micropython/tools/makemanifest.py

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#!/usr/bin/env python3
#
# This file is part of the MicroPython project, http://micropython.org/
#
# The MIT License (MIT)
#
# Copyright (c) 2019 Damien P. George
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
from __future__ import print_function
import sys
import os
import subprocess
# Always use the mpy-cross from this repo.
sys.path.insert(0, os.path.join(os.path.dirname(__file__), "../mpy-cross"))
import mpy_cross
import manifestfile
VARS = {}
class FreezeError(Exception):
pass
def system(cmd):
try:
output = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
return 0, output
except subprocess.CalledProcessError as er:
return -1, er.output
def get_timestamp(path, default=None):
try:
stat = os.stat(path)
return stat.st_mtime
except OSError:
if default is None:
raise FreezeError("cannot stat {}".format(path))
return default
def mkdir(filename):
path = os.path.dirname(filename)
if not os.path.isdir(path):
os.makedirs(path)
# Formerly make-frozen.py.
# This generates:
# - MP_FROZEN_STR_NAMES macro
# - mp_frozen_str_sizes
# - mp_frozen_str_content
def generate_frozen_str_content(modules):
output = [
b"#include <stdint.h>\n",
b"#define MP_FROZEN_STR_NAMES \\\n",
]
for _, target_path in modules:
print("STR", target_path)
output.append(b'"%s\\0" \\\n' % target_path.encode())
output.append(b"\n")
output.append(b"const uint32_t mp_frozen_str_sizes[] = { ")
for full_path, _ in modules:
st = os.stat(full_path)
output.append(b"%d, " % st.st_size)
output.append(b"0 };\n")
output.append(b"const char mp_frozen_str_content[] = {\n")
for full_path, _ in modules:
with open(full_path, "rb") as f:
data = f.read()
# We need to properly escape the script data to create a C string.
# When C parses hex characters of the form \x00 it keeps parsing the hex
# data until it encounters a non-hex character. Thus one must create
# strings of the form "data\x01" "abc" to properly encode this kind of
# data. We could just encode all characters as hex digits but it's nice
# to be able to read the resulting C code as ASCII when possible.
data = bytearray(data) # so Python2 extracts each byte as an integer
esc_dict = {ord("\n"): b"\\n", ord("\r"): b"\\r", ord('"'): b'\\"', ord("\\"): b"\\\\"}
output.append(b'"')
break_str = False
for c in data:
try:
output.append(esc_dict[c])
except KeyError:
if 32 <= c <= 126:
if break_str:
output.append(b'" "')
break_str = False
output.append(chr(c).encode())
else:
output.append(b"\\x%02x" % c)
break_str = True
output.append(b'\\0"\n')
output.append(b'"\\0"\n};\n\n')
return b"".join(output)
def main():
# Parse arguments
import argparse
cmd_parser = argparse.ArgumentParser(
description="A tool to generate frozen content in MicroPython firmware images."
)
cmd_parser.add_argument("-o", "--output", help="output path")
cmd_parser.add_argument("-b", "--build-dir", help="output path")
cmd_parser.add_argument(
"-f", "--mpy-cross-flags", default="", help="flags to pass to mpy-cross"
)
cmd_parser.add_argument("-v", "--var", action="append", help="variables to substitute")
cmd_parser.add_argument("--mpy-tool-flags", default="", help="flags to pass to mpy-tool")
cmd_parser.add_argument("files", nargs="+", help="input manifest list")
args = cmd_parser.parse_args()
# Extract variables for substitution.
for var in args.var:
name, value = var.split("=", 1)
if os.path.exists(value):
value = os.path.abspath(value)
VARS[name] = value
if "MPY_DIR" not in VARS or "PORT_DIR" not in VARS:
print("MPY_DIR and PORT_DIR variables must be specified")
sys.exit(1)
# Get paths to tools
MPY_CROSS = VARS["MPY_DIR"] + "/mpy-cross/build/mpy-cross"
if sys.platform == "win32":
MPY_CROSS += ".exe"
MPY_CROSS = os.getenv("MICROPY_MPYCROSS", MPY_CROSS)
MPY_TOOL = VARS["MPY_DIR"] + "/tools/mpy-tool.py"
# Ensure mpy-cross is built
if not os.path.exists(MPY_CROSS):
print("mpy-cross not found at {}, please build it first".format(MPY_CROSS))
sys.exit(1)
manifest = manifestfile.ManifestFile(manifestfile.MODE_FREEZE, VARS)
# Include top-level inputs, to generate the manifest
for input_manifest in args.files:
try:
manifest.execute(input_manifest)
except manifestfile.ManifestFileError as er:
print('freeze error executing "{}": {}'.format(input_manifest, er.args[0]))
sys.exit(1)
# Process the manifest
str_paths = []
mpy_files = []
ts_newest = 0
for result in manifest.files():
if result.kind == manifestfile.KIND_FREEZE_AS_STR:
str_paths.append(
(
result.full_path,
result.target_path,
)
)
ts_outfile = result.timestamp
elif result.kind == manifestfile.KIND_FREEZE_AS_MPY:
outfile = "{}/frozen_mpy/{}.mpy".format(args.build_dir, result.target_path[:-3])
ts_outfile = get_timestamp(outfile, 0)
if result.timestamp >= ts_outfile:
print("MPY", result.target_path)
mkdir(outfile)
# Add __version__ to the end of the file before compiling.
with manifestfile.tagged_py_file(result.full_path, result.metadata) as tagged_path:
try:
mpy_cross.compile(
tagged_path,
dest=outfile,
src_path=result.target_path,
opt=result.opt,
mpy_cross=MPY_CROSS,
extra_args=args.mpy_cross_flags.split(),
)
except mpy_cross.CrossCompileError as ex:
print("error compiling {}:".format(result.target_path))
print(ex.args[0])
raise SystemExit(1)
ts_outfile = get_timestamp(outfile)
mpy_files.append(outfile)
else:
assert result.kind == manifestfile.KIND_FREEZE_MPY
mpy_files.append(result.full_path)
ts_outfile = result.timestamp
ts_newest = max(ts_newest, ts_outfile)
# Check if output file needs generating
if ts_newest < get_timestamp(args.output, 0):
# No files are newer than output file so it does not need updating
return
# Freeze paths as strings
output_str = generate_frozen_str_content(str_paths)
# Freeze .mpy files
if mpy_files:
res, output_mpy = system(
[
sys.executable,
MPY_TOOL,
"-f",
"-q",
args.build_dir + "/genhdr/qstrdefs.preprocessed.h",
]
+ args.mpy_tool_flags.split()
+ mpy_files
)
if res != 0:
print("error freezing mpy {}:".format(mpy_files))
print(output_mpy.decode())
sys.exit(1)
else:
output_mpy = (
b'#include "py/emitglue.h"\n'
b"extern const qstr_pool_t mp_qstr_const_pool;\n"
b"const qstr_pool_t mp_qstr_frozen_const_pool = {\n"
b" (qstr_pool_t*)&mp_qstr_const_pool, MP_QSTRnumber_of, 0, 0\n"
b"};\n"
b'const char mp_frozen_names[] = { MP_FROZEN_STR_NAMES "\\0"};\n'
b"const mp_raw_code_t *const mp_frozen_mpy_content[] = {NULL};\n"
)
# Generate output
print("GEN", args.output)
mkdir(args.output)
with open(args.output, "wb") as f:
f.write(b"//\n// Content for MICROPY_MODULE_FROZEN_STR\n//\n")
f.write(output_str)
f.write(b"//\n// Content for MICROPY_MODULE_FROZEN_MPY\n//\n")
f.write(output_mpy)
if __name__ == "__main__":
main()