/
convert_to_cmake.py
executable file
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/
convert_to_cmake.py
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#!/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()