pub fn merge(store: Store, snapshots: &[Snapshot]) -> BoxFuture<Snapshot, String> {
    // We dedupe PathStats by their symbolic names, as those will be their names within the
    // `Directory` structure. Only `Dir+Dir` collisions are legal.
    let path_stats = {
      let mut uniq_paths: OrderMap<PathBuf, PathStat> = OrderMap::new();
      for path_stat in snapshots
        .iter()
        .map(|s| s.path_stats.iter().cloned())
        .flatten()
      {
        match uniq_paths.entry(path_stat.path().to_owned()) {
          ordermap::Entry::Occupied(e) => match (&path_stat, e.get()) {
            (&PathStat::Dir { .. }, &PathStat::Dir { .. }) => (),
            (x, y) => {
              return future::err(format!(
                "Snapshots contained duplicate path: {:?} vs {:?}",
                x, y
              )).to_boxed()
            }
          },
          ordermap::Entry::Vacant(v) => {
            v.insert(path_stat);
          }
        }
      }
      uniq_paths.into_iter().map(|(_, v)| v).collect()
    };
    // Recursively merge the Digests in the Snapshots.
    Self::merge_helper(store, snapshots.iter().map(|s| s.digest).collect())
      .map(move |root_digest| Snapshot {
        digest: root_digest,
        path_stats: path_stats,
      })
      .to_boxed()
  }
///
/// Given N Snapshots, returns a new Snapshot that merges them.
///
/// Any files that exist in multiple Snapshots will cause this method to fail: the assumption
/// behind this behaviour is that almost any colliding file would represent a Rule implementation
/// error, and in cases where overwriting a file is desirable, explicitly removing a duplicated
/// copy should be straightforward.
///
Given N Snapshots, returns a new Snapshot that merges them.
Any files that exist in multiple Snapshots will cause this method to fail: the assumption
behind this behaviour is that almost any colliding file would represent a Rule implementation
error, and in cases where overwriting a file is desirable, explicitly removing a duplicated
copy should be straightforward.
Given N Snapshots returns a new Snapshot that merges them . Any files that exist in multiple Snapshots will cause this method to fail : the assumption behind this behaviour is that almost any colliding file would represent a Rule implementation error and in cases where overwriting a file is desirable explicitly removing a duplicated copy should be straightforward .
pub fn merge(store: Store, snapshots: &[Snapshot]) -> BoxFuture<Snapshot, String> {
    // We dedupe PathStats by their symbolic names, as those will be their names within the
    // `Directory` structure. Only `Dir+Dir` collisions are legal.
    let path_stats = {
      let mut uniq_paths: OrderMap<PathBuf, PathStat> = OrderMap::new();
      for path_stat in snapshots
        .iter()
        .map(|s| s.path_stats.iter().cloned())
        .flatten()
      {
        match uniq_paths.entry(path_stat.path().to_owned()) {
          ordermap::Entry::Occupied(e) => match (&path_stat, e.get()) {
            (&PathStat::Dir { .. }, &PathStat::Dir { .. }) => (),
            (x, y) => {
              return future::err(format!(
                "Snapshots contained duplicate path: {:?} vs {:?}",
                x, y
              )).to_boxed()
            }
          },
          ordermap::Entry::Vacant(v) => {
            v.insert(path_stat);
          }
        }
      }
      uniq_paths.into_iter().map(|(_, v)| v).collect()
    };
    // Recursively merge the Digests in the Snapshots.
    Self::merge_helper(store, snapshots.iter().map(|s| s.digest).collect())
      .map(move |root_digest| Snapshot {
        digest: root_digest,
        path_stats: path_stats,
      })
      .to_boxed()
  }
pub fn merge ( store : Store , snapshots : & [ Snapshot ] ) -> BoxFuture < Snapshot , String > { // We dedupe PathStats by their symbolic names, as those will be their names within the // `Directory` structure. Only `Dir+Dir` collisions are legal. let path_stats = { let mut uniq_paths : OrderMap < PathBuf , PathStat > = OrderMap :: new ( ) ; for path_stat in snapshots . iter ( ) . map ( | s | s . path_stats . iter ( ) . cloned ( ) ) . flatten ( ) { match uniq_paths . entry ( path_stat . path ( ) . to_owned ( ) ) { ordermap :: Entry :: Occupied ( e ) => match ( & path_stat , e . get ( ) ) { ( & PathStat :: Dir { .. } , & PathStat :: Dir { .. } ) => ( ) , ( x , y ) => { return future :: err ( format ! ( " " x y ) ) . to_boxed ( ) } } , ordermap :: Entry :: Vacant ( v ) => { v . insert ( path_stat ) ; } } } uniq_paths . into_iter ( ) . map ( | ( _ , v ) | v ) . collect ( ) } ; // Recursively merge the Digests in the Snapshots. Self :: merge_helper ( store , snapshots . iter ( ) . map ( | s | s . digest ) . collect ( ) ) . map ( move | root_digest | Snapshot { digest : root_digest , path_stats : path_stats , } ) . to_boxed ( ) }
Given N Snapshots, returns a new Snapshot that merges them.
Given N Snapshots returns a new Snapshot that merges them .
store
Store
snapshots
&[Snapshot]
store
Store
snapshots
&[Snapshot]