Add Description field to lib list output (#845)

* Add Description field to lib list output

* [skip changelog] Fix lib list output

Output columns are now smaller, sentence is cut if too long and renamed
Sentence column to Description.

* [skip changelog] Fixed lib list output on Windows

Author: silvanocerza

cli/lib/list.go

@@ -90,7 +90,10 @@ func (ir installedResult) String() string {
 	}
 
 	t := table.New()
-	t.SetHeader("Name", "Installed", "Available", "Location")
+	t.SetHeader("Name", "Installed", "Available", "Location", "Description")
+	t.SetColumnWidthMode(1, table.Average)
+	t.SetColumnWidthMode(2, table.Average)
+	t.SetColumnWidthMode(4, table.Average)
 
 	lastName := ""
 	for _, libMeta := range ir.installedLibs {
@@ -109,11 +112,17 @@ func (ir installedResult) String() string {
 
 		if libMeta.GetRelease() != nil {
 			available := libMeta.GetRelease().GetVersion()
-			if available != "" {
-				t.AddRow(name, lib.Version, available, location)
-			} else {
-				t.AddRow(name, lib.Version, "-", location)
+			if available == "" {
+				available = "-"
 			}
+			sentence := lib.Sentence
+			if sentence == "" {
+				sentence = "-"
+			} else if len(sentence) > 40 {
+				sentence = sentence[:37] + "..."
+			}
+
+			t.AddRow(name, lib.Version, available, location, sentence)
 		}
 	}
 

test/test_lib.py

@@ -39,10 +39,14 @@ def test_list(run_command):
     assert "" == result.stderr
     lines = result.stdout.strip().splitlines()
     assert 2 == len(lines)
-    toks = [t.strip() for t in lines[1].split()]
+    toks = [t.strip() for t in lines[1].split(maxsplit=4)]
+    # Verifies the expected number of field
+    assert 5 == len(toks)
     # be sure line contain the current version AND the available version
     assert "" != toks[1]
     assert "" != toks[2]
+    # Verifies library sentence
+    assert "An efficient and elegant JSON library..." == toks[4]
 
     # Look at the JSON output
     result = run_command("lib list --format json")