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# SPDX-License-Identifier: CC0-1.0
# SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
root = true
[*]
charset = utf-8
end_of_line = lf
indent_size = 2
indent_style = spaces
insert_final_newline = true
trim_trailing_whilespace = true
[README]
indent_style = tabs
[*.rs]
indent_size = 4
indent_style = spaces

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# SPDX-License-Identifier: CC0-1.0
# SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
/target

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SPDX-License-Identifier: CC0-1.0
SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>

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# SPDX-License-Identifier: CC0-1.0
# SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
[package]
name = "pr-tracker"
version = "0.1.0"
authors = ["Alyssa Ross <hi@alyssa.is>"]
edition = "2018"
license = "AGPL-3.0-or-later WITH GPL-3.0-linking-exception"
[build-dependencies]
pkg-config = "0.3.19"
[dependencies]
http-types = "*"
once_cell = "1.5"
regex = "1.4"
surf = "2.1"
serde_json = "1.0"
graphql_client = "0.8.0"
serde = "1.0"
askama = "0.10.5"
structopt = "0.3.21"
futures-util = "0.3.12"
[dependencies.async-std]
version = "*" # Use whatever tide uses.
features = ["attributes"]
[dependencies.tide]
version = "0.16.0"
default-features = false
features = ["h1-server", "logger"]
[patch.crates-io]
# https://github.com/djc/askama/pull/447
askama = { git = "https://github.com/djc/askama", branch = "main" }

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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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To do so, attach the following notices to the program. It is safest to attach
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of warranty; and each file should have at least the "copyright" line and a
pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU Affero General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
details.
You should have received a copy of the GNU Affero General Public License along
with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer network,
you should also make sure that it provides a way for users to get its source.
For example, if your program is a web application, its 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/>.

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Creative Commons Legal Code
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THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED
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will not (i) exercise any of his or her remaining Copyright and Related
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express Statement of Purpose.
4. Limitations and Disclaimers.
a. No trademark or patent rights held by Affirmer are waived, abandoned,
surrendered, licensed or otherwise affected by this document.
b. Affirmer offers the Work as-is and makes no representations or
warranties of any kind concerning the Work, express, implied,
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c. Affirmer disclaims responsibility for clearing rights of other persons
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Additional permission under GNU GPL version 3 section 7
If you modify this Program, or any covered work, by linking or combining it with [name of library] (or a modified version of that library), containing parts covered by the terms of [name of library's license], the licensors of this Program grant you additional permission to convey the resulting work.

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MIT License
Copyright (c) <year> <copyright holders>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is furnished
to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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# SPDX-License-Identifier: CC0-1.0
# SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
CARGO = cargo
INSTALL = install
INSTALL_PROGRAM = $(INSTALL)
MKDIR_P = mkdir -p
PROFILE = release
prefix = /usr/local
exec_prefix = $(prefix)
bindir = $(exec_prefix)/bin
all: release
.PHONY: all
cargo-deps: vendor/github_schema.graphql src/merge_commit.graphql
.PHONY: cargo-deps
target/release/pr-tracker: cargo-deps
$(CARGO) build --release
target/debug/pr-tracker: cargo-deps
$(CARGO) build
check: cargo-deps
$(CARGO) test
.PHONY: check
install-dirs:
$(MKDIR_P) $(DESTDIR)$(bindir)
.PHONY: install-dirs
install: install-dirs target/$(PROFILE)/pr-tracker
$(INSTALL_PROGRAM) target/$(PROFILE)/pr-tracker \
$(DESTDIR)$(bindir)/pr-tracker
.PHONY: install
uninstall:
rm -f $(DESTDIR)$(bindir)/pr-tracker
.PHONY: uninstall

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pr-tracker
==========
Run a web server that displays the path a Nixpkgs pull request will
take through the various release channels.
Installation
------------
Build and runtime dependencies:
- libsystemd
- OpenSSL
Other build dependencies:
- Cargo
- rustc
- pkg-config
Other runtime dependencies:
- Git
In most cases, installation should be as simple as
make install
Usage
-----
The program must be supplied with a local checkout of the monitored
git repository, the remote name in the repository corresponding to
upstream Nixpkgs, a User-Agent string to use when contacting the
GitHub API, and a URL where users can download the program's source
code. Optionally, a "mount" path can be specified, which will be
prefixed to all of the server's routes, so that it can be served at a
non-root HTTP path.
For example:
pr-tracker \
--path /var/lib/nixpkgs.git \
--remote nixpkgs \
--user-agent 'pr-tracker (alyssais)' \
--source-url https://example.com/pr-tracker.tar.gz \
--mount pr-tracker
Additionally, a GitHub API token should be supplied on pr-tracker's
standard input.
pr-tracker expects the socket(s) for it to listen on to be set up for
it by a service supervisor, using the systemd socket activation
protocol. It does not support binding its own sockets, but it can
still be run outside of systemd using by implementing the same
interface using utility programs, such as in this example that makes
use of the s6-networking[1] and execline[2] packages (example is
written in POSIX shell, not execline):
s6-tcpserver 0.0.0.0 8000 \
fdmove 3 0 \
env LISTEN_FDS=1 \
getpid LISTEN_PID
redirfd -r 0 /var/lib/pr-tracker/token \
pr-tracker [...]
Further information on available command line arguments can be
obtained with
pr-tracker --help
[1]: https://skarnet.org/software/s6-networking/
[2]: https://skarnet.org/software/execline/
Development
-----------
The upstream git repository for pr-tracker is available at
<https://git.qyliss.net/pr-tracker/>.
Bugs and patches can be sent to the author,
Alyssa Ross <hi@alyssa.is>.
For information about how to use git to send a patch email, see
<https://git-send-email.io/>.
License
-------
Copyright 2021 Alyssa Ross <hi@alyssa.is>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation; either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public
License along with this program; if not, see
<https://www.gnu.org/licenses>.
Additional permission under GNU AGPL version 3 section 7
If you modify this Program, or any covered work, by linking or
combining it with OpenSSL (or a modified version of that library),
containing parts covered by the terms of the OpenSSL License, or the
Original SSLeay License, the licensors of this Program grant you
additional permission to convey the resulting work.

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SPDX-License-Identifier: CC0-1.0
SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>

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// SPDX-License-Identifier: AGPL-3.0-or-later WITH GPL-3.0-linking-exception
// SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
fn main() {
println!("cargo:rustc-link-lib=systemd")
}

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// SPDX-License-Identifier: AGPL-3.0-or-later WITH GPL-3.0-linking-exception
// SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
use std::borrow::Cow;
use std::collections::BTreeMap;
use once_cell::sync::Lazy;
use regex::{Regex, RegexSet};
const NEXT_BRANCH_TABLE: [(&str, &str); 8] = [
(r"\Astaging(-[\d.]+)?\z", "staging-next$1"),
(r"\Astaging-next\z", "master"),
(r"\Amaster\z", "nixpkgs-unstable"),
(r"\Amaster\z", "nixos-unstable-small"),
(r"\Anixos-(.*)-small\z", "nixos-$1"),
(r"\Arelease-([\d.]+)\z", "nixpkgs-$1-darwin"),
(r"\Arelease-([\d.]+)\z", "nixos-$1-small"),
(r"\Astaging-next-([\d.]*)\z", "release-$1"),
];
static BRANCH_NEXTS: Lazy<BTreeMap<&str, Vec<&str>>> = Lazy::new(|| {
NEXT_BRANCH_TABLE
.iter()
.fold(BTreeMap::new(), |mut map, (pattern, next)| {
map.entry(pattern).or_insert_with(Vec::new).push(next);
map
})
});
static BRANCH_NEXTS_BY_INDEX: Lazy<Vec<&Vec<&str>>> = Lazy::new(|| BRANCH_NEXTS.values().collect());
static BRANCH_PATTERNS: Lazy<Vec<Regex>> = Lazy::new(|| {
BRANCH_NEXTS
.keys()
.copied()
.map(Regex::new)
.map(Result::unwrap)
.collect()
});
static BRANCH_REGEXES: Lazy<RegexSet> = Lazy::new(|| RegexSet::new(BRANCH_NEXTS.keys()).unwrap());
pub fn next_branches(branch: &str) -> Vec<Cow<str>> {
BRANCH_REGEXES
.matches(branch)
.iter()
.flat_map(|index| {
let regex = BRANCH_PATTERNS.get(index).unwrap();
BRANCH_NEXTS_BY_INDEX
.get(index)
.unwrap()
.iter()
.map(move |next| regex.replace(branch, *next))
})
.collect()
}
#[test]
fn test_next_branches() {
let res = next_branches("release-20.09");
assert_eq!(res, vec!["nixpkgs-20.09-darwin", "nixos-20.09-small"])
}

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// SPDX-License-Identifier: AGPL-3.0-or-later WITH GPL-3.0-linking-exception
// SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
use std::ffi::OsStr;
use std::fmt::{self, Display, Formatter};
use std::os::unix::ffi::OsStrExt;
use graphql_client::GraphQLQuery;
use serde::Deserialize;
use surf::http::headers::HeaderValue;
use surf::StatusCode;
type GitObjectID = String;
#[derive(Debug)]
pub enum Error {
NotFound,
Serialization(serde_json::Error),
Request(surf::Error),
Response(StatusCode),
Deserialization(http_types::Error),
}
impl Display for Error {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
use Error::*;
match self {
NotFound => write!(f, "Not found"),
Serialization(e) => write!(f, "Serialization error: {}", e),
Request(e) => write!(f, "Request error: {}", e),
Response(s) => write!(f, "Unexpected response status: {}", s),
Deserialization(e) => write!(f, "Deserialization error: {}", e),
}
}
}
impl std::error::Error for Error {}
#[derive(GraphQLQuery)]
#[graphql(
schema_path = "vendor/github_schema.graphql",
query_path = "src/merge_commit.graphql",
response_derives = "Debug"
)]
struct MergeCommitQuery;
#[derive(Debug, Deserialize)]
struct GitHubGraphQLResponse<D> {
data: D,
}
#[derive(Debug)]
pub enum PullRequestStatus {
Open,
Closed,
Merged {
/// This field is optional because GitHub doesn't provide us with this information
/// for PRs merged before around March 2016.
merge_commit_oid: Option<String>,
},
}
#[derive(Debug)]
pub struct MergeInfo {
pub branch: String,
pub status: PullRequestStatus,
}
pub struct GitHub<'a> {
token: &'a OsStr,
user_agent: &'a OsStr,
}
impl<'a> GitHub<'a> {
pub fn new(token: &'a OsStr, user_agent: &'a OsStr) -> Self {
Self { token, user_agent }
}
fn authorization_header(&self) -> Result<HeaderValue, surf::Error> {
let mut value = b"bearer ".to_vec();
value.extend_from_slice(self.token.as_bytes());
Ok(HeaderValue::from_bytes(value)?)
}
pub async fn merge_info_for_nixpkgs_pr(&self, pr: i64) -> Result<MergeInfo, Error> {
let query = MergeCommitQuery::build_query(merge_commit_query::Variables {
owner: "NixOS".to_string(),
repo: "nixpkgs".to_string(),
number: pr,
});
let response = surf::post("https://api.github.com/graphql")
.header("Accept", "application/vnd.github.merge-info-preview+json")
.header(
"User-Agent",
HeaderValue::from_bytes(self.user_agent.as_bytes().to_vec())
.map_err(Error::Request)?,
)
.header(
"Authorization",
self.authorization_header().map_err(Error::Request)?,
)
.body(serde_json::to_vec(&query).map_err(Error::Serialization)?)
.send()
.await
.map_err(Error::Request)?;
let status = response.status();
if status == StatusCode::NotFound || status == StatusCode::Gone {
return Err(Error::NotFound);
} else if !status.is_success() {
return Err(Error::Response(status));
}
let data: GitHubGraphQLResponse<merge_commit_query::ResponseData> = dbg!(response)
.body_json()
.await
.map_err(Error::Deserialization)?;
let pr = data
.data
.repository
.and_then(|repo| repo.pull_request)
.ok_or(Error::NotFound)?;
Ok(MergeInfo {
branch: pr.base_ref_name,
status: if pr.merged {
PullRequestStatus::Merged {
merge_commit_oid: pr.merge_commit.map(|commit| commit.oid),
}
} else if pr.closed {
PullRequestStatus::Closed
} else {
PullRequestStatus::Open
},
})
}
}

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// SPDX-License-Identifier: AGPL-3.0-or-later WITH GPL-3.0-linking-exception
// SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
mod branches;
mod github;
mod nixpkgs;
mod systemd;
mod tree;
use std::ffi::OsString;
use std::path::PathBuf;
use askama::Template;
use async_std::io;
use async_std::net::TcpListener;
use async_std::os::unix::io::FromRawFd;
use async_std::os::unix::net::UnixListener;
use async_std::pin::Pin;
use async_std::prelude::*;
use async_std::process::exit;
use futures_util::future::join_all;
use http_types::mime;
use once_cell::sync::Lazy;
use serde::Deserialize;
use structopt::StructOpt;
use tide::{Request, Response};
use github::{GitHub, PullRequestStatus};
use nixpkgs::Nixpkgs;
use systemd::{is_socket_inet, is_socket_unix, listen_fds};
use tree::Tree;
#[derive(StructOpt, Debug)]
struct Config {
#[structopt(long, parse(from_os_str))]
path: PathBuf,
#[structopt(long, parse(from_os_str))]
remote: PathBuf,
#[structopt(long, parse(from_os_str))]
user_agent: OsString,
#[structopt(long)]
source_url: String,
#[structopt(long, default_value = "/")]
mount: String,
}
static CONFIG: Lazy<Config> = Lazy::new(Config::from_args);
static GITHUB_TOKEN: Lazy<OsString> = Lazy::new(|| {
use std::io::{stdin, BufRead, BufReader};
use std::os::unix::prelude::*;
let mut bytes = Vec::with_capacity(41);
if let Err(e) = BufReader::new(stdin()).read_until(b'\n', &mut bytes) {
eprintln!("pr-tracker: read: {}", e);
exit(74)
}
if bytes.last() == Some(&b'\n') {
bytes.pop();
}
OsString::from_vec(bytes)
});
#[derive(Debug, Default, Template)]
#[template(path = "page.html")]
struct PageTemplate {
error: Option<String>,
pr_number: Option<String>,
closed: bool,
tree: Option<Tree>,
source_url: String,
}
#[derive(Debug, Deserialize)]
struct Query {
pr: Option<String>,
}
async fn track_pr(pr_number: Option<String>, status: &mut u16, page: &mut PageTemplate) {
let pr_number = match pr_number {
Some(pr_number) => pr_number,
None => return,
};
let pr_number_i64 = match pr_number.parse() {
Ok(n) => n,
Err(_) => {
*status = 400;
page.error = Some(format!("Invalid PR number: {}", pr_number));
return;
}
};
let github = GitHub::new(&GITHUB_TOKEN, &CONFIG.user_agent);
let merge_info = match github.merge_info_for_nixpkgs_pr(pr_number_i64).await {
Err(github::Error::NotFound) => {
*status = 404;
page.error = Some(format!("No such nixpkgs PR #{}.", pr_number_i64));
return;
}
Err(e) => {
*status = 500;
page.error = Some(e.to_string());
return;
}
Ok(info) => info,
};
page.pr_number = Some(pr_number);
if matches!(merge_info.status, PullRequestStatus::Closed) {
page.closed = true;
return;
}
let nixpkgs = Nixpkgs::new(&CONFIG.path, &CONFIG.remote);
let tree = Tree::make(merge_info.branch.to_string(), &merge_info.status, &nixpkgs).await;
if let github::PullRequestStatus::Merged {
merge_commit_oid, ..
} = merge_info.status
{
if merge_commit_oid.is_none() {
page.error = Some("For older PRs, GitHub doesn't tell us the merge commit, so we're unable to track this PR past being merged.".to_string());
}
}
page.tree = Some(tree);
}
async fn handle_request<S>(request: Request<S>) -> http_types::Result<Response> {
let mut status = 200;
let mut page = PageTemplate {
source_url: CONFIG.source_url.clone(),
..Default::default()
};
let pr_number = request.query::<Query>()?.pr;
track_pr(pr_number, &mut status, &mut page).await;
Ok(Response::builder(status)
.content_type(mime::HTML)
.body(page.render()?)
.build())
}
#[async_std::main]
async fn main() {
fn handle_error<T, E>(result: Result<T, E>, code: i32, message: impl AsRef<str>) -> T
where
E: std::error::Error,
{
match result {
Ok(v) => return v,
Err(e) => {
eprintln!("pr-tracker: {}: {}", message.as_ref(), e);
exit(code);
}
}
}
// Make sure arguments are parsed before starting server.
let _ = *CONFIG;
let _ = *GITHUB_TOKEN;
let mut server = tide::new();
let mut root = server.at(&CONFIG.mount);
root.at("/").get(handle_request);
let fd_count = handle_error(listen_fds(true), 71, "sd_listen_fds");
if fd_count == 0 {
eprintln!("pr-tracker: No listen file descriptors given");
exit(64);
}
let mut listeners: Vec<Pin<Box<dyn Future<Output = _>>>> = Vec::new();
for fd in (3..).into_iter().take(fd_count as usize) {
let s = server.clone();
if handle_error(is_socket_inet(fd), 74, "sd_is_socket_inet") {
listeners.push(Box::pin(s.listen(unsafe { TcpListener::from_raw_fd(fd) })));
} else if handle_error(is_socket_unix(fd), 74, "sd_is_socket_unix") {
listeners.push(Box::pin(s.listen(unsafe { UnixListener::from_raw_fd(fd) })));
} else {
eprintln!("pr-tracker: file descriptor {} is not a socket", fd);
exit(64);
}
}
let errors: Vec<_> = join_all(listeners)
.await
.into_iter()
.filter_map(io::Result::err)
.collect();
for error in errors.iter() {
eprintln!("pr-tracker: listen: {}", error);
}
if !errors.is_empty() {
exit(74);
}
}

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# SPDX-License-Identifier: AGPL-3.0-or-later WITH GPL-3.0-linking-exception
# SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
query MergeCommitQuery($owner: String!, $repo: String!, $number: Int!) {
repository(owner: $owner, name: $repo) {
pullRequest(number: $number) {
baseRefName
mergeCommit {
oid
}
merged
closed
}
}
}

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// SPDX-License-Identifier: AGPL-3.0-or-later WITH GPL-3.0-linking-exception
// SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
use std::collections::BTreeSet;
use std::ffi::OsStr;
use std::ffi::OsString;
use std::fmt::{self, Display, Formatter};
use std::os::unix::prelude::*;
use std::path::{Path, PathBuf};
use std::process::ExitStatus;
use async_std::io;
use async_std::process::{Command, Stdio};
#[derive(Debug)]
pub enum Error {
Io(io::Error),
ExitFailure(ExitStatus),
}
impl Display for Error {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
use Error::*;
match self {
Io(e) => write!(f, "git: {}", e),
ExitFailure(e) => match e.code() {
Some(code) => write!(f, "git exited {}", code),
None => write!(f, "git killed by signal {}", e.signal().unwrap()),
},
}
}
}
impl std::error::Error for Error {}
type Result<T, E = Error> = std::result::Result<T, E>;
fn check_status(status: ExitStatus) -> Result<()> {
if status.success() {
Ok(())
} else {
Err(Error::ExitFailure(status))
}
}
pub struct Nixpkgs<'a> {
path: &'a Path,
remote_name: &'a Path,
}
impl<'a> Nixpkgs<'a> {
pub fn new(path: &'a Path, remote_name: &'a Path) -> Self {
Self { path, remote_name }
}
fn git_command(&self, subcommand: impl AsRef<OsStr>) -> Command {
let mut command = Command::new("git");
command.arg("-C");
command.arg(&self.path);
command.arg(subcommand);
command
}
async fn git_branch_contains(&self, commit: &str) -> Result<Vec<u8>> {
let output = self
.git_command("branch")
.args(&["-r", "--format=%(refname)", "--contains"])
.arg(commit)
.stderr(Stdio::inherit())
.output()
.await
.map_err(Error::Io)?;
check_status(output.status)?;
Ok(output.stdout)
}
async fn git_fetch_nixpkgs(&self) -> Result<()> {
// TODO: add refspecs
self.git_command("fetch")
.arg(&self.remote_name)
.status()
.await
.map_err(Error::Io)
.and_then(check_status)
}
pub async fn branches_containing_commit(
&self,
commit: &str,
out: &mut BTreeSet<OsString>,
) -> Result<()> {
let output = match self.git_branch_contains(commit).await {
Err(Error::ExitFailure(status)) if status.code().is_some() => {
eprintln!("pr-tracker: git branch --contains failed; updating branches");
if let Err(e) = self.git_fetch_nixpkgs().await {
eprintln!("pr-tracker: fetching nixpkgs: {}", e);
// Carry on, because it might have fetched what we
// need before dying.
}
self.git_branch_contains(commit).await?
}
Ok(output) => output,
Err(e) => return Err(e),
};
let mut prefix = PathBuf::from("refs/remotes/");
prefix.push(&self.remote_name);
for branch_name in output
.split(|byte| *byte == b'\n')
.filter(|b| !b.is_empty())
.map(OsStr::from_bytes)
.map(Path::new)
.filter_map(|r| r.strip_prefix(&prefix).ok())
.map(Into::into)
{
out.insert(branch_name);
}
Ok(())
}
}

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// SPDX-License-Identifier: AGPL-3.0-or-later WITH GPL-3.0-linking-exception
// SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
use std::io;
use std::os::raw::{c_char, c_int, c_uint};
use std::os::unix::prelude::*;
use std::ptr::null;
extern "C" {
fn sd_listen_fds(unset_environment: c_int) -> c_int;
fn sd_is_socket_inet(
fd: c_int,
family: c_int,
type_: c_int,
listening: c_int,
port: u16,
) -> c_int;
fn sd_is_socket_unix(
fd: c_int,
type_: c_int,
listening: c_int,
path: *const c_char,
length: usize,
) -> c_int;
}
pub fn listen_fds(unset_environment: bool) -> io::Result<c_uint> {
let r = unsafe { sd_listen_fds(if unset_environment { 1 } else { 0 }) };
if r < 0 {
return Err(io::Error::from_raw_os_error(-r));
}
Ok(r as c_uint)
}
pub fn is_socket_inet(fd: RawFd) -> io::Result<bool> {
let r = unsafe { sd_is_socket_inet(fd, 0, 0, -1, 0) };
if r < 0 {
return Err(io::Error::from_raw_os_error(-r));
}
Ok(r != 0)
}
pub fn is_socket_unix(fd: RawFd) -> io::Result<bool> {
let r = unsafe { sd_is_socket_unix(fd, 0, -1, null(), 0) };
if r < 0 {
return Err(io::Error::from_raw_os_error(-r));
}
Ok(r != 0)
}

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// SPDX-License-Identifier: AGPL-3.0-or-later WITH GPL-3.0-linking-exception
// SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
use std::collections::BTreeSet;
use std::ffi::{OsStr, OsString};
use askama::Template;
use crate::branches::next_branches;
use crate::github;
use crate::nixpkgs::Nixpkgs;
#[derive(Debug, Template)]
#[template(path = "tree.html")]
pub struct Tree {
branch_name: String,
accepted: Option<bool>,
children: Vec<Tree>,
}
impl Tree {
fn generate(branch: String, found_branches: &mut BTreeSet<OsString>) -> Tree {
found_branches.insert((&branch).into());
let nexts = next_branches(&branch)
.into_iter()
.map(|b| Self::generate(b.to_string(), found_branches))
.collect();
Tree {
accepted: None,
branch_name: branch,
children: nexts,
}
}
fn fill_accepted(&mut self, branches: &BTreeSet<OsString>, missing_means_absent: bool) {
self.accepted = match branches.contains(OsStr::new(&self.branch_name)) {
true => Some(true),
false if missing_means_absent => Some(false),
false => None,
};
for child in self.children.iter_mut() {
child.fill_accepted(branches, missing_means_absent);
}
}
pub async fn make(base_branch: String, merge_status: &github::PullRequestStatus, nixpkgs: &Nixpkgs<'_>) -> Tree {
let mut missing_means_absent = true;
let mut branches = BTreeSet::new();
let mut tree = Self::generate(base_branch.clone(), &mut branches);
if let github::PullRequestStatus::Merged {
merge_commit_oid, ..
} = merge_status
{
if let Some(merge_commit) = merge_commit_oid {
let mut containing_commits = BTreeSet::new();
if let Err(e) =
nixpkgs.branches_containing_commit(&merge_commit, &mut containing_commits)
.await
{
eprintln!("pr-tracker: branches_containing_commit: {}", e);
missing_means_absent = false;
}
branches = branches
.intersection(&containing_commits)
.cloned()
.collect();
} else {
branches.clear();
missing_means_absent = false;
}
// Even if something goes wrong with our local Git repo,
// or GitHub didn't tell us the merge commit, we know that
// the base branch of the PR must contain the commit,
// because GitHub told us it was merged into it.
branches.insert(base_branch.into());
} else {
branches.clear();
}
tree.fill_accepted(&branches, missing_means_absent);
tree
}
}

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<!-- SPDX-License-Identifier: AGPL-3.0-or-later WITH GPL-3.0-linking-exception -->
<!-- SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is> -->
<!doctype html>
<html lang="en">
<head>
{% match pr_number %}
{% when Some with (pr_number) %}
<title>Nixpkgs PR #{{ pr_number }} progress</title>
{% else %}
<title>Nixpkgs PR progress tracker</title>
{% endmatch %}
<meta charset="utf-8">
<style>
:root {
line-height: 1;
font-family: sans-serif;
text-align: center;
}
body > header {
margin-bottom: 2em;
}
#pr {
width: 6ch;
box-sizing: content-box;
text-align: center;
}
body > section {
background: #c4b0b0;
padding: 0 1em;
margin: 1em auto;
display: flex;
max-width: 50ch;
}
body > main {
display: flex;
justify-content: center;
}
body > main > ol {
text-align: left;
margin: 0;
}
ol, ul {
list-style: none;
padding: 0;
}
ul > li {
margin-left: 2em;
position: relative;
}
ul > li:last-child {
margin-left: 0;
position: static;
}
li {
margin: 1em 0;
line-height: 2;
}
span {
color: transparent;
position: relative;
width: 2em;
height: 2em;
display: inline-block;
margin-right: 0.5em;
z-index: 1;
}
span::after {
content: "";
border-radius: 50%;
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
display: block;
border: .3em solid #7A877D;
color: white;
text-align: center;
line-height: 1.5em;
}
span.state-pending::after {
background: #C2C9C2;
}
span.state-unknown::after {
background: #C4A500;
content: "?";
}
span.state-accepted::after {
background: #00C42D;
content: "✔";
}
span.state-rejected::after {
background: #c40000;
content: "❌︎";
}
ul span::before {
content: "";
position: absolute;
top: 42.5%;
bottom: 42.5%;
right: .5em;
left: -1em;
display: block;
background: #7A877D;
}
ul > li:last-child > span::before {
content: none;
}
ol {
position: relative;
}
ol::before, ul::before {
background: #7A877D;
content: "";
display: block;
left: .85em;
top: 0.5em;
bottom: 1em;
width: .3em;
position: absolute;
}
</style>
</head>
<body>
<header>
<h1>Nixpkgs Pull Request Tracker</h1>
<form>
<label for="pr">PR number: </label>
<input id="pr" name="pr" type="text" pattern="[1-9][0-9]*"
value="{%- match pr_number -%}
{%- when Some with (pr_number) -%}
{{- pr_number -}}
{%- else -%}
{%- endmatch -%}">
<button type="submit">Track</button>
</form>
</header>
{% match error %}
{% when Some with (error) %}
<section>
<p>{{ error }}</p>
</section>
{% else %}
{% endmatch %}
{% match pr_number %}
{% when Some with (pr_number) %}
<main>
<ol>
<li>
{% if closed %}
<span class="state-rejected">❌</span>
{% else %}
<span class="state-accepted">✅</span>
{% endif %}
PR <a href="https://github.com/NixOS/nixpkgs/pull/{{ pr_number }}">#{{ pr_number }}</a>
{% if closed %}
closed
{% endif %}
</li>
{% match tree %}
{% when Some with (tree) %}
{{ tree|safe }}
{% else %}
{% endmatch %}
</ol>
</main>
{% else %}
{% endmatch %}
<footer>
<p>By <a href="https://alyssa.is/">Alyssa Ross</a></p>
<p><a href="{{ source_url }}">Source code</a></p>
</footer>
</body>
</html>

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<!-- SPDX-License-Identifier: AGPL-3.0-or-later WITH GPL-3.0-linking-exception -->
<!-- SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is> -->
<li>
{% match accepted %}
{% when Some with (true) %}
<span class="state-accepted">✅</span>
{% when Some with (false) %}
<span class="state-pending">⚪</span>
{% when None %}
<span class="state-unknown">❓</span>
{% endmatch %}
{{ branch_name }}
{% if !children.is_empty() %}
<ul>
{% for child in children %}
{{ child|safe }}
{% endfor %}
</ul>
{% endif %}
</li>

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SPDX-License-Identifier: MIT
SPDX-FileCopyrightText: 2017 Gregor Martynus