Vegeta as a library

* Slicker API
* Privatises a bunch of stuff
* More tests
* More documentation

lib/targets.go

@@ -0,0 +1,70 @@
+package vegeta
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"math/rand"
+	"net/http"
+	"os"
+	"strings"
+)
+
+// Targets represents the http.Requests which will be issued during the test
+type Targets []*http.Request
+
+// NewTargetsFromFile reads and parses targets from a text file
+func NewTargetsFromFile(filename string) (Targets, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return Targets{}, err
+	}
+	defer file.Close()
+	return readTargets(file)
+}
+
+// readTargets reads targets out of a line separated source skipping empty lines
+func readTargets(source io.Reader) (Targets, error) {
+	scanner := bufio.NewScanner(source)
+	lines := make([]string, 0)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if line = strings.TrimSpace(line); line == "" { // Empty line
+			continue
+		}
+		lines = append(lines, line)
+	}
+	if err := scanner.Err(); err != nil {
+		return Targets{}, err
+	}
+
+	return NewTargets(lines)
+}
+
+// NewTargets instantiates Targets from a slice of strings
+func NewTargets(lines []string) (Targets, error) {
+	targets := make([]*http.Request, 0)
+	for _, line := range lines {
+		parts := strings.SplitN(line, " ", 2)
+		if len(parts) != 2 {
+			return targets, fmt.Errorf("Invalid request format: `%s`", line)
+		}
+		// Build request
+		req, err := http.NewRequest(parts[0], parts[1], nil)
+		if err != nil {
+			return targets, fmt.Errorf("Failed to build request: %s", err)
+		}
+		targets = append(targets, req)
+	}
+	return targets, nil
+}
+
+// Shuffle randomly alters the order of Targets with the provided seed
+func (t Targets) Shuffle(seed int64) {
+	rand.Seed(seed)
+	for i, rnd := range rand.Perm(len(t)) {
+		tmp := t[i]
+		t[i] = t[rnd]
+		t[rnd] = tmp
+	}
+}