added interpreters_map.go generation

fixed Interpreters comment

internal/code-generator/generator/generator_test.go

@@ -41,6 +41,12 @@ const (
 	typesGold         = "test_files/type.gold"
 	typesTestTmplPath = "test_files/type.test.go.tmpl"
 	typesTestTmplName = "type.test.go.tmpl"
+
+	// Interpreters test
+	interpretersTestFile     = "test_files/interpreters.test.yml"
+	interpretersGold         = "test_files/interpreters.gold"
+	interpretersTestTmplPath = "test_files/interpreters.test.go.tmpl"
+	interpretersTestTmplName = "interpreters.test.go.tmpl"
 )
 
 func TestFromFile(t *testing.T) {
@@ -59,6 +65,9 @@ func TestFromFile(t *testing.T) {
 	goldTypes, err := ioutil.ReadFile(typesGold)
 	assert.NoError(t, err)
 
+	goldInterpreters, err := ioutil.ReadFile(interpretersGold)
+	assert.NoError(t, err)
+
 	outPathLang, err := ioutil.TempFile("/tmp", "generator-test-")
 	assert.NoError(t, err)
 	defer os.Remove(outPathLang.Name())
@@ -79,6 +88,10 @@ func TestFromFile(t *testing.T) {
 	assert.NoError(t, err)
 	defer os.Remove(outPathTypes.Name())
 
+	outPathInterpreters, err := ioutil.TempFile("/tmp", "generator-test-")
+	assert.NoError(t, err)
+	defer os.Remove(outPathInterpreters.Name())
+
 	tests := []struct {
 		name        string
 		fileToParse string
@@ -139,6 +152,16 @@ func TestFromFile(t *testing.T) {
 			generate:    Types,
 			wantOut:     goldTypes,
 		},
+		{
+			name:        "TestFromFile_Interpreters",
+			fileToParse: interpretersTestFile,
+			outPath:     outPathInterpreters.Name(),
+			tmplPath:    interpretersTestTmplPath,
+			tmplName:    interpretersTestTmplName,
+			commit:      commitTest,
+			generate:    Interpreters,
+			wantOut:     goldInterpreters,
+		},
 	}
 
 	for _, tt := range tests {

internal/code-generator/generator/interpreters.go

@@ -0,0 +1,54 @@
+package generator
+
+import (
+	"bytes"
+	"io"
+	"strings"
+	"text/template"
+
+	"gopkg.in/yaml.v2"
+)
+
+// Interpreters reads from buf and builds interpreters_map.go file from interpretersTmplPath.
+func Interpreters(data []byte, interpretersTmplPath, interpretersTmplName, commit string) ([]byte, error) {
+	languages := make(map[string]*languageInfo)
+	if err := yaml.Unmarshal(data, &languages); err != nil {
+		return nil, err
+	}
+
+	orderedKeys := getAlphabeticalOrderedKeys(languages)
+	languagesByInterpreter := buildInterpreterLanguagesMap(languages, orderedKeys)
+
+	buf := &bytes.Buffer{}
+	if err := executeInterpretersTemplate(buf, languagesByInterpreter, interpretersTmplPath, interpretersTmplName, commit); err != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+func buildInterpreterLanguagesMap(languages map[string]*languageInfo, orderedKeys []string) map[string][]string {
+	interpreterLangsMap := make(map[string][]string)
+	for _, lang := range orderedKeys {
+		langInfo := languages[lang]
+		for _, interpreter := range langInfo.Interpreters {
+			interpreterLangsMap[interpreter] = append(interpreterLangsMap[interpreter], lang)
+		}
+	}
+
+	return interpreterLangsMap
+}
+
+func executeInterpretersTemplate(out io.Writer, languagesByInterpreter map[string][]string, interpretersTmplPath, interpretersTmpl, commit string) error {
+	fmap := template.FuncMap{
+		"getCommit":         func() string { return commit },
+		"formatStringSlice": func(slice []string) string { return `"` + strings.Join(slice, `","`) + `"` },
+	}
+
+	t := template.Must(template.New(interpretersTmpl).Funcs(fmap).ParseFiles(interpretersTmplPath))
+	if err := t.Execute(out, languagesByInterpreter); err != nil {
+		return err
+	}
+
+	return nil
+}

internal/code-generator/generator/test_files/interpreters.gold

@@ -0,0 +1,16 @@
+package slinguist
+
+// CODE GENERATED AUTOMATICALLY WITH github.com/src-d/simple-linguist/cli/slinguist-generate
+// THIS FILE SHOULD NOT BE EDITED BY HAND
+// Extracted from github/linguist commit: fe8b44ab8a225b1ffa75b983b916ea22fee5b6f7
+
+var languagesByInterpreter = map[string][]string{
+	"bash":    {"Shell"},
+	"nush":    {"Nu"},
+	"python":  {"Python"},
+	"python2": {"Python"},
+	"python3": {"Python"},
+	"rc":      {"Shell"},
+	"sh":      {"Shell"},
+	"zsh":     {"Shell"},
+}

internal/code-generator/generator/test_files/interpreters.test.go.tmpl

@@ -0,0 +1,11 @@
+package slinguist
+
+// CODE GENERATED AUTOMATICALLY WITH github.com/src-d/simple-linguist/cli/slinguist-generate
+// THIS FILE SHOULD NOT BE EDITED BY HAND
+// Extracted from github/linguist commit: {{ getCommit }}
+
+var languagesByInterpreter = map[string][]string{
+	{{range $interpreter, $languages := . -}}
+	"{{ $interpreter }}":	{ {{- $languages | formatStringSlice -}} },
+	{{end -}}
+}

internal/code-generator/generator/test_files/interpreters.test.yml

@@ -0,0 +1,15 @@
+---
+Nu:
+  interpreters:
+  - nush
+Shell:
+  interpreters:
+  - bash
+  - rc
+  - sh
+  - zsh
+Python:
+  interpreters:
+  - python
+  - python2
+  - python3