initial commit

cmd/mrpaths.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/taigrr/mg/parse"
+)
+
+func main() {
+	mrconf, err := parse.LoadMRConfig()
+	if err != nil {
+		panic(err)
+	}
+	for _, path := range mrconf.GetRepoPaths() {
+		fmt.Println(path)
+	}
+}

go.mod

@@ -0,0 +1,3 @@
+module github.com/taigrr/mg
+
+go 1.19

parse/myrepos.go

@@ -0,0 +1,92 @@
+package parse
+
+import (
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type MRConfig struct {
+	Unregister string
+	GC         string
+	Repos      []Repo
+}
+type Repo struct {
+	Path     string
+	Checkout string
+}
+
+func (m MRConfig) GetRepoPaths() []string {
+	paths := []string{}
+	for _, r := range m.Repos {
+		paths = append(paths, r.Path)
+	}
+	return paths
+}
+
+func LoadMRConfig() (MRConfig, error) {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return MRConfig{}, err
+	}
+	mrconfPath := filepath.Join(home, ".mrconfig")
+	s, err := os.Stat(mrconfPath)
+	if err != nil {
+		return MRConfig{}, err
+	}
+	if s.IsDir() {
+		return MRConfig{}, errors.New("expected mrconfig file but got a directory")
+	}
+	f, err := ioutil.ReadFile(mrconfPath)
+	if err != nil {
+		return MRConfig{}, err
+	}
+	text := string(f)
+	lines := strings.Split(text, "\n")
+	config := MRConfig{}
+
+	length := -1
+	mode := "default"
+	for n, line := range lines {
+		if line == "" {
+			continue
+		}
+		if line == "[DEFAULT]" {
+			mode = "default"
+			continue
+		} else if strings.HasPrefix(line, "[") && strings.HasSuffix(line, "]") {
+			length++
+			path := strings.Trim(line, "[]")
+			if !strings.HasPrefix(path, "/") {
+				path = filepath.Join(home, path)
+			}
+			mode = "repo"
+			config.Repos = append(config.Repos, Repo{Path: path})
+			continue
+		}
+		split := strings.SplitN(line, " = ", 2)
+		if len(split) != 2 {
+			return MRConfig{}, fmt.Errorf("unexpected argument on line %d: %s", n, line)
+		}
+		switch mode {
+		case "repo":
+			if split[0] != "checkout" {
+				return MRConfig{}, fmt.Errorf("unexpected argument on line %d: %s", n, line)
+			}
+			config.Repos[length].Checkout = split[1]
+		case "default":
+			switch split[0] {
+			case "unregister":
+				config.Unregister = split[1]
+			case "git_gc":
+				config.GC = split[1]
+			default:
+				return MRConfig{}, fmt.Errorf("unexpected argument on line %d: %s", n, line)
+			}
+		}
+	}
+	return config, nil
+}