152 lines
5.7 KiB
Python
152 lines
5.7 KiB
Python
#!/usr/bin/env python3
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"""
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This file contains a few functions to be shared by all Sys* classes
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"""
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# SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
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# SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
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# SPDX-License-Identifier: GPL-3.0-or-later
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import os
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import hashlib
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import shutil
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import glob
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import subprocess
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import requests
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from lib.utils import mount, umount, get_target, copytree
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class SysGeneral:
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"""
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A class from which all Sys* class are extended.
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Contains functions used in all Sys*
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"""
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def __del__(self):
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if not self.preserve_tmp:
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print("Unmounting tmpfs from %s" % (self.tmp_dir))
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umount(self.tmp_dir)
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os.rmdir(self.tmp_dir)
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def mount_tmpfs(self):
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"""Mount the tmpfs for this sysx"""
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if not os.path.isdir(self.tmp_dir):
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os.mkdir(self.tmp_dir)
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print("Mounting tmpfs on %s" % (self.tmp_dir))
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mount('tmpfs', self.tmp_dir, 'tmpfs', 'size=8G')
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def check_file(self, file_name):
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"""Check hash of downloaded source file."""
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checksum_store = os.path.join(self.git_dir, 'SHA256SUMS.sources')
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with open(checksum_store) as checksum_file:
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hashes = checksum_file.read().splitlines()
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for hash_line in hashes:
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if os.path.basename(file_name) in hash_line:
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# Hash is in store, check it
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expected_hash = hash_line.split()[0]
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with open(file_name, "rb") as downloaded_file:
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downloaded_content = downloaded_file.read() # read entire file as bytes
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readable_hash = hashlib.sha256(downloaded_content).hexdigest()
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if expected_hash == readable_hash:
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return
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raise Exception("Checksum mismatch")
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raise Exception("File checksum is not yet recorded")
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def download_file(self, url, file_name=None):
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"""
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Download a single source archive.
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"""
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cache_dir = os.path.join(self.git_dir, 'sources')
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# Automatically determine file name based on URL.
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if file_name is None:
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file_name = os.path.basename(url)
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abs_file_name = os.path.join(cache_dir, file_name)
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# Create a cache directory for downloaded sources
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if not os.path.isdir(cache_dir):
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os.mkdir(cache_dir)
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# Actually download the file
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if not os.path.isfile(abs_file_name):
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print("Downloading: %s" % (file_name))
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request = requests.get(url, allow_redirects=True)
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open(abs_file_name, 'wb').write(request.content)
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# Check SHA256 hash
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self.check_file(abs_file_name)
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return abs_file_name
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def get_file(self, url, mkbuild=False, output=None):
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"""
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Download and prepare source packages
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url can be either:
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1. a single URL
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2. list of URLs to download. In this case the first URL is the primary URL
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from which we derive the name of package directory
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output can be used to override file name of the downloaded file(s).
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mkbuild=True can be used to pre-create build directories before
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mkdir is available.
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"""
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# Single URL
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if isinstance(url, str):
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assert output is None or isinstance(output, str)
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file_name = url if output is None else output
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urls = [url]
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outputs = [output]
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# Multiple URLs
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elif isinstance(url, list):
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assert output is None or len(output) == len(url)
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file_name = url[0] if output is None else output[0]
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urls = url
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outputs = output if output is not None else [None] * len(url)
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else:
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raise TypeError("url must be either a string or a list of strings")
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# Determine installation directory
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target_name = get_target(file_name)
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target_src_dir = os.path.join(self.base_dir, target_name, 'src')
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# Install base files
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src_tree = os.path.join(self.sys_dir, target_name)
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copytree(src_tree, self.base_dir)
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if not os.path.isdir(target_src_dir):
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os.mkdir(target_src_dir)
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for i, _ in enumerate(urls):
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# Download files into cache directory
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tarball = self.download_file(urls[i], outputs[i])
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# Install sources into target directory
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shutil.copy2(tarball, target_src_dir)
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if mkbuild:
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os.mkdir(os.path.join(self.base_dir, target_name, 'build'))
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def deploy_sysglobal_files(self):
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"""Deploy files common to all Sys*"""
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sysglobal_files = ['bootstrap.cfg', 'helpers.sh']
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for f in sysglobal_files:
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shutil.copy2(os.path.join(self.git_dir, 'sysglobal', f),
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self.base_dir)
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def make_initramfs(self):
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"""Package binary bootstrap seeds and sources into initramfs."""
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self.initramfs_path = os.path.join(self.tmp_dir, 'initramfs')
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# Create a list of files to go within the initramfs
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file_list = glob.glob(os.path.join(self.tmp_dir, '**'), recursive=True)
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# Use built-in removeprefix once we can use Python 3.9
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def remove_prefix(text, prefix):
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if text.startswith(prefix):
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return text[len(prefix):]
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return text # or whatever
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file_list = [remove_prefix(f, self.tmp_dir + os.sep) for f in file_list]
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# Create the initramfs
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with open(self.initramfs_path, "w") as initramfs:
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cpio = subprocess.Popen(["cpio", "--format", "newc", "--create", "--directory", self.tmp_dir],
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stdin=subprocess.PIPE, stdout=initramfs)
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cpio.communicate(input='\n'.join(file_list).encode())
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