examples: add scripts examples (js, ruby etc..)

Readme.md

@@ -151,7 +151,22 @@ hello:
   script: path/to/script.sh
 ```
 
- Script paths are relative to the _config_ file, not the working directory.
+ If the script is executable, it is invoked directly, this allows you
+ to use `#!`:
+
+```
+$ echo -e '#!/usr/bin/env ruby\nputs "yo"' > yo.rb
+$ chmod +x yo.rb
+$ cat > robo.yml
+yo:
+  summary: yo from rb
+  script: yo.rb
+^C
+$ robo yo
+yo
+```
+
+Script paths are relative to the _config_ file, not the working directory.
 
 ### Usage
 

_examples/scripts/scripts.yml

@@ -0,0 +1,8 @@
+
+ruby:
+  summary: prints yo! from ruby
+  script: yo.rb
+
+js:
+  summary: prints yo! from js
+  script: yo.js

_examples/scripts/yo.js

@@ -0,0 +1,3 @@
+#!/usr/bin/env node
+
+console.log("yo!")

_examples/scripts/yo.rb

@@ -0,0 +1,3 @@
+#!/usr/bin/env ruby
+
+puts "yo!"

main.go

@@ -1,6 +1,8 @@
 package main
 
 import (
+	"path/filepath"
+
 	"github.com/tj/docopt"
 	"github.com/tj/robo/cli"
 	"github.com/tj/robo/config"
@@ -38,8 +40,12 @@ func main() {
 		cli.Fatalf("error parsing arguments: %s", err)
 	}
 
-	file := args["--config"].(string)
-	c, err := config.New(file)
+	abs, err := filepath.Abs(args["--config"].(string))
+	if err != nil {
+		cli.Fatalf("cannot resolve --config: %s", err)
+	}
+
+	c, err := config.New(abs)
 	if err != nil {
 		cli.Fatalf("error loading configuration: %s", err)
 	}