make executable

4 files changed, 49 insertions, 3 deletions

diff --git a/filter.go b/filter.go
index 0edecba..dec3cd8 100644
--- a/filter.go
+++ b/filter.go
@@ -1,4 +1,4 @@
-package svn2git2aur
+package main
 
 import (
 	"bytes"
diff --git a/git.go b/git.go
index 1adb461..d43c05d 100644
--- a/git.go
+++ b/git.go
@@ -1,4 +1,4 @@
-package svn2git2aur
+package main
 
 import (
 	"bytes"
diff --git a/heuristics.go b/heuristics.go
index 1ae4395..9fc44e5 100644
--- a/heuristics.go
+++ b/heuristics.go
@@ -1,4 +1,4 @@
-package svn2git2aur
+package main
 
 import (
 	"path"
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..ad158c1
--- /dev/null
+++ b/main.go
@@ -0,0 +1,46 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+func usage(w io.Writer) {
+	fmt.Fprintf(w, "Usage: %s refs/FROM_REFNAME refs/TO_PREFIX\n", os.Args[0])
+	fmt.Fprintf(w, "   or: %s -h|--help\n", os.Args[0])
+	fmt.Fprintf(w, "Read an Arch Linux svn2git branch, and turn it into AUR-style branches\n")
+}
+
+func main() {
+	for _, arg := range os.Args[1:] {
+		switch arg {
+		case "-h", "--help":
+			usage(os.Stdout)
+			os.Exit(0)
+		}
+	}
+	if len(os.Args) != 3 {
+		usage(os.Stderr)
+		os.Exit(2)
+	}
+	fromRef := os.Args[1]
+	toPfx := os.Args[2]
+	if !strings.HasPrefix(fromRef, "refs/") || !strings.HasPrefix(fromRef, "refs/") {
+		fmt.Fprintln(os.Stderr, "ref names and prefixes must start with \"refs/\"")
+		usage(os.Stderr)
+		os.Exit(2)
+	}
+
+	filter, err := NewFilter(fromRef, toPfx)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "Could not initialize filter:", err)
+		os.Exit(1)
+	}
+	err = filter.Run()
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "Error:", err)
+		os.Exit(1)
+	}
+}