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|
{ config, lib, pkgs, ... }: let
cfg.nameserver = "1.1.1.1";
cfg.packageDir = "/var/lib/elm-packages";
cfg.port = 7782;
# TODO secret files
cfg.htpasswd = "/var/lib/certs/package.elm-lang.org/htpasswd";
cfg.sslCertificate = "/var/lib/certs/package.elm-lang.org/fullchain.pem";
cfg.sslCertificateKey = "/var/lib/certs/package.elm-lang.org/key.pem";
semverRegex =
"(?<major>0|[1-9]\\d*)\\.(?<minor>0|[1-9]\\d*)\\.(?<patch>0|[1-9]\\d*)(?:-(?<prerelease>(?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\\.(?:0|[1-9]\\d*|\\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\\+(?<buildmetadata>[0-9a-zA-Z-]+(?:\\.[0-9a-zA-Z-]+)*))?";
in {
services.nginx.virtualHosts."package.elm-lang.org" = {
addSSL = true;
sslCertificate = cfg.sslCertificate;
sslCertificateKey = cfg.sslCertificateKey;
locations."/all-packages".extraConfig = ''
proxy_pass http://127.0.0.1:${toString config.krebs.htgen.elm-packages-proxy.port};
proxy_pass_header Server;
'';
locations."/all-packages/since/".extraConfig = ''
proxy_pass http://127.0.0.1:${toString config.krebs.htgen.elm-packages-proxy.port};
proxy_pass_header Server;
'';
locations."~ ^/packages/(?<author>[A-Za-z0-9-]+)/(?<pname>[A-Za-z0-9-]+)/(?<version>${semverRegex})\$".extraConfig = ''
auth_basic "Restricted Area";
auth_basic_user_file ${cfg.htpasswd};
proxy_set_header X-User $remote_user;
proxy_set_header X-Author $author;
proxy_set_header X-Package $pname;
proxy_set_header X-Version $version;
proxy_pass_header Server;
proxy_pass http://127.0.0.1:${toString config.krebs.htgen.elm-packages-proxy.port};
'';
locations."~ ^/packages/(?<author>[A-Za-z0-9-]+)/(?<pname>[A-Za-z0-9-]+)/(?<version>${semverRegex})/(?:zipball|elm.json|endpoint.json)\$".extraConfig = ''
set $zipball "${cfg.packageDir}/$author/$pname/$version/zipball";
proxy_set_header X-Author $author;
proxy_set_header X-Package $pname;
proxy_set_header X-Version $version;
proxy_set_header X-Zipball $zipball;
proxy_pass_header Server;
resolver ${cfg.nameserver};
if (-f $zipball) {
set $new_uri http://127.0.0.1:${toString config.krebs.htgen.elm-packages-proxy.port};
}
if (!-f $zipball) {
set $new_uri https://package.elm-lang.org$request_uri;
}
proxy_pass $new_uri;
'';
};
krebs.htgen.elm-packages-proxy = {
port = cfg.port;
script = /* sh */ ''. ${pkgs.writeDash "elm-packages-proxy.sh" ''
PATH=${lib.makeBinPath [
pkgs.coreutils
pkgs.curl
pkgs.findutils
pkgs.gnugrep
pkgs.jq
pkgs.p7zip
]}
export PATH
file_response() {(
status_code=$1
status_reason=$2
file=$3
content_type=$4
content_length=$(wc -c "$file" | cut -d\ -f1)
printf "HTTP/1.1 $status_code $status_reason\r\n"
printf 'Connection: close\r\n'
printf 'Content-Length: %d\r\n' "$content_length"
printf 'Content-Type: %s\r\n' "$content_type"
printf 'Server: %s\r\n' "$Server"
printf '\r\n'
cat "$file"
)}
string_response() {(
status_code=$1
status_reason=$2
response_body=$3
content_type=$4
printf "HTTP/1.1 $status_code $status_reason\r\n"
printf 'Connection: close\r\n'
printf 'Content-Length: %d\r\n' "$(expr ''${#response_body} + 1)"
printf 'Content-Type: %s\r\n' "$content_type"
printf 'Server: %s\r\n' "$Server"
printf '\r\n'
printf '%s\n' "$response_body"
)}
case "$Method $Request_URI" in
'GET /packages/'*)
author=$req_x_author
pname=$req_x_package
version=$req_x_version
zipball=${cfg.packageDir}/$author/$pname/$version/zipball
elmjson=$HOME/cache/$author%2F$pname%2F$version%2Felm.json
endpointjson=$HOME/cache/$author%2F$pname%2F$version%2Fendpoint.json
mkdir -p "$HOME/cache"
case $(basename $Request_URI) in
zipball)
file_response 200 OK "$zipball" application/zip
exit
;;
elm.json)
if ! test -f "$elmjson"; then
7z x -so "$zipball" \*/elm.json > "$elmjson"
fi
file_response 200 OK "$elmjson" 'application/json; charset=UTF-8'
exit
;;
endpoint.json)
if ! test -f "$endpointjson"; then
hash=$(sha1sum "$zipball" | cut -d\ -f1)
url=https://package.elm-lang.org/packages/$author/$pname/$version/zipball
jq -n \
--arg hash "$hash" \
--arg url "$url" \
'{ $hash, $url }' \
> "$endpointjson"
fi
file_response 200 OK "$endpointjson" 'application/json; charset=UTF-8'
exit
;;
esac
;;
'POST /packages/'*)
author=$req_x_author
pname=$req_x_package
user=$req_x_user
version=$req_x_version
zipball=${cfg.packageDir}/$author/$pname/$version/zipball
if test -e "$zipball"; then
string_response 409 Conflict \
"package already exists: $author/$pname@$version" \
text/plain
else
echo "user $user is uploading package $author/$pname@$version" >&2
mkdir -p "$(dirname "$zipball")"
head -c $req_content_length > "$zipball"
string_response 200 OK \
"package created: $author/$pname@$version" \
text/plain
fi
exit
;;
'GET /all-packages'|'POST /all-packages')
response=$(mktemp -t htgen.$$.elm-packages-proxy.all-packages.XXXXXXXX)
trap "rm $response >&2" EXIT
{
# upstream packages
curl -fsS https://package.elm-lang.org"$Request_URI"
# private packages
(cd ${cfg.packageDir}; find -mindepth 3 -maxdepth 3) |
jq -Rs '
split("\n") |
map(
select(.!="") |
match("^\\./(?<author>[^/]+)/(?<pname>[^/]+)/(?<version>[^/]+)$").captures |
map({key:.name,value:.string}) |
from_entries
) |
reduce .[] as $item ({};
($item|"\(.author)/\(.pname)") as $name |
. + { "\($name)": ((.[$name] // []) + [$item.version]) }
)
'
} |
jq -cs add > $response
file_response 200 OK "$response" 'application/json; charset=UTF-8'
exit
;;
'GET /all-packages/since/'*|'POST /all-packages/since/'*)
response=$(mktemp -t htgen.$$.elm-packages-proxy.all-packages.XXXXXXXX)
trap "rm $response >&2" EXIT
{
# upstream packages
curl -fsS https://package.elm-lang.org"$Request_URI"
# private packages
(cd ${cfg.packageDir}; find -mindepth 3 -maxdepth 3) |
jq -Rs '
split("\n") |
map(
select(.!="") |
sub("^\\./(?<author>[^/]+)/(?<pname>[^/]+)/(?<version>[^/]+)$";"\(.author)/\(.pname)@\(.version)")
) |
sort_by(split("@") | [.[0]]+(.[1]|split("."))) |
reverse
'
} |
jq -cs add > $response
file_response 200 OK "$response" 'application/json; charset=UTF-8'
exit
;;
esac
''}'';
};
}
|
