update README and add more examples

README.md

@@ -17,11 +17,27 @@ want to retrieve.
 port := ssh_config.Get("myhost", "Port")
 ```
 
-Some SSH arguments have default values - for example, the default value for
-`KeyboardAuthentication` is `"yes"`. If we can't find a value for the given
-Host/keyword pair, and a default exists for the keyword, we return it.
+You can also load a config file and read values from it.
 
-Here's how you can manipulate an SSH config file, and then write it back.
+```go
+var config = `
+Host test.test
+  Compression yes
+`
+
+cfg, err := ssh_config.Decode(strings.NewReader(config))
+fmt.Println(cfg.Get("Port"))
+```
+
+Some SSH arguments have default values - for example, the default value for
+`KeyboardAuthentication` is `"yes"`. If you call Get(), and no value for the
+given Host/keyword pair exists in the config, we'll return a default for the
+keyword if one exists.
+
+### Manipulating SSH config files
+
+Here's how you can manipulate an SSH config file, and then write it back to
+disk.
 
 ```go
 f, _ := os.Open(filepath.Join(os.Getenv("HOME"), ".ssh", "config"))
@@ -29,11 +45,13 @@ cfg, _ := ssh_config.Decode(f)
 for _, host := range cfg.Hosts {
     fmt.Println("patterns:", host.Patterns)
     for _, node := range host.Nodes {
+        // Manipulate the nodes as you see fit, or use a type switch to
+        // distinguish between Empty, KV, and Include nodes.
         fmt.Println(node.String())
     }
 }
 
-// Write the cfg back to disk:
+// Print the config to stdout:
 fmt.Println(cfg.String())
 ```
 
@@ -41,7 +59,9 @@ fmt.Println(cfg.String())
 
 Wherever possible we try to implement the specification as documented in
 the `ssh_config` manpage. Unimplemented features should be present in the
-[issues][issues] list. Notably, the `Match` directive is currently unsupported.
+[issues][issues] list.
+
+Notably, the `Match` directive is currently unsupported.
 
 [issues]: https://github.com/kevinburke/ssh_config/issues
 

config.go

@@ -242,8 +242,6 @@ type Config struct {
 // Config contains an invalid conditional Include value.
 //
 // The match for key is case insensitive.
-//
-// Get is a wrapper around DefaultUserSettings.Get.
 func (c *Config) Get(alias, key string) (string, error) {
 	lowerKey := strings.ToLower(key)
 	for _, host := range c.Hosts {

example_test.go

@@ -1,10 +1,15 @@
-package ssh_config
+package ssh_config_test
 
-import "fmt"
+import (
+	"fmt"
+	"strings"
+
+	"github.com/kevinburke/ssh_config"
+)
 
 func ExampleHost_Matches() {
-	pat, _ := NewPattern("test.*.example.com")
-	host := &Host{Patterns: []*Pattern{pat}}
+	pat, _ := ssh_config.NewPattern("test.*.example.com")
+	host := &ssh_config.Host{Patterns: []*ssh_config.Pattern{pat}}
 	fmt.Println(host.Matches("test.stage.example.com"))
 	fmt.Println(host.Matches("othersubdomain.example.com"))
 	// Output:
@@ -13,11 +18,23 @@ func ExampleHost_Matches() {
 }
 
 func ExamplePattern() {
-	pat, _ := NewPattern("*")
-	host := &Host{Patterns: []*Pattern{pat}}
+	pat, _ := ssh_config.NewPattern("*")
+	host := &ssh_config.Host{Patterns: []*ssh_config.Pattern{pat}}
 	fmt.Println(host.Matches("test.stage.example.com"))
 	fmt.Println(host.Matches("othersubdomain.any.any"))
 	// Output:
 	// true
 	// true
 }
+
+func ExampleDecode() {
+	var config = `
+Host *.example.com
+  Compression yes
+`
+
+	cfg, _ := ssh_config.Decode(strings.NewReader(config))
+	val, _ := cfg.Get("test.example.com", "Compression")
+	fmt.Println(val)
+	// Output: yes
+}