Updated README.

Author: beefsack

README.md

@@ -1,2 +1,36 @@
-# git-mirror
-Mirror Git repositories without effort
+# git-mirror - simple Git mirrors
+
+`git-mirror` is designed to create and serve read-only mirrors of your Git repositories locally or wherever you choose.  A recent GitHub outage reinforces the fact that developers shouldn't be relying on a single remote for hosting code.
+
+A major design goal of `git-mirror` is that it should just work with as little configuration as possible.
+
+## Get started
+
+1. Download and extract the latest release from the [releases page](https://github.com/beefsack/git-mirror/releases).
+1. Create `config.toml` similar to:
+```toml
+[[repo]]
+Origin = "https://github.com/beefsack/git-mirror.git"
+```
+By default it will update the mirror every **15 minutes** and will serve the mirror over HTTP using port **8080**.  You can specify as many repos as you want by having multiple `[[repo]]` sections.
+1. Run `git-mirror` with the path to the config file:
+```bash
+$ ./git-mirror config.toml
+2015/05/07 11:08:06 starting web server on :8080
+2015/05/07 11:08:06 updating github.com/beefsack/git-mirror.git
+2015/05/07 11:08:08 updated github.com/beefsack/git-mirror.git
+```
+1. Now you can clone from your mirror on the default port of `8080`:
+```bash
+$ git clone http://localhost:8080/github.com/beefsack/git-mirror.git
+Cloning into 'git-mirror'...
+Checking connectivity... done.
+```
+
+## Advanced configuration
+
+See [the example config](example-config.toml) for more advanced configurations.
+
+## Authentication and authorisation
+
+If you wish to control access to the mirror or specific repositories, consider proxying to `git-mirror` using a web server such as Nginx.

config.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"path/filepath"
 	"fmt"
 	"io/ioutil"
 	"net/url"
@@ -54,6 +55,9 @@ func parseConfig(filename string) (cfg config, repos map[string]repo, err error)
 	if cfg.BasePath == "" {
 		cfg.BasePath = "."
 	}
+	if cfg.BasePath, err = filepath.Abs(cfg.BasePath); err != nil {
+		err = fmt.Errorf("unable to get absolute path to base path, %s", err)
+	}
 
 	// Fetch repos, injecting default values where needed.
 	if cfg.Repo == nil || len(cfg.Repo) == 0 {