB} PRIVATE %s)\n" % cflags)
print("Converted %s" % cmakelists_path)
return 1
def main():
global debug
parser = argparse.ArgumentParser(description='convert_to_cmake.py - ESP-IDF Project Makefile to CMakeLists.txt converter', prog='convert_to_cmake')
parser.add_argument('--debug', help='Display debugging output',
action='store_true')
parser.add_argument('project', help='Path to project to convert (defaults to CWD)', default=os.getcwd(), metavar='project path', nargs='?')
args = parser.parse_args()
debug = args.debug
print("Converting %s..." % args.project)
convert_project(args.project)
if __name__ == "__main__":
main()