first attempt at sorting output

This does currently not work yet, as we cannot call .finish() on dyn
Aggregator. This needs to be adjusted.

However, this provides the basic infrastructure for producing sorted
output, including the required command line parsing.

1 files changed, 8 insertions, 3 deletions

diff --git a/src/output/mod.rs b/src/output/mod.rs
index 0fd92d9..18ab84b 100644
--- a/src/output/mod.rs
+++ b/src/output/mod.rs
@@ -5,15 +5,20 @@ use std::io;
 pub mod aggregators;
 pub mod formats;
 pub mod pipeline;
+pub mod sorting;
 
 pub use self::pipeline::Pipeline;
 
-use self::formats::Format;
+use self::{formats::Format, aggregators::Aggregator};
 
 /// Build an pipeline for the given command line options.
 pub fn build_pipeline(opt: &Opt) -> Pipeline {
     let stream = io::stdout();
-    let aggregator = aggregators::WriteThrough;
+    let aggregator: Box<dyn Aggregator> = if let Some(sorting) = &opt.sorting {
+        Box::new(aggregators::SortedOutput::new(sorting.clone()))
+    } else {
+        Box::new(aggregators::WriteThrough)
+    };
 
     let format: Box<dyn Format> = if opt.file_name_only {
         Box::new(formats::FileOnly)
@@ -23,5 +28,5 @@ pub fn build_pipeline(opt: &Opt) -> Pipeline {
         })
     };
 
-    Pipeline::new(Box::new(stream), format, Box::new(aggregator))
+    Pipeline::new(Box::new(stream), format, aggregator)
 }