feat: start reimplementing package removals; some fixes

server/src/cli.rs

@@ -44,7 +44,7 @@ pub struct Cli {
     #[arg(
         long,
         value_name = "LOG_LEVEL",
-        default_value = "tower_http=debug,rieterd=debug",
+        default_value = "tower_http=debug,rieterd=debug,sea_orm=debug",
         env = "RIETER_LOG"
     )]
     pub log: String,

server/src/db/query/package.rs

@@ -2,7 +2,7 @@ use crate::db::{self, *};
 
 use futures::Stream;
 use sea_orm::{sea_query::IntoCondition, *};
-use sea_query::{Alias, Expr, Query};
+use sea_query::{Alias, Asterisk, Expr, Query, SelectStatement};
 use serde::Deserialize;
 
 #[derive(Deserialize)]
@@ -218,11 +218,85 @@ pub async fn full(conn: &DbConn, id: i32) -> Result<Option<FullPackage>> {
 
 #[derive(FromQueryResult)]
 pub struct PkgToRemove {
-    repo_id: i32,
-    id: i32,
+    pub repo_id: i32,
+    pub id: i32,
 }
 
-pub fn to_be_removed_query(conn: &DbConn) -> SelectorRaw<SelectModel<PkgToRemove>> {
+fn max_pkg_ids_query() -> SelectStatement {
+    Query::select()
+        .from(db::package::Entity)
+        .columns([
+            db::package::Column::RepoId,
+            db::package::Column::Arch,
+            db::package::Column::Name,
+        ])
+        .expr_as(db::package::Column::Id.max(), Alias::new("max_id"))
+        .group_by_columns([
+            db::package::Column::RepoId,
+            db::package::Column::Arch,
+            db::package::Column::Name,
+        ])
+        .cond_where(
+            Condition::all().add(db::package::Column::State.eq(db::PackageState::Committed)),
+        )
+        .to_owned()
+}
+
+pub fn pkgs_to_sync(
+    conn: &DbConn,
+    repo: i32,
+    arch: &str,
+) -> SelectorRaw<SelectModel<package::Model>> {
+    let max_id_query = Query::select()
+        .columns([
+            db::package::Column::RepoId,
+            db::package::Column::Arch,
+            db::package::Column::Name,
+        ])
+        .expr_as(db::package::Column::Id.max(), Alias::new("max_id"))
+        .from(db::package::Entity)
+        .group_by_columns([
+            db::package::Column::RepoId,
+            db::package::Column::Arch,
+            db::package::Column::Name,
+        ])
+        .to_owned();
+
+    let (p1, p2) = (Alias::new("p1"), Alias::new("p2"));
+    let query = Query::select()
+        .column((p1.clone(), Asterisk))
+        .from_as(db::package::Entity, p1.clone())
+        .join_subquery(
+            JoinType::InnerJoin,
+            max_id_query,
+            p2.clone(),
+            Expr::col((p1.clone(), db::package::Column::Id))
+                .eq(Expr::col((p2.clone(), Alias::new("max_id")))),
+        )
+        .cond_where(
+            Condition::all()
+                .add(Expr::col((p1.clone(), db::package::Column::RepoId)).eq(repo))
+                .add(
+                    Expr::col((p1.clone(), db::package::Column::State))
+                        .ne(db::PackageState::PendingDeletion),
+                )
+                .add(
+                    Expr::col((p1.clone(), db::package::Column::Arch))
+                        .is_in([arch, crate::ANY_ARCH]),
+                ),
+        )
+        .to_owned();
+    let builder = conn.get_database_backend();
+    let sql = builder.build(&query);
+
+    db::Package::find().from_raw_sql(sql)
+}
+
+fn stale_pkgs_query(include_repo: bool) -> SelectStatement {
+    // In each repository, only one version of a package can exist for any given arch. Because ids
+    // are monotonically increasing, we know that the row that represents the actual package
+    // currently in the repository is the row with the largest id whose state is "committed". This
+    // query finds this id for each (repo, arch, name) tuple.
     let mut max_id_query = Query::select();
     max_id_query
         .from(db::package::Entity)
@@ -243,12 +317,23 @@ pub fn to_be_removed_query(conn: &DbConn) -> SelectorRaw<SelectModel<PkgToRemove
 
     let (p1, p2) = (Alias::new("p1"), Alias::new("p2"));
     let mut query = Query::select();
-    query
-        .from_as(db::package::Entity, p1.clone())
-        .columns([
+
+    // We then perform an inner join between the max id query above and the package table, where we
+    // filter on rows whose id is less than their respective package's max id or whose state is set
+    // to "pending deletion". This gives us all rows in the database that correspond to packages
+    // that are no longer needed, and can thus be removed.
+    query.from_as(db::package::Entity, p1.clone());
+
+    if include_repo {
+        query.columns([
             (p1.clone(), db::package::Column::RepoId),
             (p1.clone(), db::package::Column::Id),
-        ])
+        ]);
+    } else {
+        query.column((p1.clone(), db::package::Column::Id));
+    }
+
+    query
         .join_subquery(
             JoinType::InnerJoin,
             max_id_query,
@@ -277,9 +362,23 @@ pub fn to_be_removed_query(conn: &DbConn) -> SelectorRaw<SelectModel<PkgToRemove
                     Expr::col((p1.clone(), db::package::Column::Id))
                         .eq(db::PackageState::PendingDeletion),
                 ),
-        );
+        )
+        .to_owned()
+}
+
+pub fn stale_pkgs(conn: &DbConn) -> SelectorRaw<SelectModel<PkgToRemove>> {
+    let query = stale_pkgs_query(true);
     let builder = conn.get_database_backend();
     let sql = builder.build(&query);
 
     PkgToRemove::find_by_statement(sql)
 }
+
+pub async fn delete_stale_pkgs(conn: &DbConn, max_id: i32) -> crate::Result<()> {
+    Ok(db::Package::delete_many()
+        .filter(db::package::Column::Id.lte(max_id))
+        .filter(db::package::Column::Id.in_subquery(stale_pkgs_query(false)))
+        .exec(conn)
+        .await
+        .map(|_| ())?)
+}

server/src/main.rs

@@ -12,6 +12,8 @@ use repo::DistroMgr;
 use clap::Parser;
 use std::{path::PathBuf, sync::Arc};
 
+pub const ANY_ARCH: &'static str = "any";
+
 #[derive(Clone)]
 pub struct Config {
     data_dir: PathBuf,

server/src/repo/manager2.rs

@@ -1,5 +1,5 @@
 use super::{archive, package};
-use crate::db;
+use crate::db::{self, query::package::delete_stale_pkgs};
 
 use std::{
     collections::HashMap,
@@ -22,8 +22,6 @@ use tokio::sync::{
 };
 use uuid::Uuid;
 
-pub const ANY_ARCH: &'static str = "any";
-
 struct PkgQueueMsg {
     repo: i32,
     path: PathBuf,
@@ -103,16 +101,37 @@ impl RepoMgr {
     }
 
     /// Clean any remaining old package files from the database and file system
-    pub async fn clean(&self) -> crate::Result<()> {
-        let mut pkgs = db::query::package::to_be_removed_query(&self.conn)
+    pub async fn remove_stale_pkgs(&self) -> crate::Result<()> {
+        let mut pkgs = db::query::package::stale_pkgs(&self.conn)
             .stream(&self.conn)
             .await?;
 
+        // Ids are monotonically increasing, so the max id suffices to know which packages to
+        // remove later
+        let mut max_id = -1;
+        let mut removed_pkgs = 0;
+
         while let Some(pkg) = pkgs.next().await.transpose()? {
-            // TODO remove package from file system and database
+            // Failing to remove the package file isn't the biggest problem
+            let _ = tokio::fs::remove_file(
+                self.repos_dir
+                    .join(pkg.repo_id.to_string())
+                    .join(pkg.id.to_string()),
+            )
+            .await;
+
+            if pkg.id > max_id {
+                max_id = pkg.id;
+            }
+
+            removed_pkgs += 1;
         }
 
-        // TODO log indicating how many packages were cleaned
+        if removed_pkgs > 0 {
+            db::query::package::delete_stale_pkgs(&self.conn, max_id).await?;
+        }
+
+        tracing::info!("Removed {removed_pkgs} stale package(s)");
 
         Ok(())
     }
@@ -126,18 +145,7 @@ impl RepoMgr {
 
         // Query all packages in the repo that have the given architecture or the "any"
         // architecture
-        let mut pkgs = db::Package::find()
-            .filter(db::package::Column::RepoId.eq(repo))
-            .filter(db::package::Column::Arch.is_in([arch, ANY_ARCH]))
-            .filter(
-                db::package::Column::Id.in_subquery(
-                    Query::select()
-                        .expr(db::package::Column::Id.max())
-                        .from(db::package::Entity)
-                        .group_by_columns([db::package::Column::Arch, db::package::Column::Name])
-                        .to_owned(),
-                ),
-            )
+        let mut pkgs = db::query::package::pkgs_to_sync(&self.conn, repo, arch)
             .stream(&self.conn)
             .await?;
 
@@ -233,7 +241,7 @@ impl RepoMgr {
 
                     // TODO move this so that we only clean if entire queue is empty, not just
                     // queue for specific repo
-                    let _ = self.clean().await;
+                    let _ = self.remove_stale_pkgs().await;
                 }
             }
         }
@@ -246,6 +254,19 @@ impl RepoMgr {
         });
     }
 
+    pub async fn get_repo(&self, distro: &str, repo: &str) -> crate::Result<Option<i32>> {
+        Ok(db::Repo::find()
+            .find_also_related(db::Distro)
+            .filter(
+                Condition::all()
+                    .add(db::repo::Column::Name.eq(repo))
+                    .add(db::distro::Column::Name.eq(distro)),
+            )
+            .one(&self.conn)
+            .await
+            .map(|res| res.map(|(repo, _)| repo.id))?)
+    }
+
     pub async fn get_or_create_repo(&self, distro: &str, repo: &str) -> crate::Result<i32> {
         let mut repos = self.repos.write().await;
 
@@ -323,6 +344,37 @@ impl RepoMgr {
         Ok(())
     }
 
+    pub async fn remove_repo(&self, repo: i32) -> crate::Result<()> {
+        self.repos.write().await.remove(&repo);
+        db::Repo::delete_by_id(repo).exec(&self.conn).await?;
+        let _ = tokio::fs::remove_dir_all(self.repos_dir.join(repo.to_string())).await;
+
+        Ok(())
+    }
+
+    /// Remove all packages in the repository that have a given arch. This method marks all
+    /// packages with the given architecture as "pending deletion", before performing a manual sync
+    /// & removal of stale packages.
+    pub async fn remove_repo_arch(&self, repo: i32, arch: &str) -> crate::Result<()> {
+        db::Package::update_many()
+            .col_expr(
+                db::package::Column::State,
+                Expr::value(db::PackageState::PendingDeletion),
+            )
+            .filter(
+                Condition::all()
+                    .add(db::package::Column::RepoId.eq(repo))
+                    .add(db::package::Column::Arch.eq(arch)),
+            )
+            .exec(&self.conn)
+            .await?;
+
+        self.sync_repo(repo).await?;
+        self.remove_stale_pkgs().await?;
+
+        Ok(())
+    }
+
     pub fn random_file_paths<const C: usize>(&self) -> [PathBuf; C] {
         std::array::from_fn(|_| {
             let uuid: uuid::fmt::Simple = Uuid::new_v4().into();

server/src/repo/mod.rs

@@ -49,25 +49,29 @@ async fn get_file(
     Path((distro, repo, arch, file_name)): Path<(String, String, String, String)>,
     req: Request<Body>,
 ) -> crate::Result<impl IntoResponse> {
-    let repo_dir = global
-        .config
-        .data_dir
-        .join("distros")
-        .join(&distro)
-        .join(&repo);
+    if let Some(repo_id) = global.mgr.get_repo(&distro, &repo).await? {
+        let repo_dir = global
+            .config
+            .data_dir
+            .join("repos")
+            .join(repo_id.to_string());
 
-    let file_name =
-        if file_name == format!("{}.db", repo) || file_name == format!("{}.db.tar.gz", repo) {
-            format!("{}.db.tar.gz", arch)
-        } else if file_name == format!("{}.files", repo)
-            || file_name == format!("{}.files.tar.gz", repo)
-        {
-            format!("{}.files.tar.gz", arch)
-        } else {
-            file_name
-        };
+        let file_name =
+            if file_name == format!("{}.db", repo) || file_name == format!("{}.db.tar.gz", repo) {
+                format!("{}.db.tar.gz", arch)
+            } else if file_name == format!("{}.files", repo)
+                || file_name == format!("{}.files.tar.gz", repo)
+            {
+                format!("{}.files.tar.gz", arch)
+            } else {
+                file_name
+            };
 
-    Ok(ServeFile::new(repo_dir.join(file_name)).oneshot(req).await)
+        let path = repo_dir.join(file_name);
+        Ok(ServeFile::new(path).oneshot(req).await)
+    } else {
+        Err(StatusCode::NOT_FOUND.into())
+    }
 }
 
 async fn post_package_archive(
@@ -84,18 +88,6 @@ async fn post_package_archive(
 
     global.mgr.queue_pkg(repo, tmp_path).await;
 
-    //let (name, version, arch) = mgr.add_pkg_from_path(&mut body, &repo).await?;
-    //
-    //tracing::info!(
-    //    "Added '{}-{}' to repository '{}' ({})",
-    //    name,
-    //    version,
-    //    repo,
-    //    arch
-    //);
-
-    //tokio::spawn(async move { mgr.sync_repo(&repo).await });
-
     Ok(())
 }
 
@@ -103,20 +95,15 @@ async fn delete_repo(
     State(global): State<crate::Global>,
     Path((distro, repo)): Path<(String, String)>,
 ) -> crate::Result<StatusCode> {
-    Ok(StatusCode::NOT_FOUND)
-    //if let Some(mgr) = global.mgr.get_mgr(&distro).await {
-    //    let repo_removed = mgr.remove_repo(&repo).await?;
-    //
-    //    if repo_removed {
-    //        tracing::info!("Removed repository '{}'", repo);
-    //
-    //        Ok(StatusCode::OK)
-    //    } else {
-    //        Ok(StatusCode::NOT_FOUND)
-    //    }
-    //} else {
-    //    Ok(StatusCode::NOT_FOUND)
-    //}
+    if let Some(repo) = global.mgr.get_repo(&distro, &repo).await? {
+        global.mgr.remove_repo(repo).await?;
+
+        tracing::info!("Removed repository {repo}");
+
+        Ok(StatusCode::OK)
+    } else {
+        Ok(StatusCode::NOT_FOUND)
+    }
 }
 
 async fn delete_arch_repo(