# ex:ts=4:sw=4:sts=4:et
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# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
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"""
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BitBake 'Fetch' implementation for crates.io
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"""
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# Copyright (C) 2016 Doug Goldstein
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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#
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# This program 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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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# Based on functions from the base bb module, Copyright 2003 Holger Schurig
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import hashlib
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import json
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import os
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import shutil
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import subprocess
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import bb
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from bb.fetch2 import logger, subprocess_setup, UnpackError
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from bb.fetch2.wget import Wget
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class Crate(Wget):
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"""Class to fetch crates via wget"""
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def _cargo_bitbake_path(self, rootdir):
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return os.path.join(rootdir, "cargo_home", "bitbake")
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def supports(self, ud, d):
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"""
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Check to see if a given url is for this fetcher
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"""
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return ud.type in ['crate']
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def recommends_checksum(self, urldata):
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return False
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def urldata_init(self, ud, d):
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"""
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Sets up to download the respective crate from crates.io
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"""
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if ud.type == 'crate':
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self._crate_urldata_init(ud, d)
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super(Crate, self).urldata_init(ud, d)
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def _crate_urldata_init(self, ud, d):
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"""
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Sets up the download for a crate
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"""
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# URL syntax is: crate://NAME/VERSION
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# break the URL apart by /
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parts = ud.url.split('/')
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if len(parts) < 5:
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raise bb.fetch2.ParameterError("Invalid URL: Must be crate://HOST/NAME/VERSION", ud.url)
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# last field is version
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version = parts[len(parts) - 1]
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# second to last field is name
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name = parts[len(parts) - 2]
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# host (this is to allow custom crate registries to be specified
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host = '/'.join(parts[2:len(parts) - 2])
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# if using upstream just fix it up nicely
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if host == 'crates.io':
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host = 'crates.io/api/v1/crates'
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ud.url = "https://%s/%s/%s/download" % (host, name, version)
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ud.parm['downloadfilename'] = "%s-%s.crate" % (name, version)
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ud.parm['name'] = name
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logger.debug(2, "Fetching %s to %s" % (ud.url, ud.parm['downloadfilename']))
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def unpack(self, ud, rootdir, d):
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"""
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Uses the crate to build the necessary paths for cargo to utilize it
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"""
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if ud.type == 'crate':
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return self._crate_unpack(ud, rootdir, d)
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else:
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super(Crate, self).unpack(ud, rootdir, d)
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def _crate_unpack(self, ud, rootdir, d):
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"""
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Unpacks a crate
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"""
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thefile = ud.localpath
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# possible metadata we need to write out
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metadata = {}
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# change to the rootdir to unpack but save the old working dir
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save_cwd = os.getcwd()
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os.chdir(rootdir)
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pn = d.getVar('BPN')
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if pn == ud.parm.get('name'):
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cmd = "tar -xz --no-same-owner -f %s" % thefile
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else:
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cargo_bitbake = self._cargo_bitbake_path(rootdir)
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cmd = "tar -xz --no-same-owner -f %s -C %s" % (thefile, cargo_bitbake)
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# ensure we've got these paths made
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bb.utils.mkdirhier(cargo_bitbake)
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# generate metadata necessary
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with open(thefile, 'rb') as f:
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# get the SHA256 of the original tarball
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tarhash = hashlib.sha256(f.read()).hexdigest()
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metadata['files'] = {}
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metadata['package'] = tarhash
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# path it
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path = d.getVar('PATH')
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if path:
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cmd = "PATH=\"%s\" %s" % (path, cmd)
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bb.note("Unpacking %s to %s/" % (thefile, os.getcwd()))
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ret = subprocess.call(cmd, preexec_fn=subprocess_setup, shell=True)
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os.chdir(save_cwd)
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if ret != 0:
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raise UnpackError("Unpack command %s failed with return value %s" % (cmd, ret), ud.url)
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# if we have metadata to write out..
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if len(metadata) > 0:
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cratepath = os.path.splitext(os.path.basename(thefile))[0]
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bbpath = self._cargo_bitbake_path(rootdir)
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mdfile = '.cargo-checksum.json'
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mdpath = os.path.join(bbpath, cratepath, mdfile)
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with open(mdpath, "w") as f:
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json.dump(metadata, f)
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