lib search returns exact match as the first result. (arduino#1975)

* Removed global variable

* Small cosmetic fix

* lib: Sort search results and put exact match at the top

cli/lib/search.go

@@ -34,24 +34,23 @@ import (
 	semver "go.bug.st/relaxed-semver"
 )
 
-var (
-	namesOnly bool // if true outputs lib names only.
-)
-
 func initSearchCommand() *cobra.Command {
+	var namesOnly bool // if true outputs lib names only.
 	searchCommand := &cobra.Command{
 		Use:     fmt.Sprintf("search [%s]", tr("LIBRARY_NAME")),
 		Short:   tr("Searches for one or more libraries data."),
 		Long:    tr("Search for one or more libraries data (case insensitive search)."),
 		Example: "  " + os.Args[0] + " lib search audio",
 		Args:    cobra.ArbitraryArgs,
-		Run:     runSearchCommand,
+		Run: func(cmd *cobra.Command, args []string) {
+			runSearchCommand(args, namesOnly)
+		},
 	}
 	searchCommand.Flags().BoolVar(&namesOnly, "names", false, tr("Show library names only."))
 	return searchCommand
 }
 
-func runSearchCommand(cmd *cobra.Command, args []string) {
+func runSearchCommand(args []string, namesOnly bool) {
 	inst, status := instance.Create()
 	logrus.Info("Executing `arduino-cli lib search`")
 
@@ -73,7 +72,7 @@ func runSearchCommand(cmd *cobra.Command, args []string) {
 
 	searchResp, err := lib.LibrarySearch(context.Background(), &rpc.LibrarySearchRequest{
 		Instance: inst,
-		Query:    (strings.Join(args, " ")),
+		Query:    strings.Join(args, " "),
 	})
 	if err != nil {
 		feedback.Errorf(tr("Error searching for Libraries: %v"), err)
@@ -125,11 +124,6 @@ func (res result) String() string {
 		return tr("No libraries matching your search.")
 	}
 
-	// get a sorted slice of results
-	sort.Slice(results, func(i, j int) bool {
-		return results[i].Name < results[j].Name
-	})
-
 	var out strings.Builder
 
 	if res.results.GetStatus() == rpc.LibrarySearchStatus_LIBRARY_SEARCH_STATUS_FAILED {

commands/lib/search.go

@@ -17,6 +17,8 @@ package lib
 
 import (
 	"context"
+	"sort"
+	"strings"
 
 	"github.com/arduino/arduino-cli/arduino"
 	"github.com/arduino/arduino-cli/arduino/libraries/librariesindex"
@@ -38,7 +40,8 @@ func LibrarySearch(ctx context.Context, req *rpc.LibrarySearchRequest) (*rpc.Lib
 
 func searchLibrary(req *rpc.LibrarySearchRequest, lm *librariesmanager.LibrariesManager) *rpc.LibrarySearchResponse {
 	res := []*rpc.SearchedLibrary{}
-	queryTerms := utils.SearchTermsFromQueryString(req.GetQuery())
+	query := req.GetQuery()
+	queryTerms := utils.SearchTermsFromQueryString(query)
 
 	for _, lib := range lm.Index.Libraries {
 		toTest := lib.Name + " " +
@@ -54,6 +57,19 @@ func searchLibrary(req *rpc.LibrarySearchRequest, lm *librariesmanager.Libraries
 		}
 	}
 
+	// get a sorted slice of results
+	sort.Slice(res, func(i, j int) bool {
+		// Sort by name, but bubble up exact matches
+		equalsI := strings.EqualFold(res[i].Name, query)
+		equalsJ := strings.EqualFold(res[j].Name, query)
+		if equalsI && !equalsJ {
+			return true
+		} else if !equalsI && equalsJ {
+			return false
+		}
+		return res[i].Name < res[j].Name
+	})
+
 	return &rpc.LibrarySearchResponse{Libraries: res, Status: rpc.LibrarySearchStatus_LIBRARY_SEARCH_STATUS_SUCCESS}
 }
 

commands/lib/search_test.go

@@ -1,7 +1,6 @@
 package lib
 
 import (
-	"sort"
 	"strings"
 	"testing"
 
@@ -52,7 +51,6 @@ func TestSearchLibraryFields(t *testing.T) {
 		for _, lib := range searchLibrary(&rpc.LibrarySearchRequest{Query: q}, lm).Libraries {
 			libs = append(libs, lib.Name)
 		}
-		sort.Strings(libs)
 		return libs
 	}
 
@@ -76,4 +74,8 @@ func TestSearchLibraryFields(t *testing.T) {
 	require.Len(t, res, 2)
 	require.Equal(t, "Arduino_ConnectionHandler", res[0])
 	require.Equal(t, "FlashStorage_SAMD", res[1])
+
+	res = query("flashstorage")
+	require.Len(t, res, 19)
+	require.Equal(t, "FlashStorage", res[0])
 }