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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.
A package is supposed to know, where it came from.
"""
from os import path, walk, makedirs
from shutil import copy2
import subprocess
from pomu.util.fs import strip_prefix
from pomu.util.result import Result
class Package():
def __init__(self, backend, name, root, category=None, version=None, slot='0', d_path=None, files=None, filemap=None):
"""
Parameters:
backend - specific source module object/class
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
filemap - a mapping from destination files to files in the filesystem
category, version, slot - self-descriptive
"""
self.backend = backend
self.name = name
self.root = root
self.category = category
self.version = version
self.slot = slot
self.filemap = {}
if d_path is None and files is None and filemap is None:
self.d_path = None
self.read_path(self.root)
elif d_path:
self.d_path = self.strip_root(d_path)
self.read_path(path.join(self.root, self.d_path))
elif files:
for f in files:
dst = self.strip_root(f)
self.filemap[dst] = path.join(self.root, dst)
elif filemap:
self.filemap = filemap
else:
raise ValueError('You should specify either d_path, files or filemap')
def strip_root(self, d_path):
"""Strip the root component of d_path"""
# the path should be either relative, or a child of root
if d_path.startswith('/'):
if path.commonprefix(d_path, self.root) != self.root:
raise ValueError('Path should be a subdirectory of root')
return strip_prefix(strip_prefix(d_path, self.root), '/')
return d_path
def read_path(self, d_path):
"""Recursively add files from a subtree (specified by d_path)"""
for wd, dirs, files in walk(d_path):
wd = self.strip_root(wd)
self.filemap.update({path.join(wd, f): path.join(self.root, wd, f) for f in files})
def merge_into(self, dst):
"""Merges contents of the package into a specified directory (dst)"""
for trg, src in self.filemap.items():
wd, _ = path.split(trg)
dest = path.join(dst, wd)
try:
makedirs(wd, exists_ok=True)
copy2(src, dest)
except PermissionError:
return Result.Err('You do not have enough permissions')
return Result.Ok()
def gen_manifests(self, dst):
"""
Generate manifests for the installed package (in the dst directory).
TODO: use portage APIs instead of calling repoman.
"""
dirs = [wd for wd, f in self.files if f.endswith('.ebuild')]
dirs = list(set(dirs))
res = []
for d_ in dirs:
d = path.join(dst, d_)
ret = subprocess.run(['repoman', 'manifest'],
stdout=subprocess.PIPE, stderr=subprocess.PIPE,
cwd=d)
if ret.returncode != 0:
return Result.Err('Failed to generate manifest at', d)
if path.exists(path.join(d, 'Manifest')):
res.append(path.join(d, 'Manifest'))
return Result.Ok(res)
def __str__(self):
s = ''
if self.category:
s = self.category + '/'
s += self.name
if self.version:
s += '-' + self.version
if self.slot != '0':
s += self.slot
return s
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