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cmake_ninja_wrapper.py
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cmake_ninja_wrapper.py
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#!/usr/bin/python
import sys
import os
import subprocess
import re
import select
# ---------------------- Configuration section ------------------------------
REAL_CMAKE = "/usr/local/bin/cmake"
TRACING = False
# --------------------------- Code section ----------------------------------
def trace(message, argv=[]):
if not TRACING:
return
with open('/tmp/cmake_wrapper.log', 'a') as log:
if not argv == []:
log.write("\n\n")
log.write(message)
if not argv == []:
argv = '"%s"' % ('" "'.join(argv))
log.write("\n\n\t%s\n\tat: %s\n" % (argv, os.getcwd()))
def call_cmake(passing_args):
"""
Call real cmake as a subprocess passing it's output both to stdout and trace file.
:param passing_args:
:return:
"""
passing_args = [REAL_CMAKE] + passing_args
trace("Calling real cmake:", passing_args)
proc = subprocess.Popen(passing_args, stdout=subprocess.PIPE,
stderr=subprocess.PIPE, bufsize=0)
while True:
reads = [proc.stdout.fileno(), proc.stderr.fileno()]
ret = select.select(reads, [], [])
for fd in ret[0]:
if fd == proc.stdout.fileno():
line = proc.stdout.readline()
sys.stdout.write(line)
sys.stdout.flush()
trace(line)
if fd == proc.stderr.fileno():
line = proc.stderr.readline()
sys.stderr.write(line)
sys.stderr.flush()
trace(line)
if proc.poll() != None:
break
for line in proc.stdout:
sys.stdout.write(line)
trace(line)
for line in proc.stderr:
sys.stderr.write(line)
trace(line)
return proc.poll()
def is_real_project():
"""Detect if called inside clion private directory."""
cwd = os.getcwd()
return "clion" in cwd and "cmake" in cwd and "generated" in cwd
class CMakeCache(object):
"""CMake cache management utility"""
def __init__(self, path):
super(CMakeCache, self).__init__()
self.path = path
def alter(self, variable, value):
"""
Change a variable value in CMake cache.
TODO: Add variable if it doesn't already exist
"""
if not os.path.isfile(self.path):
return
with open(self.path, 'r') as cache_file:
cache_data = cache_file.read()
pattern = '%s=.*' % re.escape(variable)
replacement = '%s=%s' % (variable, value)
cache_data = re.sub(pattern, replacement, cache_data)
with open(self.path, 'w') as cache_file:
cache_file.write(cache_data)
def ninjafy(self):
self.alter('CMAKE_GENERATOR:INTERNAL', 'Ninja')
self.alter('CMAKE_MAKE_PROGRAM:FILEPATH', '/usr/bin/ninja')
def makefy(self):
self.alter('CMAKE_GENERATOR:INTERNAL', 'Unix Makefiles')
self.alter('CMAKE_MAKE_PROGRAM:FILEPATH', '/usr/bin/make')
def ninjafy_argv(original):
"""Replace Unix Makefiles generator with Ninja"""
processed = []
next_g = False
for a in original:
if a == '-G':
next_g = True
elif next_g and 'Unix Makefiles' in a:
a = a.replace('Unix Makefiles', 'Ninja')
processed.append(a)
return processed
trace('Originally called:', sys.argv)
# Enable wrapping logic only when called inside clion private directory.
if not is_real_project():
sys.exit(call_cmake(sys.argv[1:]))
# Check if generator argument was specified
if '-G' in sys.argv:
# Generate Makefile artifacts required by CLion
cache = CMakeCache('CMakeCache.txt')
cache.makefy()
exit_code = call_cmake(sys.argv[1:])
if exit_code != 0:
sys.exit(exit_code)
# Generate Ninja artifacts for actual build
passing_args = ninjafy_argv(sys.argv[1:])
cache.ninjafy()
sys.exit(call_cmake(passing_args))
else:
sys.exit(call_cmake(sys.argv[1:]))