rocks: '--server' flag now accepts several URL's

Changed '--server' flag, so it now accepts several URL's.

Closes #686

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Make cartridge app dependencies less strict.
 - `tt connect` auto-completion shows directories and files when there are no
 running apps.
+- `tt rocks --server` now accepts several URL's.
 
 ### Added
 

cli/rocks/rocks.go

@@ -42,7 +42,19 @@ func addLuarocksRepoOpts(cliOpts *config.CliOpts, args []string) ([]string, erro
 
 	// Check whether rocks repository is specified in tt config.
 	if cliOpts.Repo != nil && cliOpts.Repo.Rocks != "" {
-		args = append(args, "--server", cliOpts.Repo.Rocks)
+		isServerSet := false
+		for i, opt := range args {
+			if opt == "--server" {
+				isServerSet = true
+				args[i+1] = args[i+1] + " " + cliOpts.Repo.Rocks
+			} else if strings.HasPrefix(opt, "--server=") {
+				isServerSet = true
+				args[i] += " " + cliOpts.Repo.Rocks
+			}
+		}
+		if !isServerSet {
+			args = append(args, "--server", cliOpts.Repo.Rocks)
+		}
 	}
 
 	return args, nil

cli/rocks/rocks_test.go

@@ -72,6 +72,32 @@ func TestAddLuarocksRepoOpts(t *testing.T) {
 			[]string{"--only-server", "/other/repo"}, // No --server option is added.
 			false,
 		},
+		{
+			"Rock repo is specified and --server is passed",
+			args{
+				&config.CliOpts{
+					Repo: &config.RepoOpts{
+						Rocks: "local_path",
+					},
+				},
+				[]string{"--server", "/other/repo"},
+			},
+			[]string{"--server", "/other/repo local_path"},
+			false,
+		},
+		{
+			"Rock repo is specified and --server= is passed",
+			args{
+				&config.CliOpts{
+					Repo: &config.RepoOpts{
+						Rocks: "local_path",
+					},
+				},
+				[]string{"--server=/other/repo"},
+			},
+			[]string{"--server=/other/repo local_path"},
+			false,
+		},
 	}
 
 	for _, tt := range tests {