Move .solution.json to hidden subdirectory

cmd/download.go

@@ -16,6 +16,8 @@ import (
 	"github.com/spf13/cobra"
 )
 
+const hiddenSolutionDir = ".exercism"
+
 // downloadCmd represents the download command
 var downloadCmd = &cobra.Command{
 	Use:     "download",

cmd/download_test.go

@@ -84,7 +84,7 @@ func TestDownload(t *testing.T) {
 		},
 		{
 			desc:     "It creates the .solution.json file.",
-			path:     filepath.Join(cmdTest.TmpDir, "bogus-track", "bogus-exercise", ".solution.json"),
+			path:     filepath.Join(cmdTest.TmpDir, "bogus-track", "bogus-exercise", "./.exercism/.solution.json"),
 			contents: `{"track":"bogus-track","exercise":"bogus-exercise","id":"bogus-id","url":"","handle":"alice","is_requester":true,"auto_approve":false}`,
 		},
 	}

workspace/solution.go

@@ -12,8 +12,11 @@ import (
 	"github.com/exercism/cli/visibility"
 )
 
+const ignoreSubdir = ".exercism"
 const solutionFilename = ".solution.json"
 
+var solutionRelPath = filepath.Join(ignoreSubdir, solutionFilename)
+
 // Solution contains metadata about a user's solution.
 type Solution struct {
 	Track       string     `json:"track"`
@@ -29,7 +32,7 @@ type Solution struct {
 
 // NewSolution reads solution metadata from a file in the given directory.
 func NewSolution(dir string) (*Solution, error) {
-	path := filepath.Join(dir, solutionFilename)
+	path := filepath.Join(dir, solutionRelPath)
 	b, err := ioutil.ReadFile(path)
 	if err != nil {
 		return &Solution{}, err
@@ -67,11 +70,13 @@ func (s *Solution) Write(dir string) error {
 		return err
 	}
 
-	path := filepath.Join(dir, solutionFilename)
+	path := filepath.Join(dir, ignoreSubdir)
+	_ = os.Mkdir(path, os.FileMode(0755))
 
 	// Hack because ioutil.WriteFile fails on hidden files
 	visibility.ShowFile(path)
 
+	path = filepath.Join(dir, solutionRelPath)
 	if err := ioutil.WriteFile(path, b, os.FileMode(0600)); err != nil {
 		return err
 	}

workspace/workspace.go

@@ -191,7 +191,7 @@ func (ws Workspace) SolutionDir(s string) (string, error) {
 		if _, err := os.Lstat(path); os.IsNotExist(err) {
 			return "", err
 		}
-		if _, err := os.Lstat(filepath.Join(path, solutionFilename)); err == nil {
+		if _, err := os.Lstat(filepath.Join(path, solutionRelPath)); err == nil {
 			return path, nil
 		}
 		path = filepath.Dir(path)