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#!/usr/bin/python3
#
# FRR extended automake/Makefile functionality helper
#
# This script is executed on/after generating Makefile to add some pieces for
# clippy.
import sys
import os
import subprocess
import re
import argparse
from string import Template
from makevars import MakeReVars
argp = argparse.ArgumentParser(description = 'FRR Makefile extensions')
argp.add_argument('--dev-build', action = 'store_const', const = True,
help = 'run additional developer checks')
args = argp.parse_args()
with open('Makefile', 'r') as fd:
before = fd.read()
mv = MakeReVars(before)
clippy_scan = mv['clippy_scan'].strip().split()
for clippy_file in clippy_scan:
assert clippy_file.endswith('.c')
# check for files using clippy but not listed in clippy_scan
if args.dev_build:
basepath = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
if os.path.exists(os.path.join(basepath, '.git')):
clippy_ref = subprocess.check_output([
'git', '-C', basepath, 'grep', '-l', '-P', '^#\s*include.*_clippy.c', '--', '**.c']).decode('US-ASCII')
clippy_ref = set(clippy_ref.splitlines())
missing = clippy_ref - set(clippy_scan)
if len(missing) > 0:
sys.stderr.write('error: files seem to be using clippy, but not listed in "clippy_scan" in subdir.am:\n\t%s\n' % ('\n\t'.join(sorted(missing))))
sys.exit(1)
clippydep = Template('''
${clippybase}.$$(OBJEXT): ${clippybase}_clippy.c
${clippybase}.lo: ${clippybase}_clippy.c
${clippybase}_clippy.c: $$(CLIPPY_DEPS)''')
clippyauxdep = Template('''# clippy{
# auxiliary clippy target
${target}: ${clippybase}_clippy.c
# }clippy''')
lines = before.splitlines()
autoderp = '#AUTODERP# '
out_lines = []
bcdeps = []
make_rule_re = re.compile('^([^:\s]+):\s*([^:\s]+)\s*($|\n)')
while lines:
line = lines.pop(0)
if line.startswith(autoderp):
line = line[len(autoderp):]
if line == '# clippy{':
while lines:
line = lines.pop(0)
if line == '# }clippy':
break
continue
if line.startswith('#'):
out_lines.append(line)
continue
full_line = line
full_lines = lines[:]
while full_line.endswith('\\'):
full_line = full_line[:-1] + full_lines.pop(0)
m = make_rule_re.match(full_line)
if m is None:
out_lines.append(line)
continue
line, lines = full_line, full_lines
target, dep = m.group(1), m.group(2)
if target.endswith('.lo') or target.endswith('.o'):
if not dep.endswith('.h'):
bcdeps.append('%s.bc: %s' % (target, target))
bcdeps.append('\t$(AM_V_LLVM_BC)$(COMPILE) -emit-llvm -c -o $@ %s' % (dep))
if m.group(2) in clippy_scan:
out_lines.append(clippyauxdep.substitute(target=m.group(1), clippybase=m.group(2)[:-2]))
out_lines.append(line)
out_lines.append('# clippy{\n# main clippy targets')
for clippy_file in clippy_scan:
out_lines.append(clippydep.substitute(clippybase = clippy_file[:-2]))
out_lines.append('')
out_lines.extend(bcdeps)
out_lines.append('')
bc_targets = []
for varname in ['bin_PROGRAMS', 'sbin_PROGRAMS', 'lib_LTLIBRARIES', 'module_LTLIBRARIES', 'noinst_LIBRARIES']:
bc_targets.extend(mv[varname].strip().split())
for target in bc_targets:
amtgt = target.replace('/', '_').replace('.', '_').replace('-', '_')
objs = mv[amtgt + '_OBJECTS'].strip().split()
objs = [obj + '.bc' for obj in objs]
deps = mv.get(amtgt + '_DEPENDENCIES', '').strip().split()
deps = [d + '.bc' for d in deps if d.endswith('.a')]
objs.extend(deps)
out_lines.append('%s.bc: %s' % (target, ' '.join(objs)))
out_lines.append('\t$(AM_V_LLVM_LD)$(LLVM_LINK) -o $@ $^')
out_lines.append('')
out_lines.append('# }clippy')
out_lines.append('')
after = '\n'.join(out_lines)
if after == before:
sys.exit(0)
with open('Makefile.pyout', 'w') as fd:
fd.write(after)
os.rename('Makefile.pyout', 'Makefile')
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