fn: rename from fnctl (#321)

* fn: rename from fnctl

* fn: predicting the release version for installer

* fn: predicting the release version for installer

fn/main.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"fmt"
+	"net/url"
+	"os"
+
+	functions "github.com/iron-io/functions_go"
+	"github.com/urfave/cli"
+)
+
+func main() {
+	app := cli.NewApp()
+	app.Name = "fn"
+	app.Version = "0.1.0"
+	app.Authors = []cli.Author{{Name: "iron.io"}}
+	app.Usage = "IronFunctions command line tools"
+	app.UsageText = `Check the manual at https://github.com/iron-io/functions/blob/master/fn/README.md
+
+ENVIRONMENT VARIABLES:
+   API_URL - IronFunctions remote API address`
+	app.CommandNotFound = func(c *cli.Context, cmd string) { fmt.Fprintf(os.Stderr, "command not found: %v\n", cmd) }
+	app.Commands = []cli.Command{
+		apps(),
+		build(),
+		bump(),
+		call(),
+		lambda(),
+		publish(),
+		push(),
+		routes(),
+		run(),
+		initFn(),
+	}
+	app.Run(os.Args)
+}
+
+func resetBasePath(c *functions.Configuration) error {
+	apiURL := os.Getenv("API_URL")
+	if apiURL == "" {
+		apiURL = "http://localhost:8080/"
+	}
+
+	u, err := url.Parse(apiURL)
+	if err != nil {
+		return err
+	}
+	u.Path = "/v1"
+	c.BasePath = u.String()
+
+	return nil
+}