make it a webapp

.gitignore

@@ -1,3 +1,4 @@
 /target
 /targets
 /results
+/db.sqlite

Cargo.toml

@@ -4,4 +4,20 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+axum = { version = "0.7.5", features = ["macros"] }
 color-eyre = "0.6.3"
+futures = "0.3.30"
+reqwest = { version = "0.12.7", features = [
+    "rustls-tls",
+], default-features = false }
+serde = { version = "1.0.210", features = ["derive"] }
+sqlx = { version = "0.8.2", features = [
+    "macros",
+    "migrate",
+    "runtime-tokio",
+    "sqlite",
+] }
+tempfile = "3.12.0"
+tokio = { version = "1.40.0", features = ["full"] }
+tracing = "0.1.40"
+tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }

migrations/20240907153345_create_build_info.sql

@@ -0,0 +1,14 @@
+-- Add migration script here
+
+CREATE TABLE build_info (
+    "nightly" VARCHAR NOT NULL,
+    "target" VARCHAR NOT NULL,
+    "status" VARCHAR NOT NULL,
+    "stderr" VARCHAR NOT NULL,
+
+    PRIMARY KEY ("nightly", "target")
+);
+
+CREATE TABLE finished_nightly (
+    "nightly" VARCHAR NOT NULL PRIMARY KEY
+);

src/build.rs

@@ -0,0 +1,252 @@
+use std::{
+    fmt::{Debug, Display},
+    num::NonZero,
+    path::Path,
+    time::Duration,
+};
+
+use color_eyre::{
+    eyre::{bail, Context},
+    Result,
+};
+use futures::StreamExt;
+use tokio::process::Command;
+use tracing::{debug, info};
+
+use crate::{
+    db::{Db, FullBuildInfo, Status},
+    nightlies::Nightlies,
+};
+
+pub struct Toolchain(String);
+impl Toolchain {
+    pub fn from_nightly(nightly: &str) -> Self {
+        Self(format!("nightly-{nightly}"))
+    }
+}
+impl Debug for Toolchain {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(&self.0)
+    }
+}
+impl Display for Toolchain {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(&self.0)
+    }
+}
+
+pub async fn background_builder(db: Db) -> Result<()> {
+    loop {
+        let nightlies = Nightlies::fetch().await.wrap_err("fetching nightlies")?;
+        let already_finished = db
+            .finished_nightlies()
+            .await
+            .wrap_err("fetching finished nightlies")?;
+
+        let next = nightlies.select_latest_to_build(&already_finished);
+        match next {
+            Some(nightly) => {
+                info!(%nightly, "Building next nightly");
+                build_every_target_for_toolchain(&db, &nightly)
+                    .await
+                    .wrap_err_with(|| format!("building targets for toolchain {nightly}"))?;
+            }
+            None => {
+                info!("No new nightly, waiting for an hour to try again");
+                tokio::time::sleep(Duration::from_secs(1 * 60 * 60)).await;
+            }
+        }
+    }
+}
+
+async fn targets_for_toolchain(toolchain: &Toolchain) -> Result<Vec<String>> {
+    let output = Command::new("rustc")
+        .arg(format!("+{toolchain}"))
+        .arg("--print")
+        .arg("target-list")
+        .output()
+        .await
+        .wrap_err("failed to spawn rustc")?;
+    if !output.status.success() {
+        bail!(
+            "failed to get target-list from rustc: {:?}",
+            String::from_utf8(output.stderr)
+        );
+    }
+
+    Ok(String::from_utf8(output.stdout)
+        .wrap_err("rustc target-list is invalid UTF-8")?
+        .split_whitespace()
+        .map(ToOwned::to_owned)
+        .collect())
+}
+
+#[tracing::instrument]
+async fn install_toolchain(toolchain: &Toolchain) -> Result<()> {
+    info!(%toolchain, "Installing toolchain");
+
+    let result = Command::new("rustup")
+        .arg("toolchain")
+        .arg("install")
+        .arg(&toolchain.0)
+        .arg("--profile")
+        .arg("minimal")
+        .output()
+        .await
+        .wrap_err("failed to spawn rustup")?;
+    if !result.status.success() {
+        bail!("rustup failed: {:?}", String::from_utf8(result.stderr));
+    }
+    let result = Command::new("rustup")
+        .arg("component")
+        .arg("add")
+        .arg("rust-src")
+        .arg("--toolchain")
+        .arg(&toolchain.0)
+        .output()
+        .await
+        .wrap_err("failed to spawn rustup")?;
+    if !result.status.success() {
+        bail!("rustup failed: {:?}", String::from_utf8(result.stderr));
+    }
+    Ok(())
+}
+
+#[tracing::instrument]
+async fn uninstall_toolchain(toolchain: &Toolchain) -> Result<()> {
+    info!(%toolchain, "Uninstalling toolchain");
+
+    let result = Command::new("rustup")
+        .arg("toolchain")
+        .arg("remove")
+        .arg(&toolchain.0)
+        .output()
+        .await
+        .wrap_err("failed to spawn rustup")?;
+    if !result.status.success() {
+        bail!(
+            "rustup toolchain remove failed: {:?}",
+            String::from_utf8(result.stderr)
+        );
+    }
+    Ok(())
+}
+
+pub async fn build_every_target_for_toolchain(db: &Db, nightly: &str) -> Result<()> {
+    if db.is_nightly_finished(nightly).await? {
+        debug!("Nightly is already finished, not trying again");
+        return Ok(());
+    }
+
+    let toolchain = Toolchain::from_nightly(nightly);
+    install_toolchain(&toolchain).await?;
+
+    let targets = targets_for_toolchain(&toolchain)
+        .await
+        .wrap_err("failed to get targets")?;
+
+    let concurrent = std::thread::available_parallelism()
+        .unwrap_or(NonZero::new(2).unwrap())
+        .get()
+        / 2;
+
+    let results = futures::stream::iter(
+        targets
+            .iter()
+            .map(|target| build_single_target(&db, nightly, target)),
+    )
+    .buffer_unordered(concurrent)
+    .collect::<Vec<Result<()>>>()
+    .await;
+    for result in results {
+        result?;
+    }
+
+    for target in targets {
+        build_single_target(db, nightly, &target)
+            .await
+            .wrap_err_with(|| format!("building target {target} for toolchain {toolchain}"))?;
+    }
+
+    // Mark it as finished, so we never have to build it again.
+    db.finish_nightly(nightly).await?;
+
+    uninstall_toolchain(&toolchain).await?;
+
+    Ok(())
+}
+
+#[tracing::instrument(skip(db))]
+async fn build_single_target(db: &Db, nightly: &str, target: &str) -> Result<()> {
+    let existing = db
+        .build_status_full(nightly, target)
+        .await
+        .wrap_err("getting existing build")?;
+    if existing.is_some() {
+        debug!("Build already exists");
+        return Ok(());
+    }
+
+    info!("Building target");
+
+    let tmpdir = tempfile::tempdir().wrap_err("creating temporary directory")?;
+
+    let result = build_target(tmpdir.path(), &Toolchain::from_nightly(nightly), target)
+        .await
+        .wrap_err("running build")?;
+
+    db.insert(FullBuildInfo {
+        nightly: nightly.into(),
+        target: target.into(),
+        status: result.status,
+        stderr: result.stderr,
+    })
+    .await?;
+
+    Ok(())
+}
+
+struct BuildResult {
+    status: Status,
+    stderr: String,
+}
+
+/// Build a target core in a temporary directory and see whether it passes or not.
+async fn build_target(tmpdir: &Path, toolchain: &Toolchain, target: &str) -> Result<BuildResult> {
+    std::fs::create_dir_all(&tmpdir).wrap_err("creating target src dir")?;
+
+    let init = Command::new("cargo")
+        .args(["init", "--lib", "--name", "target-test"])
+        .current_dir(&tmpdir)
+        .output()
+        .await
+        .wrap_err("spawning cargo init")?;
+    if !init.status.success() {
+        bail!("init failed: {}", String::from_utf8(init.stderr)?);
+    }
+
+    let librs = tmpdir.join("src").join("lib.rs");
+    std::fs::write(&librs, "#![no_std]\n")
+        .wrap_err_with(|| format!("writing to {}", librs.display()))?;
+
+    let output = Command::new("cargo")
+        .arg(format!("+{toolchain}"))
+        .args(["build", "-Zbuild-std=core", "--release"])
+        .args(["--target", target])
+        .current_dir(&tmpdir)
+        .output()
+        .await
+        .wrap_err("spawning cargo build")?;
+
+    let stderr = String::from_utf8(output.stderr).wrap_err("cargo stderr utf8")?;
+
+    let status = if output.status.success() {
+        Status::Pass
+    } else {
+        Status::Error
+    };
+
+    info!("Finished build");
+
+    Ok(BuildResult { status, stderr })
+}

src/db.rs

@@ -0,0 +1,130 @@
+use std::{fmt::Display, str::FromStr};
+
+use color_eyre::{eyre::Context, Result};
+use serde::{Deserialize, Serialize};
+use sqlx::{migrate::Migrator, sqlite::SqliteConnectOptions, Pool, Sqlite};
+
+#[derive(Clone)]
+pub struct Db {
+    pub conn: Pool<Sqlite>,
+}
+
+pub static MIGRATOR: Migrator = sqlx::migrate!();
+
+#[derive(sqlx::FromRow, Serialize, Deserialize)]
+pub struct BuildInfo {
+    pub nightly: String,
+    pub target: String,
+    pub status: Status,
+}
+
+#[derive(Clone, sqlx::FromRow, Serialize, Deserialize)]
+pub struct FullBuildInfo {
+    pub nightly: String,
+    pub target: String,
+    pub status: Status,
+    pub stderr: String,
+}
+
+#[derive(Debug, PartialEq, Clone, Copy, sqlx::Type, Serialize, Deserialize)]
+#[sqlx(rename_all = "snake_case")]
+#[serde(rename_all = "lowercase")]
+pub enum Status {
+    Error,
+    Pass,
+}
+
+impl Display for Status {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Error => f.write_str("error"),
+            Self::Pass => f.write_str("pass"),
+        }
+    }
+}
+
+#[derive(sqlx::FromRow)]
+struct FinishedNightly {
+    nightly: String,
+}
+
+impl Db {
+    pub async fn open(path: &str) -> Result<Self> {
+        let db_opts = SqliteConnectOptions::from_str(path)
+            .wrap_err("parsing database URL")?
+            .create_if_missing(true);
+
+        let conn = Pool::connect_with(db_opts)
+            .await
+            .wrap_err_with(|| format!("opening db from `{}`", path))?;
+        Ok(Self { conn })
+    }
+
+    pub async fn insert(&self, info: FullBuildInfo) -> Result<()> {
+        sqlx::query(
+            "INSERT INTO build_info (nightly, target, status, stderr) VALUES (?, ?, ?, ?);",
+        )
+        .bind(info.nightly)
+        .bind(info.target)
+        .bind(info.status)
+        .bind(info.stderr)
+        .execute(&self.conn)
+        .await
+        .wrap_err("inserting build info into database")?;
+        Ok(())
+    }
+
+    pub async fn build_status(&self) -> Result<Vec<BuildInfo>> {
+        sqlx::query_as::<_, BuildInfo>("SELECT nightly, target, status FROM build_info")
+            .fetch_all(&self.conn)
+            .await
+            .wrap_err("getting build status from DB")
+    }
+
+    pub async fn build_status_full(
+        &self,
+        nightly: &str,
+        target: &str,
+    ) -> Result<Option<FullBuildInfo>> {
+        let result = sqlx::query_as::<_, FullBuildInfo>(
+            "SELECT nightly, target, status, stderr FROM build_info
+            WHERE nightly = ? AND target = ?",
+        )
+        .bind(nightly)
+        .bind(target)
+        .fetch_all(&self.conn)
+        .await
+        .wrap_err("getting build status from DB")?;
+        Ok(result.first().cloned())
+    }
+
+    pub async fn finished_nightlies(&self) -> Result<Vec<String>> {
+        let result = sqlx::query_as::<_, FinishedNightly>("SELECT nightly from finished_nightly")
+            .fetch_all(&self.conn)
+            .await
+            .wrap_err("fetching fnished nightlies")?;
+
+        Ok(result.into_iter().map(|nightly| nightly.nightly).collect())
+    }
+
+    pub async fn is_nightly_finished(&self, nightly: &str) -> Result<bool> {
+        let result = sqlx::query_as::<_, FinishedNightly>(
+            "SELECT nightly from finished_nightly WHERE nightly = ?",
+        )
+        .bind(nightly)
+        .fetch_all(&self.conn)
+        .await
+        .wrap_err("fetching fnished nightlies")?;
+
+        Ok(result.len() == 1)
+    }
+
+    pub async fn finish_nightly(&self, nightly: &str) -> Result<()> {
+        sqlx::query("INSERT INTO finished_nightly (nightly) VALUES (?)")
+            .bind(nightly)
+            .execute(&self.conn)
+            .await
+            .wrap_err("inserting finished nightly")?;
+        Ok(())
+    }
+}

src/main.rs

@@ -1,151 +1,30 @@
-use std::{collections::BTreeMap, num::NonZeroUsize, path::Path, process::Command, sync::Mutex};
+mod build;
+mod db;
+mod nightlies;
+mod web;
 
-use color_eyre::{
+use color_eyre::{eyre::WrapErr, Result};
-    eyre::{bail, WrapErr},
+use db::Db;
-    Result,
-};
 
-fn main() -> Result<()> {
+#[tokio::main]
-    let targets = String::from_utf8(
+async fn main() -> Result<()> {
-        Command::new("rustc")
+    tracing_subscriber::fmt().init();
-            .arg("--print")
-            .arg("target-list")
-            .output()?
-            .stdout,
-    )?;
 
-    let year = 2024;
+    let db = Db::open(&std::env::var("DB_PATH").unwrap_or("db.sqlite".into())).await?;
-    let current_month = 6_u32;
+    db::MIGRATOR
-    let current_day = 12_u32;
+        .run(&db.conn)
+        .await
+        .wrap_err("running migrations")?;
 
-    let dates = (current_month.saturating_sub(5)..=current_month).flat_map(|month| {
+    let builder = build::background_builder(db.clone());
-        if month == current_month && current_day <= 16 {
+    let server = web::webserver(db);
-            vec![format!("{year}-{month:0>2}-01")]
+
-        } else {
+    tokio::select! {
-            vec![
+        result = builder => {
-                format!("{year}-{month:0>2}-01"),
+            result
-                format!("{year}-{month:0>2}-15"),
-            ]
         }
-    });
+        result = server => {
-
+            result
-    for date in dates {
-        println!("Doing date {date}");
-
-        let toolchain = format!("nightly-{date}");
-        let result = Command::new("rustup")
-            .arg("toolchain")
-            .arg("install")
-            .arg(&toolchain)
-            .arg("--profile")
-            .arg("minimal")
-            .spawn()?
-            .wait()?;
-        if !result.success() {
-            bail!("rustup failed");
-        }
-        let result = Command::new("rustup")
-            .arg("component")
-            .arg("add")
-            .arg("rust-src")
-            .arg("--toolchain")
-            .arg(&toolchain)
-            .spawn()?
-            .wait()?;
-        if !result.success() {
-            bail!("rustup failed");
-        }
-
-        let queue = targets.lines().collect::<Vec<&str>>();
-        let queue = &Mutex::new(queue);
-
-        std::fs::create_dir_all("targets")?;
-
-        let failures = Mutex::new(BTreeMap::new());
-
-        let targets = Path::new("targets").join(&toolchain);
-
-        std::thread::scope(|s| -> Result<()> {
-            let mut handles = vec![];
-
-            for _ in 0..std::thread::available_parallelism()
-                .unwrap_or(NonZeroUsize::new(1).unwrap())
-                .get()
-            {
-                let handle = s.spawn(|| -> Result<()> {
-                    loop {
-                        let target = {
-                            let mut queue = queue.lock().unwrap();
-                            let Some(next) = queue.pop() else {
-                                return Ok(());
-                            };
-                            println!("remaining: {:>3 } - {next}", queue.len());
-                            next
-                        };
-                        (|| -> Result<()> {
-                            let target_dir = targets.join(target);
-                            std::fs::create_dir_all(&target_dir)
-                                .wrap_err("creating target src dir")?;
-
-                            if !target_dir.join("Cargo.toml").exists() {
-                                let init = Command::new("cargo")
-                                    .args(["init", "--lib", "--name", "target-test"])
-                                    .current_dir(&target_dir)
-                                    .output()
-                                    .wrap_err("spawning cargo init")?;
-                                if !init.status.success() {
-                                    bail!("init failed: {}", String::from_utf8(init.stderr)?);
-                                }
-                            }
-                            let librs = target_dir.join("src").join("lib.rs");
-                            std::fs::write(&librs, "#![no_std]\n")
-                                .wrap_err_with(|| format!("writing to {}", librs.display()))?;
-
-                            let output = Command::new("cargo")
-                                .arg(format!("+{toolchain}"))
-                                .args(["build", "-Zbuild-std=core", "--release"])
-                                .args(["--target", target])
-                                .current_dir(&target_dir)
-                                .output()
-                                .wrap_err("spawning cargo build")?;
-                            if !output.status.success() {
-                                println!("failure: {target}");
-                                let stderr = String::from_utf8(output.stderr)
-                                    .wrap_err("cargo stderr utf8")?;
-                                failures.lock().unwrap().insert(target.to_owned(), stderr);
-                            }
-                            Ok(())
-                        })()
-                        .wrap_err_with(|| format!("while checking {target}"))?;
-                    }
-                });
-                handles.push(handle);
-            }
-
-            for handle in handles {
-                handle.join().unwrap()?;
-            }
-
-            Ok(())
-        })?;
-
-        std::fs::create_dir_all("results").wrap_err("creating results directory")?;
-        std::fs::write(
-            Path::new("results").join(date),
-            failures
-                .lock()
-                .unwrap()
-                .keys()
-                .cloned()
-                .collect::<Vec<_>>()
-                .join(","),
-        )
-        .wrap_err("writing results file")?;
-
-        for (target, stderr) in failures.into_inner().unwrap() {
-            println!("-----------------\nBROKEN TARGET: {target}\n{stderr}\n\n");
         }
     }
-
-    Ok(())
 }

src/nightlies.rs

@@ -0,0 +1,66 @@
+use std::collections::HashSet;
+use std::hash::RandomState;
+
+use color_eyre::eyre::Context;
+use color_eyre::Result;
+use tracing::debug;
+
+const EARLIEST_CUTOFF_DATE: &str = "2023-01-01";
+
+/// All nightlies that exist.
+pub struct Nightlies {
+    all: Vec<String>,
+}
+
+impl Nightlies {
+    pub async fn fetch() -> Result<Nightlies> {
+        let manifests = reqwest::get("https://static.rust-lang.org/manifests.txt")
+            .await
+            .wrap_err("fetching https://static.rust-lang.org/manifests.txt")?
+            .text()
+            .await
+            .wrap_err("fetching body of https://static.rust-lang.org/manifests.txt")?;
+        let mut all = nightlies_from_manifest(&manifests)
+            .into_iter()
+            .filter(|date| date.as_str() > EARLIEST_CUTOFF_DATE)
+            .collect::<Vec<_>>();
+        all.sort_by(|a, b| b.cmp(a));
+        debug!("Loaded {} nightlies from the manifest", all.len());
+        Ok(Self { all })
+    }
+
+    pub fn select_latest_to_build(&self, already_finished: &[String]) -> Option<String> {
+        let already_finished = HashSet::<_, RandomState>::from_iter(already_finished.iter());
+
+        self.all
+            .iter()
+            .find(|nightly| !already_finished.contains(nightly))
+            .cloned()
+    }
+}
+
+fn nightlies_from_manifest(manifest: &str) -> Vec<String> {
+    manifest
+        .lines()
+        .filter_map(|line| {
+            let rest = line.strip_prefix("static.rust-lang.org/dist/")?;
+            let date = rest.strip_suffix("/channel-rust-nightly.toml")?;
+
+            Some(date.to_owned())
+        })
+        .collect()
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn manifest_parse() {
+        let test_manifest = "static.rust-lang.org/dist/2024-08-22/channel-rust-nightly.toml
+static.rust-lang.org/dist/2024-08-22/channel-rust-1.81.0-beta.toml
+static.rust-lang.org/dist/2024-08-22/channel-rust-1.81.0-beta.6.toml
+static.rust-lang.org/dist/2024-08-23/channel-rust-nightly.toml";
+
+        let nightlies = super::nightlies_from_manifest(&test_manifest);
+        assert_eq!(nightlies, vec!["2024-08-22", "2024-08-23"]);
+    }
+}

src/web.rs

@@ -0,0 +1,103 @@
+use axum::{
+    extract::{Query, State},
+    http::StatusCode,
+    response::{Html, IntoResponse, Response},
+    routing::{get, post},
+    Json, Router,
+};
+use color_eyre::{eyre::Context, Result};
+use serde::{Deserialize, Serialize};
+use tracing::{error, info};
+
+use crate::db::Db;
+
+#[derive(Clone)]
+pub struct AppState {
+    pub db: Db,
+}
+
+pub async fn webserver(db: Db) -> Result<()> {
+    let app = Router::new()
+        .route("/", get(root))
+        .route("/build", get(build))
+        .route("/index.css", get(index_css))
+        .route("/target-state", get(target_state))
+        .route("/trigger-build", post(trigger_build))
+        .with_state(AppState { db });
+
+    info!("Serving website on port 3000");
+
+    let listener = tokio::net::TcpListener::bind("0.0.0.0:3000").await.unwrap();
+    axum::serve(listener, app).await.wrap_err("failed to serve")
+}
+
+async fn root() -> impl IntoResponse {
+    Html(include_str!("../static/index.html"))
+}
+
+#[derive(Deserialize)]
+struct BuildQuery {
+    nightly: String,
+    target: String,
+}
+
+async fn build(State(state): State<AppState>, Query(query): Query<BuildQuery>) -> Response {
+    match state
+        .db
+        .build_status_full(&query.nightly, &query.target)
+        .await
+    {
+        Ok(Some(build)) => {
+            let page = include_str!("../static/build.html")
+                .replace("{{nightly}}", &query.nightly)
+                .replace("{{target}}", &query.target)
+                .replace("{{stderr}}", &build.stderr)
+                .replace("{{status}}", &build.status.to_string());
+
+            Html(page).into_response()
+        }
+        Ok(None) => StatusCode::NOT_FOUND.into_response(),
+        Err(err) => {
+            error!(?err, "Error loading target state");
+            StatusCode::INTERNAL_SERVER_ERROR.into_response()
+        }
+    }
+}
+
+async fn index_css() -> impl IntoResponse {
+    (
+        [(
+            axum::http::header::CONTENT_TYPE,
+            axum::http::HeaderValue::from_static("text/css; charset=utf-8"),
+        )],
+        include_str!("../static/index.css"),
+    )
+}
+
+async fn target_state(State(state): State<AppState>) -> impl IntoResponse {
+    state.db.build_status().await.map(Json).map_err(|err| {
+        error!(?err, "Error loading target state");
+        StatusCode::INTERNAL_SERVER_ERROR
+    })
+}
+
+#[derive(Serialize, Deserialize)]
+struct TriggerBuildBody {
+    nightly: String,
+}
+
+#[axum::debug_handler]
+async fn trigger_build(
+    State(_state): State<AppState>,
+    _body: Json<TriggerBuildBody>,
+) -> StatusCode {
+    return StatusCode::BAD_REQUEST;
+    // tokio::spawn(async move {
+    //     let result = build::build_every_target_for_toolchain(&state.db, &body.nightly).await;
+    //     if let Err(err) = result {
+    //         error!(?err, "Error while building");
+    //     }
+    // });
+    //
+    // StatusCode::ACCEPTED
+}

static/build.html

@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Build</title>
+    <link rel="stylesheet" href="/index.css" />
+    <style>
+      .build-indicator-big {
+        padding: 10px;
+      }
+    </style>
+  </head>
+  <body>
+    <h1>Build results nightly-{{nightly}} target-{{target}}</h1>
+    <div class="{{status}} build-indicator-big">{{status}}</div>
+    <pre>
+{{stderr}}
+    </pre>
+  </body>
+</html>

static/index.css

@@ -0,0 +1,26 @@
+html {
+  font-family: sans-serif;
+}
+
+th,
+td {
+  border: 1px solid;
+  margin: 0;
+}
+
+.error {
+  background-color: lightcoral;
+}
+
+.pass {
+  background-color: greenyellow;
+}
+
+.missing {
+  background-color: lightgray;
+}
+
+.build-info-a {
+  color: black;
+  text-decoration: none;
+}

static/index.html

@@ -0,0 +1,179 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Target state</title>
+    <link rel="stylesheet" href="/index.css" />
+  </head>
+  <body>
+    <h1>Target state</h1>
+    <!--<form id="nightly-form">
+      <h2>Force manual build</h2>
+      <label for="nightly-date-field">Nightly date</label>
+      <input id="nightly-date-field" placeholder="2024-08-05" type="text" />
+      <input type="submit" />
+    </form>-->
+    <h2>Historical target state</h2>
+    <label for="target-filter">Target Filter</label>
+    <input id="target-filter" />
+    <label for="target-filter-failed">Filter failed</label>
+    <input type="checkbox" id="target-filter-failed" />
+
+    <table id="target-state" class="target-state-table">
+      <tr>
+        <td>loading...</td>
+      </tr>
+    </table>
+    <script>
+      let data = [];
+      let filter = localStorage.getItem("filter") ?? "";
+      document.getElementById("target-filter").value = filter;
+      document.getElementById("target-filter-failed").value =
+        localStorage.getItem("filterFailed") ?? false;
+
+      const table = document.getElementById("target-state");
+
+      function fetchTargets() {
+        fetch("/target-state")
+          .then((body) => body.json())
+          .then((body) => {
+            data = body;
+            renderTable();
+          });
+      }
+
+      function renderTable() {
+        const allTargets = new Set();
+        const allNightlies = new Set();
+
+        const nightlyInfos = new Map();
+
+        // Targets that have, at some point, errored
+        const targetsWithErrors = new Set();
+
+        for (const info of data) {
+          allNightlies.add(info.nightly);
+
+          if (!info.target.includes(filter)) {
+            continue;
+          }
+
+          if (info.status === "error") {
+            targetsWithErrors.add(info.target);
+          }
+
+          allTargets.add(info.target);
+          if (!nightlyInfos.has(info.nightly)) {
+            nightlyInfos.set(info.nightly, new Map());
+          }
+          nightlyInfos.get(info.nightly).set(info.target, info);
+        }
+
+        const nightlies = Array.from(allNightlies);
+        nightlies.sort();
+        nightlies.reverse();
+        const targets = Array.from(allTargets);
+        targets.sort();
+
+        const header = document.createElement("tr");
+        const headerNightly = document.createElement("th");
+        headerNightly.innerText = "nightly";
+        header.appendChild(headerNightly);
+        const targetHeaders = targets.forEach((target) => {
+          if (
+            document.getElementById("target-filter-failed").checked &&
+            !targetsWithErrors.has(target)
+          ) {
+            return;
+          }
+          const elem = document.createElement("th");
+          elem.innerText = target;
+          header.appendChild(elem);
+        });
+
+        const rows = nightlies.map((nightly) => {
+          const tr = document.createElement("tr");
+
+          const nightlyCol = document.createElement("td");
+          nightlyCol.innerText = nightly;
+          tr.appendChild(nightlyCol);
+
+          const info = nightlyInfos.get(nightly) ?? new Map();
+
+          for (const target of targets) {
+            if (
+              document.getElementById("target-filter-failed").checked &&
+              !targetsWithErrors.has(target)
+            ) {
+              continue;
+            }
+
+            const td = document.createElement("td");
+            const targetInfo = info.get(target);
+
+            if (targetInfo) {
+              const a = document.createElement("a");
+              a.classList.add("build-info-a");
+              a.href = `/build?nightly=${encodeURIComponent(
+                nightly
+              )}&target=${encodeURIComponent(target)}`;
+              a.innerText = targetInfo.status;
+              td.appendChild(a);
+              td.classList.add(targetInfo.status);
+            } else {
+              td.innerText = "";
+              td.classList.add("missing");
+            }
+            tr.appendChild(td);
+          }
+
+          return tr;
+        });
+        table.replaceChildren(header, ...rows);
+      }
+
+      //function onTriggerBuild(e) {
+      //  e.preventDefault();
+      //
+      //  const date = document.getElementById("nightly-date-field").value;
+      //  if (!date) {
+      //    return;
+      //  }
+      //
+      //  fetch("/trigger-build", {
+      //    method: "POST",
+      //    body: JSON.stringify({
+      //      nightly: date,
+      //    }),
+      //    headers: {
+      //      "Content-Type": "application/json",
+      //    },
+      //  }).then(() =>
+      //    alert(`triggered build for ${date}, this may take a few minutes`)
+      //  );
+      //}
+
+      function onFilterChange(e) {
+        filter = e.target.value;
+        localStorage.setItem("filter", filter);
+        console.log(filter);
+
+        renderTable();
+      }
+
+      //document
+      //  .getElementById("nightly-form")
+      //  .addEventListener("submit", onTriggerBuild);
+      document
+        .getElementById("target-filter")
+        .addEventListener("input", onFilterChange);
+      document
+        .getElementById("target-filter-failed")
+        .addEventListener("input", renderTable);
+
+      // Initial fetch
+      fetchTargets();
+    </script>
+  </body>
+</html>