Rename to GitHub (#3)

* circle

* Rename to github and fn->cli

*  Rename to github and fn->cli

cli/build.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/urfave/cli"
+)
+
+func build() cli.Command {
+	cmd := buildcmd{}
+	flags := append([]cli.Flag{}, cmd.flags()...)
+	return cli.Command{
+		Name:   "build",
+		Usage:  "build function version",
+		Flags:  flags,
+		Action: cmd.build,
+	}
+}
+
+type buildcmd struct {
+	verbose bool
+	noCache bool
+}
+
+func (b *buildcmd) flags() []cli.Flag {
+	return []cli.Flag{
+		cli.BoolFlag{
+			Name:        "v",
+			Usage:       "verbose mode",
+			Destination: &b.verbose,
+		},
+		cli.BoolFlag{
+			Name:        "no-cache",
+			Usage:       "Don't use docker cache",
+			Destination: &b.noCache,
+		},
+	}
+}
+
+// build will take the found valid function and build it
+func (b *buildcmd) build(c *cli.Context) error {
+	verbwriter := verbwriter(b.verbose)
+
+	path, err := os.Getwd()
+	if err != nil {
+		return err
+	}
+	fn, err := findFuncfile(path)
+	if err != nil {
+		return err
+	}
+
+	ff, err := buildfunc(verbwriter, fn, b.noCache)
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("Function %v built successfully.\n", ff.FullName())
+	return nil
+}