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# PYTHON_ARGCOMPLETE_OK
"""
Parse cmake help to generate certain input files
TODO(josh): `cmake --help-module-list` to get a list of builtin find-modules
that we can search for more commands.
TODO(josh): `cmake --help-commandplist` to get a list of builtin commands
that we can generate parsers for.
"""
from __future__ import print_function, unicode_literals
import argparse
import io
import logging
import os
import re
import subprocess
import sys
import jinja2
logger = logging.getLogger(__name__)
def get_abspath(relpath):
return os.path.abspath(os.path.join(os.path.dirname(__file__), relpath))
def sub_callback(match):
# NOTE(josh): it would be handly to use named groups in regular expressions,
# but since we use | to join them together into a big regex... the names
# will collide so we cannot
return "(?P<{}>.*)".format(re.sub(r"\W", "_", match.group(1)))
GENERIC_LABEL = re.compile(r"<([^>]+)>")
def make_pattern(namestr):
"""
Look for any generic labels within a cmake property or variable name
(e.g. `<LANG>` in `<LANG>_CPPLINT`) and convert the pattern string to a
regular expression pattern (e.g. `.*_CPPLINT`)
"""
return GENERIC_LABEL.sub(sub_callback, namestr)
def strip_named_groups(pattern):
return re.sub(r"\(?P<[\w_]>", "(", pattern)
def get_properties(args, jenv):
proc = subprocess.Popen(
[args.cmake, "--help-property-list"],
stdout=subprocess.PIPE)
with proc.stdout as infile:
properties = [line.decode("utf-8").strip() for line in infile]
patterns = [make_pattern(namestr) for namestr in properties]
proc.wait()
template = jenv.get_template("properties.jinja.py")
content = template.render(patterns=patterns)
if args.outfile == "-":
args.outfile = os.dup(sys.stdout.fileno())
with io.open(args.outfile, "w", encoding="utf-8") as outfile:
outfile.write(content)
outfile.write("\n")
def get_variables(args, jenv):
proc = subprocess.Popen(
[args.cmake, "--help-variable-list"],
stdout=subprocess.PIPE)
with proc.stdout as infile:
variables = [line.decode("utf-8").strip() for line in infile]
patterns = [make_pattern(namestr) for namestr in variables]
proc.wait()
template = jenv.get_template("variables.jinja.py")
content = template.render(patterns=patterns)
if args.outfile == "-":
args.outfile = os.dup(sys.stdout.fileno())
with io.open(args.outfile, "w", encoding="utf-8") as outfile:
outfile.write(content)
outfile.write("\n")
def get_command_list(args):
"""
Get a list of all the builtin cmake commands (statement names).
"""
proc = subprocess.Popen(
[args.cmake, "--help-command-list"],
stdout=subprocess.PIPE)
with proc.stdout as infile:
return [line.decode("utf-8").strip() for line in infile]
def get_command_help(args, command_name):
"""
Get the help string for a specific command
"""
proc = subprocess.Popen(
[args.cmake, "--help-command", command_name],
stdout=subprocess.PIPE)
with proc.stdout as infile:
return infile.read().decode("utf-8")
def get_usages(helpstr):
"""
Parse the command help string and return a list of command usage strings.
"""
usage = []
active = False
buf = ""
lineiter = iter(helpstr.split("\n"))
for line in lineiter:
if active:
if not line.strip():
active = False
usage.append(buf)
buf = ""
else:
buf += line.rstrip() + "\n"
elif line.strip() == "::":
next(lineiter, None)
active = True
if buf:
usage.append(buf)
return usage
def cmd_get_usages(args, jenv): # pylint: disable=W0613
for command_name in get_command_list(args):
helpstr = get_command_help(args, command_name)
for usage in get_usages(helpstr):
print(usage)
def cmd_print_deprecated(args, jenv): # pylint: disable=W0613
for command_name in get_command_list(args):
helpstr = get_command_help(args, command_name)
if "Deprecated" in helpstr:
print(command_name)
def setup_argparse(parser):
"""Setup argument parser"""
parser.add_argument(
"--cmake", default="cmake",
help="Cmake binary path or command. Default is `cmake`")
parser.add_argument(
"--outfile", default="-",
help="output file, default is stdout")
subparsers = parser.add_subparsers(dest="command")
subparsers.add_parser("properties")
subparsers.add_parser("variables")
subparsers.add_parser("usages")
subparsers.add_parser("deprecated")
def main():
parser = argparse.ArgumentParser(description=__doc__)
setup_argparse(parser)
try:
import argcomplete
argcomplete.autocomplete(parser)
except ImportError:
pass
args = parser.parse_args()
thisdir = os.path.abspath(os.path.dirname(__file__))
jenv = jinja2.Environment(
loader=jinja2.FileSystemLoader(thisdir)
)
if args.command == "properties":
get_properties(args, jenv)
elif args.command == "variables":
get_variables(args, jenv)
elif args.command == "usages":
cmd_get_usages(args, jenv)
elif args.command == "deprecated":
cmd_print_deprecated(args, jenv)
else:
logger.warning("Unknown command %s", args.command)
if __name__ == "__main__":
logging.basicConfig(level=logging.INFO)
main()
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