refactor tag command

crates/rustic_core/examples/tag.rs

@@ -0,0 +1,33 @@
+//! `tag` example
+use std::str::FromStr;
+
+use rustic_core::{Repository, RepositoryOptions, StringList};
+use simplelog::{Config, LevelFilter, SimpleLogger};
+
+fn main() {
+    // Display info logs
+    let _ = SimpleLogger::init(LevelFilter::Info, Config::default());
+
+    // Open repository
+    let repo_opts = RepositoryOptions {
+        repository: Some("/tmp/repo".to_string()),
+        password: Some("test".to_string()),
+        ..Default::default()
+    };
+    let repo = Repository::new(&repo_opts).unwrap().open().unwrap();
+
+    // Get all snapshots - use a filter which doesn't filter out.
+    let snaps = repo.get_matching_snapshots(|_| true).unwrap();
+
+    // Set tag "test" to all snapshots, filtering out unchanged (i.e. tag was aready preset) snapshots
+    let tags = vec![StringList::from_str("test").unwrap()];
+    let snaps: Vec<_> = snaps
+        .into_iter()
+        .filter_map(|mut sn| sn.add_tags(tags.clone()).then_some(sn)) // can also use set_tags or remove_tags
+        .collect();
+    let old_snap_ids: Vec<_> = snaps.iter().map(|sn| sn.id).collect();
+
+    // remove old snapshots and save changed ones
+    repo.save_snapshots(snaps).unwrap();
+    repo.delete_snapshots(&old_snap_ids).unwrap();
+}

crates/rustic_core/src/lib.rs

@@ -147,7 +147,6 @@ pub use crate::{
             DeleteOption, PathList, SnapshotFile, SnapshotGroup, SnapshotGroupCriterion,
             SnapshotOptions, StringList,
         },
-        RepoFile,
     },
     repository::{read_password_from_reader, Open, OpenStatus, Repository, RepositoryOptions},
 };

crates/rustic_core/src/repository.rs

@@ -490,6 +490,14 @@ impl<P: ProgressBars, S: Open> Repository<P, S> {
         SnapshotFile::from_ids(self.dbe(), ids, &p)
     }
 
+    pub fn get_matching_snapshots(
+        &self,
+        filter: impl FnMut(&SnapshotFile) -> bool,
+    ) -> RusticResult<Vec<SnapshotFile>> {
+        let p = self.pb.progress_counter("getting snapshots...");
+        SnapshotFile::all_from_backend(self.dbe(), filter, &p)
+    }
+
     pub fn get_forget_snapshots(
         &self,
         keep: &KeepOptions,
@@ -506,6 +514,15 @@ impl<P: ProgressBars, S: Open> Repository<P, S> {
         Ok(())
     }
 
+    pub fn save_snapshots(&self, mut snaps: Vec<SnapshotFile>) -> RusticResult<()> {
+        for snap in &mut snaps {
+            snap.id = Id::default();
+        }
+        let p = self.pb.progress_counter("saving snapshots...");
+        self.dbe().save_list(snaps.iter(), p)?;
+        Ok(())
+    }
+
     pub fn check(&self, opts: CheckOpts) -> RusticResult<()> {
         opts.run(self)
     }

src/commands/tag.rs

@@ -8,9 +8,7 @@ use abscissa_core::{Command, Runnable, Shutdown};
 
 use chrono::{Duration, Local};
 
-use rustic_core::{
-    DecryptWriteBackend, DeleteOption, FileType, Id, Open, ProgressBars, SnapshotFile, StringList,
-};
+use rustic_core::{DeleteOption, StringList};
 
 /// `tag` subcommand
 
@@ -78,13 +76,10 @@ impl TagCmd {
         let config = RUSTIC_APP.config();
         let repo = open_repository(&config)?;
 
-        let be = repo.dbe();
-
-        let p = config.global.progress_options.progress_hidden();
         let snapshots = if self.ids.is_empty() {
-            SnapshotFile::all_from_backend(be, |sn| config.snapshot_filter.matches(sn), &p)?
+            repo.get_matching_snapshots(|sn| config.snapshot_filter.matches(sn))?
         } else {
-            SnapshotFile::from_ids(be, &self.ids, &p)?
+            repo.get_snapshots(&self.ids)?
         };
 
         let delete = match (
@@ -98,19 +93,13 @@ impl TagCmd {
             (false, false, None) => None,
         };
 
-        let mut snapshots: Vec<_> = snapshots
+        let snapshots: Vec<_> = snapshots
             .into_iter()
             .filter_map(|mut sn| {
                 sn.modify_sn(self.set.clone(), self.add.clone(), &self.remove, &delete)
             })
             .collect();
         let old_snap_ids: Vec<_> = snapshots.iter().map(|sn| sn.id).collect();
-        // remove old ids from snapshots
-        for snap in &mut snapshots {
-            snap.id = Id::default();
-        }
-
-        let progress_options = &config.global.progress_options;
 
         match (old_snap_ids.is_empty(), config.global.dry_run) {
             (true, _) => println!("no snapshot changed."),
@@ -118,11 +107,8 @@ impl TagCmd {
                 println!("would have modified the following snapshots:\n {old_snap_ids:?}");
             }
             (false, false) => {
-                let p = progress_options.progress_counter("saving new snapshots...");
-                be.save_list(snapshots.iter(), p)?;
-
-                let p = progress_options.progress_counter("deleting old snapshots...");
-                be.delete_list(FileType::Snapshot, true, old_snap_ids.iter(), p)?;
+                repo.save_snapshots(snapshots)?;
+                repo.delete_snapshots(&old_snap_ids)?;
             }
         }