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Use dependency mapping when doing incremental builds

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Kovid Goyal 2017-09-30 12:18:08 +05:30
parent b5b9a7ba6d
commit af99c172fe
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 23 additions and 2 deletions
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25
setup.py
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@ -209,6 +209,27 @@ def newer(dest, *sources):
return False
def dependecies_for(src, obj, all_headers):
dep_file = obj.rpartition('.')[0] + '.d'
try:
deps = open(dep_file).read().splitlines()
except FileNotFoundError:
yield src
yield from iter(all_headers)
else:
for line in deps:
if ':' in line:
continue
line = line.rstrip('\\')
parts = line.split(' ')
for part in parts:
part = part.strip()
if part:
path = os.path.abspath(part.strip())
if path.startswith(base):
yield path
def compile_c_extension(module, incremental, sources, headers):
prefix = os.path.basename(module)
objects = [
@ -223,8 +244,8 @@ def compile_c_extension(module, incremental, sources, headers):
cflgs.extend(map(define, defines))
src = os.path.join(base, src)
if not incremental or newer(dest, src, *headers):
run_tool([cc] + cflgs + ['-c', src] + ['-o', dest])
if not incremental or newer(dest, *dependecies_for(src, dest, headers)):
run_tool([cc, '-MMD'] + cflgs + ['-c', src] + ['-o', dest])
dest = os.path.join(base, module + '.so')
if not incremental or newer(dest, *objects):
run_tool([cc] + ldflags + objects + ldpaths + ['-o', dest])