srcd parse: do not check the list of languages

CHANGELOG.md

@@ -32,6 +32,13 @@
 
 - The commands fail gracefully if an incompatible Docker installation is found, such as Docker Toolbox  ([#417](https://github.com/src-d/engine/issues/417)).
 
+### Known Issues
+
+- [#297](https://github.com/src-d/engine/issues/297): `srcd parse` does not detect the language automatically for bash files. For this language you will need to set `--lang` manually. For example:
+```
+$ srcd parse uast file.bash --lang bash
+```
+
 </details>
 
 ## [v0.12.0](https://github.com/src-d/engine/releases/tag/v0.12.0) - 2019-04-04

cmd/srcd/cmd/parse.go

@@ -78,8 +78,6 @@ func (cmd *parseUASTCmd) Execute(args []string) error {
 	}
 
 	lang := cmd.Lang
-	var resp *api.ListDriversResponse
-
 	if lang == "" {
 		lang, err = parseLang(ctx, c, cmd.Args.Path, b)
 		started()
@@ -89,21 +87,10 @@ func (cmd *parseUASTCmd) Execute(args []string) error {
 		}
 
 		log.Infof("detected language: %s", lang)
-		resp, err = c.ListDrivers(ctx, &api.ListDriversRequest{})
 	} else {
-		resp, err = c.ListDrivers(ctx, &api.ListDriversRequest{})
 		started()
 	}
 
-	if err != nil {
-		return humanizef(err, "could not list drivers")
-	}
-
-	err = checkSupportedLanguage(resp.Drivers, lang)
-	if err != nil {
-		return err
-	}
-
 	stream, err := c.ParseWithLogs(ctx, &api.ParseRequest{
 		Kind:    api.ParseRequest_UAST,
 		Name:    cmd.Args.Path,
@@ -123,6 +110,12 @@ func (cmd *parseUASTCmd) Execute(args []string) error {
 		}
 
 		if err != nil {
+			if strings.Contains(err.Error(), "missing driver for language") {
+				if err := checkSupportedLanguage(ctx, c, lang); err != nil {
+					return err
+				}
+			}
+
 			return humanizef(err, "could not stream")
 		}
 
@@ -211,10 +204,15 @@ func parseLang(ctx context.Context, client api.EngineClient, path string, b []by
 	return res.Lang, nil
 }
 
-func checkSupportedLanguage(supportedDrivers []*api.ListDriversResponse_DriverInfo, desired string) error {
+func checkSupportedLanguage(ctx context.Context, c api.EngineClient, desired string) error {
+	resp, errList := c.ListDrivers(ctx, &api.ListDriversRequest{})
+	if errList != nil {
+		return humanizef(errList, "could not list drivers")
+	}
+
 	var langs []string
 	isSupported := false
-	for _, driver := range supportedDrivers {
+	for _, driver := range resp.Drivers {
 		langs = append(langs, driver.Lang)
 		if driver.Lang == desired {
 			isSupported = true

cmdtests/parse_test.go

@@ -42,11 +42,14 @@ var testCases = []testCase{
 		filename: "hello-py3.py",
 		lang:     "python",
 	},
-	{
-		path:     filepath.FromSlash("testdata/hello.cpp"),
-		filename: "hello.cpp",
-		lang:     "c++",
-	},
+	// Disabled cpp parsing, see https://github.com/bblfsh/cpp-driver/issues/31
+	/*
+		{
+			path:     filepath.FromSlash("testdata/hello.cpp"),
+			filename: "hello.cpp",
+			lang:     "c++",
+		},
+	*/
 	{
 		path:     filepath.FromSlash("testdata/hello.java"),
 		filename: "hello.java",
@@ -72,11 +75,14 @@ var testCases = []testCase{
 		filename: "hello.go",
 		lang:     "go",
 	},
-	{
-		path:     filepath.FromSlash("testdata/hello.cs"),
-		filename: "hello.cs",
-		lang:     "c#",
-	},
+	// Disabled csharp parsing, see https://github.com/bblfsh/bblfshd/issues/259
+	/*
+		{
+			path:     filepath.FromSlash("testdata/hello.cs"),
+			filename: "hello.cs",
+			lang:     "c#",
+		},
+	*/
 	{
 		path:     filepath.FromSlash("testdata/hello.php"),
 		filename: "hello.php",
@@ -177,7 +183,7 @@ func (s *ParseTestSuite) TestUast() {
 				// ----------------
 				// TODO Temporary test skip, it fails for cpp, bash, and csharp.
 				// See https://github.com/src-d/engine/issues/297
-				if tc.lang == "c++" || tc.lang == "shell" || tc.lang == "c#" {
+				if tc.lang == "shell" {
 					// This Error assertion will fail when #297 is fixed, to remind us to remove this skip
 					require.Error(r.Error)
 					t.Skip("TEST FAILURE IS A KNOWN ISSUE (#297): " + r.Stdout())