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# Copyright 2019 The Meson development team
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import annotations
from .. import mesonlib
from .. import mlog
from .common import cmake_is_debug
import typing as T
if T.TYPE_CHECKING:
from .traceparser import CMakeTraceParser, CMakeTarget
def parse_generator_expressions(
raw: str,
trace: 'CMakeTraceParser',
*,
context_tgt: T.Optional['CMakeTarget'] = None,
) -> str:
'''Parse CMake generator expressions
Most generator expressions are simply ignored for
simplicety, however some are required for some common
use cases.
'''
# Early abort if no generator expression present
if '$<' not in raw:
return raw
out = '' # type: str
i = 0 # type: int
def equal(arg: str) -> str:
col_pos = arg.find(',')
if col_pos < 0:
return '0'
else:
return '1' if arg[:col_pos] == arg[col_pos + 1:] else '0'
def vers_comp(op: str, arg: str) -> str:
col_pos = arg.find(',')
if col_pos < 0:
return '0'
else:
return '1' if mesonlib.version_compare(arg[:col_pos], '{}{}'.format(op, arg[col_pos + 1:])) else '0'
def target_property(arg: str) -> str:
# We can't really support this since we don't have any context
if ',' not in arg:
if context_tgt is None:
return ''
return ';'.join(context_tgt.properties.get(arg, []))
args = arg.split(',')
props = trace.targets[args[0]].properties.get(args[1], []) if args[0] in trace.targets else []
return ';'.join(props)
def target_file(arg: str) -> str:
if arg not in trace.targets:
mlog.warning(f"Unable to evaluate the cmake variable '$<TARGET_FILE:{arg}>'.")
return ''
tgt = trace.targets[arg]
cfgs = []
cfg = ''
if 'IMPORTED_CONFIGURATIONS' in tgt.properties:
cfgs = [x for x in tgt.properties['IMPORTED_CONFIGURATIONS'] if x]
cfg = cfgs[0]
if cmake_is_debug(trace.env):
if 'DEBUG' in cfgs:
cfg = 'DEBUG'
elif 'RELEASE' in cfgs:
cfg = 'RELEASE'
else:
if 'RELEASE' in cfgs:
cfg = 'RELEASE'
if f'IMPORTED_IMPLIB_{cfg}' in tgt.properties:
return ';'.join([x for x in tgt.properties[f'IMPORTED_IMPLIB_{cfg}'] if x])
elif 'IMPORTED_IMPLIB' in tgt.properties:
return ';'.join([x for x in tgt.properties['IMPORTED_IMPLIB'] if x])
elif f'IMPORTED_LOCATION_{cfg}' in tgt.properties:
return ';'.join([x for x in tgt.properties[f'IMPORTED_LOCATION_{cfg}'] if x])
elif 'IMPORTED_LOCATION' in tgt.properties:
return ';'.join([x for x in tgt.properties['IMPORTED_LOCATION'] if x])
return ''
supported = {
# Boolean functions
'BOOL': lambda x: '0' if x.upper() in {'0', 'FALSE', 'OFF', 'N', 'NO', 'IGNORE', 'NOTFOUND'} or x.endswith('-NOTFOUND') else '1',
'AND': lambda x: '1' if all(y == '1' for y in x.split(',')) else '0',
'OR': lambda x: '1' if any(y == '1' for y in x.split(',')) else '0',
'NOT': lambda x: '0' if x == '1' else '1',
'IF': lambda x: x.split(',')[1] if x.split(',')[0] == '1' else x.split(',')[2],
'0': lambda x: '',
'1': lambda x: x,
# String operations
'STREQUAL': equal,
'EQUAL': equal,
'VERSION_LESS': lambda x: vers_comp('<', x),
'VERSION_GREATER': lambda x: vers_comp('>', x),
'VERSION_EQUAL': lambda x: vers_comp('=', x),
'VERSION_LESS_EQUAL': lambda x: vers_comp('<=', x),
'VERSION_GREATER_EQUAL': lambda x: vers_comp('>=', x),
# String modification
'LOWER_CASE': lambda x: x.lower(),
'UPPER_CASE': lambda x: x.upper(),
# Always assume the BUILD_INTERFACE is valid.
# INSTALL_INTERFACE is always invalid for subprojects and
# it should also never appear in CMake config files, used
# for dependencies
'INSTALL_INTERFACE': lambda x: '',
'BUILD_INTERFACE': lambda x: x,
# Constants
'ANGLE-R': lambda x: '>',
'COMMA': lambda x: ',',
'SEMICOLON': lambda x: ';',
# Target related expressions
'TARGET_EXISTS': lambda x: '1' if x in trace.targets else '0',
'TARGET_NAME_IF_EXISTS': lambda x: x if x in trace.targets else '',
'TARGET_PROPERTY': target_property,
'TARGET_FILE': target_file,
} # type: T.Dict[str, T.Callable[[str], str]]
# Recursively evaluate generator expressions
def eval_generator_expressions() -> str:
nonlocal i
i += 2
func = '' # type: str
args = '' # type: str
res = '' # type: str
exp = '' # type: str
# Determine the body of the expression
while i < len(raw):
if raw[i] == '>':
# End of the generator expression
break
elif i < len(raw) - 1 and raw[i] == '$' and raw[i + 1] == '<':
# Nested generator expression
exp += eval_generator_expressions()
else:
# Generator expression body
exp += raw[i]
i += 1
# Split the expression into a function and arguments part
col_pos = exp.find(':')
if col_pos < 0:
func = exp
else:
func = exp[:col_pos]
args = exp[col_pos + 1:]
func = func.strip()
args = args.strip()
# Evaluate the function
if func in supported:
res = supported[func](args)
return res
while i < len(raw):
if i < len(raw) - 1 and raw[i] == '$' and raw[i + 1] == '<':
# Generator expression detected --> try resolving it
out += eval_generator_expressions()
else:
# Normal string, leave unchanged
out += raw[i]
i += 1
return out
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