New formatting for the summary report

Resolves #243.

src/report/report.ml

@@ -583,6 +583,8 @@ let main () =
           search_in_path data points
     | `Csv, file ->
         generic_output file (Report_csv.make !Arguments.csv_separator)
+    | `Text, "-" ->
+      Report_text.output ~per_file:(not !Arguments.summary_only) data
     | `Text, file ->
         generic_output file (Report_text.make !Arguments.summary_only)
     | `Dump, file ->

src/report/report_text.ml

@@ -22,3 +22,72 @@ let make summary_only =
           "none" in
       Report_utils.(numbers s.visited s.total) ^ "\n"
   end
+
+
+
+let output ~per_file counts =
+  let stats =
+    Hashtbl.fold (fun file counts acc ->
+      let total = Array.length counts in
+      let visited =
+        Array.fold_left
+          (fun acc count -> if count > 0 then acc + 1 else acc) 0 counts
+      in
+      (file, visited, total)::acc) counts []
+  in
+
+  let percentage numerator denominator =
+    if denominator > 0 then
+      let p =
+        ((float_of_int numerator) *. 100.) /. (float_of_int denominator) in
+      Printf.sprintf "%.2f" p
+    else
+      "0.00"
+  in
+
+  let second (_, v, _) = v in
+  let third (_, _, v) = v in
+
+  let total projection =
+    stats
+    |> List.map projection
+    |> List.fold_left (+) 0
+  in
+  let visited_total = total second in
+  let overall_total = total third in
+
+  if per_file then begin
+    let digits i =
+      let rec loop bound count =
+        if bound > i then
+          count
+        else
+          loop (bound * 10) (count + 1)
+      in
+      loop 10 1
+    in
+    let digits projection =
+      ("", visited_total, overall_total)::stats
+      |> List.map projection
+      |> List.map digits
+      |> List.fold_left max 1
+    in
+    let visited_digits = digits second in
+    let total_digits = digits third in
+
+    stats
+    |> List.sort (fun (file, _, _) (file', _, _) -> String.compare file file')
+    |> List.iter begin fun (name, visited, total) ->
+      Printf.printf "%6s %%   %*i/%-*i   %s\n"
+        (percentage visited total)
+        visited_digits visited
+        total_digits total
+        name
+    end;
+
+    Printf.printf "%6s %%   %i/%i   Project coverage\n%!"
+      (percentage visited_total overall_total) visited_total overall_total
+  end
+  else
+    Printf.printf "Coverage: %i/%i (%s%%)\n%!"
+      visited_total overall_total (percentage visited_total overall_total)

src/report/report_text.mli

@@ -4,9 +4,9 @@
 
 
 
-(** This module defines the output to bare text. *)
-
-
 val make : bool -> Report_generic.converter
 (** Returns a converter for bare text output, the passed boolean indicates
     whether only summary should be output. *)
+
+val output : per_file:bool -> (string, int array) Hashtbl.t -> unit
+(** Writes a text summary report to STDOUT. *)

test/unit/fixtures/report/reference.text

@@ -1,2 +1,2 @@
-Coverage summary: 19/38 (50.00%)
-File 'source.ml': 19/38 (50.00%)
+ 50.00 %   19/38   source.ml
+ 50.00 %   19/38   Project coverage