| # Copyright (c) 2018 Open Source Foundries Limited. |
| # |
| # SPDX-License-Identifier: Apache-2.0 |
| '''Common definitions for building Zephyr applications with CMake. |
| |
| This provides some default settings and convenience wrappers for |
| building Zephyr applications needed by multiple commands. |
| |
| See build.py for the build command itself. |
| ''' |
| |
| from collections import OrderedDict |
| import os.path |
| import re |
| import subprocess |
| import shutil |
| import sys |
| |
| import packaging.version |
| from west import log |
| from west.util import quote_sh_list |
| |
| DEFAULT_CACHE = 'CMakeCache.txt' |
| |
| DEFAULT_CMAKE_GENERATOR = 'Ninja' |
| '''Name of the default CMake generator.''' |
| |
| |
| def run_cmake(args, cwd=None, capture_output=False, dry_run=False): |
| '''Run cmake to (re)generate a build system, a script, etc. |
| |
| :param args: arguments to pass to CMake |
| :param cwd: directory to run CMake in, cwd is default |
| :param capture_output: if True, the output is returned instead of being |
| displayed (None is returned by default, or if |
| dry_run is also True) |
| :param dry_run: don't actually execute the command, just print what |
| would have been run |
| |
| If capture_output is set to True, returns the output of the command instead |
| of displaying it on stdout/stderr..''' |
| cmake = shutil.which('cmake') |
| if cmake is None and not dry_run: |
| log.die('CMake is not installed or cannot be found; cannot build.') |
| _ensure_min_version(cmake, dry_run) |
| |
| cmd = [cmake] + args |
| kwargs = dict() |
| if capture_output: |
| kwargs['stdout'] = subprocess.PIPE |
| # CMake sends the output of message() to stderr unless it's STATUS |
| kwargs['stderr'] = subprocess.STDOUT |
| if cwd: |
| kwargs['cwd'] = cwd |
| |
| if dry_run: |
| in_cwd = ' (in {})'.format(cwd) if cwd else '' |
| log.inf('Dry run{}:'.format(in_cwd), quote_sh_list(cmd)) |
| return None |
| |
| log.dbg('Running CMake:', quote_sh_list(cmd), level=log.VERBOSE_NORMAL) |
| p = subprocess.Popen(cmd, **kwargs) |
| out, _ = p.communicate() |
| if p.returncode == 0: |
| if out: |
| return out.decode(sys.getdefaultencoding()).splitlines() |
| else: |
| return None |
| else: |
| # A real error occurred, raise an exception |
| raise subprocess.CalledProcessError(p.returncode, p.args) |
| |
| |
| def run_build(build_directory, **kwargs): |
| '''Run cmake in build tool mode. |
| |
| :param build_directory: runs "cmake --build build_directory" |
| :param extra_args: optional kwarg. List of additional CMake arguments; |
| these come after "--build <build_directory>" |
| on the command line. |
| |
| Any additional keyword arguments are passed as-is to run_cmake(). |
| ''' |
| extra_args = kwargs.pop('extra_args', []) |
| return run_cmake(['--build', build_directory] + extra_args, **kwargs) |
| |
| |
| def make_c_identifier(string): |
| '''Make a C identifier from a string in the same way CMake does. |
| ''' |
| # The behavior of CMake's string(MAKE_C_IDENTIFIER ...) is not |
| # precisely documented. This behavior matches the test case |
| # that introduced the function: |
| # |
| # https://gitlab.kitware.com/cmake/cmake/commit/0ab50aea4c4d7099b339fb38b4459d0debbdbd85 |
| ret = [] |
| |
| alpha_under = re.compile('[A-Za-z_]') |
| alpha_num_under = re.compile('[A-Za-z0-9_]') |
| |
| if not alpha_under.match(string): |
| ret.append('_') |
| for c in string: |
| if alpha_num_under.match(c): |
| ret.append(c) |
| else: |
| ret.append('_') |
| |
| return ''.join(ret) |
| |
| |
| class CMakeCacheEntry: |
| '''Represents a CMake cache entry. |
| |
| This class understands the type system in a CMakeCache.txt, and |
| converts the following cache types to Python types: |
| |
| Cache Type Python type |
| ---------- ------------------------------------------- |
| FILEPATH str |
| PATH str |
| STRING str OR list of str (if ';' is in the value) |
| BOOL bool |
| INTERNAL str OR list of str (if ';' is in the value) |
| ---------- ------------------------------------------- |
| ''' |
| |
| # Regular expression for a cache entry. |
| # |
| # CMake variable names can include escape characters, allowing a |
| # wider set of names than is easy to match with a regular |
| # expression. To be permissive here, use a non-greedy match up to |
| # the first colon (':'). This breaks if the variable name has a |
| # colon inside, but it's good enough. |
| CACHE_ENTRY = re.compile( |
| r'''(?P<name>.*?) # name |
| :(?P<type>FILEPATH|PATH|STRING|BOOL|INTERNAL) # type |
| =(?P<value>.*) # value |
| ''', re.X) |
| |
| @classmethod |
| def _to_bool(cls, val): |
| # Convert a CMake BOOL string into a Python bool. |
| # |
| # "True if the constant is 1, ON, YES, TRUE, Y, or a |
| # non-zero number. False if the constant is 0, OFF, NO, |
| # FALSE, N, IGNORE, NOTFOUND, the empty string, or ends in |
| # the suffix -NOTFOUND. Named boolean constants are |
| # case-insensitive. If the argument is not one of these |
| # constants, it is treated as a variable." |
| # |
| # https://cmake.org/cmake/help/v3.0/command/if.html |
| val = val.upper() |
| if val in ('ON', 'YES', 'TRUE', 'Y'): |
| return True |
| elif val in ('OFF', 'NO', 'FALSE', 'N', 'IGNORE', 'NOTFOUND', ''): |
| return False |
| elif val.endswith('-NOTFOUND'): |
| return False |
| else: |
| try: |
| v = int(val) |
| return v != 0 |
| except ValueError as exc: |
| raise ValueError('invalid bool {}'.format(val)) from exc |
| |
| @classmethod |
| def from_line(cls, line, line_no): |
| # Comments can only occur at the beginning of a line. |
| # (The value of an entry could contain a comment character). |
| if line.startswith('//') or line.startswith('#'): |
| return None |
| |
| # Whitespace-only lines do not contain cache entries. |
| if not line.strip(): |
| return None |
| |
| m = cls.CACHE_ENTRY.match(line) |
| if not m: |
| return None |
| |
| name, type_, value = (m.group(g) for g in ('name', 'type', 'value')) |
| if type_ == 'BOOL': |
| try: |
| value = cls._to_bool(value) |
| except ValueError as exc: |
| args = exc.args + ('on line {}: {}'.format(line_no, line),) |
| raise ValueError(args) from exc |
| elif type_ in {'STRING', 'INTERNAL'}: |
| # If the value is a CMake list (i.e. is a string which |
| # contains a ';'), convert to a Python list. |
| if ';' in value: |
| value = value.split(';') |
| |
| return CMakeCacheEntry(name, value) |
| |
| def __init__(self, name, value): |
| self.name = name |
| self.value = value |
| |
| def __str__(self): |
| fmt = 'CMakeCacheEntry(name={}, value={})' |
| return fmt.format(self.name, self.value) |
| |
| |
| class CMakeCache: |
| '''Parses and represents a CMake cache file.''' |
| |
| @staticmethod |
| def from_build_dir(build_dir): |
| return CMakeCache(os.path.join(build_dir, DEFAULT_CACHE)) |
| |
| def __init__(self, cache_file): |
| self.cache_file = cache_file |
| self.load(cache_file) |
| |
| def load(self, cache_file): |
| entries = [] |
| with open(cache_file, 'r', encoding="utf-8") as cache: |
| for line_no, line in enumerate(cache): |
| entry = CMakeCacheEntry.from_line(line, line_no) |
| if entry: |
| entries.append(entry) |
| self._entries = OrderedDict((e.name, e) for e in entries) |
| |
| def get(self, name, default=None): |
| entry = self._entries.get(name) |
| if entry is not None: |
| return entry.value |
| else: |
| return default |
| |
| def get_list(self, name, default=None): |
| if default is None: |
| default = [] |
| entry = self._entries.get(name) |
| if entry is not None: |
| value = entry.value |
| if isinstance(value, list): |
| return value |
| elif isinstance(value, str): |
| return [value] if value else [] |
| else: |
| msg = 'invalid value {} type {}' |
| raise RuntimeError(msg.format(value, type(value))) |
| else: |
| return default |
| |
| def __contains__(self, name): |
| return name in self._entries |
| |
| def __getitem__(self, name): |
| return self._entries[name].value |
| |
| def __setitem__(self, name, entry): |
| if not isinstance(entry, CMakeCacheEntry): |
| msg = 'improper type {} for value {}, expecting CMakeCacheEntry' |
| raise TypeError(msg.format(type(entry), entry)) |
| self._entries[name] = entry |
| |
| def __delitem__(self, name): |
| del self._entries[name] |
| |
| def __iter__(self): |
| return iter(self._entries.values()) |
| |
| def _ensure_min_version(cmake, dry_run): |
| cmd = [cmake, '--version'] |
| if dry_run: |
| log.inf('Dry run:', quote_sh_list(cmd)) |
| return |
| |
| try: |
| version_out = subprocess.check_output(cmd, stderr=subprocess.DEVNULL) |
| except subprocess.CalledProcessError as cpe: |
| log.die('cannot get cmake version:', str(cpe)) |
| decoded = version_out.decode('utf-8') |
| lines = decoded.splitlines() |
| if not lines: |
| log.die('can\'t get cmake version: ' + |
| 'unexpected "cmake --version" output:\n{}\n'. |
| format(decoded) + |
| 'Please install CMake ' + _MIN_CMAKE_VERSION_STR + |
| ' or higher (https://cmake.org/download/).') |
| version = lines[0].split()[2] |
| if packaging.version.parse(version) < _MIN_CMAKE_VERSION: |
| log.die('cmake version', version, |
| 'is less than minimum version {};'. |
| format(_MIN_CMAKE_VERSION_STR), |
| 'please update your CMake (https://cmake.org/download/).') |
| else: |
| log.dbg('cmake version', version, 'is OK; minimum version is', |
| _MIN_CMAKE_VERSION_STR) |
| |
| _MIN_CMAKE_VERSION_STR = '3.13.1' |
| _MIN_CMAKE_VERSION = packaging.version.parse(_MIN_CMAKE_VERSION_STR) |
