[config] Deprecated v1

- the original aim of config package is to support template inside YAML,
kind of like what Ansible is doing, it was invented for Xephon-B.
We first use a non standard template engine (I even forgot its name
now), and then switched to using standard library's `text/template`,
this syntax is a bit awkward when for loop is used, it's ok when using
things like `{{env KEY_NAME}}`
- however, when not writing bechmark config, the template feature is not
that useful, normally I just unmarshal the yaml to struct and that's it
- I am not sure what v2 of config would be, maybe support more format or
enforce the struct/interface of config struct. (It used to have a
validation interface that check the config and its fields manually)
or just allow downloading config file from the wire

Makefile

@@ -1,5 +1,5 @@
-PKGS=./config/... ./errors/... ./generator/... ./log/... ./noodle/... ./requests/... ./structure/... ./util/...
-PKGST=./cmd ./config ./errors ./generator ./log ./noodle ./requests ./structure ./util
+PKGS=./errors/... ./generator/... ./log/... ./noodle/... ./requests/... ./structure/... ./util/...
+PKGST=./cmd ./errors ./generator ./log ./noodle ./requests ./structure ./util
 VERSION = 0.0.1
 BUILD_COMMIT = $(shell git rev-parse HEAD)
 BUILD_TIME = $(shell date +%Y-%m-%dT%H:%M:%S%z)

generator/generate.go

@@ -4,8 +4,10 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"io/ioutil"
+
+	"gopkg.in/yaml.v2"
 
-	"github.com/dyweb/gommon/config"
 	"github.com/dyweb/gommon/errors"
 	"github.com/dyweb/gommon/util/fsutil"
 )
@@ -37,10 +39,13 @@ func GenerateSingle(file string) error {
 	segments := strings.Split(dir, string(os.PathSeparator))
 	pkg := segments[len(segments)-1]
 	cfg := NewConfig(pkg, file)
-	// TODO: config may remove LoadYAMLAsStruct in the future
-	if err = config.LoadYAMLAsStruct(file, &cfg); err != nil {
+	b, err := ioutil.ReadFile(file)
+	if err != nil {
 		return errors.Wrap(err, "can't read config file")
 	}
+	if err = yaml.Unmarshal(b, &cfg); err != nil {
+		return errors.Wrap(err, "can't decode config file as YAML")
+	}
 
 	// gommon logger
 	if rendered, err = cfg.RenderGommon(); err != nil {