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GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<http://www.gnu.org/licenses/>.

2
Makefile
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clean:
rm -f **/*.pyc

62
amprolla-init
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#!/usr/bin/env python2
# copyright (c) 2017 - Ivan J. <parazyd@dyne.org>
# see LICENSE file for copyright and license details
import os
#import re
import requests
import sys
import threading
import lib.config as config
import lib.delta as delta
import lib.fs as fs
import lib.net as net
from lib.log import die, notice, warn, cleanexit
def popDirs():
paths = fs.crawl()
notice("creating initial directory structure")
for i in range(0, len(paths)):
baseurl = "http://" + "/".join([config.repos[i]["host"], config.repos[i]["dists"]])
basepath = "/".join([config.amprolla["spooldir"], config.repos[i]["dists"]])
for j in paths[config.repos[i]["name"]]:
suiteurl = "/".join([baseurl, j])
suitepath = "/".join([basepath, j])
if not os.path.exists(suitepath):
os.makedirs(suitepath)
for k in config.mainrepofiles:
relurl = "/".join([suiteurl, k])
relfile = "/".join([suitepath, k])
if not os.path.isfile(relfile):
net.download(relurl, relfile)
try:
with open(suitepath + "/Release", "rb") as frel:
rels = frel.read()
relmap = delta.parseRel(rels)
except IOError:
warn("no Release file for %s" % suitepath)
try:
for k in relmap:
if relmap[k] == "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855":
continue # ^ this is /dev/null
fileurl = "/".join([suiteurl, k])
filepath = "/".join([suitepath, k])
if not os.path.exists(os.path.dirname(filepath)):
os.makedirs(os.path.dirname(filepath))
if not os.path.isfile(filepath):
net.download(fileurl, filepath)
except TypeError:
warn("Typeerror")
def merge():
for i in config.amprolla["mergedsubdirs"]:
mdir = "/".join([config.amprolla["mergedir"], i])
if not os.path.exists(mdir):
os.makedirs(mdir)

50
doc/HACKING.md
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* an older spool directory hierarchy, for testing the merging:
https://pub.parazyd.cf/tmp/spool.tgz (2GB)
workflow
--------
`amprolla-init` creates the `spool` directory hierarchy. This hierarchy
is the untouched repositories we want to merge. They can be found in
`lib/config.py` in the `repos` dict.
`fs.crawl()` takes the info from `config.py` and generates the paths we
use to figure out what to download. Then `popDirs()` in `amprolla-init`
uses these paths to actually create the directory structure and download
the `Release` files from there. (NOTE: at a final point it should also
check the gpg signatures from the `InRelease` file)
After the Release files are downloaded, they are parsed for their
contents and all the files they list are downloaded in series (possibly
should be parallel).
So now we have all the files we need to create a merge.
The merge will be done in the `merged/` directory. To do a successful
merge, these are the points that need to be accomplished:
* we must skip packages that are in `config.py/amprolla.banpkgs`
* for each `binary-$arch` we must create a new `Packages` file,
containing our merge:
* we parse every package and fill in a dict
* first priority 0, then 1, then 2, etc...
* if a package already exists from a higher-priority repo - it
gets skipped
* (NOT SURE): if a package from `banpkgs` is in a package's
dependency list - that package gets skipped
* once we've finished the iteration, we dump a new Packages file
from the updated dict
After the initial merge, we need to watch for updates. My idea is to
make amprolla pool the above-mentioned Release files as they contain
enough metadata for us to find out what changed. They also contain a
date entry so we can see if there was actually an update without digging
too deep.
So if we figure out there was an update, we download the new file, parse
it into a dict and compare it to the old version of that file/dict.

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doc/dan-notes
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Ok... so the debian repo is essentially a directory heirarchy...
Ok.. Do you understand the repo heirarchy? ie the main folder (in
amprolla case /merged) with sub folders 'dist' (for repo metadata) and
'pool' (where the actual binary and source packages go)??
forget about the "pool" folder, amprolla doesn't touch it...
in "dists/" you have all the suites ie: jessie, ascii, ceres and all
the and stable, unstable and version symlinks.
in the suite folder, you find the section folders: main contrib non-free
and files InRelease, Release and Release.gpg
InRelease is just the pgp/smime version of the Release file - the gpg
sig is the same as Release.gpg
Anyway the Release file basically is a dictionary of most of the files
in the subdirectory with size and checksums (SHA256, SHA512 etc) in what
is essentially RFC822 format, with a bunch of headers at the top that
specify details about the Release of that suite.
In the suite subdirectories you have a bunch of folders, binary-<arch>
which contains the Packages file, and compressed copies of that, and a
Release Stanza, and similar for the source folder with Sources file and
compressed copies etc.
the Contents files (currently not processed) are their too.
(They contain a list of all the files in each package)
their is also the i8n - folder which contains the processed files.
oops s/processed files/translation files/
Amprolla takes several mirrors and merges them in order of priority
starting with the highest priority. It firsts iterates over the structure
to create it's repo structure, ie dists/<suite>/<section>/ etc and then first
copies the highest priority mirror Packages and Sources files in and then for
the othermirrors iterates over the Packages and Sources files and compares
each package stanza for a match, and if there is a match on name then the highest
priority mirror version is kept, if not then the package is added in.
(This is where the inefficient model really shows up)
After all the new Source and Packages files are processed then the Release and
InRelease files are generated by walking the hierarchy and adding those files in.
There is a lot of complexities, part of which is in the design of amprolla.
What I had started to do, and in describing it now, it seems obvious to me
I should probably have started pretty much from scratch is instead of this
iterative approach of compare and add or skip is keep a cache of each mirrors
last state, and then on each run create a delta between the last state and
current state.
* and how does dak integrate in all of this?
it doesn't. Dak is a standalone repository which just deals with the packages built by our CI
* so it's the same as any debian repo
Yup, slightly modified to handle our CI and some other tweaks
and I checked and our version is in gdo too.
anyway as I was saying about my approach re delta's:
There are big efficiencies in this approach. For starters, we only download the InRelease or
Release and Release.gpg file and after verifying it, compare to the previous state, and we
can use the delta generated to pick what files are new, changed or removed from the repo.
This means we only download the changed files in the repo for a start. And for the
Packages and Sources files we create a delta list of changed stanza's to apply.
Instead of building the entire repo from scratch, we apply the delta
to a copy of our merged repo with handling for priority etc...
What stumped me in the end is we actually should verify that we only have packages go in that
have a matching source stanza and we really need to process the contents and translations
at the same time.
I suspect that nextime realised this which is why he started on amprolla2 which essentially
replicates dak + amprolla function...
I just realised, I forgot to mention the overrides processing in amprolla. In the very
top of the dir in "merged/" is the "indices" folder that contains overrides. These
files specify for each Packages files, any metadata changes that need to be applied to
package stanza's
In debian their is a entry for every single deb package/source in the archive making
them very large. We did away with that to reduce the overhead of processing it created.
So we only have entries for those that need changing, usually to change priorities of
systemd packages and remove recommends and suggests for systemd related packages.
* are indices a part of the repo or only needed by amprolla?
both. In debian, dak generates them and they are hand modified by the repo masters to
apply needed fixes. With amprolla, we only create them for applying our own changes as needed.
Technically they don't need to be in the repo, as they're not used by apt, but practically
it's good to have them there.
hmmm, I think I've cracked my problem...
If I use the Sources delta to identify changed packages, I can use that to pick and apply
the changed Packages stanza's Contents and Translations. This would save lot's of
iterations, and I only need the delta Processing to be done on the Sources files.
Wow that would really speed things up
The other benefit, is we can side load packages this way too and use it to replace dak
as well as either a standalone repo or directly into the merged repo.
And all without a hefty database. or the writeup
your welcome. It has helped me probably as much as you. I think it's
turning into a full rewrite, but seems better design and possibly far easier to
write from scratch.
Anyway, it's nearly 3:30am here, so better get a couple hours sleep!

26
doc/directories
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example aliases(?)
http://packages.devuan.org/devuan/dists/
1.0 -> jessie
2.0 -> ascii
ascii
ascii-backports
ascii-proposed-updates
ascii-security
ascii-updates
ceres -> unstable
jessie
jessie-backports
jessie-proposed-updates
jessie-security
jessie-updates
sid -> unstable
stable -> jessie
stable-backports -> jessie-backports
stable-proposed-updates -> jessie-proposed-updates/
stable-updates -> jessie-updates/
testing -> ascii
testing-backports -> ascii-backports
testing-proposed-updates -> ascii-proposed-updates/
testing-updates -> ascii-updates
unstable

96
doc/file-formats
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example package:
----------------
Package: apache2-mpm-event
Source: apache2
Version: 2.4.10-10+deb8u8
Installed-Size: 22
Maintainer: Debian Apache Maintainers <debian-apache@lists.debian.org>
Architecture: amd64
Provides: httpd, httpd-cgi
Depends: apache2 (= 2.4.10-10+deb8u8)
Description: transitional event MPM package for apache2
Homepage: http://httpd.apache.org/
Description-md5: e8836e8c2c34524fb11cc83011803e4e
Section: httpd
Priority: optional
Filename: pool/updates/main/a/apache2/apache2-mpm-event_2.4.10-10+deb8u8_amd64.deb
Size: 1520
MD5sum: e82aa67838c581d8217795dd6dbcb614
SHA1: a0d59e70ea06d145af068f46649ba80a75bb75cf
SHA256: e756d82ab7111a9c76291c91e344bbbddc0d9945704ad42f1140af0594c74cad
example source:
---------------
Package: apache2
Binary: apache2, apache2-data, apache2-bin, apache2-mpm-worker, apache2-mpm-prefork, apache2-mpm-event, apache2-mpm-itk, apache2.2-bin, apache2.2-commo
n, libapache2-mod-proxy-html, libapache2-mod-macro, apache2-utils, apache2-suexec, apache2-suexec-pristine, apache2-suexec-custom, apache2-doc, apache2
-dev, apache2-dbg
Version: 2.4.10-10+deb8u8
Maintainer: Debian Apache Maintainers <debian-apache@lists.debian.org>
Uploaders: Stefan Fritsch <sf@debian.org>, Arno Töll <arno@debian.org>
Build-Depends: debhelper (>= 9.20131213~), lsb-release, dpkg-dev (>= 1.16.1~), libaprutil1-dev (>= 1.5.0), libapr1-dev (>= 1.5.0), libpcre3-dev, zlib1g
-dev, libssl-dev (>= 0.9.8m), perl, liblua5.1-0-dev, libxml2-dev, autotools-dev, gawk | awk
Architecture: any all
Standards-Version: 3.9.6
Format: 3.0 (quilt)
Files:
4cc0006932cbdb7a2597691505f39424 3277 apache2_2.4.10-10+deb8u8.dsc
44543dff14a4ebc1e9e2d86780507156 5031834 apache2_2.4.10.orig.tar.bz2
7d43a85707568321b98305fe61e386d5 555484 apache2_2.4.10-10+deb8u8.debian.tar.xz
Vcs-Browser: http://anonscm.debian.org/gitweb/?p=pkg-apache/apache2.git
Vcs-Git: git://anonscm.debian.org/pkg-apache/apache2.git
Checksums-Sha1:
dd6e773c03c22eb97beffe56e39b9f4b17eea31e 3277 apache2_2.4.10-10+deb8u8.dsc
00f5c3f8274139bd6160eda2cf514fa9b74549e5 5031834 apache2_2.4.10.orig.tar.bz2
a789b374f989dfe3734cb9b1895e7d2891b5fd04 555484 apache2_2.4.10-10+deb8u8.debian.tar.xz
Checksums-Sha256:
c20dc666e6192c3db716e1dfb60afed3248aabd9a2d3232301a11fe8d936dac6 3277 apache2_2.4.10-10+deb8u8.dsc
176c4dac1a745f07b7b91e7f4fd48f9c48049fa6f088efe758d61d9738669c6a 5031834 apache2_2.4.10.orig.tar.bz2
352be8c8245c162a9d97cf167a904fd1684904ffede565f23a654935701b40fa 555484 apache2_2.4.10-10+deb8u8.debian.tar.xz
Homepage: http://httpd.apache.org/
Build-Conflicts: autoconf2.13
Package-List:
apache2 deb httpd optional arch=any
apache2-bin deb httpd optional arch=any
apache2-data deb httpd optional arch=all
apache2-dbg deb debug extra arch=any
apache2-dev deb httpd optional arch=any
apache2-doc deb doc optional arch=all
apache2-mpm-event deb oldlibs extra arch=any
apache2-mpm-itk deb oldlibs extra arch=any
apache2-mpm-prefork deb oldlibs extra arch=any
apache2-mpm-worker deb oldlibs extra arch=any
apache2-suexec deb oldlibs extra arch=any
apache2-suexec-custom deb httpd extra arch=any
apache2-suexec-pristine deb httpd optional arch=any
apache2-utils deb httpd optional arch=any
apache2.2-bin deb oldlibs extra arch=any
apache2.2-common deb oldlibs extra arch=any
libapache2-mod-macro deb oldlibs extra arch=any
libapache2-mod-proxy-html deb oldlibs extra arch=any
Directory: pool/updates/main/a/apache2
Priority: source
Section: httpd
example translation:
--------------------
Package: libactivemq-java
Description-md5: b7875bda385f5f6b4e36597054392132
Description-en: Java message broker core libraries
Apache ActiveMQ is a message broker built around Java Message Service (JMS)
API : allow sending messages between two or more clients in a loosely coupled,
reliable, and asynchronous way.
.
This message broker supports :
* JMS 1.1 and J2EE 1.4 with support for transient, persistent, transactional
and XA messaging
* Spring Framework, CXF and Axis integration
* pluggable transport protocols such as in-VM, TCP, SSL, NIO, UDP, multicast,
JGroups and JXTA
* persistence using JDBC along with journaling
* OpenWire (cross language wire protocol) and
Stomp (Streaming Text Orientated Messaging Protocol) protocols
.
This package contains a core Java library for ActiveMQ.

0
lib/__init__.py
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198
lib/config.py
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#!/usr/bin/env python
# copyright (c) 2017 - Ivan J. <parazyd@dyne.org>
# see LICENSE file for copyright and license details
amprolla = {
"spooldir": "./spool",
"sign_key": "fa1b0274",
"mergedir": "./merged",
"mergedsubdirs": [ "dists", "pool"],
"banpkgs": [ 'systemd', 'systemd-sysv' ]
#"checksums": [ 'md5sum', 'sha1', 'sha256', 'sha512' ]
}
repos = {
## key name is priority, first is 0
0: {
"name": "DEVUAN",
"host": "packages.devuan.org",
"dists": "devuan/dists",
"pool": "devuan/pool",
"aliases": False,
"skipmissing": False
},
1: {
"name": "DEBIAN-SECURITY",
"host": "security.debian.org",
"dists": "dists",
"pool": "pool",
"aliases": True,
"skipmissing": True
},
2: {
"name": "DEBIAN",
#"host": "httpredir.debian.org",
"host": "ftp.debian.org",
"dists": "debian/dists",
"pool": "debian/pool",
"aliases": True,
"skipmissing": False
}
}
suites = {
'jessie': [
'jessie',
'jessie-backports',
'jessie-proposed-updates',
'jessie-security',
'jessie-updates'
],
'ascii': [
'ascii',
'ascii-backports',
'ascii-proposed-updates',
'ascii-security',
'ascii-updates'
],
'unstable': [
'unstable'
]
}
aliases = {
"DEBIAN-SECURITY": {
'ascii-security': 'testing/updates',
'jessie-security': 'jessie/updates'
},
"DEBIAN": {
'ascii': 'testing',
'ascii-backports': 'testing-backports',
'ascii-proposed-updates': 'testing-proposed-updates',
'ascii-updates': 'testing-updates'
}
}
categories = [ 'main', 'contrib', 'non-free' ]
releases = {
"Release-jessie": {
"Suite": "stable",
"Codename": "jessie",
"Label": "Devuan",
"Version": "1.0",
"Description": "Devuan 1.0 Jessie (stable release)"
},
"Release-ascii": {
"Suite": "testing",
"Codename": "ascii",
"Label": "Devuan",
"Version": "2.0",
"Description": "Devuan 2.0 Ascii (testing release)"
},
"Release-unstable": {
"Suite": "unstable",
"Codename": "ceres",
"Label": "Devuan",
"Version": "x.x",
"Description": "Devuan x.x Ceres (unstable release)"
}
}
binaryarches = [
'all',
'alpha',
'amd64',
'arm64',
'armel',
'armhf',
'hppa',
'hurd-i386',
'i386',
'ia64',
'kfreebsd-amd64',
'kfreebsd-i386',
'mips',
'mips64el',
'mipsel',
'powerpc',
'ppc64el',
's390x',
'sparc'
]
installerarches = [
'amd64',
'arm64',
'armel',
'i386'
]
mainrepofiles = [
"InRelease",
"Release",
"Release.gpg"
]
pkgfmt = [
'Package:',
'Version:',
'Essential:',
'Installed-Size:',
'Maintainer:',
'Architecture:',
'Replaces:',
'Provides:',
'Depends:',
'Conflicts:',
'Pre-Depends:',
'Breaks:',
'Homepage:',
'Apport:',
'Auto-Built-Package:',
'Build-Ids',
'Origin:',
'Bugs:',
'Built-Using:',
'Enhances:',
'Recommends:',
'Description:',
'Description-md5:',
'Ghc-Package:',
'Gstreamer-Decoders:',
'Gstreamer-Elements:',
'Gstreamer-Encoders:',
'Gstreamer-Uri-Sinks:',
'Gstreamer-Uri-Sources:',
'Gstreamer-Version:',
'Lua-Versions:',
'Modaliases:',
'Npp-Applications:',
'Npp-Description:',
'Npp-File:',
'Npp-Mimetype:',
'Npp-Name:',
'Origin:',
'Original-Maintainer:',
'Original-Source-Maintainer:',
'Package-Type:',
'Postgresql-Version:',
'Python-Version:',
'Python-Versions:',
'Ruby-Versions:',
'Source:',
'Suggests:',
'Xul-Appid:',
'Multi-Arch:',
'Build-Essential:',
'Tag:',
'Section:',
'Priority:',
'Filename:',
'Size:',
'MD5sum:',
'SHA1:',
'SHA256:'
]

106
lib/delta.py
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#!/usr/bin/env python
# copyright (c) 2017 - Ivan J. <parazyd@dyne.org>
# see LICENSE file for copyright and license details
import ast
import gzip
import re
import requests
import time
import config
from log import notice
def getTime(date):
return time.mktime(time.strptime(date, "%a, %d %b %Y %H:%M:%S %Z"))
def getDate(relfile):
match = re.search('Date: .+', relfile)
if match:
line = relfile[match.start():match.end()]
relfile = line.split(': ')[1]
return relfile
def parseRel(reltext):
hash = {}
match = re.search('SHA256:+', reltext)
if match:
line = reltext[match.start():-1]
for i in line.split('\n'):
if i == 'SHA256:' or i == '\n': # XXX: hack
continue
hash[(i.split()[2])] = i.split()[0]
return hash
def pkgParse(entry):
# for parsing a single package
values = re.split('\\n[A-Z].+?:', entry)[0:]
values[0] = values[0].split(':')[1]
keys = re.findall('\\n[A-Z].+?:', '\n'+entry)
both = zip(keys, values)
return {key.lstrip(): value for key, value in both}
def parsePkgs(pkgtext):
# this parses our package file into a hashmap
# key: package name, value: entire package paragraph as a hashmap
map = {}
# TODO: consider also this approach
#def parsePkgs(pkgfilepath):
#with gzip.open(pkgfilepath, "rb") as f:
# pkgs = f.read().split("\n\n")
pkgs = pkgtext.split("\n\n")
for pkg in pkgs:
m = re.match('Package: .+', pkg)
if m:
line = pkg[m.start():m.end()]
key = line.split(': ')[1]
map[key] = pkgParse(pkg)
return map
def printPkg(map, pkgname):
try:
pkg = ast.literal_eval(map[pkgname])
sin = []
for i in config.pkgfmt:
if config.pkgfmt[i] in pkg.keys():
sin.append(config.pkgfmt[i] + pkg[config.pkgfmt[i]])
return sin
except:
log.die("nonexistent package")
def dictCompare(d1, d2):
d1_keys = set(d1.keys())
d2_keys = set(d2.keys())
intersect_keys = d1_keys.intersection(d2_keys)
modified = {o : (d1[o], d2[o]) for o in intersect_keys if d1[o] != d2[o]}
return modified
def compareRel(oldrel, newrel):
r = requests.get(newrel)
new = r.text
with open(oldrel, "rb") as f:
old = f.read()
oldtime = getTime(getDate(old))
newtime = getTime(getDate(new))
if newtime > oldtime:
notice("Update available")
newhashes = parseRel(new)
oldhashes = parseRel(old)
changes = dictCompare(newhashes, oldhashes)
# k = pkg name, v = sha256
return changes
#relmap = compareRel("../spool/dists/jessie/updates/Release", "http://security.debian.org/dists/jessie/updates/Release")
#print relmap
#for k,v in relmap.iteritems():
# print(k)

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lib/fs.py
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#!/usr/bin/env python
# copyright (c) 2017 - Ivan J. <parazyd@dyne.org>
# see LICENSE file for copyright and license details
import config
def crawl():
paths = {}
for i in range(0, len(config.repos)):
repo = config.repos[i]["name"]
basepath = config.repos[i]["dists"]
sts = []
for j in config.suites:
for k in config.suites[j]:
if config.repos[i]["aliases"] == True:
if repo in config.aliases:
try:
suite = config.aliases[repo][k]
except:
if config.repos[i]["skipmissing"] == True:
continue
else:
suite = k
else:
suite = k
skips = [ "jessie-security", "ascii-security" ] ## XXX: HACK:
if repo == "DEBIAN" and suite in skips:
continue
sts.append(suite)
paths[repo] = sts
return paths
#print(crawl())

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lib/log.py
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#!/usr/bin/env python
# copyright (c) 2017 - Ivan J. <parazyd@dyne.org>
# see LICENSE file for copyright and license details
import sys
def die(msg):
print("\033[1;31m[E] %s\033[0m" % msg)
sys.exit(1)
def notice(msg):
print("\033[1;32m(*) %s\033[0m" % msg)
return
def warn(msg):
print("\033[1;33m[W] %s\033[0m" % msg)
return
def cleanexit():
notice("exiting cleanly...")
sys.exit(0)

26
lib/net.py
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#!/usr/bin/env python
# copyright (c) 2017 - Ivan J. <parazyd@dyne.org>
# see LICENSE file for copyright and license details
import requests
import config
from log import die, notice, warn, cleanexit
def download(url, path):
print("\tdownloading: %s\n\tto: %s" % (url, path))
r = requests.get(url, stream=True)
if r.status_code == 404:
warn("not found!")
return
elif r.status_code != 200:
die("fail!")
with open(path, "wb") as f:
for chunk in r.iter_content(chunk_size=1024): # XXX: should be more on gbit servers
if chunk:
f.write(chunk)
#f.flush()
print("\033[1;32m . done\033[0m")
return
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