2017-05-26 20:08:45 +00:00
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"""
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2018-01-04 03:53:35 +00:00
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Copyright 2018 Oliver Smith
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2017-05-26 20:08:45 +00:00
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This file is part of pmbootstrap.
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pmbootstrap is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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pmbootstrap is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with pmbootstrap. If not, see <http://www.gnu.org/licenses/>.
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"""
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2017-05-28 00:44:53 +00:00
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2017-06-19 18:33:56 +00:00
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import os
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2017-11-19 15:04:08 +00:00
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import time
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2017-07-30 21:15:59 +00:00
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import pmb.helpers.run
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2017-05-28 00:44:53 +00:00
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2017-05-26 20:08:45 +00:00
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def replace(path, old, new):
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text = ""
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with open(path, 'r') 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') as handle:
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handle.write(text)
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2017-06-19 18:33:56 +00:00
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2017-06-20 18:13:05 +00:00
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def is_up_to_date(path_sources, path_target=None, lastmod_target=None):
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2017-06-19 18:33:56 +00:00
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"""
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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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2017-06-20 18:13:05 +00:00
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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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2017-06-19 18:33:56 +00:00
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"""
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2017-06-20 18:13:05 +00:00
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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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2017-06-19 18:33:56 +00:00
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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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2017-06-20 18:13:05 +00:00
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if path_target:
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lastmod_target = os.path.getmtime(path_target)
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2017-06-19 18:33:56 +00:00
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return lastmod_target >= lastmod_source
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2017-07-30 21:15:59 +00:00
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2017-11-19 15:04:08 +00:00
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def is_older_than(path, seconds):
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"""
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Check if a single file is older than a given amount of seconds.
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"""
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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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2017-07-30 21:15:59 +00:00
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def symlink(args, file, link):
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"""
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Checks if the symlink is already present, otherwise create it.
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"""
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if os.path.exists(link):
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if (os.path.islink(link) and
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2017-08-15 14:08:48 +00:00
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os.path.realpath(os.readlink(link)) == os.path.realpath(file)):
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2017-07-30 21:15:59 +00:00
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return
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raise RuntimeError("File exists: " + link)
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elif os.path.islink(link):
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os.unlink(link)
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# Create the symlink
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pmb.helpers.run.user(args, ["ln", "-s", file, link])
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