Add init command

cmd/init.go

@@ -0,0 +1,61 @@
+package cmd
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+type Init struct {
+	Directory string `arg optional name:"directory" default:"."`
+}
+
+func (cmd *Init) Run() error {
+	path, err := filepath.Abs(cmd.Directory)
+	if err != nil {
+		return err
+	}
+
+	if existingPath, err := locateZk(path); err == nil {
+		return fmt.Errorf("a slip box already exists in %v", existingPath)
+	}
+
+	// Create .zk and .zk/templates directories.
+	err = os.MkdirAll(filepath.Join(path, ".zk/templates"), os.ModePerm)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+var ErrNotFound = errors.New("slip box not found")
+
+// locate finds the root of the slip box containing the given path.
+func locateZk(path string) (string, error) {
+	if path == "/" || path == "." {
+		return "", ErrNotFound
+	}
+	if !filepath.IsAbs(path) {
+		panic("locateZk expects an absolute path")
+	}
+	if dotPath := filepath.Join(path, ".zk"); dirExists(dotPath) {
+		return path, nil
+	}
+
+	return locateZk(filepath.Dir(path))
+}
+
+func dirExists(path string) bool {
+	fi, err := os.Stat(path)
+	if err != nil {
+		return false
+	}
+	switch mode := fi.Mode(); {
+	case mode.IsDir():
+		return true
+	default:
+		return false
+	}
+}

go.mod

@@ -0,0 +1,5 @@
+module github.com/mickael-menu/zk
+
+go 1.15
+
+require github.com/alecthomas/kong v0.2.12

go.sum

@@ -0,0 +1,7 @@
+github.com/alecthomas/kong v0.2.12 h1:X3kkCOXGUNzLmiu+nQtoxWqj4U2a39MpSJR3QdQXOwI=
+github.com/alecthomas/kong v0.2.12/go.mod h1:kQOmtJgV+Lb4aj+I2LEn40cbtawdWJ9Y8QLq+lElKxE=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=

main.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"github.com/alecthomas/kong"
+	"github.com/mickael-menu/zk/cmd"
+)
+
+var cli struct {
+	Init cmd.Init `cmd help:"Create a slip box in the given directory"`
+}
+
+func main() {
+	ctx := kong.Parse(&cli,
+		kong.Name("zk"),
+	)
+	err := ctx.Run()
+	ctx.FatalIfErrorf(err)
+}