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pybindmagic
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cmd line option links all cpp cells now

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master
Ugo Finnendahl 3 years ago
parent 7ecbba7ec2
commit f4c3781f7d
4 changed files with 241 additions and 83 deletions
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  1. 1
      .gitignore
  2. 38
      examples/main.py
  3. 66
      examples/test.ipynb
  4. 219
      pybindmagic/__init__.py

1
.gitignore vendored
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@ -5,3 +5,4 @@ pbm_modules
*.pyc
__pycache__
pybind11
*.egg-info

38
examples/main.py
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@ -1,4 +1,37 @@
import pybindmagic
#%%
%%cpp -f hello_world
void hello_world()
{
py::print("Hello World");
}
#%%
hello_world()
#%%
%%cpp -f callothercell -f callthiscell
void hello_world();
void callthiscell()
{
py::print("In this cell");
}
void callothercell()
{
py::print("From Other Cell:");
hello_world();
}
#%%
callthiscell()
callothercell()
#try to update the first cell an run callothercell() again
#%%
%%cpp -f generateMesh
#include <pybind11/eigen.h>
@ -82,13 +115,12 @@ defs
printMesh(*generateMesh())
#%%
%%cpp -c pathtocmake -f viewMeshh
%%cpp -c pathtocmake -f viewMesh
#include <igl/opengl/glfw/Viewer.h>
#include <pybind11/eigen.h>
void viewMeshh(Eigen::Matrix<double, Eigen::Dynamic, 3> V, Eigen::Matrix<int, Eigen::Dynamic, 3> F)
void viewMesh(Eigen::Matrix<double, Eigen::Dynamic, 3> V, Eigen::Matrix<int, Eigen::Dynamic, 3> F)
{
// Plot the mesh
igl::opengl::glfw::Viewer viewer;

66
examples/test.ipynb
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@ -9,6 +9,63 @@
"import pybindmagic"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": [
"%%cpp -f hello_world\n",
"\n",
"void hello_world()\n",
"{\n",
" py::print(\"Hello World\");\n",
"}"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": [
"hello_world()"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": [
"%%cpp -f callothercell -f callthiscell\n",
"\n",
"void hello_world();\n",
"\n",
"void callthiscell()\n",
"{\n",
" py::print(\"In this cell\");\n",
"}\n",
"\n",
"void callothercell()\n",
"{\n",
" py::print(\"From Other Cell:\");\n",
" hello_world();\n",
"}"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": [
"callthiscell()\n",
"\n",
"callothercell()\n",
"#try to update the first cell an run callothercell() again"
]
},
{
"cell_type": "code",
"execution_count": null,
@ -196,6 +253,13 @@
" ], dtype=np.int32)-1\n",
"viewMesh(V,F)"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
@ -218,7 +282,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.7.6"
"version": "3.8.3"
},
"latex_envs": {
"LaTeX_envs_menu_present": true,

219
pybindmagic/__init__.py
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@ -11,7 +11,9 @@ import subprocess
compiler_cmd = "c++"
cmd_flags = ["$(pkg-config --cflags eigen3)"]
optimize = "-O0"
cmd_flags = ["$(pkg-config --cflags eigen3)", "-Wall"]
template = """
#include <pybind11/pybind11.h>
@ -25,7 +27,7 @@ PYBIND11_MODULE({name}, m)
def_template = '\nm.def("{function}", &{function});\n'
tmp_path = "pbm_modules"
TMP_PATH = "pbm_modules"
# Make sure the correct python executeable is used using cmake
os.environ["PATH"] = os.path.dirname(sys.executable) + os.pathsep + os.environ["PATH"]
@ -42,9 +44,8 @@ def exec_command(cmd, cwd=None,**kwargs):
return True, e.output
def ensure_tmp_folder():
path = os.path.join(os.getcwd(), tmp_path)
path = os.path.join(os.getcwd(), TMP_PATH)
if not os.path.exists(path):
os.makedirs(path)
if not path in sys.path:
@ -67,120 +68,180 @@ def ensure_build_dir(path, clear=False):
os.makedirs(path)
return exists and not clear
@register_cell_magic
def cpp(line, cell, *what):
"""Compile, execute C++ code wrapped with pybind11 and import it"""
def parse_args(line):
args = line.split(" ")
rebuild = False
cmake_path = None
function = ""
run_cmake = False
ret = {}
ret["cmake_path"] = None
ret["functions"] = []
ret["rebuild"] = False
# TODO: Add full argument parser
for i,arg in enumerate(args):
if arg == "-c":
cmake_path = args[i+1].strip()
ret["cmake_path"] = args[i+1].strip()
if arg == "-f":
function = args[i+1].strip()
ret["functions"].append(args[i+1].strip())
if arg == "-rebuild":
rebuild = True
ret["rebuild"] = True
return ret
def get_CMakeLists(args):
CMakeLists = ""
if args["cmake_path"] is not None:
with open(os.path.join(args["cmake_path"],"CMakeLists.txt"), 'r') as f:
CMakeLists = f.read()
return CMakeLists
def cleanup(args, name, CMakeLists):
if args["cmake_path"] is not None:
with open(os.path.join(args["cmake_path"],"CMakeLists.txt"), 'w') as f:
f.write(CMakeLists)
if os.path.exists(os.path.join(args["path"],f"{name}.cpp")):
os.remove(os.path.join(args["path"],f"{name}.cpp"))
def get_gcc_cmd(name):
pyexe = sys.executable
return f"{compiler_cmd} {' '.join(cmd_flags)} {optimize} -std=c++11 -fPIC $({pyexe} -m pybind11 --includes) -c {TMP_PATH}/{name}.cpp -o {TMP_PATH}/{name}.o"
def get_linker_cmd(name):
others = " ".join([f"-l{os.path.basename(n)[3:-3]}" for n in sorted(glob.glob(f"{TMP_PATH}/*.so"), key=os.path.getmtime)[::-1]])
return f"{compiler_cmd} -Wl,-rpath {TMP_PATH} -shared {TMP_PATH}/{name}.o -o {TMP_PATH}/{name}.so -L{TMP_PATH} {others}"
def get_unique_linker_cmd(other_path, rnd_path):
# TODO: Merge with get_linker_cmd
other = os.path.basename(other_path)[:-2]
all_other = " ".join([f"-l{os.path.basename(n)[3:-3]}" for n in sorted(glob.glob(f"{TMP_PATH}/*.so"), key=os.path.getmtime)[::-1] if os.path.basename(n)[3:-3] != os.path.basename(other_path)[3:-2]])
return f"{compiler_cmd} -Wl,-rpath {TMP_PATH} -shared {TMP_PATH}/{other}.o -o {rnd_path}/{other}.so -L{TMP_PATH} {all_other}"
def import_to_ip(name):
# get a handle on the module
mdl = importlib.import_module(name)
# is there an __all__? if so respect it
if "__all__" in mdl.__dict__:
names = mdl.__dict__["__all__"]
else:
# otherwise we import all names that don't begin with _
names = [x for x in mdl.__dict__ if not x.startswith("_")]
get_ipython().push({k: getattr(mdl, k) for k in names})
# We first retrieve the current IPython interpreter
# instance.
@register_cell_magic
def cpp(line, cell, *what):
"""Compile, execute C++ code wrapped with pybind11 and import it"""
args = parse_args(line)
ip = get_ipython()
# get name of module
if args["cmake_path"] is None:
# TODO!
compile_id = get_gcc_cmd("dummy")
else:
compile_id = get_CMakeLists(args)
hash_object = hashlib.sha256((compile_id+"|"+line+"|"+cell).encode())
name = "libcpp_magic_"+hash_object.hexdigest()[:10]
run_cmake = False
cmake = ""
if cmake_path is not None:
with open(os.path.join(cmake_path,"CMakeLists.txt"), 'r') as f:
cmake = f.read()
# name = ''.join(random.choices(string.ascii_lowercase, k=10))
hash_object = hashlib.sha256((cmake+" ".join(line)+function+cell).encode())
name = "cpp_magic_"+hash_object.hexdigest()[:10]
if cmake_path is None:
# init temp folder and pybind etc
if args["cmake_path"] is None:
ensure_tmp_folder()
args["path"] = TMP_PATH
CMakeLists = None
else:
ensure_build_dir(cmake_path, clear=rebuild)
p = os.path.abspath(os.path.join(cmake_path,"build"))
run_cmake = not os.path.exists(os.path.join(p, "Makefile"))
ensure_build_dir(args["cmake_path"], clear=args["rebuild"])
p = os.path.abspath(os.path.join(args["cmake_path"],"build"))
if p not in sys.path:
sys.path.append(p)
ensure_pybind(cmake_path)
if cmake_path is not None:
path = cmake_path
else:
path = tmp_path
# We define the source and executable filenames.
run_cmake = not os.path.exists(os.path.join(p, "Makefile"))
ensure_pybind(args["cmake_path"])
args["path"] = args["cmake_path"]
CMakeLists = compile_id
build_needed = False
try:
if args["rebuild"]:
raise Exception()
mdl = importlib.import_module(name)
except:
build_needed = True
if build_needed:
try:
if rebuild:
raise Exception()
mdl = importlib.import_module(name)
except:
exe = sys.executable
# add pybind11 function defs
split = cell.split("defs")
if len(split) == 1 and function == "":
if len(split) == 1 and len(args["functions"]) == 0:
raise Exception("You have to name a function as argument ('%%cpp -f <functionname>') or manual set defs")
# make sure that split is at least length 2
split.append("")
curr_defs = split[1]
if function != "":
for function in args["functions"]:
curr_defs += def_template.format(function=function)
# We write the code to the C++ file.
with open(os.path.join(path,f"{name}.cpp"), 'w') as f:
with open(os.path.join(args["path"],f"{name}.cpp"), 'w') as f:
f.write(template.format(cell_code=split[0],name=name,defs="{"+curr_defs+"}"))
if cmake_path is None:
# We compile the C++ code into an executable.
command = f"{compiler_cmd} {' '.join(cmd_flags)} -O3 -Wall -shared -std=c++11 -fPIC $({exe} -m pybind11 --includes) {tmp_path}/{name}.cpp -o {tmp_path}/{name}.so"
if args["cmake_path"] is None:
# We compile the C++ code into an object file
command = get_gcc_cmd(name)
compile = ip.getoutput(command)
# currently warnings will lead to an abort
if len(compile) != 0:
raise Exception("\n".join(compile))
# link into a shared object
linker = get_linker_cmd(name)
link = ip.getoutput(linker)
if len(link) != 0:
raise Exception("\n".join(link))
# create unique folder
rnd = ''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(5))
rnd_path = os.path.join(TMP_PATH, rnd)
if not os.path.exists(rnd_path):
os.makedirs(rnd_path)
with open(os.path.join(rnd_path,"__init__.py"), 'w+') as f:
pass
# Rethink design decision: Maybe do not import all others again, maybe give cells names and reduce the amount of linking
# update all others by relinking and reimporting orderd by compilation time
for other_path in sorted(glob.glob(f"{TMP_PATH}/*.o"), key=os.path.getmtime):
other = os.path.basename(other_path)[:-2]
linker = get_unique_linker_cmd(other_path, rnd_path)
link = ip.getoutput(linker)
if len(link) != 0:
raise Exception("\n".join(link))
import_to_ip(f"{rnd}.{other}")
shutil.rmtree(rnd_path)
else:
with open(os.path.join(cmake_path,"CMakeLists.txt"), 'w') as f:
f.write(cmake.replace("{name}",name))
with open(os.path.join(args["cmake_path"],"CMakeLists.txt"), 'w') as f:
f.write(CMakeLists.replace("{name}",name))
# TODO: Add option to add cmake flags
if run_cmake:
command = ["cmake", ".."]
print("cmake:")
err, output = exec_command(command, cwd=os.path.join(cmake_path, "build"))
err, output = exec_command(command, cwd=os.path.join(args["cmake_path"], "build"))
if err:
raise Exception(output)
print(output)
command = ["make"]
print("make:")
err, output = exec_command(command, cwd=os.path.join(cmake_path, "build"))
err, output = exec_command(command, cwd=os.path.join(args["cmake_path"], "build"))
if err:
raise Exception(output)
print(output)
with open(os.path.join(cmake_path,"CMakeLists.txt"), 'w') as f:
f.write(cmake)
with open(os.path.join(args["cmake_path"],"CMakeLists.txt"), 'w') as f:
f.write(CMakeLists)
except Exception as e:
# clean up even if error occurs
cleanup(args, name, CMakeLists)
raise e
import_to_ip(name)
# We execute the executable and return the output.
# get a handle on the module
mdl = importlib.import_module(name)
if os.path.exists(os.path.join(path,f"{name}.cpp")):
os.remove(os.path.join(path,f"{name}.cpp"))
# is there an __all__? if so respect it
if "__all__" in mdl.__dict__:
names = mdl.__dict__["__all__"]
else:
# otherwise we import all names that don't begin with _
names = [x for x in mdl.__dict__ if not x.startswith("_")]
except Exception as e:
if cmake_path is not None:
with open(os.path.join(cmake_path,"CMakeLists.txt"), 'w') as f:
f.write(cmake)
if os.path.exists(os.path.join(path,f"{name}.cpp")):
os.remove(os.path.join(path,f"{name}.cpp"))
raise e
# now drag them in
ip.push({k: getattr(mdl, k) for k in names})
# clean up
cleanup(args, name, CMakeLists)

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