updates

Cargo.toml

@@ -6,16 +6,17 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-axum = { version = "0.6.20", features = ["http2", "original-uri", "tracing"] }
-cached = "0.46.1"
+anyhow = { version = "1.0.82", features = ["backtrace"] }
+axum = { version = "0.7.5", features = ["http2", "original-uri", "tracing"] }
+cached = "0.49.3"
 chrono = { version = "0.4.31", features = ["serde"] }
-color-eyre = "0.6.1"
-config = "0.13.3"
+config = "0.14.0"
 glob = "0.3.0"
-opentelemetry = { version = "0.21.0", features = ["metrics"] }
-opentelemetry-jaeger = { version = "0.20.0", features = ["collector_client", "isahc_collector_client"]}
+opentelemetry = { version = "0.22.0", features = ["trace", "metrics"] }
+opentelemetry-otlp = { version = "0.15.0", features = ["trace", "metrics"] }
+opentelemetry_sdk = { version = "0.22.1", features = ["rt-tokio", "trace", "metrics"] }
 prometheus = { version = "0.13.3", features = ["process"] }
-pulldown-cmark = "0.9.2"
+pulldown-cmark = "0.10.2"
 regex = "1.7.2"
 serde = "1.0.144"
 serde_derive = "1.0.144"
@@ -25,7 +26,7 @@ tera = { version = "1.19.1", features = ["builtins"] }
 tokio = { version = "1.34.0", features = ["full", "tracing"] }
 toml = "0.8.8"
 tower = { version = "0.4.13", features = ["full"] }
-tower-http = { version = "0.4.4", features = ["full"] }
+tower-http = { version = "0.5.2", features = ["full"] }
 tracing = "0.1.35"
-tracing-opentelemetry = "0.22.0"
+tracing-opentelemetry = "0.23.0"
 tracing-subscriber = { version = "0.3.17", features = ["fmt", "env-filter", "json", "tracing-log"] }

fly.toml

@@ -0,0 +1,18 @@
+# fly.toml app configuration file generated for cool-glade-6208 on 2023-06-24T10:46:20+02:00
+#
+# See https://fly.io/docs/reference/configuration/ for information about how to use this file.
+#
+
+app = "cool-glade-6208"
+primary_region = "arn"
+
+[http_service]
+  internal_port = 8080
+  force_https = true
+  auto_stop_machines = true
+  auto_start_machines = true
+  min_machines_running = 0
+
+[metrics]
+  port = 8180
+  path = "/metrics"

src/feed.rs

@@ -1,4 +1,4 @@
-use color_eyre::Result;
+use anyhow::Result;
 use serde_derive::Serialize;
 
 use tracing::instrument;
@@ -16,7 +16,11 @@ struct FeedContext<'a> {
 
 #[instrument(skip(state))]
 pub fn render_atom_feed(state: &AppState) -> Result<String> {
-    let mut posts: Vec<_> = state.posts.values().filter(|p| !p.draft && p.is_published()).collect();
+    let mut posts: Vec<_> = state
+        .posts
+        .values()
+        .filter(|p| !p.draft && p.is_published())
+        .collect();
 
     posts.sort_by_key(|p| &p.date);
     posts.reverse();

src/handlers/mod.rs

@@ -1,7 +1,7 @@
 use axum::{
-    body,
-    extract::State,
-    http::{header, HeaderMap, Request, StatusCode},
+    body::Body,
+    extract::{Request, State},
+    http::{header, HeaderMap, StatusCode},
     middleware::Next,
     response::{Html, IntoResponse, Response},
     routing::get,
@@ -14,7 +14,7 @@ use std::sync::Arc;
 use tower_http::services::ServeDir;
 use tracing::{
     instrument,
-    log::{error, info, debug},
+    log::{debug, error, info},
 };
 
 use crate::{AppState, WebsiteError};
@@ -22,14 +22,16 @@ use crate::{AppState, WebsiteError};
 pub mod posts;
 pub mod tags;
 
-pub static HIT_COUNTER: Lazy<IntCounterVec> = Lazy::new(|| prometheus::register_int_counter_vec!(
+pub static HIT_COUNTER: Lazy<IntCounterVec> = Lazy::new(|| {
+    prometheus::register_int_counter_vec!(
         opts!(
             "http_requests_total",
             "Total amount of http requests received"
         ),
         &["route", "method", "status"]
     )
-.unwrap());
+    .unwrap()
+});
 
 pub fn routes(state: &Arc<AppState>) -> Router<Arc<AppState>> {
     Router::new()
@@ -38,14 +40,8 @@ pub fn routes(state: &Arc<AppState>) -> Router<Arc<AppState>> {
         .merge(tags::router())
         .merge(posts::alias_router(state.posts.values()))
         .route("/healthcheck", get(healthcheck))
-        .route_service(
-            "/posts/:slug/*path",
-            ServeDir::new("./"),
-        )
-        .route_service(
-            "/static/*path",
-            ServeDir::new("./"),
-        )
+        .route_service("/posts/:slug/*path", ServeDir::new("./"))
+        .route_service("/static/*path", ServeDir::new("./"))
         .layer(axum::middleware::from_fn(metrics_middleware))
         .route("/metrics", get(metrics))
 }
@@ -86,7 +82,7 @@ async fn metrics() -> impl IntoResponse {
     Response::builder()
         .status(200)
         .header(header::CONTENT_TYPE, encoder.format_type())
-        .body(body::boxed(body::Full::from(buffer)))
+        .body(Body::from(buffer))
         .unwrap()
 }
 
@@ -95,7 +91,7 @@ pub async fn not_found() -> impl IntoResponse {
 }
 
 #[instrument(skip(request, next))]
-pub async fn metrics_middleware<B>(request: Request<B>, next: Next<B>) -> Response {
+pub async fn metrics_middleware(request: Request, next: Next) -> Response {
     let path = request.uri().path().to_string();
     let method = request.method().clone();
 

src/handlers/posts.rs

@@ -37,8 +37,8 @@ pub fn alias_router<'a>(posts: impl IntoIterator<Item = &'a Post>) -> Router<Arc
             router = router.route(
                 alias,
                 get(move || async {
-                    let path = path;
-                    Redirect::permanent(&path)
+                    let p = path;
+                    Redirect::permanent(&p)
                 }),
             );
         }
@@ -56,7 +56,11 @@ pub async fn index(
     State(state): State<Arc<AppState>>,
     headers: HeaderMap,
 ) -> Result<Response, WebsiteError> {
-    let mut posts: Vec<&Post> = state.posts.values().filter(|p| !p.draft && p.is_published()).collect();
+    let mut posts: Vec<&Post> = state
+        .posts
+        .values()
+        .filter(|p| !p.draft && p.is_published())
+        .collect();
 
     let last_changed = posts.iter().filter_map(|p| p.last_modified()).max();
 
@@ -76,15 +80,11 @@ pub async fn index(
 
     let res = state.tera.render("posts_index.html", &c)?;
 
-
     Ok((
         StatusCode::OK,
         [(
             header::LAST_MODIFIED,
-            last_changed.map_or_else(
-                || state.startup_time.to_rfc2822(),
-                |d| d.to_rfc2822(),
-            ),
+            last_changed.map_or_else(|| state.startup_time.to_rfc2822(), |d| d.to_rfc2822()),
         )],
         Html(res),
     )
@@ -116,10 +116,7 @@ pub async fn view(
         StatusCode::OK,
         [(
             header::LAST_MODIFIED,
-            last_changed.map_or_else(
-                || state.startup_time.to_rfc2822(),
-                |d| d.to_rfc2822(),
-            ),
+            last_changed.map_or_else(|| state.startup_time.to_rfc2822(), |d| d.to_rfc2822()),
         )],
         Html(res),
     )
@@ -131,7 +128,11 @@ pub async fn feed(
     State(state): State<Arc<AppState>>,
     headers: HeaderMap,
 ) -> Result<Response, WebsiteError> {
-    let mut posts: Vec<&Post> = state.posts.values().filter(|p| !p.draft && p.is_published()).collect();
+    let mut posts: Vec<&Post> = state
+        .posts
+        .values()
+        .filter(|p| !p.draft && p.is_published())
+        .collect();
 
     let last_changed = posts.iter().filter_map(|p| p.last_modified()).max();
 
@@ -149,10 +150,7 @@ pub async fn feed(
             (header::CONTENT_TYPE, "application/atom+xml"),
             (
                 header::LAST_MODIFIED,
-                &last_changed.map_or_else(
-                    || state.startup_time.to_rfc2822(),
-                    |d| d.to_rfc2822(),
-                ),
+                &last_changed.map_or_else(|| state.startup_time.to_rfc2822(), |d| d.to_rfc2822()),
             ),
         ],
         crate::feed::render_atom_feed(&state)?,

src/handlers/tags.rs

@@ -85,10 +85,7 @@ pub async fn view(
         StatusCode::OK,
         [(
             header::LAST_MODIFIED,
-            &last_changed.map_or_else(
-                || state.startup_time.to_rfc2822(),
-                |d| d.to_rfc2822(),
-            ),
+            &last_changed.map_or_else(|| state.startup_time.to_rfc2822(), |d| d.to_rfc2822()),
         )],
         Html(res),
     )
@@ -125,10 +122,7 @@ pub async fn feed(
             (header::CONTENT_TYPE, "application/atom+xml"),
             (
                 header::LAST_MODIFIED,
-                &last_changed.map_or_else(
-                    || state.startup_time.to_rfc2822(),
-                    |d| d.to_rfc2822(),
-                ),
+                &last_changed.map_or_else(|| state.startup_time.to_rfc2822(), |d| d.to_rfc2822()),
             ),
         ],
         crate::feed::render_atom_tag_feed(tag, &state)?,

src/helpers.rs

@@ -36,23 +36,32 @@ pub fn uri_with_path(uri: &Uri, path: &str) -> Uri {
 mod tests {
     use axum::http::Uri;
 
-    use crate::helpers::uri_with_path;
+    use super::*;
 
     #[test]
     fn uri_with_relative_path() {
         let uri: Uri = "http://localhost/baba/".parse().unwrap();
-        assert_eq!(uri_with_path(&uri, "is/you").to_string(), "http://localhost/baba/is/you");
+        assert_eq!(
+            uri_with_path(&uri, "is/you").to_string(),
+            "http://localhost/baba/is/you"
+        );
     }
 
     #[test]
     fn uri_with_absolute_path() {
         let uri: Uri = "http://localhost/baba/is/you".parse().unwrap();
-        assert_eq!(uri_with_path(&uri, "/keke/is/move").to_string(), "http://localhost/keke/is/move");
+        assert_eq!(
+            uri_with_path(&uri, "/keke/is/move").to_string(),
+            "http://localhost/keke/is/move"
+        );
     }
 
     #[test]
     fn uri_with_index_relative_path() {
         let uri: Uri = "http://localhost/baba/is/you".parse().unwrap();
-        assert_eq!(uri_with_path(&uri, "happy").to_string(), "http://localhost/baba/is/happy");
+        assert_eq!(
+            uri_with_path(&uri, "happy/and/you").to_string(),
+            "http://localhost/baba/is/happy/and/you"
+        );
     }
 }

src/hilighting.rs

@@ -2,7 +2,7 @@ use syntect::{highlighting::ThemeSet, parsing::SyntaxSet};
 use tracing::{error, instrument};
 
 #[instrument(skip(content, lang, theme))]
-pub fn hilight(content: &str, lang: &str, theme: Option<&str>) -> color_eyre::Result<String> {
+pub fn hilight(content: &str, lang: &str, theme: Option<&str>) -> anyhow::Result<String> {
     let ss = SyntaxSet::load_defaults_newlines();
     let s = ss
         .find_syntax_by_extension(lang)

src/main.rs

@@ -1,31 +1,26 @@
 #![warn(clippy::pedantic)]
-#![allow(clippy::unused_async)] // axum handlers needs async, even if no awaiting happens
-use std::{collections::HashMap, fmt::Display, sync::Arc, time::Duration};
+use std::{collections::HashMap, fmt::Display, sync::Arc};
 
-use axum::{
-    body::Body,
-    extract::{MatchedPath, OriginalUri},
-    http::{uri::PathAndQuery, Request, Uri},
-    response::Response,
-};
+use axum::http::Uri;
 use chrono::DateTime;
-use color_eyre::eyre::{Error, Result};
 
 use config::Config;
 use post::Post;
 
 use tag::Tag;
 use tera::Tera;
-use tower_http::{compression::CompressionLayer, cors::CorsLayer};
-use tracing::{field::Empty, info_span, log::info, Span, instrument};
 
-use tracing_subscriber::{prelude::*, EnvFilter};
+use tower_http::{compression::CompressionLayer, cors::CorsLayer};
+use tracing::{instrument, log::info};
+
+use anyhow::{Error, Result};
 
 mod feed;
 mod handlers;
 mod helpers;
 mod hilighting;
 mod markdown;
+mod observability;
 mod post;
 mod tag;
 
@@ -40,28 +35,24 @@ pub struct AppState {
 
 #[tokio::main]
 async fn main() -> Result<()> {
-    color_eyre::install()?;
     let cfg = Config::builder()
         .add_source(config::File::with_name("config.toml"))
         .add_source(config::Environment::with_prefix("WEBSITE"))
         .build()?;
 
-    init_tracing(&cfg);
+    observability::init_tracing(&cfg);
     info!("Starting server...");
-
+    let addr = cfg.get_string("bind_address")?;
     let app = init_app(&cfg).await?;
-    axum::Server::bind(&cfg.get_string("bind_address")?.parse().unwrap())
-        .serve(app.into_make_service())
-        .await?;
+    let listener = tokio::net::TcpListener::bind(addr).await.unwrap();
+    axum::serve(listener, app.into_make_service()).await?;
 
     Ok(())
 }
 
 #[instrument]
 async fn init_app(cfg: &Config) -> Result<axum::routing::Router> {
-    let base_url: Uri = cfg.get_string("base_url")?
-        .parse()
-        .unwrap();
+    let base_url: Uri = cfg.get_string("base_url")?.parse().unwrap();
 
     let tera = Tera::new("templates/**/*")?;
     let mut state = AppState {
@@ -83,69 +74,12 @@ async fn init_app(cfg: &Config) -> Result<axum::routing::Router> {
         .layer(CompressionLayer::new())
         .layer(
             tower_http::trace::TraceLayer::new_for_http()
-                .make_span_with(make_span)
-                .on_response(on_response),
+                .make_span_with(observability::make_span)
+                .on_response(observability::on_response),
         )
         .with_state(state.clone()))
 }
 
-fn init_tracing(cfg: &Config) {
-    let filter = if let Ok(filter) = cfg.get_string("logging") {
-        EnvFilter::builder()
-            .with_default_directive("info".parse().unwrap())
-            .parse_lossy(filter)
-    } else {
-        EnvFilter::builder()
-            .with_default_directive("info".parse().unwrap())
-            .from_env_lossy()
-    };
-
-    opentelemetry::global::set_text_map_propagator(opentelemetry_jaeger::Propagator::new());
-
-    let tracer = opentelemetry_jaeger::new_agent_pipeline()
-        .with_service_name("website")
-        .install_simple().unwrap();
-
-    let otel = tracing_opentelemetry::layer().with_tracer(tracer);
-
-    tracing_subscriber::registry()
-        .with(filter)
-        .with(otel)
-        .with(tracing_subscriber::fmt::layer())
-        .init();
-}
-
-
-fn make_span(request: &Request<Body>) -> Span {
-    let uri = if let Some(OriginalUri(uri)) = request.extensions().get::<OriginalUri>() {
-        uri
-    } else {
-        request.uri()
-    };
-    let route = request
-        .extensions()
-        .get::<MatchedPath>()
-        .map_or(uri.path(), axum::extract::MatchedPath::as_str);
-    let method = request.method().as_str();
-    let target = uri
-        .path_and_query()
-        .map_or(uri.path(), PathAndQuery::as_str);
-    let name = format!("{method} {route}");
-
-    info_span!(
-        "request",
-        otel.name = %name,
-        http.route = %route,
-        http.method = %method,
-        http.target = %target,
-        http.status_code = Empty
-    )
-}
-
-fn on_response(response: &Response, _latency: Duration, span: &Span) {
-    span.record("http.status_code", response.status().as_str());
-}
-
 #[derive(Debug)]
 pub enum WebsiteError {
     NotFound,
@@ -176,8 +110,8 @@ impl From<tera::Error> for WebsiteError {
     }
 }
 
-impl From<color_eyre::Report> for WebsiteError {
-    fn from(value: color_eyre::Report) -> Self {
+impl From<Error> for WebsiteError {
+    fn from(value: Error) -> Self {
         WebsiteError::InternalError(value)
     }
 }

src/markdown.rs

@@ -2,8 +2,10 @@ use crate::helpers;
 use crate::hilighting;
 use axum::http::Uri;
 use cached::once_cell::sync::Lazy;
+use pulldown_cmark::CodeBlockKind;
 use pulldown_cmark::Event;
 use pulldown_cmark::Tag;
+use pulldown_cmark::TagEnd;
 use pulldown_cmark::{Options, Parser};
 use regex::Regex;
 use tracing::instrument;
@@ -24,46 +26,65 @@ pub fn render_markdown_to_html(base_uri: Option<&Uri>, markdown: &str) -> String
     let mut content_html = String::new();
     let parser = Parser::new_ext(markdown, opt);
 
-    let mut code_block = false;
     let mut code_lang = None;
     let mut code_accumulator = String::new();
     let mut events = Vec::new();
     for event in parser {
         match event {
             Event::Text(text) => {
-                if code_block {
+                if code_lang.is_some() {
                     code_accumulator.push_str(&text);
                 } else {
                     events.push(Event::Text(text));
                 }
             }
-            Event::Start(Tag::Link(t, mut link, title)) => {
+            Event::Start(Tag::Link {
+                mut dest_url,
+                link_type,
+                title,
+                id,
+            }) => {
                 if let Some(uri) = base_uri {
-                    if !link.starts_with('#') && !STARTS_WITH_SCHEMA_RE.is_match(&link) && !EMAIL_RE.is_match(&link) {
+                    if !dest_url.starts_with('#')
+                        && !STARTS_WITH_SCHEMA_RE.is_match(&dest_url)
+                        && !EMAIL_RE.is_match(&dest_url)
+                    {
                         // convert relative URIs to absolute URIs
-                        link = helpers::uri_with_path(uri, &link).to_string().into();
+                        dest_url = helpers::uri_with_path(uri, &dest_url).to_string().into();
                     }
                 }
-                events.push(Event::Start(Tag::Link(t, link, title)));
+                events.push(Event::Start(Tag::Link {
+                    dest_url,
+                    link_type,
+                    title,
+                    id,
+                }));
             }
-            Event::Start(Tag::Image(t, mut link, title)) => {
+            Event::Start(Tag::Image {
+                link_type,
+                mut dest_url,
+                title,
+                id,
+            }) => {
                 if let Some(uri) = base_uri {
-                    if !link.contains("://") && !link.contains('@') {
+                    if !dest_url.contains("://") && !dest_url.contains('@') {
                         // convert relative URIs to absolute URIs
-                        link = helpers::uri_with_path(uri, &link).to_string().into();
+                        dest_url = helpers::uri_with_path(uri, &dest_url).to_string().into();
                     }
                 }
-                events.push(Event::Start(Tag::Image(t, link, title)));
+                events.push(Event::Start(Tag::Image {
+                    link_type,
+                    dest_url,
+                    title,
+                    id,
+                }));
             }
             Event::Start(Tag::CodeBlock(kind)) => {
-                code_block = true;
-                if let pulldown_cmark::CodeBlockKind::Fenced(lang) = kind {
+                if let CodeBlockKind::Fenced(lang) = kind {
                     code_lang = Some(lang);
                 }
             }
-            Event::End(Tag::CodeBlock(_)) => {
-                code_block = false;
-
+            Event::End(TagEnd::CodeBlock) => {
                 let lang = code_lang.take().unwrap_or("".into());
                 let res = hilighting::hilight(&code_accumulator, &lang, Some("base16-ocean.dark"))
                     .unwrap();

src/observability.rs

@@ -0,0 +1,70 @@
+use std::time::Duration;
+
+use axum::{
+    extract::{MatchedPath, OriginalUri, Request},
+    http::uri::PathAndQuery,
+    response::Response,
+};
+use config::Config;
+use opentelemetry::global;
+use opentelemetry_sdk::propagation::TraceContextPropagator;
+use tracing::{field::Empty, info_span, Span};
+use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt, EnvFilter};
+
+pub fn init_tracing(cfg: &Config) {
+    let filter = if let Ok(filter) = cfg.get_string("logging") {
+        EnvFilter::builder()
+            .with_default_directive("info".parse().unwrap())
+            .parse_lossy(filter)
+    } else {
+        EnvFilter::builder()
+            .with_default_directive("info".parse().unwrap())
+            .from_env_lossy()
+    };
+
+    global::set_text_map_propagator(TraceContextPropagator::new());
+
+    let tracer = opentelemetry_otlp::new_pipeline()
+        .tracing()
+        .with_exporter(opentelemetry_otlp::new_exporter().tonic())
+        .install_batch(opentelemetry_sdk::runtime::Tokio)
+        .unwrap();
+
+    let otel = tracing_opentelemetry::layer().with_tracer(tracer);
+
+    tracing_subscriber::registry()
+        .with(filter)
+        .with(otel)
+        .with(tracing_subscriber::fmt::layer())
+        .init();
+}
+
+pub fn make_span(request: &Request) -> Span {
+    let uri = if let Some(OriginalUri(uri)) = request.extensions().get::<OriginalUri>() {
+        uri
+    } else {
+        request.uri()
+    };
+    let route = request
+        .extensions()
+        .get::<MatchedPath>()
+        .map_or(uri.path(), axum::extract::MatchedPath::as_str);
+    let method = request.method().as_str();
+    let target = uri
+        .path_and_query()
+        .map_or(uri.path(), PathAndQuery::as_str);
+    let name = format!("{method} {route}");
+
+    info_span!(
+        "request",
+        otel.name = %name,
+        http.route = %route,
+        http.method = %method,
+        http.target = %target,
+        http.status_code = Empty
+    )
+}
+
+pub fn on_response(response: &Response, _latency: Duration, span: &Span) {
+    span.record("http.status_code", response.status().as_str());
+}

src/post.rs

@@ -1,5 +1,7 @@
 use std::{collections::HashMap, path::Path};
 
+use anyhow::Result;
+
 use cached::once_cell::sync::Lazy;
 use chrono::{DateTime, FixedOffset};
 use glob::glob;
@@ -15,10 +17,9 @@ use tracing::{
 
 use crate::{helpers, markdown, AppState, WebsiteError};
 
-static FRONTMATTER_REGEX: Lazy<Regex> = Lazy::new(|| Regex::new(
-    r"^[\s]*\+{3}(\r?\n(?s).*?(?-s))\+{3}[\s]*(?:$|(?:\r?\n((?s).*(?-s))$))"
-)
-.unwrap());
+static FRONTMATTER_REGEX: Lazy<Regex> = Lazy::new(|| {
+    Regex::new(r"^[\s]*\+{3}(\r?\n(?s).*?(?-s))\+{3}[\s]*(?:$|(?:\r?\n((?s).*(?-s))$))").unwrap()
+});
 
 #[derive(Deserialize, Debug, Default)]
 pub struct TomlFrontMatter {
@@ -76,7 +77,7 @@ impl Post {
 }
 
 #[instrument(skip(state))]
-pub async fn load_all(state: &AppState) -> color_eyre::eyre::Result<HashMap<String, Post>> {
+pub async fn load_all(state: &AppState) -> Result<HashMap<String, Post>> {
     let mut res = HashMap::<String, Post>::new();
     for path in glob("posts/**/*.md")? {
         let path = path.unwrap();
@@ -101,7 +102,7 @@ pub async fn load_all(state: &AppState) -> color_eyre::eyre::Result<HashMap<Stri
 }
 
 #[instrument(skip(state))]
-pub async fn load_post(state: &AppState, slug: &str) -> color_eyre::eyre::Result<Post> {
+pub async fn load_post(state: &AppState, slug: &str) -> Result<Post> {
     debug!("loading post: {slug}");
 
     let file_path = Path::new("posts").join(slug);
@@ -127,9 +128,7 @@ pub async fn load_post(state: &AppState, slug: &str) -> color_eyre::eyre::Result
 }
 
 #[instrument(skip(src))]
-fn parse_frontmatter(
-    src: String,
-) -> color_eyre::eyre::Result<(Option<TomlFrontMatter>, Option<String>)> {
+fn parse_frontmatter(src: String) -> Result<(Option<TomlFrontMatter>, Option<String>)> {
     Ok(if let Some(captures) = FRONTMATTER_REGEX.captures(&src) {
         (
             Some(toml::from_str(captures.get(1).unwrap().as_str())?),