forked from Mirror/pmbootstrap
198f302a36
Introduce a new module: pmb.core to contain explicitly typed pmbootstrap
API. The first component being Suffix and SuffixType. This explicitly
defines what suffixes are possible, future changes should aim to further
constrain this API (e.g. by validating against available device
codenames or architectures for buildroot suffixes).
Additionally, migrate the entire codebase over to using pathlib.Path.
This is a relatively new part of the Python standard library that uses a
more object oriented model for path handling. It also uses strong type
hinting and has other features that make it much cleaner and easier to
work with than pure f-strings. The Chroot class overloads the "/"
operator the same way the Path object does, allowing one to write paths
relative to a given chroot as:
builddir = chroot / "home/pmos/build"
The Chroot class also has a string representation ("native", or
"rootfs_valve-jupiter"), and a .path property for directly accessing the
absolute path (as a Path object).
The general idea here is to encapsulate common patterns into type hinted
code, and gradually reduce the amount of assumptions made around the
codebase so that future changes are easier to implement.
As the chroot suffixes are now part of the Chroot class, we also
implement validation for them, this encodes the rules on suffix naming
and will cause a runtime exception if a suffix doesn't follow the rules.
103 lines
3.3 KiB
Python
103 lines
3.3 KiB
Python
# Copyright 2023 Oliver Smith
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# SPDX-License-Identifier: GPL-3.0-or-later
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import os
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from pathlib import Path
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import time
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from pmb.core.types import PmbArgs
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import pmb.helpers.run
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def replace(path, old, new):
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text = ""
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with open(path, "r", encoding="utf-8") as handle:
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text = handle.read()
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text = text.replace(old, new)
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with open(path, "w", encoding="utf-8") as handle:
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handle.write(text)
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def replace_apkbuild(args, pkgname, key, new, in_quotes=False):
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"""Replace one key=value line in an APKBUILD and verify it afterwards.
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:param pkgname: package name, e.g. "hello-world"
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:param key: key that should be replaced, e.g. "pkgver"
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:param new: new value
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:param in_quotes: expect the value to be in quotation marks ("")
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"""
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# Read old value
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path = pmb.helpers.pmaports.find(args, pkgname) + "/APKBUILD"
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apkbuild = pmb.parse.apkbuild(path)
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old = apkbuild[key]
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# Prepare old/new strings
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if in_quotes:
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line_old = '{}="{}"'.format(key, old)
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line_new = '{}="{}"'.format(key, new)
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else:
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line_old = '{}={}'.format(key, old)
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line_new = '{}={}'.format(key, new)
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# Replace
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replace(path, "\n" + line_old + "\n", "\n" + line_new + "\n")
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# Verify
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del (pmb.helpers.other.cache["apkbuild"][path])
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apkbuild = pmb.parse.apkbuild(path)
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if apkbuild[key] != str(new):
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raise RuntimeError("Failed to set '{}' for pmaport '{}'. Make sure"
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" that there's a line with exactly the string '{}'"
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" and nothing else in: {}".format(key, pkgname,
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line_old, path))
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def is_up_to_date(path_sources, path_target=None, lastmod_target=None):
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"""Check if a file is up-to-date by comparing the last modified timestamps.
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(just like make does it).
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:param path_sources: list of full paths to the source files
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:param path_target: full path to the target file
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:param lastmod_target: the timestamp of the target file. specify this as
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alternative to specifying path_target.
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"""
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if path_target and lastmod_target:
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raise RuntimeError(
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"Specify path_target *or* lastmod_target, not both!")
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lastmod_source = None
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for path_source in path_sources:
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lastmod = os.path.getmtime(path_source)
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if not lastmod_source or lastmod > lastmod_source:
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lastmod_source = lastmod
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if path_target:
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lastmod_target = os.path.getmtime(path_target)
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return lastmod_target >= lastmod_source
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def is_older_than(path, seconds):
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"""Check if a single file is older than a given amount of seconds."""
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if not os.path.exists(path):
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return True
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lastmod = os.path.getmtime(path)
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return lastmod + seconds < time.time()
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def symlink(args: PmbArgs, file: Path, link: Path):
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"""Check if the symlink is already present, otherwise create it."""
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if os.path.exists(link):
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if (os.path.islink(link) and
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os.path.realpath(os.readlink(link)) == os.path.realpath(file)):
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return
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raise RuntimeError("File exists: " + link)
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elif link.is_symlink():
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link.unlink()
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# Create the symlink
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pmb.helpers.run.user(args, ["ln", "-s", file, link])
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