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"""
A package is a set of files, situated in a root directory.
A package can be installed into a repository.
A package is supposed to be created by a package source from a set of files.
"""
from os import path
from pomu.util.string import strip_prefix
class Package():
def __init__(self, name, root, d_path=None, files=None):
"""
Parameters:
name - name of the package
root - root path of the repository (if applicable)
d_path - a subdirectory of the root path, which would be sourced recursively.
could be a relative or an absolute path
files - a set of files to build a package from
"""
self.name = name
self.root = root
self.files = []
if d_path is None and files is None:
self.d_path = None
self.read_path(self.root)
elif files is None:
self.d_path = self.strip_root(d_path)
self.read_path(path.join(self.root, self.d_path))
elif d_path is None:
for f in files:
self.files.append(self.strip_root(f))
else:
raise ValueError('You should specify either d_path, or files')
def strip_root(self, d_path):
# the path should be either relative, or a child of root
if d_path.startswith('/'):
if path.commonprefix(d_path, root) != root:
raise ValueError('Path should be a subdirectory of root')
return strip_prefix(strip_prefix(d_path, root), '/')
return d_path
def read_path(self, d_path):
for wd, dirs, files in d_path:
wd = self.strip_root(wd)
self.files.extend([(wd, f) for f in files])
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