import (
"encoding/json"
- "fmt"
"os"
"os/user"
"path"
- "path/filepath"
- "regexp"
+
+ common "github.com/iotbzh/xds-common/golib"
)
type SyncThingConf struct {
}
type FileConfig struct {
- HTTPPort string `json:"httpPort"`
- SThgConf *SyncThingConf `json:"syncthing"`
+ HTTPPort string `json:"httpPort"`
+ LogsDir string `json:"logsDir"`
+ XDSAPIKey string `json:"xds-apikey"`
+ SThgConf *SyncThingConf `json:"syncthing"`
}
// getConfigFromFile reads configuration from a config file.
// Order to determine which config file is used:
// 1/ from command line option: "--config myConfig.json"
-// 2/ $HOME/.xds/agent-config.json file
-// 3/ <current_dir>/agent-config.json file
-// 4/ <executable dir>/agent-config.json file
+// 2/ $HOME/.xds/agent/agent-config.json file
+// 3/ /etc/xds-agent/config.json file
func updateConfigFromFile(c *Config, confFile string) (*FileConfig, error) {
searchIn = append(searchIn, confFile)
}
if usr, err := user.Current(); err == nil {
- searchIn = append(searchIn, path.Join(usr.HomeDir, ".xds", "agent-config.json"))
- }
- cwd, err := os.Getwd()
- if err == nil {
- searchIn = append(searchIn, path.Join(cwd, "agent-config.json"))
- }
- exePath, err := filepath.Abs(filepath.Dir(os.Args[0]))
- if err == nil {
- searchIn = append(searchIn, path.Join(exePath, "agent-config.json"))
+ searchIn = append(searchIn, path.Join(usr.HomeDir, ".xds", "agent", "agent-config.json"))
}
+ searchIn = append(searchIn, "/etc/xds-agent/config.json")
+
var cFile *string
for _, p := range searchIn {
if _, err := os.Stat(p); err == nil {
break
}
}
- fCfg := FileConfig{}
- if cFile == nil {
- // No config file found
- return &fCfg, nil
- }
+ // Use default settings
+ fCfg := *c.FileConf
- c.log.Infof("Use config file: %s", *cFile)
+ // Read config file when existing
+ if cFile != nil {
+ c.Log.Infof("Use config file: %s", *cFile)
- // TODO move on viper package to support comments in JSON and also
- // bind with flags (command line options)
- // see https://github.com/spf13/viper#working-with-flags
+ // TODO move on viper package to support comments in JSON and also
+ // bind with flags (command line options)
+ // see https://github.com/spf13/viper#working-with-flags
- fd, _ := os.Open(*cFile)
- defer fd.Close()
- if err := json.NewDecoder(fd).Decode(&fCfg); err != nil {
- return nil, err
+ fd, _ := os.Open(*cFile)
+ defer fd.Close()
+ if err := json.NewDecoder(fd).Decode(&fCfg); err != nil {
+ return nil, err
+ }
}
// Support environment variables (IOW ${MY_ENV_VAR} syntax) in agent-config.json
- // TODO: better to use reflect package to iterate on fields and be more generic
- var rep string
-
- if rep, err = resolveEnvVar(fCfg.SThgConf.BinDir); err != nil {
- return nil, err
+ vars := []*string{
+ &fCfg.LogsDir,
}
- fCfg.SThgConf.BinDir = path.Clean(rep)
-
- if rep, err = resolveEnvVar(fCfg.SThgConf.Home); err != nil {
- return nil, err
+ if fCfg.SThgConf != nil {
+ vars = append(vars, &fCfg.SThgConf.Home, &fCfg.SThgConf.BinDir)
}
- fCfg.SThgConf.Home = path.Clean(rep)
-
- return &fCfg, nil
-}
-
-// resolveEnvVar Resolved environment variable regarding the syntax ${MYVAR}
-func resolveEnvVar(s string) (string, error) {
- re := regexp.MustCompile("\\${(.*)}")
- vars := re.FindAllStringSubmatch(s, -1)
- res := s
- for _, v := range vars {
- val := os.Getenv(v[1])
- if val == "" {
- return res, fmt.Errorf("ERROR: %s env variable not defined", v[1])
+ for _, field := range vars {
+ var err error
+ *field, err = common.ResolveEnvVar(*field)
+ if err != nil {
+ return nil, err
}
-
- rer := regexp.MustCompile("\\${" + v[1] + "}")
- res = rer.ReplaceAllString(res, val)
}
- return res, nil
-}
-
-// exists returns whether the given file or directory exists or not
-func exists(path string) bool {
- _, err := os.Stat(path)
- if err == nil {
- return true
+ // Config file settings overwrite default config
+ if fCfg.HTTPPort != "" {
+ c.HTTPPort = fCfg.HTTPPort
}
- if os.IsNotExist(err) {
- return false
+
+ // Set default apikey
+ // FIXME - rework with dynamic key
+ if fCfg.XDSAPIKey == "" {
+ fCfg.XDSAPIKey = "1234abcezam"
}
- return true
+
+ return &fCfg, nil
}