Merge pull request #122 from posener/gen

Autogenerate compflag code

1 files changed, 67 insertions, 0 deletions

diff --git a/compflag/gen/main.go b/compflag/gen/main.go
new file mode 100644
index 0000000..cbea96f
--- /dev/null
+++ b/compflag/gen/main.go
@@ -0,0 +1,67 @@
+// Generates flags.go.
+package main
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+	"text/template"
+
+	"github.com/posener/script"
+)
+
+const tmplGlob = "gen/*.go.gotmpl"
+
+type flag struct {
+	Name          string
+	Type          string
+	IsBool        bool
+	CustomPredict bool
+}
+
+func (f flag) NewInternalTypeFuncName() string {
+	return "new" + strings.Title(f.InternalTypeName())
+}
+
+func (f flag) InternalTypeName() string {
+	return strings.ToLower(f.Name[:1]) + f.Name[1:] + "Value"
+}
+
+var flags = []flag{
+	{Name: "String", Type: "string"},
+	{Name: "Bool", Type: "bool", IsBool: true, CustomPredict: true},
+	{Name: "Int", Type: "int"},
+	{Name: "Duration", Type: "time.Duration"},
+}
+
+var tmpl = template.Must(template.ParseGlob(tmplGlob))
+
+func main() {
+	for _, t := range tmpl.Templates() {
+		fileName := outFileName(t.Name())
+		f, err := os.Create(fileName)
+		if err != nil {
+			panic(err)
+		}
+		defer f.Close()
+
+		log.Printf("Writing %s", fileName)
+		err = t.Execute(f, flags)
+		if err != nil {
+			panic(err)
+		}
+
+		// Format the file.
+		err = script.ExecHandleStderr(os.Stderr, "goimports", "-w", fileName).ToStdout()
+		if err != nil {
+			panic(err)
+		}
+	}
+}
+
+func outFileName(templateName string) string {
+	name := filepath.Base(templateName)
+	// Remove .gotmpl suffix.
+	return name[:strings.LastIndex(name, ".")]
+}