Add support for multiple years

Signed-off-by: AKU <tom@tdpain.net>

runtime/main.go

@@ -15,7 +15,8 @@ const (
 )
 
 var args struct {
-	ChallengeDay *int `arg:"-d,--day" help:"challenge day number to run"`
+	Year           string `arg:"-y,--year" help:"AoC year to use"`
+	ChallengeDay   *int   `arg:"-d,--day" help:"challenge day number to run"`
 	Implementation string `arg:"-i,--implementation" help:"implementation to use"`
 }
 
@@ -23,8 +24,14 @@ func run() error {
 
 	arg.MustParse(&args)
 
+	// List and select year
+	selectedYear, err := selectYear(challengeDir)
+	if err != nil {
+		return err
+	}
+
 	// List and select challenges
-	selectedChallenge, err := selectChallenge(challengeDir)
+	selectedChallenge, err := selectChallenge(selectedYear)
 	if err != nil {
 		return err
 	}

runtime/runners/golangRunner.go

@@ -48,7 +48,7 @@ func (g *golangRunner) Run() chan ResultOrError {
 	}
 
 	// determine package import path
-	buildPath := fmt.Sprintf("github.com/codemicro/adventOfCode/challenges/%s", filepath.Base(g.dir))
+	buildPath := fmt.Sprintf("github.com/codemicro/adventOfCode/challenges/%s/%s", filepath.Base(filepath.Dir(g.dir)), filepath.Base(g.dir))
 	importPath := buildPath + "/go"
 
 	// generate code

runtime/selections.go

@@ -6,6 +6,8 @@ import (
 	"github.com/AlecAivazis/survey/v2"
 	"github.com/codemicro/adventOfCode/runtime/challenge"
 	"github.com/codemicro/adventOfCode/runtime/runners"
+	"os"
+	"path/filepath"
 	"strings"
 )
 
@@ -30,6 +32,51 @@ func userSelect(question string, choices []string) (int, error) {
 	return -1, nil
 }
 
+func selectYear(dir string) (string, error) {
+
+	var opts []string
+
+    entries, err := os.ReadDir(dir)
+	if err != nil {
+        return "", err
+    }
+
+	for _, entry := range entries {
+		if !entry.IsDir() {
+			continue
+		}
+		opts = append(opts, entry.Name())
+	}
+
+	if len(opts) == 0 {
+		return "", errors.New("no years to use")
+	}
+
+	if args.Year != "" {
+		for _, x := range opts {
+            if x == args.Year {
+                fmt.Printf("Selecting year %s\n", args.Year)
+				return filepath.Join(dir, x), nil
+            }
+        }
+        fmt.Printf("Could not locate year %s\n", args.Year)
+	}
+
+	var selectedYearIndex int
+
+	if x := len(opts); x == 1 {
+		selectedYearIndex = 0
+		fmt.Printf("Automatically selecting year %s\n", opts[selectedYearIndex])
+	} else {
+		selectedYearIndex, err = userSelect("Which year do you want to use?", opts)
+		if err != nil {
+			return "", err
+		}
+	}
+
+    return filepath.Join(dir, opts[selectedYearIndex]), nil
+}
+
 func selectChallenge(dir string) (*challenge.Challenge, error) {
 
 	challenges, err := challenge.ListingFromDir(dir)