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Diffstat (limited to 'python/makefile.py')
| -rw-r--r-- | python/makefile.py | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/python/makefile.py b/python/makefile.py new file mode 100644 index 0000000000..948d3f7391 --- /dev/null +++ b/python/makefile.py @@ -0,0 +1,122 @@ +#!/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 + + m = make_rule_re.match(line) + if m is None: + out_lines.append(line) + continue + + 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') |