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handlers.rs
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handlers.rs
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use crate::config::{self, Config, ConfigurationError};
use crate::github::{Event, GithubClient, IssueCommentAction, IssuesAction, IssuesEvent};
use octocrab::Octocrab;
use parser::command::{assign::AssignCommand, Command, Input};
use std::fmt;
use std::sync::Arc;
use tracing as log;
#[derive(Debug)]
pub enum HandlerError {
Message(String),
Other(anyhow::Error),
}
impl std::error::Error for HandlerError {}
impl fmt::Display for HandlerError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
HandlerError::Message(msg) => write!(f, "{}", msg),
HandlerError::Other(_) => write!(f, "An internal error occurred."),
}
}
}
mod assign;
mod autolabel;
mod close;
pub mod docs_update;
mod github_releases;
mod glacier;
mod major_change;
mod mentions;
mod milestone_prs;
mod no_merges;
mod nominate;
mod note;
mod notification;
mod notify_zulip;
mod ping;
mod prioritize;
mod relabel;
mod review_requested;
mod review_submitted;
mod rfc_helper;
pub mod rustc_commits;
mod shortcut;
pub mod types_planning_updates;
pub async fn handle(ctx: &Context, event: &Event) -> Vec<HandlerError> {
let config = config::get(&ctx.github, event.repo()).await;
if let Err(e) = &config {
log::warn!("configuration error {}: {e}", event.repo().full_name);
}
let mut errors = Vec::new();
if let (Ok(config), Event::Issue(event)) = (config.as_ref(), event) {
handle_issue(ctx, event, config, &mut errors).await;
}
if let Some(body) = event.comment_body() {
handle_command(ctx, event, &config, body, &mut errors).await;
}
if let Err(e) = notification::handle(ctx, event).await {
log::error!(
"failed to process event {:?} with notification handler: {:?}",
event,
e
);
}
if let Err(e) = rustc_commits::handle(ctx, event).await {
log::error!(
"failed to process event {:?} with rustc_commits handler: {:?}",
event,
e
);
}
if let Err(e) = milestone_prs::handle(ctx, event).await {
log::error!(
"failed to process event {:?} with milestone_prs handler: {:?}",
event,
e
);
}
if let Err(e) = rfc_helper::handle(ctx, event).await {
log::error!(
"failed to process event {:?} with rfc_helper handler: {:?}",
event,
e
);
}
if let Some(config) = config
.as_ref()
.ok()
.and_then(|c| c.review_submitted.as_ref())
{
if let Err(e) = review_submitted::handle(ctx, event, config).await {
log::error!(
"failed to process event {:?} with review_submitted handler: {:?}",
event,
e
)
}
}
if let Some(ghr_config) = config
.as_ref()
.ok()
.and_then(|c| c.github_releases.as_ref())
{
if let Err(e) = github_releases::handle(ctx, event, ghr_config).await {
log::error!(
"failed to process event {:?} with github_releases handler: {:?}",
event,
e
);
}
}
errors
}
macro_rules! issue_handlers {
($($name:ident,)*) => {
async fn handle_issue(
ctx: &Context,
event: &IssuesEvent,
config: &Arc<Config>,
errors: &mut Vec<HandlerError>,
) {
$(
match $name::parse_input(ctx, event, config.$name.as_ref()).await {
Err(err) => errors.push(HandlerError::Message(err)),
Ok(Some(input)) => {
if let Some(config) = &config.$name {
$name::handle_input(ctx, config, event, input).await.unwrap_or_else(|err| errors.push(HandlerError::Other(err)));
} else {
errors.push(HandlerError::Message(format!(
"The feature `{}` is not enabled in this repository.\n\
To enable it add its section in the `triagebot.toml` \
in the root of the repository.",
stringify!($name)
)));
}
}
Ok(None) => {}
})*
}
}
}
// Handle events that happened on issues
//
// This is for events that happen only on issues (e.g. label changes).
// Each module in the list must contain the functions `parse_input` and `handle_input`.
issue_handlers! {
assign,
autolabel,
major_change,
mentions,
no_merges,
notify_zulip,
review_requested,
}
macro_rules! command_handlers {
($($name:ident: $enum:ident,)*) => {
async fn handle_command(
ctx: &Context,
event: &Event,
config: &Result<Arc<Config>, ConfigurationError>,
body: &str,
errors: &mut Vec<HandlerError>,
) {
match event {
Event::Issue(e) => if !matches!(e.action, IssuesAction::Opened | IssuesAction::Edited) {
// no change in issue's body for these events, so skip
log::debug!("skipping event, issue was {:?}", e.action);
return;
}
Event::IssueComment(e) => if e.action == IssueCommentAction::Deleted {
// don't execute commands again when comment is deleted
log::debug!("skipping event, comment was {:?}", e.action);
return;
}
Event::Push(_) | Event::Create(_) => {
log::debug!("skipping unsupported event");
return;
}
}
let input = Input::new(&body, vec![&ctx.username, "triagebot"]);
let commands = if let Some(previous) = event.comment_from() {
let prev_commands = Input::new(&previous, vec![&ctx.username, "triagebot"]).collect::<Vec<_>>();
input.filter(|cmd| !prev_commands.contains(cmd)).collect::<Vec<_>>()
} else {
input.collect()
};
log::info!("Comment parsed to {:?}", commands);
if commands.is_empty() {
return;
}
let config = match config {
Ok(config) => config,
Err(e @ ConfigurationError::Missing) => {
// r? is conventionally used to mean "hey, can you review"
// even if the repo doesn't have a triagebot.toml. In that
// case, just ignore it.
if commands
.iter()
.all(|cmd| matches!(cmd, Command::Assign(Ok(AssignCommand::ReviewName { .. }))))
{
return;
}
return errors.push(HandlerError::Message(e.to_string()));
}
Err(e @ ConfigurationError::Toml(_)) => {
return errors.push(HandlerError::Message(e.to_string()));
}
Err(e @ ConfigurationError::Http(_)) => {
return errors.push(HandlerError::Other(e.clone().into()));
}
};
for command in commands {
match command {
$(
Command::$enum(Ok(command)) => {
if let Some(config) = &config.$name {
$name::handle_command(ctx, config, event, command)
.await
.unwrap_or_else(|err| errors.push(HandlerError::Other(err)));
} else {
errors.push(HandlerError::Message(format!(
"The feature `{}` is not enabled in this repository.\n\
To enable it add its section in the `triagebot.toml` \
in the root of the repository.",
stringify!($name)
)));
}
}
Command::$enum(Err(err)) => {
errors.push(HandlerError::Message(format!(
"Parsing {} command in [comment]({}) failed: {}",
stringify!($name),
event.html_url().expect("has html url"),
err
)));
})*
}
}
}
}
}
// Handle commands in comments/issues body
//
// This is for handlers for commands parsed by the `parser` crate.
// Each variant of `parser::command::Command` must be in this list,
// preceded by the module containing the coresponding `handle_command` function
command_handlers! {
assign: Assign,
glacier: Glacier,
nominate: Nominate,
ping: Ping,
prioritize: Prioritize,
relabel: Relabel,
major_change: Second,
shortcut: Shortcut,
close: Close,
note: Note,
}
pub struct Context {
pub github: GithubClient,
pub db: crate::db::ClientPool,
pub username: String,
pub octocrab: Octocrab,
}