feat(wren-launcher): put accounts file into volume, fix file format

docker/bootstrap/init.sh

@@ -33,7 +33,7 @@ fi
 
 # put a accounts file in data_path if not exists
 # accounts is a file contains the authentication information
-# the format is like: `username: password` per line
+# the format is like: `username password` per line
 if [ ! -f ${data_path}/accounts ]; then
-  echo "${pg_username}: ${pg_password}" > ${data_path}/accounts
+  echo "${pg_username} ${pg_password}" > ${data_path}/accounts
 fi

wren-launcher/utils/rc.go

@@ -0,0 +1,87 @@
+// the wrenrc.go package is responsible for writing and reading rcfile
+// the rc file should located in ~/.wrenai/.wrenrc
+// should have  public methods "append" and "read"(read by key or all)
+// the structure of the rcfile is a env like file with key value pairs,
+// eg:
+//   "foo=bar"
+//   "bar=baz"
+
+package utils
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"strings"
+)
+
+type WrenRC struct {
+	rcFileDir string
+}
+
+func ParseInto(w *WrenRC, baseName string) {
+	f, filename := openFile(baseName)
+	if f == nil {
+		return
+	}
+	defer f.Close()
+
+	r := bufio.NewReader(f)
+	lineno := 0
+	for {
+		l, err := r.ReadString('\n')
+		if err != nil {
+			break
+		}
+		lineno++
+		l = strings.Trim(l, " \t\v\r\n")
+
+		if len(l) == 0 {
+			continue
+		}
+		if l[0] == '#' || l[0] == ';' {
+			continue
+		}
+
+		var i int
+		var c rune
+		for i, c = range l {
+			if c == '=' {
+				break
+			}
+		}
+
+		if c != '=' {
+			log.Fatalf("Syntax error in file '%s' on line %d: Expected key=value pair; got: '%s'", filename, lineno, l)
+		}
+
+		k := strings.Trim(l[0:i], " \t\v\r\n")
+		v := strings.TrimLeft(l[i+1:], " \t\v\r\n")
+
+		er := flagSet.Set(k, v)
+		if er != nil {
+			log.Fatal(er)
+		}
+	}
+}
+
+// append a key value pair to the rc file
+func (w *WrenRC) Append(key string, value string) error {
+	f, err := os.OpenFile(w.rcFileDir, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	_, err = f.WriteString(fmt.Sprintf("%s=%s\n", key, value))
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (w *WrenRC) Read(key string) (string, error) {
+	return w.UserUUID, nil
+}