.gitignore

@@ -1,3 +1,2 @@
-/output
 /target
 /untracked

Cargo.toml

@@ -5,17 +5,8 @@ edition = "2024"
 
 [dependencies]
 anyhow = "1.0.98"
-base64 = "0.22.1"
 chrono = "0.4.41"
-chrono-tz = { version = "0.10.4", features = ["serde"] }
+chrono-tz = "0.10.4"
 clap = { version = "4.5.43", features = ["derive"] }
 icalendar = { version = "0.17.1", features = ["chrono-tz", "parser", "serde"] }
-maud = "0.27.0"
-reqwest = "0.12.22"
 rrule = "0.14.0"
-serde = { version = "1.0.219", features = ["derive"] }
-tokio = { version = "1.47.1", features = ["rt-multi-thread", "time"] }
-toml = "0.9.5"
-tracing = "0.1.41"
-tracing-subscriber = { version = "0.3.19", features = ["env-filter"] }
-url = { version = "2.5.4", features = ["serde"] }

README.md

@@ -1,8 +1,21 @@
-todo
+Merges multiple ics files into one stream
 
-- [ ] Rewrite README considering best practices
-- [ ] Add dynamic OpenGraph meta tags
-- [ ] HTML templating for faster styling
-- [ ] Maybe put descriptions behind `details` tag
-- [ ] Publish ICS to subscribe to?
-- [ ] systemd unit or something
+Try `cargo run -- ics-debug --tz America/New_York sample-data/nascar.ics sample-data/formula-1.ics`
+
+Expected output is the next month or so of NASCAR and Formula 1 racing:
+
+```
+2025-08-03 00:00:00 EDT - NASCAR Cup - Iowa Corn 350
+2025-08-03 00:00:00 EDT - F1 - Lenovo Hungarian Grand Prix
+2025-08-10 00:00:00 EDT - NASCAR Cup - Go Bowling At The Glen (Watkins Glen)
+2025-08-16 00:00:00 EDT - NASCAR Cup - Cook Out 400 (Richmond)
+2025-08-23 00:00:00 EDT - NASCAR Cup - Coke Zero Sugar 400 (Daytona)
+2025-08-31 00:00:00 EDT - NASCAR Cup -Playoff- Southern 500 (Darlington)
+2025-08-31 00:00:00 EDT - F1 - Heineken Dutch Grand Prix
+2025-09-07 00:00:00 EDT - NASCAR Cup -Playoff- Enjoy Illinois 300 (Gateway)
+2025-09-07 00:00:00 EDT - F1 - Gran Premio d'Italia
+2025-09-13 00:00:00 EDT - NASCAR Cup -Playoff- Bass Pro Shops Night Race (Bristol)
+2025-09-21 00:00:00 EDT - F1 - Qatar Airways Azerbaijan Grand Prix
+```
+
+If the sample data is old, try the iCal links from <https://toomuchracing.com/calendar/>, e.g. `curl https://calendar.google.com/calendar/ical/fa9bjl6tu13dd10b066stoo5do%40group.calendar.google.com/public/basic.ics > sample-data/formula-1.ics`

src/main.rs

@@ -1,69 +1,27 @@
 use anyhow::{Context as _, Result, anyhow, bail};
-use base64::Engine as _;
 use chrono::{DateTime, TimeZone as _, Utc};
 use clap::Parser as _;
-use icalendar::{Component as _, EventLike as _};
-use serde::Deserialize;
+use icalendar::Component as _;
 use std::{
-    collections::BTreeSet, io::Write as _, path::PathBuf, str::FromStr as _, time::Duration,
+    convert::TryInto as _,
+    path::{Path, PathBuf},
+    str::FromStr,
+    time::Duration,
 };
 
-#[cfg(test)]
-mod tests;
-
-#[derive(Clone, Deserialize)]
-struct ConfigIcal {
-    /// Disk location to cache the ics file for debugging
-    file_path: PathBuf,
-
-    /// Magical ID we pass to Google to deep-link to Google Calendar events
-    google_id: Option<String>,
-
-    /// A canonical webpage we can direct users to
-    html_url: Option<url::Url>,
-
-    /// Very short name for putting on each event
-    short_name: String,
-
-    /// URL to scrape to download the ics file
-    ics_url: url::Url,
-}
-
-#[derive(Deserialize)]
-struct ConfigOutput {
-    /// Used as the OpenGraph description in meta tags
-    description: String,
-
-    /// Timezone to use for output (e.g. "Antarctica/South_Pole")
-    ///
-    /// <https://en.wikipedia.org/wiki/List_of_tz_database_time_zones>
-    timezone: chrono_tz::Tz,
-
-    /// Used as the page title and OpenGraph title in meta tags
-    title: String,
-}
-
-#[derive(Deserialize)]
-struct Config {
-    icals: Vec<ConfigIcal>,
-    output: ConfigOutput,
-}
-
-#[derive(clap::Parser)]
-struct CliAuto {
-    #[arg(long)]
-    config: PathBuf,
-}
-
 #[derive(clap::Parser)]
 struct CliIcsDebug {
+    /// Timezone to use for output (e.g. "Antarctica/South_Pole")
+    ///
+    /// <https://en.wikipedia.org/wiki/List_of_tz_database_time_zones>
     #[arg(long)]
-    config: PathBuf,
+    tz: String,
+
+    ics_paths: Vec<PathBuf>,
 }
 
 #[derive(clap::Subcommand)]
 enum Commands {
-    Auto(CliAuto),
     IcsDebug(CliIcsDebug),
 }
 
@@ -74,580 +32,203 @@ struct Cli {
     command: Commands,
 }
 
+struct EventInstance {
+    dtstart: DateTime<chrono_tz::Tz>,
+    summary: String,
+}
+
 struct Parameters {
     /// Events before this time will be ignored if they cause an error
-    ignore_before: DateTime<chrono_tz::Tz>,
+    ignore_before: DateTime<rrule::Tz>,
 
     /// Events before this time will not be shown
-    output_start: DateTime<chrono_tz::Tz>,
+    output_start: DateTime<rrule::Tz>,
 
     /// Events after this time will not be shown
-    output_stop: DateTime<chrono_tz::Tz>,
+    output_stop: DateTime<rrule::Tz>,
 
     tz: chrono_tz::Tz,
 }
 
-impl Parameters {
-    fn new(now: DateTime<chrono_tz::Tz>) -> Result<Self> {
-        // Snap the cutoffs to midnight so we won't present half of a day
-        let midnight = chrono::NaiveTime::default();
-        let output_start = (now - Duration::from_secs(86_400 * 2))
-            .with_time(midnight)
-            .single()
-            .context("output_start doesn't map to a single time in our timezone")?;
-        let output_stop = (now + Duration::from_secs(86_400 * 45))
-            .with_time(midnight)
-            .single()
-            .context("output_stop doesn't map to a single time in our timezone")?;
-
-        Ok(Parameters {
-            ignore_before: now - Duration::from_secs(86_400 * 365 * 2),
-            output_start,
-            output_stop,
-            tz: now.timezone(),
-        })
-    }
-}
-
-/// Similar to `icalendar::DatePerhapsTime` but doesn't allow Floating, and naive dates are stored as local midnight with an "all day" flag
-#[derive(Clone, Copy, Debug, Ord, PartialOrd, Eq, PartialEq)]
-struct DatePerhapsTime {
-    dt: DateTime<chrono_tz::Tz>,
-    all_day: bool,
-}
-
-impl DatePerhapsTime {
-    fn date_naive(&self) -> chrono::NaiveDate {
-        self.dt.date_naive()
-    }
-
-    /// Returns None for all-day events
-    fn time(&self) -> Option<chrono::NaiveTime> {
-        if self.all_day {
-            None
-        } else {
-            Some(self.dt.time())
-        }
-    }
-}
-
-fn normalize_date_perhaps_time(
-    x: &icalendar::DatePerhapsTime,
-    tz: chrono_tz::Tz,
-) -> Result<DatePerhapsTime> {
-    Ok(match x {
-        icalendar::DatePerhapsTime::DateTime(x) => {
-            let dt = x
-                .try_into_utc()
-                .context("Data error - Could not convert event datetime to UTC")?
-                .with_timezone(&tz);
-            DatePerhapsTime { dt, all_day: false }
-        }
-        icalendar::DatePerhapsTime::Date(date) => {
-            let midnight = chrono::NaiveTime::default();
-            let dt = tz.from_local_datetime(&date.and_time(midnight)).single().context("DateTime doesn't map to a single unambiguous datetime when converting to our timezone")?;
-            DatePerhapsTime { dt, all_day: true }
-        }
-    })
-}
-
-fn recurring_dates_opt(
+fn _recurring_event(
     params: &Parameters,
     ev: &icalendar::Event,
     rrule: &icalendar::Property,
-) -> Result<Option<impl Iterator<Item = DatePerhapsTime>>> {
+) -> Result<Vec<DateTime<chrono_tz::Tz>>> {
+    let dtstart = ev
+        .properties()
+        .get("DTSTART")
+        .context("Data error - Event has no DTSTART")?;
+    let dtstart_s: String = dtstart
+        .clone()
+        .try_into()
+        .context("Bug - Can't roundtrip DTSTART")?;
+    let rrule_s: String = rrule
+        .clone()
+        .try_into()
+        .context("Bug - Can't roundtrip RRULE")?;
+
+    let set_s = format!("{dtstart_s}{rrule_s}");
+    let rrule = rrule::RRuleSet::from_str(&set_s)
+        .with_context(|| format!("RRuleSet parse failed `{set_s}`"))?;
+
+    let recurrences = rrule
+        .after(params.output_start)
+        .before(params.output_stop)
+        .all(10)
+        .dates;
+    let mut instances = vec![];
+    for dtstart in recurrences {
+        let dtstart = dtstart.with_timezone(&params.tz);
+        instances.push(dtstart);
+    }
+    Ok(instances)
+}
+
+fn recurring_event(
+    params: &Parameters,
+    ev: &icalendar::Event,
+    rrule: &icalendar::Property,
+) -> Result<Vec<DateTime<chrono_tz::Tz>>> {
     let dtstart = ev
         .get_start()
         .context("Data error - Event has no DTSTART")?;
-    let all_day = match &dtstart {
-        icalendar::DatePerhapsTime::Date(_) => true,
-        icalendar::DatePerhapsTime::DateTime(_) => false,
-    };
-    let dtstart_norm = normalize_date_perhaps_time(&dtstart, params.tz)?;
+    let dtstart = normalize_date_perhaps_time(dtstart, &params.tz)?;
 
     let rr = rrule::RRule::from_str(rrule.value())
         .with_context(|| format!("RRule parse failed `{}`", rrule.value()))?;
 
-    if let Some(until) = rr.get_until()
-        && *until < params.output_start
-    {
-        // This skips over some bad data in our test set where we fail to parse a recurring event that's already ended before our output window starts
-        return Ok(None);
+    if let Some(until) = rr.get_until() {
+        if *until < params.output_start {
+            return Ok(vec![]);
+        }
     }
 
-    let rrule_tz = params.tz.into();
+    let dtstart = dtstart.with_timezone(&rrule::Tz::Tz(params.tz));
 
-    let rr = rr.build(dtstart_norm.dt.with_timezone(&rrule_tz))?;
-    let dates = rr
-        .after(params.output_start.with_timezone(&rrule_tz))
-        .before(params.output_stop.with_timezone(&rrule_tz))
+    let rr = rr.build(dtstart)?;
+    let recurrences = rr
+        .after(params.output_start)
+        .before(params.output_stop)
         .all(10)
-        .dates
-        .into_iter()
-        .map(move |dtstart| DatePerhapsTime {
-            dt: dtstart.with_timezone(&params.tz),
-            all_day,
-        });
-    Ok(Some(dates))
-}
-
-fn recurring_dates(
-    params: &Parameters,
-    ev: &icalendar::Event,
-    rrule: &icalendar::Property,
-) -> Result<impl Iterator<Item = DatePerhapsTime>> {
-    Ok(recurring_dates_opt(params, ev, rrule)?
-        .into_iter()
-        .flatten())
-}
-
-/// An event that's been duplicated according to its recurrence rules, so we can sort by datetimes
-struct EventInstance<'a> {
-    dtstart: DatePerhapsTime,
-    ev: &'a icalendar::Event,
-}
-
-impl EventInstance<'_> {
-    fn google_url(&self, google_id: &str) -> Result<Option<String>> {
-        let uid = self.ev.get_uid().context("No UID")?;
-        if uid.len() > 100 {
-            // There's one event in one of our test Google calendars which originates from Microsoft Exchange and has a totally different UID format from any other event. I was not able to reverse it, so I'm skipping it for now.
-            return Ok(None);
-        }
-
-        // Strip off the back part of the Google UID
-        let idx = uid.find(['@', '_']).unwrap_or(uid.len());
-        let uid_2 = &uid[..idx];
-        let utc_dtstart = self
-            .dtstart
-            .dt
-            .with_timezone(&chrono_tz::UTC)
-            .format("%Y%m%dT%H%M%SZ")
-            .to_string();
-        let eid_plain = if self.ev.properties().get("RRULE").is_some() {
-            // Recurring events have an extra timestamp in their base64 to disambiguiate
-            format!("{uid_2}_{utc_dtstart} {google_id}")
-        } else {
-            format!("{uid_2} {google_id}")
-        };
-        let eid = base64::engine::general_purpose::URL_SAFE_NO_PAD.encode(&eid_plain);
-        let mut link = url::Url::parse("https://www.google.com/calendar/event").unwrap();
-        link.query_pairs_mut().append_pair("eid", &eid);
-        Ok(Some(link.to_string()))
+        .dates;
+    let mut instances = vec![];
+    for dtstart in recurrences {
+        let dtstart = dtstart.with_timezone(&params.tz);
+        instances.push(dtstart);
     }
+    Ok(instances)
+}
 
-    fn url(&self, google_id: Option<&str>) -> Result<Option<String>> {
-        if let Some(url) = self.ev.get_url() {
-            return Ok(Some(url.to_string()));
+fn normalize_date_perhaps_time(
+    x: icalendar::DatePerhapsTime,
+    tz: &chrono_tz::Tz,
+) -> Result<DateTime<chrono_tz::Tz>> {
+    Ok(match x {
+        icalendar::DatePerhapsTime::DateTime(x) => x
+            .try_into_utc()
+            .context("Data error - Could not convert event datetime to UTC")?
+            .with_timezone(tz),
+        icalendar::DatePerhapsTime::Date(date) => {
+            let midnight = chrono::NaiveTime::default();
+            match tz.from_local_datetime(&date.and_time(midnight)) {
+                chrono::offset::MappedLocalTime::Single(x) => x,
+                _ => bail!(
+                    "Datetime doesn't map to a single unambiguous datetime when converting to our timezone"
+                ),
+            }
         }
-        if let Some(google_id) = google_id {
-            return self.google_url(google_id);
-        }
-        Ok(None)
-    }
+    })
 }
 
-struct EventWithUrl<'a> {
-    calendar: &'a ConfigIcal,
-    dtstart: DatePerhapsTime,
-    ev: &'a icalendar::Event,
-    url: Option<String>,
-}
-
-impl<'a> EventWithUrl<'a> {
-    fn from_ei(calendar: &'a ConfigIcal, ei: EventInstance<'a>) -> Result<EventWithUrl<'a>> {
-        let url = ei.url(calendar.google_id.as_deref())?;
-        Ok(Self {
-            calendar,
-            dtstart: ei.dtstart,
-            ev: ei.ev,
-            url,
-        })
-    }
-}
-
-fn event_instances<'a>(
-    params: &Parameters,
-    ev: &'a icalendar::Event,
-) -> Result<Vec<EventInstance<'a>>> {
-    let dates = if let Some(rrule) = ev.properties().get("RRULE") {
-        recurring_dates(params, ev, rrule)?.collect()
+fn event_instances(params: &Parameters, ev: &icalendar::Event) -> Result<Vec<EventInstance>> {
+    let instances = if let Some(rrule) = ev.properties().get("RRULE") {
+        recurring_event(params, ev, rrule)?
     } else {
         // Event that occurs once
 
         let dtstart = ev.get_start().context("Data error - Event has no start")?;
-        let dtstart_normalized = normalize_date_perhaps_time(&dtstart, params.tz)?;
-        if dtstart_normalized.dt < params.output_start || dtstart_normalized.dt > params.output_stop
-        {
+        let dtstart = normalize_date_perhaps_time(dtstart, &params.tz)?;
+        if dtstart < params.output_start || dtstart > params.output_stop {
             return Ok(vec![]);
         }
-        vec![dtstart_normalized]
+        vec![dtstart]
     };
 
-    let instances = dates
+    let summary = ev
+        .get_summary()
+        .unwrap_or("Data error BXH45NAR - No summary in event");
+
+    let instances = instances
         .into_iter()
-        .map(|dtstart| EventInstance { dtstart, ev })
+        .map(|dtstart| EventInstance {
+            dtstart,
+            summary: summary.to_string(),
+        })
         .collect();
     Ok(instances)
 }
 
-struct ICal {
-    /// The parsed ics file
-    cal: icalendar::Calendar,
-}
+fn read_ics(params: &Parameters, path: &Path) -> Result<Vec<EventInstance>> {
+    let mut instances = vec![];
 
-/// Used to link recurrence exceptions to the original events they replace
-#[derive(Eq, Ord, PartialOrd, PartialEq)]
-struct RecurrenceKey<'a> {
-    recurrence_id: DatePerhapsTime,
-    uid: &'a str,
-}
+    let s = std::fs::read_to_string(path)?;
+    let cal: icalendar::Calendar = s.parse().map_err(|s| anyhow!("parse error {s}"))?;
 
-impl ICal {
-    fn read_from_str(s: &str) -> Result<Self> {
-        let cal = s.parse().map_err(|s| anyhow!("parse error {s}"))?;
-        let cal = Self { cal };
-        Ok(cal)
-    }
+    for component in &cal.components {
+        let icalendar::CalendarComponent::Event(ev) = component else {
+            continue;
+        };
 
-    fn read_from_config(config: &ConfigIcal) -> Result<Self> {
-        let s = std::fs::read_to_string(&config.file_path)?;
-        Self::read_from_str(&s)
-    }
-
-    fn events(&self) -> impl Iterator<Item = &icalendar::Event> {
-        self.cal.components.iter().filter_map(|comp| {
-            if let icalendar::CalendarComponent::Event(ev) = comp {
-                Some(ev)
-            } else {
-                None
-            }
-        })
-    }
-
-    /// Returns an unsorted list of event instances for this calendar
-    fn event_instances(&self, params: &Parameters) -> Result<Vec<EventInstance<'_>>> {
-        let mut instances = vec![];
-        let mut recurrence_exceptions = BTreeSet::new();
-
-        for ev in self.events() {
-            let eis = match event_instances(params, ev)
-                .with_context(|| format!("Failed to process event with UID '{:?}'", ev.get_uid()))
-            {
-                Ok(x) => x,
-                Err(e) => {
-                    if ev.get_last_modified().context("Event has no timestamp")?
-                        < params.ignore_before
-                    {
-                        tracing::warn!("Ignoring error from very old event {e:?}");
-                        continue;
-                    } else {
-                        Err(e)?
-                    }
+        let eis = match event_instances(params, ev)
+            .with_context(|| format!("Failed to process event with UID '{:?}'", ev.get_uid()))
+        {
+            Ok(x) => x,
+            Err(e) => {
+                if ev.get_last_modified().context("Event has no timestamp")? < params.ignore_before
+                {
+                    eprintln!("Ignoring error from very old event {e:?}");
+                    continue;
+                } else {
+                    Err(e)?
                 }
-            };
-            for ei in eis {
-                instances.push(ei);
-            }
-
-            if let Some(recurrence_id) = ev.get_recurrence_id() {
-                // This is a recurrence exception and we must handle it specially by later deleting the original event it replaces
-                let recurrence_id = normalize_date_perhaps_time(&recurrence_id, params.tz)
-                    .context("We should be able to normalize recurrence IDs")?;
-                let uid = ev
-                    .get_uid()
-                    .context("Every recurrence exception should have a UID")?;
-
-                recurrence_exceptions.insert(RecurrenceKey { recurrence_id, uid });
             }
+        };
+        for ei in eis {
+            instances.push(ei);
         }
-
-        // Find all recurring events that are replaced with recurrence exceptions and delete the originals.
-        // There is probably a not-linear-time way to do this, but this should be fine.
-
-        instances.retain(|ev| {
-            if ev.ev.get_recurrence_id().is_some() {
-                // This is a recurrence exception, exceptions never delete themselves
-                return true;
-            }
-
-            let uid = ev
-                .ev
-                .get_uid()
-                .context(
-                    "Every recurring event should have a UID so we can apply recurrence exceptions",
-                )
-                .unwrap();
-            let key = RecurrenceKey {
-                recurrence_id: ev.dtstart,
-                uid,
-            };
-            !recurrence_exceptions.contains(&key)
-        });
-
-        Ok(instances)
-    }
-}
-
-#[derive(Default)]
-struct Data {
-    icals: Vec<(ICal, ConfigIcal)>,
-}
-
-fn read_data_from_disk(config: &Config) -> Result<Data> {
-    let mut data = Data::default();
-    for config in &config.icals {
-        let cal = ICal::read_from_config(config)?;
-        data.icals.push((cal, config.clone()));
     }
 
-    Ok(data)
+    Ok(instances)
 }
 
-fn process_data(data: &Data, now: DateTime<chrono_tz::Tz>) -> Result<Vec<EventWithUrl<'_>>> {
-    let params = Parameters::new(now)?;
+fn main_ics_debug(cli: CliIcsDebug) -> Result<()> {
+    let tz = cli.tz.parse().context("Couldn't parse timezone name")?;
+
+    let now = Utc::now().with_timezone(&rrule::Tz::Tz(chrono_tz::UTC));
+    let params = Parameters {
+        ignore_before: now - Duration::from_secs(86_400 * 365 * 2),
+        output_start: now - Duration::from_secs(86_400 * 15),
+        output_stop: now + Duration::from_secs(86_400 * 45),
+        tz,
+    };
 
     let mut instances = vec![];
-    for (ical, config) in &data.icals {
-        for ei in ical.event_instances(&params)? {
-            let ei = EventWithUrl::from_ei(config, ei)?;
+
+    for path in cli.ics_paths {
+        let eis =
+            read_ics(&params, &path).with_context(|| format!("Failed to parse file `{path:?}`"))?;
+        for ei in eis {
             instances.push(ei);
         }
     }
 
     instances.sort_by_key(|ei| ei.dtstart);
-    Ok(instances)
-}
 
-// FIXME: Don't print to stdout / stderr
-fn output_html(
-    config: &ConfigOutput,
-    instances: &[EventWithUrl],
-    now: DateTime<chrono_tz::Tz>,
-) -> Result<()> {
-    let today = now.date_naive();
-    let mut last_month_printed: Option<String> = None;
-    let mut last_date_printed = None;
-    let mut html_list = vec![];
-    let mut day_list = vec![];
-    for ei in instances {
-        let summary = ei
-            .ev
-            .get_summary()
-            .unwrap_or("Data error BXH45NAR - No summary in event");
-
-        let date = ei.dtstart.date_naive();
-        let past = date < today;
-        let month = date.format("%B").to_string();
-        match last_month_printed {
-            Some(ref x) if *x == month => {}
-            None | Some(_) => {
-                // FIXME: De-dupe
-                if !day_list.is_empty() {
-                    html_list.push(maud::html! {
-                        ul { @for entry in day_list {
-                            (entry)
-                        } }
-                    });
-                    day_list = vec![];
-                }
-
-                html_list.push(maud::html! {
-                    h2 { (month) }
-                });
-                last_month_printed = Some(month);
-            }
-        }
-        if last_date_printed != Some(date) {
-            // println!("{date}");
-
-            // FIXME: De-dupe
-            if !day_list.is_empty() {
-                html_list.push(maud::html! {
-                    ul { @for entry in day_list {
-                        (entry)
-                    } }
-                });
-                day_list = vec![];
-            }
-            if past {
-                html_list.push(maud::html! {
-                    p class="past"{ s { (date.format("%-d %A")) } }
-                });
-            } else {
-                html_list.push(maud::html! {
-                    h3 { (date.format("%-d %A")) }
-                    hr{}
-                });
-            }
-
-            last_date_printed = Some(date);
-        }
-        let time = ei.dtstart.time();
-        let time = time
-            .map(|t| t.format("%l:%M %P").to_string())
-            .unwrap_or_else(|| "All day".to_string());
-
-        // println!("    {time} - {summary}");
-        let summary = if let Some(url) = &ei.url {
-            maud::html! {a href=(url) {(summary)}}
-        } else {
-            maud::html! {(summary)}
-        };
-
-        let location = ei.ev.get_location();
-
-        if past {
-            day_list.push(maud::html! {
-                li class="past" { (time) " - " (summary) }
-            });
-        } else {
-            let calendar_link = if let Some(html_url) = &ei.calendar.html_url {
-                maud::html! { a href=(html_url) { (ei.calendar.short_name) } }
-            } else {
-                maud::html! { (ei.calendar.short_name)}
-            };
-
-            day_list.push(maud::html! {
-                li { p { (time) " - " (summary) }
-                    ul {
-                        li { (calendar_link) " calendar" }
-                        @if let Some(location) = location {
-                            li { "Location: " (location) }
-                        }
-                    }
-                }
-            });
-        }
+    for instance in instances {
+        let EventInstance { dtstart, summary } = instance;
+        println!("{dtstart} - {summary}");
     }
-    // FIXME: De-dupe
-    if !day_list.is_empty() {
-        html_list.push(maud::html! {
-            ul { @for entry in day_list {
-                (entry)
-            } }
-        });
-    }
-
-    std::fs::create_dir_all("output")?;
-    {
-        let temp_path = "output/index.html.tmp";
-        let final_path = "output/index.html";
-        let mut f = std::fs::File::create(temp_path)?;
-        let css = r#"
-        <style>
-            body { 
-                font-family: sans-serif;
-                font-size: 14pt;
-                line-height: 1.6;
-                max-width: 700px; 
-            }
-            .past {
-                color: #888;
-            }
-        </style>
-        "#;
-
-        let description = &config.description;
-        let title = &config.title;
-
-        let s = maud::html! {
-            html lang="en" {
-                head {
-                    meta http-equiv="Content-Type" content="text/html; charset=utf-8" {}
-                    meta name="viewport" content="width=device-width, initial-scale=1" {}
-                    (maud::PreEscaped(css))
-
-                    meta property="og:locale" content="en" {}
-                    meta property="og:type" content="website" {}
-
-                    meta property="description" content=(description) {}
-                    meta property="og:description" content=(description) {}
-
-                    title { (title) }
-                    met property="og:title" content=(title) {}
-                }
-                body {
-                    h1 { (title) }
-                    p { "Written at: " (now.to_rfc3339()) }
-                    @for entry in html_list {
-                        (entry)
-                    }
-                }
-            }
-        }
-        .into_string();
-
-        f.write_all(s.as_bytes())?;
-        std::fs::rename(temp_path, final_path)?;
-    }
-
-    Ok(())
-}
-
-static APP_USER_AGENT: &str = concat!(
-    env!("CARGO_PKG_NAME"),
-    "_Z7FSRRA7/",
-    env!("CARGO_PKG_VERSION"),
-);
-
-async fn do_everything(cli: &CliAuto) -> Result<()> {
-    let config = std::fs::read_to_string(&cli.config)?;
-    let config: Config = toml::from_str(&config)?;
-
-    tracing::info!(?APP_USER_AGENT);
-    let client = reqwest::Client::builder()
-        .user_agent(APP_USER_AGENT)
-        .build()?;
-    for ical in &config.icals {
-        tracing::info!(url = ical.ics_url.to_string(), "requesting...");
-        let resp = client.get(ical.ics_url.clone()).send().await?;
-        if resp.status() != 200 {
-            bail!("Bad status {}", resp.status());
-        }
-        let bytes = resp.bytes().await?;
-
-        let temp_path = ical.file_path.with_extension(".ics.temp");
-        std::fs::write(&temp_path, &bytes)?;
-        std::fs::rename(&temp_path, &ical.file_path)?;
-    }
-
-    let data = read_data_from_disk(&config)?;
-
-    let tz = &config.output.timezone;
-    let now = Utc::now().with_timezone(tz);
-    let instances = process_data(&data, now)?;
-    output_html(&config.output, &instances, now)?;
-    Ok(())
-}
-
-/// Seconds to sleep between auto cycles
-const SLEEP_SECS: u64 = 9000;
-
-fn main_auto(cli: CliAuto) -> Result<()> {
-    tracing_subscriber::fmt::init();
-    loop {
-        let rt = tokio::runtime::Runtime::new()?;
-        rt.block_on(async {
-            do_everything(&cli).await?;
-            Ok::<_, anyhow::Error>(())
-        })?;
-        rt.shutdown_timeout(Duration::from_secs(10));
-        tracing::info!("The service is eeping");
-        std::thread::sleep(Duration::from_secs(SLEEP_SECS));
-    }
-}
-
-fn main_ics_debug(cli: CliIcsDebug) -> Result<()> {
-    let config = std::fs::read_to_string(&cli.config)?;
-    let config: Config = toml::from_str(&config)?;
-
-    let data = read_data_from_disk(&config)?;
-
-    let tz = &config.output.timezone;
-    let now = Utc::now().with_timezone(tz);
-    let instances = process_data(&data, now)?;
-    output_html(&config.output, &instances, now)?;
 
     Ok(())
 }
@@ -656,7 +237,6 @@ fn main() -> Result<()> {
     let cli = Cli::try_parse()?;
 
     match cli.command {
-        Commands::Auto(x) => main_auto(x),
         Commands::IcsDebug(x) => main_ics_debug(x),
     }
 }

src/tests.rs

@@ -1,180 +0,0 @@
-use super::*;
-
-fn chicago_time(
-    year: i32,
-    month: u32,
-    day: u32,
-    hour: u32,
-    minute: u32,
-    second: u32,
-) -> DateTime<chrono_tz::Tz> {
-    chrono_tz::America::Chicago
-        .with_ymd_and_hms(year, month, day, hour, minute, second)
-        .unwrap()
-}
-
-fn dt_from_ts(ts: i64) -> DateTime<chrono_tz::Tz> {
-    DateTime::from_timestamp(ts, 0)
-        .unwrap()
-        .with_timezone(&chrono_tz::America::Chicago)
-}
-
-/// Expect that parsing a calendar works
-#[test]
-fn calendar_from_str() -> Result<()> {
-    // Blank lines added for clarity
-    let s = r#"
-BEGIN:VCALENDAR
-
-CALSCALE:GREGORIAN
-X-WR-TIMEZONE:America/Chicago
-
-BEGIN:VTIMEZONE
-TZID:America/Chicago
-X-LIC-LOCATION:America/Chicago
-BEGIN:DAYLIGHT
-TZOFFSETFROM:-0600
-TZOFFSETTO:-0500
-TZNAME:CDT
-DTSTART:19700308T020000
-RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
-END:DAYLIGHT
-BEGIN:STANDARD
-TZOFFSETFROM:-0500
-TZOFFSETTO:-0600
-TZNAME:CST
-DTSTART:19701101T020000
-RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
-END:STANDARD
-END:VTIMEZONE
-
-BEGIN:VEVENT
-DTSTART;TZID=America/Chicago:20250908T180000
-DTEND;TZID=America/Chicago:20250908T200000
-UID:Redacted
-RECURRENCE-ID;TZID=America/Chicago:20250901T180000
-CREATED:20241222T171032Z
-LAST-MODIFIED:20250812T021726Z
-SEQUENCE:1
-STATUS:CONFIRMED
-SUMMARY:zero roman mummy hatch
-TRANSP:OPAQUE
-END:VEVENT
-
-END:VCALENDAR
-"#;
-
-    let ical = ICal::read_from_str(s)?;
-    let now = dt_from_ts(1755000000);
-    let params = Parameters::new(now)?;
-    let instances = ical.event_instances(&params)?;
-    assert_eq!(instances.len(), 1);
-
-    let event = &instances[0];
-    let expected_time = DatePerhapsTime {
-        dt: chicago_time(2025, 9, 8, 18, 0, 0),
-        all_day: false,
-    };
-    assert_eq!(event.dtstart, expected_time);
-    assert_eq!(event.ev.get_summary(), Some("zero roman mummy hatch"));
-    Ok(())
-}
-
-/// Expect that recurrent exceptions work correctly and don't duplicate events
-#[test]
-fn recurrence_exceptions() -> Result<()> {
-    let s = r#"
-BEGIN:VCALENDAR
-
-CALSCALE:GREGORIAN
-X-WR-TIMEZONE:America/Chicago
-
-BEGIN:VTIMEZONE
-TZID:America/Chicago
-X-LIC-LOCATION:America/Chicago
-BEGIN:DAYLIGHT
-TZOFFSETFROM:-0600
-TZOFFSETTO:-0500
-TZNAME:CDT
-DTSTART:19700308T020000
-RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
-END:DAYLIGHT
-BEGIN:STANDARD
-TZOFFSETFROM:-0500
-TZOFFSETTO:-0600
-TZNAME:CST
-DTSTART:19701101T020000
-RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
-END:STANDARD
-END:VTIMEZONE
-
-BEGIN:VEVENT
-DTSTART;TZID=America/Chicago:20250708T180000
-DTEND;TZID=America/Chicago:20250708T200000
-RRULE:FREQ=MONTHLY;BYDAY=2TU
-UID:jazz repay stout steam
-CLASS:PUBLIC
-CREATED:20250703T113806Z
-LAST-MODIFIED:20250721T232331Z
-SEQUENCE:1
-STATUS:CONFIRMED
-SUMMARY:coil perm brush zippy
-TRANSP:OPAQUE
-END:VEVENT
-
-BEGIN:VEVENT
-DTSTART;TZID=America/Chicago:20250814T180000
-DTEND;TZID=America/Chicago:20250814T200000
-UID:jazz repay stout steam
-RECURRENCE-ID;TZID=America/Chicago:20250812T180000
-CLASS:PUBLIC
-CREATED:20250703T113806Z
-LAST-MODIFIED:20250721T232500Z
-SEQUENCE:2
-STATUS:CONFIRMED
-SUMMARY:coil perm brush zippy
-TRANSP:OPAQUE
-END:VEVENT
-
-END:VCALENDAR
-"#;
-
-    let ical = ICal::read_from_str(s)?;
-    let params = Parameters {
-        ignore_before: chicago_time(2025, 1, 1, 0, 0, 0),
-        output_start: chicago_time(2025, 7, 1, 0, 0, 0),
-        output_stop: chicago_time(2025, 10, 1, 0, 0, 0),
-        tz: chrono_tz::America::Chicago,
-    };
-    let instances = ical.event_instances(&params)?;
-
-    assert_eq!(
-        [
-            instances[0].dtstart,
-            instances[1].dtstart,
-            instances[2].dtstart,
-        ],
-        [
-            DatePerhapsTime {
-                dt: chicago_time(2025, 7, 8, 18, 0, 0),
-                all_day: false,
-            },
-            DatePerhapsTime {
-                dt: chicago_time(2025, 9, 9, 18, 0, 0),
-                all_day: false,
-            },
-            DatePerhapsTime {
-                dt: chicago_time(2025, 8, 14, 18, 0, 0),
-                all_day: false,
-            },
-        ]
-    );
-
-    for instance in &instances {
-        assert_eq!(instance.ev.get_summary(), Some("coil perm brush zippy"));
-    }
-
-    assert_eq!(instances.len(), 3);
-
-    Ok(())
-}