forked from josch/mmdebstrap
Use an caching apt proxy instead of copying /var/cache/apt/archives/*.deb
- only download Release files once and not by apt as well as with curl and thus avoid a mirror push happening between both downloads - no heuristic needed to place the file in their correct mirror location - no manual checksum checking - only throttle download speed when actually downloading and not when retrieving files from the cache - no translation of filenames between how the epoch colon is stored in files in /var/cache/apt/archives versus how it is stored in files on the mirrors - no special handling of stable update and security mirrors - implemented in Python instead of shell and thus an order of magnitude faster
This commit is contained in:
parent
70092c49e8
commit
5885291213
GPG key ID:
F2CBA5C78FBD83E1
7 changed files with 177 additions and 169 deletions
108
caching_proxy.py
Executable file
108
caching_proxy.py
Executable file
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@ -0,0 +1,108 @@
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#!/usr/bin/env python3
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import sys
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import os
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import time
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import http.client
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import http.server
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from io import StringIO
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import pathlib
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import urllib.parse
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oldcachedir = None
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newcachedir = None
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readonly = False
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class ProxyRequestHandler(http.server.BaseHTTPRequestHandler):
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def do_GET(self):
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assert int(self.headers.get("Content-Length", 0)) == 0
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assert self.headers["Host"]
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pathprefix = "http://" + self.headers["Host"] + "/"
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assert self.path.startswith(pathprefix)
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sanitizedpath = urllib.parse.unquote(self.path.removeprefix(pathprefix))
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oldpath = oldcachedir / sanitizedpath
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newpath = newcachedir / sanitizedpath
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if not readonly:
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newpath.parent.mkdir(parents=True, exist_ok=True)
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# just send back to client
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if newpath.exists():
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print(f"proxy cached: {self.path}", file=sys.stderr)
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self.wfile.write(b"HTTP/1.1 200 OK\r\n")
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self.send_header("Content-Length", newpath.stat().st_size)
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self.end_headers()
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with newpath.open(mode="rb") as new:
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while True:
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buf = new.read(64 * 1024) # same as shutil uses
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if not buf:
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break
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self.wfile.write(buf)
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self.wfile.flush()
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return
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if readonly:
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newpath = pathlib.Path("/dev/null")
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# copy from oldpath to newpath and send back to client
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if oldpath.exists():
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print(f"proxy cached: {self.path}", file=sys.stderr)
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self.wfile.write(b"HTTP/1.1 200 OK\r\n")
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self.send_header("Content-Length", oldpath.stat().st_size)
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self.end_headers()
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with oldpath.open(mode="rb") as old, newpath.open(mode="wb") as new:
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while True:
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buf = old.read(64 * 1024) # same as shutil uses
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if not buf:
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break
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self.wfile.write(buf)
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new.write(buf)
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self.wfile.flush()
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return
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# download fresh copy
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try:
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print(f"\rproxy download: {self.path}", file=sys.stderr)
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conn = http.client.HTTPConnection(self.headers["Host"], timeout=5)
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conn.request("GET", self.path, None, dict(self.headers))
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res = conn.getresponse()
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assert (res.status, res.reason) == (200, "OK"), (res.status, res.reason)
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self.wfile.write(b"HTTP/1.1 200 OK\r\n")
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for k, v in res.getheaders():
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# do not allow a persistent connection
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if k == "connection":
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continue
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self.send_header(k, v)
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self.end_headers()
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with newpath.open(mode="wb") as f:
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while True:
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buf = res.read(64 * 1024) # same as shutil uses
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if not buf:
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break
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self.wfile.write(buf)
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f.write(buf)
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time.sleep(64 / 1024) # 1024 kB/s
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self.wfile.flush()
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except Exception as e:
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self.send_error(502)
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def main():
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global oldcachedir, newcachedir, readonly
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if sys.argv[1] == "--readonly":
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readonly = True
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oldcachedir = pathlib.Path(sys.argv[2])
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newcachedir = pathlib.Path(sys.argv[3])
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else:
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oldcachedir = pathlib.Path(sys.argv[1])
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newcachedir = pathlib.Path(sys.argv[2])
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print(f"starting caching proxy for {newcachedir}", file=sys.stderr)
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httpd = http.server.ThreadingHTTPServer(
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server_address=("", 8080), RequestHandlerClass=ProxyRequestHandler
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)
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httpd.serve_forever()
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if __name__ == "__main__":
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main()
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@ -39,7 +39,7 @@ all_formats = ["auto", "directory", "tar", "squashfs", "ext2", "null"]
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mirror = os.getenv("mirror", "http://127.0.0.1/debian")
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hostarch = subprocess.check_output(["dpkg", "--print-architecture"]).decode().strip()
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release_path = f"./shared/cache/debian/dists/{default_dist}/Release"
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release_path = f"./shared/cache/debian/dists/{default_dist}/InRelease"
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if not os.path.exists(release_path):
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print("path doesn't exist:", release_path, file=sys.stderr)
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print("run ./make_mirror.sh first", file=sys.stderr)
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@ -22,8 +22,10 @@ if [ -e ./mmdebstrap ]; then
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perlcritic --severity 4 --verbose 8 ./mmdebstrap
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fi
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[ -e ./tarfilter ] && black --check ./tarfilter
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[ -e ./coverage.py ] && black --check ./coverage.py
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for f in tarfilter coverage.py caching_proxy.py; do
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[ -e "./$f" ] || continue
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black --check "./$f"
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done
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shellcheck --exclude=SC2016 coverage.sh make_mirror.sh run_null.sh run_qemu.sh gpgvnoexpkeysig hooks/*/*.sh
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222
make_mirror.sh
222
make_mirror.sh
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@ -92,76 +92,11 @@ deletecache() {
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}
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cleanup_newcachedir() {
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kill "$PROXYPID" || :
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echo "running cleanup_newcachedir"
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deletecache "$newcachedir"
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}
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get_oldaptnames() {
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if [ ! -e "$1/$2" ]; then
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return
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fi
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xz -dc "$1/$2" \
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| grep-dctrl --no-field-names --show-field=Package,Version,Architecture,Filename '' \
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| paste -sd " \n" \
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| while read -r name ver arch fname; do
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if [ ! -e "$1/$fname" ]; then
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continue
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fi
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# apt stores deb files with the colon encoded as %3a while
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# mirrors do not contain the epoch at all #645895
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case "$ver" in *:*) ver="${ver%%:*}%3a${ver#*:}";; esac
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aptname="$rootdir/var/cache/apt/archives/${name}_${ver}_${arch}.deb"
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# we have to cp and not mv because other
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# distributions might still need this file
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# we have to cp and not symlink because apt
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# doesn't recognize symlinks
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cp --link "$1/$fname" "$aptname"
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echo "$aptname"
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done
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}
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get_newaptnames() {
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if [ ! -e "$1/$2" ]; then
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return
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fi
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# skip empty files by trying to uncompress the first byte of the payload
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if [ "$(xz -dc "$1/$2" | head -c1 | wc -c)" -eq 0 ]; then
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return
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fi
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xz -dc "$1/$2" \
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| grep-dctrl --no-field-names --show-field=Package,Version,Architecture,Filename,SHA256 '' \
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| paste -sd " \n" \
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| while read -r name ver arch fname hash; do
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# sanity check for the hash because sometimes the
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# archive switches the hash algorithm
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if [ "${#hash}" -ne 64 ]; then
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echo "expected hash length of 64 but got ${#hash} for: $hash" >&2
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exit 1
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fi
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dir="${fname%/*}"
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# apt stores deb files with the colon encoded as %3a while
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# mirrors do not contain the epoch at all #645895
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case "$ver" in *:*) ver="${ver%%:*}%3a${ver#*:}";; esac
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aptname="$rootdir/var/cache/apt/archives/${name}_${ver}_${arch}.deb"
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if [ -e "$aptname" ]; then
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# make sure that we found the right file by checking its hash
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echo "$hash $aptname" | sha256sum --check >&2
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mkdir -p "$1/$dir"
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# since we move hardlinks around, the same hardlink might've been
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# moved already into the same place by another distribution.
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# mv(1) refuses to copy A to B if both are hardlinks of each other.
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if [ -e "$aptname" ] && [ -e "$1/$fname" ] && [ "$(stat -c "%d %i" "$aptname")" = "$(stat -c "%d %i" "$1/$fname")" ]; then
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# both files are already the same so we just need to
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# delete the source
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rm "$aptname"
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else
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mv "$aptname" "$1/$fname"
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fi
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echo "$aptname"
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fi
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done
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}
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cleanupapt() {
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echo "running cleanupapt" >&2
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if [ ! -e "$rootdir" ]; then
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@ -175,12 +110,11 @@ cleanupapt() {
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"$rootdir/var/lib/dpkg/status" \
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"$rootdir/var/lib/dpkg/lock-frontend" \
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"$rootdir/var/lib/dpkg/lock" \
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"$rootdir/var/lib/apt/lists/lock" \
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"$rootdir/etc/apt/apt.conf" \
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"$rootdir/etc/apt/sources.list.d/"* \
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"$rootdir/etc/apt/preferences.d/"* \
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"$rootdir/etc/apt/sources.list" \
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"$rootdir/oldaptnames" \
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"$rootdir/newaptnames" \
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"$rootdir/var/cache/apt/archives/lock"; do
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if [ ! -e "$f" ]; then
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echo "does not exist: $f" >&2
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@ -229,9 +163,7 @@ Apt::Get::Download-Only true;
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Acquire::Languages "none";
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Dir::Etc::Trusted "/etc/apt/trusted.gpg";
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Dir::Etc::TrustedParts "/etc/apt/trusted.gpg.d";
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Acquire::http::Dl-Limit "1000";
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Acquire::https::Dl-Limit "1000";
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Acquire::Retries "5";
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Acquire::http::Proxy "http://127.0.0.1:8080/";
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END
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: > "$rootdir/var/lib/dpkg/status"
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@ -256,26 +188,6 @@ END
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APT_CONFIG="$rootdir/etc/apt/apt.conf" apt-get update
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# before downloading packages and before replacing the old Packages
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# file, copy all old *.deb packages from the mirror to
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# /var/cache/apt/archives so that apt will not re-download *.deb
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# packages that we already have
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{
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get_oldaptnames "$oldmirrordir" "dists/$dist/main/binary-$nativearch/Packages.xz"
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case "$dist" in oldstable|stable)
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get_oldaptnames "$oldmirrordir" "dists/$dist-updates/main/binary-$nativearch/Packages.xz"
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;;
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esac
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case "$dist" in
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oldstable)
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get_oldaptnames "$oldcachedir/debian-security" "dists/$dist/updates/main/binary-$nativearch/Packages.xz"
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;;
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stable)
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get_oldaptnames "$oldcachedir/debian-security" "dists/$dist-security/main/binary-$nativearch/Packages.xz"
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;;
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esac
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} | sort -u > "$rootdir/oldaptnames"
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pkgs=$(APT_CONFIG="$rootdir/etc/apt/apt.conf" apt-get indextargets \
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--format '$(FILENAME)' 'Created-By: Packages' "Architecture: $nativearch" \
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| xargs --delimiter='\n' /usr/lib/apt/apt-helper cat-file \
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@ -296,73 +208,8 @@ END
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# shellcheck disable=SC2086
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APT_CONFIG="$rootdir/etc/apt/apt.conf" apt-get --yes install $pkgs
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# to be able to also test gpg verification, we need to create a mirror
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mkdir -p "$newmirrordir/dists/$dist/main/binary-$nativearch/"
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curl --location "$mirror/dists/$dist/Release" > "$newmirrordir/dists/$dist/Release"
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curl --location "$mirror/dists/$dist/Release.gpg" > "$newmirrordir/dists/$dist/Release.gpg"
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curl --location "$mirror/dists/$dist/main/binary-$nativearch/Packages.xz" > "$newmirrordir/dists/$dist/main/binary-$nativearch/Packages.xz"
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codename=$(awk '/^Codename: / { print $2; }' < "$newmirrordir/dists/$dist/Release")
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[ -L "$newmirrordir/dists/$codename" ] || ln -s "$dist" "$newmirrordir/dists/$codename"
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case "$dist" in oldstable|stable)
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mkdir -p "$newmirrordir/dists/$dist-updates/main/binary-$nativearch/"
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curl --location "$mirror/dists/$dist-updates/Release" > "$newmirrordir/dists/$dist-updates/Release"
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curl --location "$mirror/dists/$dist-updates/Release.gpg" > "$newmirrordir/dists/$dist-updates/Release.gpg"
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curl --location "$mirror/dists/$dist-updates/main/binary-$nativearch/Packages.xz" > "$newmirrordir/dists/$dist-updates/main/binary-$nativearch/Packages.xz"
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[ -L "$newmirrordir/dists/$codename-updates" ] || ln -s "$dist-updates" "$newmirrordir/dists/$codename-updates"
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;;
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esac
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case "$dist" in
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oldstable)
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mkdir -p "$newcachedir/debian-security/dists/$dist/updates/main/binary-$nativearch/"
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curl --location "$security_mirror/dists/$dist/updates/Release" > "$newcachedir/debian-security/dists/$dist/updates/Release"
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curl --location "$security_mirror/dists/$dist/updates/Release.gpg" > "$newcachedir/debian-security/dists/$dist/updates/Release.gpg"
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curl --location "$security_mirror/dists/$dist/updates/main/binary-$nativearch/Packages.xz" > "$newcachedir/debian-security/dists/$dist/updates/main/binary-$nativearch/Packages.xz"
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;;
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stable)
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mkdir -p "$newcachedir/debian-security/dists/$dist-security/main/binary-$nativearch/"
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curl --location "$security_mirror/dists/$dist-security/Release" > "$newcachedir/debian-security/dists/$dist-security/Release"
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curl --location "$security_mirror/dists/$dist-security/Release.gpg" > "$newcachedir/debian-security/dists/$dist-security/Release.gpg"
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curl --location "$security_mirror/dists/$dist-security/main/binary-$nativearch/Packages.xz" > "$newcachedir/debian-security/dists/$dist-security/main/binary-$nativearch/Packages.xz"
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[ -L "$newcachedir/debian-security/dists/$codename-security" ] || ln -s "$dist-security" "$newcachedir/debian-security/dists/$codename-security"
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;;
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esac
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# the deb files downloaded by apt must be moved to their right locations in the
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# pool directory
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#
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# Instead of parsing the Packages file, we could also attempt to move the deb
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# files ourselves to the appropriate pool directories. But that approach
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# requires re-creating the heuristic by which the directory is chosen, requires
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# stripping the epoch from the filename and will break once mirrors change.
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# This way, it doesn't matter where the mirror ends up storing the package.
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{
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get_newaptnames "$newmirrordir" "dists/$dist/main/binary-$nativearch/Packages.xz";
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case "$dist" in oldstable|stable)
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get_newaptnames "$newmirrordir" "dists/$dist-updates/main/binary-$nativearch/Packages.xz"
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;;
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esac
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case "$dist" in
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oldstable)
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get_newaptnames "$newcachedir/debian-security" "dists/$dist/updates/main/binary-$nativearch/Packages.xz"
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;;
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stable)
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get_newaptnames "$newcachedir/debian-security" "dists/$dist-security/main/binary-$nativearch/Packages.xz"
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;;
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esac
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} | sort -u > "$rootdir/newaptnames"
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rm "$rootdir/var/cache/apt/archives/lock"
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rmdir "$rootdir/var/cache/apt/archives/partial"
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# remove all packages that were in the old Packages file but not in the
|
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# new one anymore
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comm -23 "$rootdir/oldaptnames" "$rootdir/newaptnames" | xargs --delimiter="\n" --no-run-if-empty rm
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# now the apt cache should be empty
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if [ -n "$(ls -1qA "$rootdir/var/cache/apt/archives/")" ]; then
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echo "$rootdir/var/cache/apt/archives not empty:"
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ls -la "$rootdir/var/cache/apt/archives/"
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exit 1
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fi
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APT_CONFIG="$rootdir/etc/apt/apt.conf" apt-get --option Dir::Etc::SourceList=/dev/null update
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APT_CONFIG="$rootdir/etc/apt/apt.conf" apt-get clean
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@ -425,8 +272,8 @@ components=main
|
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: "${CMD:=./mmdebstrap}"
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: "${USE_HOST_APT_CONFIG:=no}"
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if [ -e "$oldmirrordir/dists/$DEFAULT_DIST/Release" ]; then
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http_code=$(curl --output /dev/null --silent --location --head --time-cond "$oldmirrordir/dists/$DEFAULT_DIST/Release" --write-out '%{http_code}' "$mirror/dists/$DEFAULT_DIST/Release")
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if [ -e "$oldmirrordir/dists/$DEFAULT_DIST/InRelease" ]; then
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http_code=$(curl --output /dev/null --silent --location --head --time-cond "$oldmirrordir/dists/$DEFAULT_DIST/InRelease" --write-out '%{http_code}' "$mirror/dists/$DEFAULT_DIST/InRelease")
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case "$http_code" in
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200) ;; # need update
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304) echo up-to-date; exit 0;;
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@ -434,6 +281,19 @@ if [ -e "$oldmirrordir/dists/$DEFAULT_DIST/Release" ]; then
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esac
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fi
|
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|
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./caching_proxy.py "$oldcachedir" "$newcachedir" &
|
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PROXYPID=$!
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|
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for i in $(seq 10); do
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curl --proxy "http://127.0.0.1:8080/" --silent -o /dev/null "http://deb.debian.org/debian/dists/$DEFAULT_DIST/InRelease" && break
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sleep 1
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done
|
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if [ ! -s "$newmirrordir/dists/$DEFAULT_DIST/InRelease" ]; then
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echo "failed to start proxy" >&2
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kill $PROXYPID
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exit 1
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||||
fi
|
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|
||||
trap "cleanup_newcachedir" EXIT INT TERM
|
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|
||||
mkdir -p "$newcachedir"
|
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|
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@ -447,8 +307,12 @@ elif [ "$HOSTARCH" = arm64 ]; then
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arches="$arches amd64 armhf"
|
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fi
|
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|
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for nativearch in $arches; do
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for dist in oldstable stable testing unstable; do
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# we need the split_inline_sig() function
|
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# shellcheck disable=SC1091
|
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. /usr/share/debootstrap/functions
|
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for dist in oldstable stable testing unstable; do
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for nativearch in $arches; do
|
||||
# non-host architectures are only downloaded for $DEFAULT_DIST
|
||||
if [ "$nativearch" != "$HOSTARCH" ] && [ "$DEFAULT_DIST" != "$dist" ]; then
|
||||
continue
|
||||
|
|
@ -483,8 +347,20 @@ END
|
|||
;;
|
||||
esac
|
||||
done
|
||||
codename=$(awk '/^Codename: / { print $2; }' < "$newmirrordir/dists/$dist/InRelease")
|
||||
ln -s "$dist" "$newmirrordir/dists/$codename"
|
||||
|
||||
# split the InRelease file into Release and Release.gpg not because apt
|
||||
# or debootstrap need it that way but because grep-dctrl does
|
||||
split_inline_sig \
|
||||
"$newmirrordir/dists/$dist/InRelease" \
|
||||
"$newmirrordir/dists/$dist/Release" \
|
||||
"$newmirrordir/dists/$dist/Release.gpg"
|
||||
touch --reference="$newmirrordir/dists/$dist/InRelease" "$newmirrordir/dists/$dist/Release" "$newmirrordir/dists/$dist/Release.gpg"
|
||||
done
|
||||
|
||||
kill $PROXYPID
|
||||
|
||||
# Create some symlinks so that we can trick apt into accepting multiple apt
|
||||
# lines that point to the same repository but look different. This is to
|
||||
# avoid the warning:
|
||||
|
|
@ -530,6 +406,25 @@ if [ "$HAVE_QEMU" = "yes" ]; then
|
|||
;;
|
||||
esac
|
||||
|
||||
# we use the caching proxy again when building the qemu image
|
||||
# - we can re-use the packages that were already downloaded earlier
|
||||
# - we make sure that the qemu image uses the same Release file even
|
||||
# if a mirror push happened between now and earlier
|
||||
# - we avoid polluting the mirror with the additional packages by
|
||||
# using --readonly
|
||||
./caching_proxy.py --readonly "$oldcachedir" "$newcachedir" &
|
||||
PROXYPID=$!
|
||||
|
||||
for i in $(seq 10); do
|
||||
curl --proxy "http://127.0.0.1:8080/" --silent -o /dev/null "http://deb.debian.org/debian/dists/$DEFAULT_DIST/InRelease" && break
|
||||
sleep 1
|
||||
done
|
||||
if [ ! -s "$newmirrordir/dists/$DEFAULT_DIST/InRelease" ]; then
|
||||
echo "failed to start proxy" >&2
|
||||
kill $PROXYPID
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# We must not use any --dpkgopt here because any dpkg options still
|
||||
# leak into the chroot with chrootless mode.
|
||||
# We do not use our own package cache here because
|
||||
|
|
@ -571,11 +466,12 @@ if [ "$HAVE_QEMU" = "yes" ]; then
|
|||
arches=$HOSTARCH
|
||||
fi
|
||||
$CMD --variant=apt --architectures="$arches" --include="$pkgs" \
|
||||
--aptopt='Acquire::http::Dl-Limit "1000"' \
|
||||
--aptopt='Acquire::https::Dl-Limit "1000"' \
|
||||
--aptopt='Acquire::Retries "5"' \
|
||||
--setup-hook='echo "Acquire::http::Proxy \"http://127.0.0.1:8080/\";" > "$1/etc/apt/apt.conf.d/00proxy"' \
|
||||
--customize-hook='rm "$1/etc/apt/apt.conf.d/00proxy"' \
|
||||
"$DEFAULT_DIST" - "$mirror" > "$tmpdir/debian-chroot.tar"
|
||||
|
||||
kill $PROXYPID
|
||||
|
||||
cat << END > "$tmpdir/mmdebstrap.service"
|
||||
[Unit]
|
||||
Description=mmdebstrap worker script
|
||||
|
|
|
|||
|
|
@ -78,6 +78,7 @@ find /tmp/debian-debootstrap/run/ -mindepth 1 -maxdepth 1 ! -name lock -print0 |
|
|||
|
||||
# debootstrap doesn't clean apt
|
||||
rm /tmp/debian-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_unstable_main_binary-{{ HOSTARCH }}_Packages \
|
||||
/tmp/debian-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_unstable_InRelease \
|
||||
/tmp/debian-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_unstable_Release \
|
||||
/tmp/debian-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_unstable_Release.gpg
|
||||
|
||||
|
|
|
|||
|
|
@ -96,6 +96,7 @@ fi
|
|||
find /tmp/debian-{{ DIST }}-debootstrap/run/ -mindepth 1 -maxdepth 1 ! -name lock -print0 | xargs --no-run-if-empty -0 rm -r
|
||||
# debootstrap doesn't clean apt
|
||||
rm /tmp/debian-{{ DIST }}-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_{{ DIST }}_main_binary-{{ HOSTARCH }}_Packages \
|
||||
/tmp/debian-{{ DIST }}-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_{{ DIST }}_InRelease \
|
||||
/tmp/debian-{{ DIST }}-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_{{ DIST }}_Release \
|
||||
/tmp/debian-{{ DIST }}-debootstrap/var/lib/apt/lists/127.0.0.1_debian_dists_{{ DIST }}_Release.gpg
|
||||
|
||||
|
|
|
|||
|
|
@ -4,9 +4,9 @@
|
|||
|
||||
set -eu
|
||||
export LC_ALL=C.UTF-8
|
||||
trap "rm -f Release; rm -rf /tmp/debian-chroot.tar /tmp/expected" EXIT INT TERM
|
||||
/usr/lib/apt/apt-helper download-file "{{ MIRROR }}/dists/{{ DIST }}/Release" Release
|
||||
codename=$(awk '/^Codename: / { print $2; }' Release)
|
||||
trap "rm -f InRelease; rm -rf /tmp/debian-chroot.tar /tmp/expected" EXIT INT TERM
|
||||
/usr/lib/apt/apt-helper download-file "{{ MIRROR }}/dists/{{ DIST }}/InRelease" InRelease
|
||||
codename=$(awk '/^Codename: / { print $2; }' InRelease)
|
||||
{{ CMD }} --mode={{ MODE }} --variant=apt "$codename" /tmp/debian-chroot.tar {{ MIRROR }}
|
||||
echo "deb {{ MIRROR }} $codename main" > /tmp/expected
|
||||
tar --to-stdout --extract --file /tmp/debian-chroot.tar ./etc/apt/sources.list \
|
||||
|
|
|
|||
Loading…
Reference in a new issue