From: Stefan Herbrechtsmeier stefan.herbrechtsmeier@weidmueller.com
Add a bintools base class for packers which compression / decompression entry contents.
Signed-off-by: Stefan Herbrechtsmeier stefan.herbrechtsmeier@weidmueller.com
---
Changes in v5: - Remove self.fetch_package not None check in fetch function
Changes in v3: - Document class properties
Changes in v2: - Add commit to add BintoolPacker class to bintool
tools/binman/bintool.py | 106 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 106 insertions(+)
diff --git a/tools/binman/bintool.py b/tools/binman/bintool.py index 8435b29749..ccc1904d62 100644 --- a/tools/binman/bintool.py +++ b/tools/binman/bintool.py @@ -1,5 +1,7 @@ # SPDX-License-Identifier: GPL-2.0+ # Copyright 2022 Google LLC +# Copyright (C) 2022 Weidmüller Interface GmbH & Co. KG +# Stefan Herbrechtsmeier stefan.herbrechtsmeier@weidmueller.com # """Base class for all bintools
@@ -464,3 +466,107 @@ binaries. It is fairly easy to create new bintools. Just add a new file to the str: Version string for this bintool """ return 'unknown' + +class BintoolPacker(Bintool): + """Tool which compression / decompression entry contents + + This is a bintools base class for compression / decompression packer + + Properties: + name: Name of packer tool + compression: Compression type (COMPRESS_...), value of 'name' property + if none + compress_args: List of positional args provided to tool for compress, + ['--compress'] if none + decompress_args: List of positional args provided to tool for + decompress, ['--decompress'] if none + fetch_package: Name of the tool installed using the apt, value of 'name' + property if none + version_regex: Regular expressions to extract the version from tool + version output, '(v[0-9.]+)' if none + """ + def __init__(self, name, compression=None, compress_args=None, + decompress_args=None, fetch_package=None, + version_regex=r'(v[0-9.]+)'): + desc = '%s compression' % (compression if compression else name) + super().__init__(name, desc) + if compress_args is None: + compress_args = ['--compress'] + self.compress_args = compress_args + if decompress_args is None: + decompress_args = ['--decompress'] + self.decompress_args = decompress_args + if fetch_package is None: + fetch_package = name + self.fetch_package = fetch_package + self.version_regex = version_regex + + def compress(self, indata): + """Compress data + + Args: + indata (bytes): Data to compress + + Returns: + bytes: Compressed data + """ + with tempfile.NamedTemporaryFile(prefix='comp.tmp', + dir=tools.get_output_dir()) as tmp: + tools.write_file(tmp.name, indata) + args = self.compress_args + ['--stdout', tmp.name] + return self.run_cmd(*args, binary=True) + + def decompress(self, indata): + """Decompress data + + Args: + indata (bytes): Data to decompress + + Returns: + bytes: Decompressed data + """ + with tempfile.NamedTemporaryFile(prefix='decomp.tmp', + dir=tools.get_output_dir()) as inf: + tools.write_file(inf.name, indata) + args = self.decompress_args + ['--stdout', inf.name] + return self.run_cmd(*args, binary=True) + + def fetch(self, method): + """Fetch handler + + This installs the gzip package using the apt utility. + + Args: + method (FETCH_...): Method to use + + Returns: + True if the file was fetched and now installed, None if a method + other than FETCH_BIN was requested + + Raises: + Valuerror: Fetching could not be completed + """ + if method != FETCH_BIN: + return None + return self.apt_install(self.fetch_package) + + def version(self): + """Version handler + + Returns: + str: Version number + """ + import re + + result = self.run_cmd_result('-V') + if not result: + return super().version() + + out = result.stdout.strip() + if not out: + out = result.stderr.strip() + if not out: + return super().version() + + m_version = re.search(self.version_regex, out) + return m_version.group(1) if m_version else out