Add logging for invalid model errors (#126)

Add logging for invalid model errors

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/api/pulls/126

vendor/github.com/cweill/gotests/internal/input/input.go

@@ -0,0 +1,54 @@
+package input
+
+import (
+	"fmt"
+	"path"
+	"path/filepath"
+	"os"
+
+	"github.com/cweill/gotests/internal/models"
+)
+
+// Returns all the Golang files for the given path. Ignores hidden files.
+func Files(srcPath string) ([]models.Path, error) {
+	srcPath, err := filepath.Abs(srcPath)
+	if err != nil {
+		return nil, fmt.Errorf("filepath.Abs: %v\n", err)
+	}
+	var fi os.FileInfo
+	if fi, err = os.Stat(srcPath); err != nil {
+		return nil, fmt.Errorf("os.Stat: %v\n", err)
+	}
+	if fi.IsDir() {
+		return dirFiles(srcPath)
+	}
+	return file(srcPath)
+}
+
+func dirFiles(srcPath string) ([]models.Path, error) {
+	ps, err := filepath.Glob(path.Join(srcPath, "*.go"))
+	if err != nil {
+		return nil, fmt.Errorf("filepath.Glob: %v\n", err)
+	}
+	var srcPaths []models.Path
+	for _, p := range ps {
+		src := models.Path(p)
+		if isHiddenFile(p) || src.IsTestPath() {
+			continue
+		}
+		srcPaths = append(srcPaths, src)
+	}
+	return srcPaths, nil
+}
+
+func file(srcPath string) ([]models.Path, error) {
+	src := models.Path(srcPath)
+	if filepath.Ext(srcPath) != ".go" || isHiddenFile(srcPath) {
+		return nil, fmt.Errorf("no Go source files found at %v", srcPath)
+	}
+	return []models.Path{src}, nil
+}
+
+func isHiddenFile(path string) bool {
+	return []rune(filepath.Base(path))[0] == '.'
+}