Add detected file language to code search (#10256)

Move langauge detection to separate module to be more reusable

Add option to disable vendored file exclusion from file search

Allways show all language stats for search

vendor/github.com/blevesearch/bleve/analysis/analyzer/keyword/keyword.go

@@ -0,0 +1,38 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package keyword
+
+import (
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/analysis/tokenizer/single"
+	"github.com/blevesearch/bleve/registry"
+)
+
+const Name = "keyword"
+
+func AnalyzerConstructor(config map[string]interface{}, cache *registry.Cache) (*analysis.Analyzer, error) {
+	keywordTokenizer, err := cache.TokenizerNamed(single.Name)
+	if err != nil {
+		return nil, err
+	}
+	rv := analysis.Analyzer{
+		Tokenizer: keywordTokenizer,
+	}
+	return &rv, nil
+}
+
+func init() {
+	registry.RegisterAnalyzer(Name, AnalyzerConstructor)
+}

vendor/github.com/blevesearch/bleve/analysis/tokenizer/single/single.go

@@ -0,0 +1,49 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package single
+
+import (
+	"github.com/blevesearch/bleve/analysis"
+	"github.com/blevesearch/bleve/registry"
+)
+
+const Name = "single"
+
+type SingleTokenTokenizer struct {
+}
+
+func NewSingleTokenTokenizer() *SingleTokenTokenizer {
+	return &SingleTokenTokenizer{}
+}
+
+func (t *SingleTokenTokenizer) Tokenize(input []byte) analysis.TokenStream {
+	return analysis.TokenStream{
+		&analysis.Token{
+			Term:     input,
+			Position: 1,
+			Start:    0,
+			End:      len(input),
+			Type:     analysis.AlphaNumeric,
+		},
+	}
+}
+
+func SingleTokenTokenizerConstructor(config map[string]interface{}, cache *registry.Cache) (analysis.Tokenizer, error) {
+	return NewSingleTokenTokenizer(), nil
+}
+
+func init() {
+	registry.RegisterTokenizer(Name, SingleTokenTokenizerConstructor)
+}