refactor: migrate repo to struct

pkg/repos/utils.go

@@ -0,0 +1,83 @@
+package repos
+
+import (
+	"context"
+	"io"
+	"path/filepath"
+	"reflect"
+	"strings"
+
+	"github.com/go-git/go-git/v5/plumbing/format/diff"
+	"mvdan.cc/sh/v3/interp"
+	"mvdan.cc/sh/v3/syntax"
+	"plemya-x.ru/alr/internal/db"
+	"plemya-x.ru/alr/internal/shutils/decoder"
+	"plemya-x.ru/alr/pkg/distro"
+)
+
+// isValid makes sure the path of the file being updated is valid.
+// It checks to make sure the file is not within a nested directory
+// and that it is called alr.sh.
+func isValid(from, to diff.File) bool {
+	var path string
+	if from != nil {
+		path = from.Path()
+	}
+	if to != nil {
+		path = to.Path()
+	}
+
+	match, _ := filepath.Match("*/*.sh", path)
+	return match
+}
+
+func parseScript(ctx context.Context, parser *syntax.Parser, runner *interp.Runner, r io.ReadCloser, pkg *db.Package) error {
+	defer r.Close()
+	fl, err := parser.Parse(r, "alr.sh")
+	if err != nil {
+		return err
+	}
+
+	runner.Reset()
+	err = runner.Run(ctx, fl)
+	if err != nil {
+		return err
+	}
+
+	d := decoder.New(&distro.OSRelease{}, runner)
+	d.Overrides = false
+	d.LikeDistros = false
+	return d.DecodeVars(pkg)
+}
+
+var overridable = map[string]string{
+	"deps":       "Depends",
+	"build_deps": "BuildDepends",
+	"desc":       "Description",
+	"homepage":   "Homepage",
+	"maintainer": "Maintainer",
+}
+
+func resolveOverrides(runner *interp.Runner, pkg *db.Package) {
+	pkgVal := reflect.ValueOf(pkg).Elem()
+	for name, val := range runner.Vars {
+		for prefix, field := range overridable {
+			if strings.HasPrefix(name, prefix) {
+				override := strings.TrimPrefix(name, prefix)
+				override = strings.TrimPrefix(override, "_")
+
+				field := pkgVal.FieldByName(field)
+				varVal := field.FieldByName("Val")
+				varType := varVal.Type()
+
+				switch varType.Elem().String() {
+				case "[]string":
+					varVal.SetMapIndex(reflect.ValueOf(override), reflect.ValueOf(val.List))
+				case "string":
+					varVal.SetMapIndex(reflect.ValueOf(override), reflect.ValueOf(val.Str))
+				}
+				break
+			}
+		}
+	}
+}