2f71d66ef7
While the new manifest.py style got introduced for freezing python code
into the resulting binary, the old way - where files and modules within
ports/*/modules where baked into the resulting binary - was still
supported via `freeze('$(PORT_DIR)/modules')` within manifest.py.
However behaviour changed for symlinked directories (=modules), as those
links weren't followed anymore.
This commit restores the original behaviour by explicitly following
symlinks within a modules/ directory
294 lines
10 KiB
Python
294 lines
10 KiB
Python
#!/usr/bin/env python3
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#
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# This file is part of the MicroPython project, http://micropython.org/
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#
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# The MIT License (MIT)
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#
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# Copyright (c) 2019 Damien P. George
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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from __future__ import print_function
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import sys
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import os
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import subprocess
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###########################################################################
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# Public functions to be used in the manifest
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def include(manifest):
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"""Include another manifest.
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The manifest argument can be a string (filename) or an iterable of
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strings.
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Relative paths are resolved with respect to the current manifest file.
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"""
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if not isinstance(manifest, str):
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for m in manifest:
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include(m)
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else:
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manifest = convert_path(manifest)
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with open(manifest) as f:
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# Make paths relative to this manifest file while processing it.
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# Applies to includes and input files.
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prev_cwd = os.getcwd()
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os.chdir(os.path.dirname(manifest))
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exec(f.read())
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os.chdir(prev_cwd)
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def freeze(path, script=None, opt=0):
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"""Freeze the input, automatically determining its type. A .py script
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will be compiled to a .mpy first then frozen, and a .mpy file will be
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frozen directly.
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`path` must be a directory, which is the base directory to search for
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files from. When importing the resulting frozen modules, the name of
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the module will start after `path`, ie `path` is excluded from the
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module name.
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If `path` is relative, it is resolved to the current manifest.py.
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Use $(MPY_DIR), $(MPY_LIB_DIR), $(PORT_DIR), $(BOARD_DIR) if you need
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to access specific paths.
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If `script` is None all files in `path` will be frozen.
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If `script` is an iterable then freeze() is called on all items of the
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iterable (with the same `path` and `opt` passed through).
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If `script` is a string then it specifies the filename to freeze, and
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can include extra directories before the file. The file will be
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searched for in `path`.
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`opt` is the optimisation level to pass to mpy-cross when compiling .py
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to .mpy.
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"""
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freeze_internal(KIND_AUTO, path, script, opt)
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def freeze_as_str(path):
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"""Freeze the given `path` and all .py scripts within it as a string,
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which will be compiled upon import.
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"""
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freeze_internal(KIND_AS_STR, path, None, 0)
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def freeze_as_mpy(path, script=None, opt=0):
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"""Freeze the input (see above) by first compiling the .py scripts to
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.mpy files, then freezing the resulting .mpy files.
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"""
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freeze_internal(KIND_AS_MPY, path, script, opt)
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def freeze_mpy(path, script=None, opt=0):
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"""Freeze the input (see above), which must be .mpy files that are
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frozen directly.
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"""
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freeze_internal(KIND_MPY, path, script, opt)
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###########################################################################
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# Internal implementation
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KIND_AUTO = 0
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KIND_AS_STR = 1
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KIND_AS_MPY = 2
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KIND_MPY = 3
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VARS = {}
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manifest_list = []
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class FreezeError(Exception):
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pass
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def system(cmd):
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try:
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output = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
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return 0, output
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except subprocess.CalledProcessError as er:
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return -1, er.output
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def convert_path(path):
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# Perform variable substituion.
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for name, value in VARS.items():
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path = path.replace('$({})'.format(name), value)
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# Convert to absolute path (so that future operations don't rely on
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# still being chdir'ed).
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return os.path.abspath(path)
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def get_timestamp(path, default=None):
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try:
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stat = os.stat(path)
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return stat.st_mtime
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except OSError:
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if default is None:
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raise FreezeError('cannot stat {}'.format(path))
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return default
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def get_timestamp_newest(path):
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ts_newest = 0
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for dirpath, dirnames, filenames in os.walk(path, followlinks=True):
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for f in filenames:
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ts_newest = max(ts_newest, get_timestamp(os.path.join(dirpath, f)))
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return ts_newest
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def mkdir(path):
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cur_path = ''
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for p in path.split('/')[:-1]:
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cur_path += p + '/'
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try:
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os.mkdir(cur_path)
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except OSError as er:
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if er.args[0] == 17: # file exists
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pass
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else:
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raise er
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def freeze_internal(kind, path, script, opt):
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path = convert_path(path)
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if script is None and kind == KIND_AS_STR:
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if any(f[0] == KIND_AS_STR for f in manifest_list):
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raise FreezeError('can only freeze one str directory')
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manifest_list.append((KIND_AS_STR, path, script, opt))
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elif script is None:
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for dirpath, dirnames, filenames in os.walk(path, followlinks=True):
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for f in filenames:
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freeze_internal(kind, path, (dirpath + '/' + f)[len(path) + 1:], opt)
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elif not isinstance(script, str):
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for s in script:
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freeze_internal(kind, path, s, opt)
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else:
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extension_kind = {KIND_AS_MPY: '.py', KIND_MPY: '.mpy'}
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if kind == KIND_AUTO:
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for k, ext in extension_kind.items():
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if script.endswith(ext):
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kind = k
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break
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else:
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raise FreezeError('unsupported file type {}'.format(script))
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wanted_extension = extension_kind[kind]
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if not script.endswith(wanted_extension):
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raise FreezeError('expecting a {} file, got {}'.format(wanted_extension, script))
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manifest_list.append((kind, path, script, opt))
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def main():
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# Parse arguments
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import argparse
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cmd_parser = argparse.ArgumentParser(description='A tool to generate frozen content in MicroPython firmware images.')
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cmd_parser.add_argument('-o', '--output', help='output path')
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cmd_parser.add_argument('-b', '--build-dir', help='output path')
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cmd_parser.add_argument('-f', '--mpy-cross-flags', default='', help='flags to pass to mpy-cross')
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cmd_parser.add_argument('-v', '--var', action='append', help='variables to substitute')
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cmd_parser.add_argument('files', nargs='+', help='input manifest list')
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args = cmd_parser.parse_args()
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# Extract variables for substitution.
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for var in args.var:
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name, value = var.split('=', 1)
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if os.path.exists(value):
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value = os.path.abspath(value)
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VARS[name] = value
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if 'MPY_DIR' not in VARS or 'PORT_DIR' not in VARS:
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print('MPY_DIR and PORT_DIR variables must be specified')
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sys.exit(1)
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# Get paths to tools
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MAKE_FROZEN = VARS['MPY_DIR'] + '/tools/make-frozen.py'
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MPY_CROSS = VARS['MPY_DIR'] + '/mpy-cross/mpy-cross'
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MPY_TOOL = VARS['MPY_DIR'] + '/tools/mpy-tool.py'
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# Ensure mpy-cross is built
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if not os.path.exists(MPY_CROSS):
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print('mpy-cross not found at {}, please build it first'.format(MPY_CROSS))
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sys.exit(1)
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# Include top-level inputs, to generate the manifest
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for input_manifest in args.files:
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try:
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if input_manifest.endswith('.py'):
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include(input_manifest)
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else:
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exec(input_manifest)
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except FreezeError as er:
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print('freeze error executing "{}": {}'.format(input_manifest, er.args[0]))
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sys.exit(1)
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# Process the manifest
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str_paths = []
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mpy_files = []
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ts_newest = 0
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for kind, path, script, opt in manifest_list:
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if kind == KIND_AS_STR:
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str_paths.append(path)
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ts_outfile = get_timestamp_newest(path)
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elif kind == KIND_AS_MPY:
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infile = '{}/{}'.format(path, script)
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outfile = '{}/frozen_mpy/{}.mpy'.format(args.build_dir, script[:-3])
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ts_infile = get_timestamp(infile)
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ts_outfile = get_timestamp(outfile, 0)
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if ts_infile >= ts_outfile:
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print('MPY', script)
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mkdir(outfile)
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res, out = system([MPY_CROSS] + args.mpy_cross_flags.split() + ['-o', outfile, '-s', script, '-O{}'.format(opt), infile])
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if res != 0:
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print('error compiling {}: {}'.format(infile, out))
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raise SystemExit(1)
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ts_outfile = get_timestamp(outfile)
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mpy_files.append(outfile)
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else:
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assert kind == KIND_MPY
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infile = '{}/{}'.format(path, script)
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mpy_files.append(infile)
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ts_outfile = get_timestamp(infile)
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ts_newest = max(ts_newest, ts_outfile)
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# Check if output file needs generating
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if ts_newest < get_timestamp(args.output, 0):
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# No files are newer than output file so it does not need updating
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return
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# Freeze paths as strings
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res, output_str = system([MAKE_FROZEN] + str_paths)
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if res != 0:
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print('error freezing strings {}: {}'.format(str_paths, output_str))
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sys.exit(1)
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# Freeze .mpy files
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res, output_mpy = system([MPY_TOOL, '-f', '-q', args.build_dir + '/genhdr/qstrdefs.preprocessed.h'] + mpy_files)
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if res != 0:
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print('error freezing mpy {}: {}'.format(mpy_files, output_mpy))
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sys.exit(1)
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# Generate output
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print('GEN', args.output)
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mkdir(args.output)
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with open(args.output, 'wb') as f:
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f.write(b'//\n// Content for MICROPY_MODULE_FROZEN_STR\n//\n')
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f.write(output_str)
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f.write(b'//\n// Content for MICROPY_MODULE_FROZEN_MPY\n//\n')
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f.write(output_mpy)
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if __name__ == '__main__':
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main()
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