executing scripts now

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

cmd/herald-worker/main.go

@@ -4,6 +4,7 @@ import "github.com/heroku/herald"
 // todo: name that herlad
 import "time"
 import "log"
+import "fmt"
 
 
 
@@ -28,8 +29,11 @@ func main() {
 				// TODO: Ensure chmod for the executable.
 				exe.EnsureExecutable()
 
+				// Execute the executable, print the results. 
+				fmt.Print(exe.Execute())
+
 				// 
-				log.Printf("Execututing '%s:%s' script…", bp, exe)
+				log.Printf("Executing '%s:%s' script…", bp, exe)
 			}
 		}
 

herald.go

@@ -8,6 +8,8 @@ import "log"
 import "path/filepath"
 import "strings"
 import "os"
+import "os/exec"
+// import "io"
 
 const BP_BRANCH = "versions"
 const BP_TARBALL_TEMPLATE = "https://github.com/heroku/heroku-buildpack-%s/archive/%s.zip"
@@ -47,6 +49,17 @@ func (e Executable) EnsureExecutable() {
 	}
 }
 
+// Executes the given executable, and returns results.
+func (e Executable) Execute() []string {
+	out, err := exec.Command(e.Path).Output()
+	if err != nil {
+		// TODO: Update this to return, etc. 
+		log.Fatal(err)
+	}
+	return strings.Split(string(out), "\n")
+
+}
+
 // Returns the GitHub ZipBall URI for the given buildpack. 
 func (b Buildpack) ZipballURI() string {
 	return fmt.Sprintf(BP_TARBALL_TEMPLATE, b.Name, BP_BRANCH)