Add --config flag

This re-enables config file support.

3 files changed, 25 insertions, 2 deletions

diff --git a/config.go b/config.go
index f97f2a3..0527294 100644
--- a/config.go
+++ b/config.go
@@ -4,12 +4,14 @@ import (
 	_ "embed"
 	"encoding/json"
 	"log"
+	"os"
 )
 
 //go:embed default_config.json
 var defaultConfig string
 
 type CeresConfig struct {
+	Path            string
 	HttpAddress     string `json:"http_address"`
 	StorageFilePath string `json:"storage_file_path"`
 }
@@ -22,3 +24,15 @@ func init() {
 		log.Fatal(err)
 	}
 }
+
+func (c *CeresConfig) Read() {
+	data, err := os.ReadFile(c.Path)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	err = json.Unmarshal(data, &c)
+	if err != nil {
+		log.Fatal(err)
+	}
+}
diff --git a/flags.go b/flags.go
index 862cffa..708e832 100644
--- a/flags.go
+++ b/flags.go
@@ -7,17 +7,22 @@ import (
 
 const help = `Ceres - Recipe server for local networks
 
-Usage: ceres [-h | --help] [-v | --version]
+Usage: ceres [-h | --help] [-v | --version] [-c | --config]
 
   -h, --help                 show this help page and exit
   -v, --version              print version information
+  -c, --config               file path to configuration file
 `
 
 var printVersion bool
 
 func init() {
 	flag.BoolVar(&printVersion, "version", false, "print version information")
-	flag.BoolVar(&printVersion, "v", false, "print version information")
+	flag.BoolVar(&printVersion, "v",       false, "print version information")
+
+	flag.StringVar(&config.Path, "config", "", "file path to configuration file")
+	flag.StringVar(&config.Path, "c",      "", "file path to configuration file")
+
 	flag.Usage = func() {
 		fmt.Fprintf(flag.CommandLine.Output(), help)
 	}
diff --git a/main.go b/main.go
index d43edd2..4a45586 100644
--- a/main.go
+++ b/main.go
@@ -21,6 +21,10 @@ import (
 func main() {
 	flag.Parse()
 
+	if config.Path != "" {
+		config.Read()
+	}
+
 	if printVersion {
 		if gitDescribe == "" {
 			log.Fatal("This build has no version information")