Fixes some coding mistakes, now the code compiles again

compiler/compile.go

@@ -15,6 +15,7 @@
 package compiler
 
 import (
+	"fmt"
 	"os"
 	"path/filepath"
 
@@ -28,31 +29,34 @@ func CompileDir(path string, opts *settings.Settings) {
 	// Find all scores
 	scores, collector := generateScores()
 	filepath.Walk(path, compilePath(path, opts, collector))
+
+	fmt.Println(scores)
 }
 
 func generateScores() ([]*settings.Score, func(string, os.FileInfo) error) {
-	scores := make([]*settings.Score)
+	var scores []*settings.Score
 	return scores, func(path string, file os.FileInfo) error {
 		switch filepath.Ext(path) {
 		case ".ly":
 			log.WithFields(log.Fields{"path": path}).Info("adding lilypond file")
-			append(scores, &settings.Score{Path: path})
+			scores = append(scores, &settings.Score{Path: path})
 
 		case ".json":
 			if filepath.Base(path) != "ponder.json" {
 				log.WithFields(log.Fields{"path": path}).Info("adding json file")
-				if score, err := fromJSON(path); err != nil {
+				if score, err := settings.FromJSON(path); err != nil {
 					log.WithFields(log.Fields{
 						"error": err,
 						"path":  path,
 					}).Warning("unable to parse score settings, skipping...")
 				} else {
-					append(scores, score)
+					scores = append(scores, score)
 				}
 			}
 
 		default:
 			log.WithFields(log.Fields{"path": path}).Debug("ignoring file")
 		}
+		return nil
 	}
 }

compiler/file_discovery.go

@@ -27,11 +27,11 @@ import (
 // of the ignored directories
 func compilePath(root string, opts *settings.Settings,
 	f func(string, os.FileInfo) error) filepath.WalkFunc {
-	return func(path string, info os.FileInfo, err error) error {
+	return func(path string, info os.FileInfo, walkError error) error {
 		// Handle walking error
-		if err != nil {
+		if walkError != nil {
-			log.withFields(log.Fields{
+			log.WithFields(log.Fields{
-				"error": err,
+				"error": walkError,
 				"path":  path,
 			}).Warning("error occurred transversing project path")
 			return nil
@@ -39,9 +39,9 @@ func compilePath(root string, opts *settings.Settings,
 
 		if info.IsDir() {
 			// Skip directories that are ignored
-			relPath, err = filepath.Rel(root, path)
+			relPath, err := filepath.Rel(root, path)
 			helpers.Check(err, "Unable to create relative Path")
-			for dir := range append(append(opts.IgnoreDirs, opts.LilypondIncludes), []string{opts.OutputDir}) {
+			for _, dir := range append(append(opts.IgnoreDirs, opts.LilypondIncludes...), opts.OutputDir) {
 				if relPath == dir || (filepath.IsAbs(dir) && path == dir) {
 					log.WithFields(log.Fields{"path": path}).Info("Ignoring directory")
 					return filepath.SkipDir
@@ -49,7 +49,7 @@ func compilePath(root string, opts *settings.Settings,
 			}
 		} else {
 			// Call function on non-directory
-			err = f(path, info)
+			err := f(path, info)
 			if err != nil {
 				log.WithFields(log.Fields{
 					"error": err,

compiler/lilypond.go

@@ -31,7 +31,7 @@ var (
 // compilation function using the given settings
 func PrepareLilypond(opts *settings.Settings) {
 	// Adds all includes to the lilypond arguments
-	for dir := range opts.LilypondIncludes {
+	for _, dir := range opts.LilypondIncludes {
 		lilypondArgs = append(lilypondArgs, "--include=\""+dir+"\"")
 	}
 	lilypondArgs = append(lilypondArgs, "--loglevel=ERROR")
@@ -40,7 +40,7 @@ func PrepareLilypond(opts *settings.Settings) {
 	// TODO: Make this an absolute path.
 	lilypondArgs = append(lilypondArgs, "--output=\""+opts.OutputDir+"\"")
 	if !helpers.Exists(opts.OutputDir) {
-		err := os.MkdirAll(path, os.ModePerm)
+		err := os.MkdirAll(opts.OutputDir, os.ModePerm)
 		helpers.Check(err, "Could not create output directory")
 	}
 }
@@ -49,5 +49,6 @@ func PrepareLilypond(opts *settings.Settings) {
 // using the arguments prepared by the PrepareLilypond function
 func Lilypond(path string) (string, error) {
 	cmd := exec.Command(lilypondCmd, append(lilypondArgs, path)...)
-	return cmd.CombinedOutput()
+	out, err := cmd.CombinedOutput()
+	return string(out), err
 }