add an init generator

Makefile

@@ -28,6 +28,7 @@ update:
 	$(GO_BIN) mod tidy
 	packr
 	make test
+	make install
 
 release-test:
 	$(GO_BIN) test -tags ${TAGS} -race ./...

cmd/init.go

@@ -5,13 +5,15 @@ import (
 
 	"github.com/gobuffalo/genny"
 	"github.com/gobuffalo/release/genny/goreleaser"
+	"github.com/gobuffalo/release/genny/init"
 	"github.com/gobuffalo/release/genny/makefile"
 	"github.com/gobuffalo/release/genny/release"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 )
 
 var initOptions = struct {
+	*init.Options
 	dryRun      bool
 	force       bool
 	mainFile    string

genny/init/init.go

@@ -0,0 +1,46 @@
+package init
+
+import (
+	"github.com/gobuffalo/genny"
+	"github.com/gobuffalo/release/genny/goreleaser"
+	"github.com/gobuffalo/release/genny/makefile"
+	"github.com/gobuffalo/release/genny/release"
+	"github.com/pkg/errors"
+)
+
+func New(opts *Options) (*genny.Group, error) {
+	gg := &genny.Group{}
+
+	g := genny.New()
+
+	if err := opts.Validate(); err != nil {
+		return gg, errors.WithStack(err)
+	}
+
+	g.RunFn(release.WriteVersionFile(&release.Options{
+		VersionFile: opts.VersionFile,
+		Version:     opts.Version,
+	}))
+	gg.Add(g)
+
+	g, err := makefile.New(&makefile.Options{
+		Force:       opts.Force,
+		VersionFile: opts.VersionFile,
+	})
+	if err != nil {
+		return gg, errors.WithStack(err)
+	}
+	gg.Add(g)
+
+	if len(opts.MainFile) != 0 {
+		g, err = goreleaser.New(&goreleaser.Options{
+			Force:    opts.Force,
+			MainFile: opts.MainFile,
+		})
+		if err != nil {
+			return gg, errors.WithStack(err)
+		}
+		gg.Add(g)
+	}
+	return gg, nil
+}

genny/init/init_test.go

@@ -0,0 +1,39 @@
+package init
+
+import (
+	"context"
+	"testing"
+
+	"github.com/gobuffalo/genny"
+	"github.com/stretchr/testify/require"
+)
+
+func Test_New(t *testing.T) {
+	r := require.New(t)
+
+	gg, err := New(&Options{
+		VersionFile: "foo/bar/version.go",
+		MainFile:    "./main.go",
+	})
+	r.NoError(err)
+
+	run := genny.DryRunner(context.Background())
+	run.WithGroup(gg)
+
+	r.NoError(run.Run())
+
+	res := run.Results()
+
+	r.Len(res.Commands, 0)
+	r.Len(res.Files, 3)
+
+	f := res.Files[0]
+	r.Equal(".goreleaser.yml", f.Name())
+
+	f = res.Files[1]
+	r.Equal("Makefile", f.Name())
+
+	f = res.Files[2]
+	r.Equal("foo/bar/version.go", f.Name())
+	r.Contains(f.String(), `const Version = "v0.0.1"`)
+}

genny/init/options.go

@@ -0,0 +1,19 @@
+package init
+
+type Options struct {
+	VersionFile string
+	Version     string
+	MainFile    string
+	Force       bool
+}
+
+// Validate that options are usuable
+func (opts *Options) Validate() error {
+	if len(opts.Version) == 0 {
+		opts.Version = "v0.0.1"
+	}
+	if len(opts.VersionFile) == 0 {
+		opts.Version = "version.go"
+	}
+	return nil
+}

genny/makefile/templates/Makefile.plush

@@ -27,7 +27,8 @@ update:
 	$(GO_BIN) get -u
 	$(GO_BIN) mod tidy
 	packr
-	make test
+  make test
+  make install
 
 release-test:
 	$(GO_BIN) test -tags ${TAGS} -race ./...