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first commit

master
andrey1s 2 years ago
commit
913ca9672d
  1. 26
      .drone.yml
  2. 17
      .gitignore
  3. 46
      .golangci.yml
  4. 19
      LICENSE
  5. 5
      README.md
  6. 96
      client.go
  7. 198
      client_example_test.go
  8. 17
      docker-compose.yml
  9. 8
      error.go
  10. 15
      go.mod
  11. 317
      go.sum
  12. 15
      key.go
  13. 32
      key/helpers.go
  14. 64
      key/helpers_test.go
  15. 46
      key/key.go
  16. 19
      provider.go
  17. 136
      provider/arg/provider.go
  18. 48
      provider/arg/provider_test.go
  19. 61
      provider/env/provider.go
  20. 24
      provider/env/provider_test.go
  21. 113
      provider/etcd/provider.go
  22. 119
      provider/etcd/provider_test.go
  23. 62
      provider/ini/provider.go
  24. 28
      provider/ini/provider_test.go
  25. 66
      provider/json/provider.go
  26. 27
      provider/json/provider_test.go
  27. 71
      provider/toml/provider.go
  28. 29
      provider/toml/provider_test.go
  29. 41
      provider/toml/value.go
  30. 90
      provider/vault/secret.go
  31. 26
      provider/vault/secret_test.go
  32. 71
      provider/watcher/provider.go
  33. 58
      provider/watcher/provider_test.go
  34. 57
      provider/yaml/file.go
  35. 88
      provider/yaml/provider.go
  36. 26
      provider/yaml/provider_test.go
  37. 46
      test/etcd.go
  38. 1038
      test/fixture/config.ini
  39. 16
      test/fixture/config.json
  40. 31
      test/fixture/config.toml
  41. 12
      test/fixture/config.yaml
  42. 17
      test/helpers.go
  43. 16
      test/ini.go
  44. 15
      test/json.go
  45. 150
      test/provider_suite.go
  46. 89
      test/vault.go
  47. 39
      value.go
  48. 109
      value/decode.go
  49. 85
      value/empty.go
  50. 81
      value/helpers.go
  51. 112
      value/jbytes.go
  52. 112
      value/jstring.go
  53. 37
      value/jstring_test.go
  54. 158
      value/value.go
  55. 11
      variable.go

26
.drone.yml

@ -0,0 +1,26 @@
kind: pipeline
name: default
services:
- name: vault
image: vault
environment:
VAULT_DEV_ROOT_TOKEN_ID: dev
- name: etcd
image: bitnami/etcd
environment:
VAULT_DEV_LISTEN_ADDRESS: vault:8200
VAULT_DEV_ROOT_TOKEN_ID: dev
FDEVS_CONFIG_ETCD_HOST: etcd:2379
steps:
- name: test
image: golang
commands:
- go test -parallel 10 -race ./...
- name: golangci-lint
image: golangci/golangci-lint:v1.39
commands:
- golangci-lint run

17
.gitignore

@ -0,0 +1,17 @@
# ---> Go
# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib
# Test binary, built with `go test -c`
*.test
# Output of the go coverage tool, specifically when used with LiteIDE
*.out
# Dependency directories (remove the comment below to include it)
# vendor/

46
.golangci.yml

@ -0,0 +1,46 @@
run:
timeout: 5m
linters-settings:
dupl:
threshold: 100
funlen:
lines: 100
statements: 50
goconst:
min-len: 2
min-occurrences: 2
gocyclo:
min-complexity: 15
golint:
min-confidence: 0
govet:
check-shadowing: true
lll:
line-length: 140
maligned:
suggest-new: true
misspell:
locale: US
linters:
enable-all: true
disable:
- exhaustivestruct
- maligned
- interfacer
- scopelint
issues:
# Excluding configuration per-path, per-linter, per-text and per-source
exclude-rules:
- path: _test\.go
linters:
- gomnd
- exhaustivestruct
- wrapcheck
- path: test/*
linters:
- gomnd
- exhaustivestruct
- wrapcheck

19
LICENSE

@ -0,0 +1,19 @@
MIT License Copyright (c) 2020 4devs
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is furnished
to do so, subject to the following conditions:
The above copyright notice and this permission notice (including the next
paragraph) shall be included in all copies or substantial portions of the
Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

5
README.md

@ -0,0 +1,5 @@
# config
[![Build Status](https://drone.gitoa.ru/api/badges/go-4devs/cache/status.svg)](https://drone.gitoa.ru/go-4devs/config)
[![Go Report Card](https://goreportcard.com/badge/gitoa.ru/go-4devs/config)](https://goreportcard.com/report/gitoa.ru/go-4devs/config)
[![GoDoc](https://godoc.org/gitoa.ru/go-4devs/config?status.svg)](http://godoc.org/gitoa.ru/go-4devs/config)

96
client.go

@ -0,0 +1,96 @@
package config
import (
"context"
"errors"
"fmt"
)
func New(namespace, appName string, providers []Provider) *Client {
return &Client{
namespace: namespace,
appName: appName,
providers: providers,
}
}
type Client struct {
providers []Provider
appName string
namespace string
}
func (c *Client) key(name string) Key {
return Key{
Name: name,
AppName: c.appName,
Namespace: c.namespace,
}
}
func (c *Client) Value(ctx context.Context, name string) (Value, error) {
variable, err := c.Variable(ctx, name)
if err != nil {
return nil, err
}
return variable.Value, nil
}
func (c *Client) Variable(ctx context.Context, name string) (Variable, error) {
var (
variable Variable
err error
)
key := c.key(name)
for _, provider := range c.providers {
variable, err = provider.Read(ctx, key)
if err == nil || !errors.Is(err, ErrVariableNotFound) {
break
}
}
if err != nil {
return variable, fmt.Errorf("client failed get variable: %w", err)
}
return variable, nil
}
func NewWatch(namespace, appName string, providers []Provider) *WatchClient {
cl := WatchClient{
Client: New(namespace, appName, providers),
}
for _, provider := range providers {
if watch, ok := provider.(WatchProvider); ok {
cl.providers = append(cl.providers, watch)
}
}
return &cl
}
type WatchClient struct {
*Client
providers []WatchProvider
}
func (wc *WatchClient) Watch(ctx context.Context, name string, callback WatchCallback) error {
key := wc.key(name)
for _, provider := range wc.providers {
err := provider.Watch(ctx, key, callback)
if err != nil {
if errors.Is(err, ErrVariableNotFound) {
continue
}
return fmt.Errorf("client: failed watch by provider %s: %w", provider.Name(), err)
}
}
return nil
}

198
client_example_test.go

@ -0,0 +1,198 @@
package config_test
import (
"context"
"fmt"
"log"
"os"
"sync"
"time"
"gitoa.ru/go-4devs/config"
"gitoa.ru/go-4devs/config/provider/arg"
"gitoa.ru/go-4devs/config/provider/env"
"gitoa.ru/go-4devs/config/provider/etcd"
"gitoa.ru/go-4devs/config/provider/json"
"gitoa.ru/go-4devs/config/provider/vault"
"gitoa.ru/go-4devs/config/provider/watcher"
"gitoa.ru/go-4devs/config/provider/yaml"
"gitoa.ru/go-4devs/config/test"
)
func ExampleNew() {
ctx := context.Background()
_ = os.Setenv("FDEVS_CONFIG_LISTEN", "8080")
_ = os.Setenv("FDEVS_CONFIG_HOST", "localhost")
args := os.Args
defer func() {
os.Args = args
}()
os.Args = []string{"main.go", "--host=gitoa.ru"}
// configure etcd client
etcdClient, err := test.NewEtcd(ctx)
if err != nil {
log.Print(err)
return
}
// configure vault client
vaultClient, err := test.NewVault()
if err != nil {
log.Print(err)
return
}
// read json config
jsonConfig := test.ReadFile("config.json")
providers := []config.Provider{
arg.New(),
env.New(),
etcd.NewProvider(etcdClient),
vault.NewSecretKV2(vaultClient),
json.New(jsonConfig),
}
config := config.New(test.Namespace, test.AppName, providers)
dsn, err := config.Value(ctx, "example:dsn")
if err != nil {
log.Print(err)
return
}
port, err := config.Value(ctx, "listen")
if err != nil {
log.Print(err)
return
}
enabled, err := config.Value(ctx, "maintain")
if err != nil {
log.Print(err)
return
}
title, err := config.Value(ctx, "app.name.title")
if err != nil {
log.Print(err)
return
}
cfgValue, err := config.Value(ctx, "cfg")
if err != nil {
log.Print(err)
return
}
hostValue, err := config.Value(ctx, "host")
if err != nil {
log.Print(err)
return
}
cfg := test.Config{}
_ = cfgValue.Unmarshal(&cfg)
fmt.Printf("dsn from vault: %s\n", dsn.String())
fmt.Printf("listen from env: %d\n", port.Int())
fmt.Printf("maintain from etcd: %v\n", enabled.Bool())
fmt.Printf("title from json: %v\n", title.String())
fmt.Printf("struct from json: %+v\n", cfg)
fmt.Printf("replace env host by args: %v\n", hostValue.String())
// Output:
// dsn from vault: pgsql://user@pass:127.0.0.1:5432
// listen from env: 8080
// maintain from etcd: true
// title from json: config title
// struct from json: {Duration:21m0s Enabled:true}
// replace env host by args: gitoa.ru
}
func ExampleNewWatch() {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
// configure etcd client
etcdClient, err := test.NewEtcd(ctx)
if err != nil {
log.Print(err)
return
}
_ = os.Setenv("FDEVS_CONFIG_EXAMPLE_ENABLE", "true")
_, err = etcdClient.KV.Put(ctx, "fdevs/config/example_db_dsn", "pgsql://user@pass:127.0.0.1:5432")
if err != nil {
log.Print(err)
return
}
defer func() {
cancel()
if _, err = etcdClient.KV.Delete(context.Background(), "fdevs/config/example_db_dsn"); err != nil {
log.Print(err)
return
}
}()
providers := []config.Provider{
watcher.New(time.Microsecond, env.New()),
watcher.New(time.Microsecond, yaml.NewFile("test/fixture/config.yaml")),
etcd.NewProvider(etcdClient),
}
watcher := config.NewWatch(test.Namespace, test.AppName, providers)
wg := sync.WaitGroup{}
wg.Add(2)
err = watcher.Watch(ctx, "example_enable", func(ctx context.Context, oldVar, newVar config.Variable) {
fmt.Println("update ", oldVar.Provider, " variable:", oldVar.Name, ", old: ", oldVar.Value.Bool(), " new:", newVar.Value.Bool())
wg.Done()
})
if err != nil {
log.Print(err)
return
}
_ = os.Setenv("FDEVS_CONFIG_EXAMPLE_ENABLE", "false")
err = watcher.Watch(ctx, "example_db_dsn", func(ctx context.Context, oldVar, newVar config.Variable) {
fmt.Println("update ", oldVar.Provider, " variable:", oldVar.Name, ", old: ", oldVar.Value.String(), " new:", newVar.Value.String())
wg.Done()
})
if err != nil {
log.Print(err)
return
}
time.AfterFunc(time.Second, func() {
if _, err := etcdClient.KV.Put(ctx, "fdevs/config/example_db_dsn", "mysql://localhost:5432"); err != nil {
log.Print(err)
return
}
})
wg.Wait()
// Output:
// update env variable: FDEVS_CONFIG_EXAMPLE_ENABLE , old: true new: false
// update etcd variable: fdevs/config/example_db_dsn , old: pgsql://user@pass:127.0.0.1:5432 new: mysql://localhost:5432
}

17
docker-compose.yml

@ -0,0 +1,17 @@
version: '3'
services:
vault:
image: vault:latest
cap_add:
- IPC_LOCK
ports:
- "8200:8200"
environment:
VAULT_DEV_ROOT_TOKEN_ID: "dev"
etcd:
image: bitnami/etcd
environment:
ALLOW_NONE_AUTHENTICATION: "yes"
ports:
- "2379:2379"

8
error.go

@ -0,0 +1,8 @@
package config
import "errors"
var (
ErrVariableNotFound = errors.New("variable not found")
ErrInvalidValue = errors.New("invalid value")
)

15
go.mod

@ -0,0 +1,15 @@
module gitoa.ru/go-4devs/config
go 1.16
require (
github.com/hashicorp/vault/api v1.1.0
github.com/pelletier/go-toml v1.9.0
github.com/smartystreets/goconvey v1.6.4 // indirect
github.com/stretchr/testify v1.7.0
github.com/tidwall/gjson v1.7.5
go.etcd.io/etcd/api/v3 v3.5.0-alpha.0
go.etcd.io/etcd/client/v3 v3.5.0-alpha.0
gopkg.in/ini.v1 v1.62.0
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
)

317
go.sum

@ -0,0 +1,317 @@
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/DataDog/datadog-go v3.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
github.com/armon/go-metrics v0.3.0/go.mod h1:zXjbSimjXTd7vOpY8B0/2LpvNvDoXBuplAD+gJD3GYs=
github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
github.com/aws/aws-sdk-go v1.25.37/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible/go.mod h1:nmEj6Dob7S7YxXgwXpfOuvO54S+tGdZdw9fuRZt25Ag=
github.com/circonus-labs/circonusllhist v0.1.3/go.mod h1:kMXHVDlOchFAehlya5ePtbp5jckzBHf4XRpQvBOLI+I=
github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=
github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
github.com/coreos/go-systemd/v22 v22.1.0 h1:kq/SbG2BCKLkDKkjQf5OWwKWUKj1lgs3lFI4PxnR5lg=
github.com/coreos/go-systemd/v22 v22.1.0/go.mod h1:xO0FLkIi5MaZafQlIrOotqXZ90ih+1atmu1JpKERPPk=
github.com/creack/pty v1.1.11/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
github.com/fatih/structs v1.1.0/go.mod h1:9NiDSp5zOcgEDl+j00MP/WkGVPOlPRLejGD8Ga6PJ7M=
github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
github.com/go-asn1-ber/asn1-ber v1.3.1/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
github.com/go-ldap/ldap/v3 v3.1.3/go.mod h1:3rbOH3jRS2u6jg2rJnKAMLE/xQyCKIveG2Sa/Cohzb8=
github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
github.com/go-test/deep v1.0.2-0.20181118220953-042da051cf31/go.mod h1:wGDj63lr65AM2AQyKZd/NYHGb0R+1RLqB8NKt3aSFNA=
github.com/go-test/deep v1.0.2 h1:onZX1rnHT3Wv6cqNgYyFOOlgVKJrksuCMCRvJStbMYw=
github.com/go-test/deep v1.0.2/go.mod h1:wGDj63lr65AM2AQyKZd/NYHGb0R+1RLqB8NKt3aSFNA=
github.com/godbus/dbus/v5 v5.0.3/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
github.com/gogo/protobuf v1.3.1 h1:DqDEcV5aeaTmdFBePNpYsp3FlcVH/2ISVVM9Qf8PSls=
github.com/gogo/protobuf v1.3.1/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
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gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.1-2019.2.3 h1:3JgtbtFHMiCmsznwGVTUWbgGov+pVqnlf1dEJTNAXeM=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=

15
key.go

@ -0,0 +1,15 @@
package config
import "context"
type Key struct {
Name string
AppName string
Namespace string
}
type KeyFactory func(ctx context.Context, key Key) string
func (k Key) String() string {
return k.Namespace + "_" + k.AppName + "_" + k.Name
}

32
key/helpers.go

@ -0,0 +1,32 @@
package key
import (
"context"
"strings"
"gitoa.ru/go-4devs/config"
)
func LastIndex(sep string, factory config.KeyFactory) func(ctx context.Context, key config.Key) (string, string) {
return func(ctx context.Context, key config.Key) (string, string) {
k := factory(ctx, key)
idx := strings.LastIndex(k, sep)
if idx == -1 {
return k, ""
}
return k[0:idx], k[idx+len(sep):]
}
}
func LastIndexField(sep, def string, factory config.KeyFactory) func(ctx context.Context, key config.Key) (string, string) {
return func(ctx context.Context, key config.Key) (string, string) {
p, k := LastIndex(sep, factory)(ctx, key)
if k == "" {
return p, def
}
return p, k
}
}

64
key/helpers_test.go

@ -0,0 +1,64 @@
package key_test
import (
"context"
"testing"
"github.com/stretchr/testify/assert"
"gitoa.ru/go-4devs/config"
"gitoa.ru/go-4devs/config/key"
)
func TestLastIndex(t *testing.T) {
t.Parallel()
ctx := context.Background()
cases := map[string]struct {
sep string
path string
field string
}{
"/secret/with/field/name": {
sep: "/",
path: "/secret/with/field",
field: "name",
},
"/secret/database:username": {
sep: ":",
path: "/secret/database",
field: "username",
},
"database:username": {
sep: ":",
path: "database",
field: "username",
},
"/secret/database-dsn": {
sep: ":",
path: "/secret/database-dsn",
field: "",
},
"/secret/database--dsn": {
sep: "--",
path: "/secret/database",
field: "dsn",
},
"/secret/database:dsn": {
sep: "--",
path: "/secret/database:dsn",
field: "",
},
}
for path, data := range cases {
k := config.Key{
Name: path,
}
fn := key.LastIndex(data.sep, key.Name)
ns, field := fn(ctx, k)
assert.Equal(t, data.field, field, k)
assert.Equal(t, data.path, ns, k)
}
}

46
key/key.go

@ -0,0 +1,46 @@
package key
import (
"context"
"strings"
"gitoa.ru/go-4devs/config"
)
func NsAppName(sep string) config.KeyFactory {
return func(_ context.Context, key config.Key) string {
return strings.Join([]string{key.Namespace, key.AppName, key.Name}, sep)
}
}
func AppName(sep string) config.KeyFactory {
return func(_ context.Context, key config.Key) string {
return strings.Join([]string{key.AppName, key.Name}, sep)
}
}
func PrefixName(prefix string, factory config.KeyFactory) config.KeyFactory {
return func(ctx context.Context, key config.Key) string {
return prefix + factory(ctx, key)
}
}
func Name(_ context.Context, key config.Key) string {
return key.Name
}
func AliasName(name string, alias string, def config.KeyFactory) config.KeyFactory {
return func(ctx context.Context, key config.Key) string {
if name == key.Name {
return alias
}
return def(ctx, key)
}
}
func ReplaceAll(oldVal, newVal string, parent config.KeyFactory) config.KeyFactory {
return func(ctx context.Context, key config.Key) string {
return strings.ReplaceAll(parent(ctx, key), oldVal, newVal)
}
}

19
provider.go

@ -0,0 +1,19 @@
package config
import "context"
type Provider interface {
Read(ctx context.Context, key Key) (Variable, error)
NamedProvider
}
type WatchCallback func(ctx context.Context, oldVar, newVar Variable)
type WatchProvider interface {
Watch(ctx context.Context, key Key, callback WatchCallback) error
NamedProvider
}
type NamedProvider interface {
Name() string
}

136
provider/arg/provider.go

@ -0,0 +1,136 @@
package arg
import (
"context"
"fmt"
"os"
"strings"
"gitoa.ru/go-4devs/config"
"gitoa.ru/go-4devs/config/key"
"gitoa.ru/go-4devs/config/value"
"gopkg.in/yaml.v3"
)
var _ config.Provider = (*Provider)(nil)
type Option func(*Provider)
func WithKeyFactory(factory config.KeyFactory) Option {
return func(p *Provider) { p.key = factory }
}
func New(opts ...Option) *Provider {
p := Provider{
key: key.Name,
}
for _, opt := range opts {
opt(&p)
}
return &p
}
type Provider struct {
args map[string][]string
key config.KeyFactory
}
// nolint: cyclop
func (p *Provider) parseOne(arg string) (name, val string, err error) {
if arg[0] != '-' {
return
}
numMinuses := 1
if arg[1] == '-' {
numMinuses++
}
name = strings.TrimSpace(arg[numMinuses:])
if len(name) == 0 {
return
}
if name[0] == '-' || name[0] == '=' {
return "", "", fmt.Errorf("%w: bad flag syntax: %s", config.ErrInvalidValue, arg)
}
for i := 1; i < len(name); i++ {
if name[i] == '=' || name[i] == ' ' {
val = strings.TrimSpace(name[i+1:])
name = name[0:i]
break
}
}
if val == "" && numMinuses == 1 && len(arg) > 2 {
name, val = name[:1], name[1:]
}
return name, val, nil
}
func (p *Provider) parse() error {
if len(p.args) > 0 {
return nil
}
p.args = make(map[string][]string, len(os.Args[1:]))
for _, arg := range os.Args[1:] {
name, value, err := p.parseOne(arg)
if err != nil {
return err
}
if name != "" {
p.args[name] = append(p.args[name], value)
}
}
return nil
}
func (p *Provider) Name() string {
return "arg"
}
func (p *Provider) IsSupport(ctx context.Context, key config.Key) bool {
return p.key(ctx, key) != ""
}
func (p *Provider) Read(ctx context.Context, key config.Key) (config.Variable, error) {
if err := p.parse(); err != nil {
return config.Variable{Provider: p.Name()}, err
}
k := p.key(ctx, key)
if val, ok := p.args[k]; ok {
switch {
case len(val) == 1:
return config.Variable{
Name: k,
Provider: p.Name(),
Value: value.JString(val[0]),
}, nil
default:
var n yaml.Node
if err := yaml.Unmarshal([]byte("["+strings.Join(val, ",")+"]"), &n); err != nil {
return config.Variable{}, fmt.Errorf("arg: failed unmarshal yaml:%w", err)
}
return config.Variable{
Name: k,
Provider: p.Name(),
Value: value.Decode(n.Decode),
}, nil
}
}
return config.Variable{Name: k, Provider: p.Name()}, config.ErrVariableNotFound
}

48
provider/arg/provider_test.go

@ -0,0 +1,48 @@
package arg_test
import (
"os"
"testing"
"time"
"gitoa.ru/go-4devs/config/provider/arg"
"gitoa.ru/go-4devs/config/test"
)
func TestProvider(t *testing.T) {
t.Parallel()
args := os.Args
defer func() {
os.Args = args
}()
os.Args = []string{
"main.go",
"--listen=8080",
"--config=config.hcl",
"--url=http://4devs.io",
"--url=https://4devs.io",
"--timeout=1m",
"--timeout=1h",
"--start-at=2010-01-02T15:04:05Z",
"--end-after=2009-01-02T15:04:05Z",
"--end-after=2008-01-02T15:04:05+03:00",
}
read := []test.Read{
test.NewRead("listen", 8080),
test.NewRead("config", "config.hcl"),
test.NewRead("start-at", test.Time("2010-01-02T15:04:05Z")),
test.NewReadUnmarshal("url", &[]string{"http://4devs.io", "https://4devs.io"}, &[]string{}),
test.NewReadUnmarshal("timeout", &[]time.Duration{time.Minute, time.Hour}, &[]time.Duration{}),
test.NewReadUnmarshal("end-after", &[]time.Time{
test.Time("2009-01-02T15:04:05Z"),
test.Time("2008-01-02T15:04:05+03:00"),
}, &[]time.Time{}),
}
prov := arg.New()
test.Run(t, prov, read)
}

61
provider/env/provider.go

@ -0,0 +1,61 @@
package env
import (
"context"
"os"
"strings"
"gitoa.ru/go-4devs/config"
"gitoa.ru/go-4devs/config/key"
"gitoa.ru/go-4devs/config/value"
)
var _ config.Provider = (*Provider)(nil)
type Option func(*Provider)
func WithKeyFactory(factory config.KeyFactory) Option {
return func(p *Provider) { p.key = factory }
}
func New(opts ...Option) *Provider {
p := Provider{
key: func(ctx context.Context, k config.Key) string {
return strings.ToUpper(key.NsAppName("_")(ctx, k))
},
}
for _, opt := range opts {
opt(&p)
}
return &p
}
type Provider struct {
key config.KeyFactory
}
func (p *Provider) Name() string {
return "env"
}
func (p *Provider) IsSupport(ctx context.Context, key config.Key) bool {
return p.key(ctx, key) != ""
}
func (p *Provider) Read(ctx context.Context, key config.Key) (config.Variable, error) {
k := p.key(ctx, key)
if val, ok := os.LookupEnv(k); ok {
return config.Variable{
Name: k,
Provider: p.Name(),
Value: value.JString(val),
}, nil
}
return config.Variable{
Name: k,
Provider: p.Name(),
}, config.ErrVariableNotFound
}

24
provider/env/provider_test.go

@ -0,0 +1,24 @@
package env_test
import (
"os"
"testing"
"gitoa.ru/go-4devs/config/provider/env"
"gitoa.ru/go-4devs/config/test"
)
func TestProvider(t *testing.T) {
t.Parallel()
os.Setenv("FDEVS_CONFIG_DSN", test.DSN)
os.Setenv("FDEVS_CONFIG_PORT", "8080")
provider := env.New()
read := []test.Read{
test.NewRead("dsn", test.DSN),
test.NewRead("port", 8080),
}
test.Run(t, provider, read)
}

113
provider/etcd/provider.go

@ -0,0 +1,113 @@
package etcd
import (
"context"
"fmt"
"log"
"gitoa.ru/go-4devs/config"
"gitoa.ru/go-4devs/config/key"
"gitoa.ru/go-4devs/config/value"
pb "go.etcd.io/etcd/api/v3/mvccpb"
client "go.etcd.io/etcd/client/v3"
)
var (
_ config.Provider = (*Provider)(nil)
_ config.WatchProvider = (*Provider)(nil)
)
type Client interface {
client.KV
client.Watcher
}
func NewProvider(client Client) *Provider {
p := Provider{
client: client,
key: key.NsAppName("/"),
}
return &p
}
type Provider struct {
client Client
key config.KeyFactory
}
func (p *Provider) IsSupport(ctx context.Context, key config.Key) bool {
return p.key(ctx, key) != ""
}
func (p *Provider) Name() string {
return "etcd"
}
func (p *Provider) Read(ctx context.Context, key config.Key) (config.Variable, error) {
k := p.key(ctx, key)
resp, err := p.client.Get(ctx, k, client.WithPrefix())
if err != nil {
return config.Variable{}, fmt.Errorf("%w: key:%s, prov:%s", err, k, p.Name())
}
val, err := p.resolve(k, resp.Kvs)
if err != nil {
return config.Variable{}, fmt.Errorf("%w: key:%s, prov:%s", err, k, p.Name())
}
return val, nil
}
func (p *Provider) Watch(ctx context.Context, key config.Key, callback config.WatchCallback) error {
go func(ctx context.Context, key string, callback config.WatchCallback) {
watch := p.client.Watch(ctx, key, client.WithPrevKV(), client.WithPrefix())
for w := range watch {
kvs, olds := p.getEventKvs(w.Events)
if len(kvs) > 0 {
newVar, _ := p.resolve(key, kvs)
oldVar, _ := p.resolve(key, olds)
callback(ctx, oldVar, newVar)
}
}
}(ctx, p.key(ctx, key), callback)
return nil
}
func (p *Provider) getEventKvs(events []*client.Event) ([]*pb.KeyValue, []*pb.KeyValue) {
kvs := make([]*pb.KeyValue, 0, len(events))
old := make([]*pb.KeyValue, 0, len(events))
for i := range events {
kvs = append(kvs, events[i].Kv)
old = append(old, events[i].PrevKv)
log.Println(events[i].Type)
}
return kvs, old
}
func (p *Provider) resolve(key string, kvs []*pb.KeyValue) (config.Variable, error) {
for _, kv := range kvs {
switch {
case kv == nil:
return config.Variable{
Name: key,
Provider: p.Name(),
}, nil
case string(kv.Key) == key:
return config.Variable{
Value: value.JBytes(kv.Value),
Name: key,
Provider: p.Name(),
}, nil
}
}
return config.Variable{
Name: key,
Provider: p.Name(),
}, config.ErrVariableNotFound
}

119
provider/etcd/provider_test.go

@ -0,0 +1,119 @@
package etcd_test
import (
"context"
"fmt"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"gitoa.ru/go-4devs/config"
"gitoa.ru/go-4devs/config/provider/etcd"
"gitoa.ru/go-4devs/config/test"
)
func TestProvider(t *testing.T) {
t.Parallel()
ctx := context.Background()
et, err := test.NewEtcd(ctx)
require.NoError(t, err)
provider := etcd.NewProvider(et)
read := []test.Read{
test.NewRead("db_dsn", test.DSN),
test.NewRead("duration", 12*time.Minute),
test.NewRead("port", 8080),
test.NewRead("maintain", true),
test.NewRead("start_at", test.Time("2020-01-02T15:04:05Z")),
test.NewRead("percent", .064),
test.NewRead("count", uint(2020)),
test.NewRead("int64", int64(2021)),
test.NewRead("uint64", int64(2022)),
test.NewReadConfig("config"),
}
test.Run(t, provider, read)
}
func value(cnt int32) string {
return fmt.Sprintf("test data: %d", cnt)
}
func TestWatcher(t *testing.T) {
t.Parallel()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
key := config.Key{
AppName: "config",
Namespace: "fdevs",
Name: "test_watch",
}
et, err := test.NewEtcd(ctx)
require.NoError(t, err)
defer func() {
_, err = et.KV.Delete(context.Background(), "fdevs/config/test_watch")
require.NoError(t, err)
}()
var cnt, cnt2 int32
prov := etcd.NewProvider(et)
wg := sync.WaitGroup{}
wg.Add(6)
watch := func(cnt *int32) func(ctx context.Context, oldVar, newVar config.Variable) {
return func(ctx context.Context, oldVar, newVar config.Variable) {
switch *cnt {
case 0:
assert.Equal(t, value(*cnt), newVar.Value.String())
assert.Nil(t, oldVar.Value)
case 1:
assert.Equal(t, value(*cnt), newVar.Value.String())
assert.Equal(t, value(*cnt-1), oldVar.Value.String())
case 2:
_, perr := newVar.Value.ParseString()
assert.NoError(t, perr)
assert.Equal(t, "", newVar.Value.String())
assert.Equal(t, value(*cnt-1), oldVar.Value.String())
default:
assert.Fail(t, "unexpected watch")
}
wg.Done()
atomic.AddInt32(cnt, 1)
}
}
err = prov.Watch(ctx, key, watch(&cnt))
err = prov.Watch(ctx, key, watch(&cnt2))
require.NoError(t, err)
time.AfterFunc(time.Second, func() {
_, err = et.KV.Put(ctx, "fdevs/config/test_watch", value(0))
require.NoError(t, err)
_, err = et.KV.Put(ctx, "fdevs/config/test_watch", value(1))
require.NoError(t, err)
_, err = et.KV.Delete(ctx, "fdevs/config/test_watch")
require.NoError(t, err)
})
time.AfterFunc(time.Second*10, func() {
assert.Fail(t, "failed watch after 5 sec")
cancel()
})
go func() {
wg.Wait()
cancel()
}()
<-ctx.Done()
}

62
provider/ini/provider.go

@ -0,0 +1,62 @@
package ini
import (
"context"
"fmt"
"strings"
"gitoa.ru/go-4devs/config"
"gitoa.ru/go-4devs/config/value"
"gopkg.in/ini.v1"
)
var _ config.Provider = (*Provider)(nil)
func New(data *ini.File) *Provider {
return &Provider{
data: data,
resolve: func(ctx context.Context, key config.Key) (string, string) {
keys := strings.SplitN(key.Name, "/", 2)
if len(keys) == 1 {
return "", keys[0]
}
return keys[0], keys[1]
},
}
}
type Provider struct {
data *ini.File
resolve func(ctx context.Context, key config.Key) (string, string)
}
func (p *Provider) IsSupport(ctx context.Context, key config.Key) bool {
section, name := p.resolve(ctx, key)
return section != "" && name != ""
}
func (p *Provider) Name() string {
return "ini"
}
func (p *Provider) Read(ctx context.Context, key config.Key) (config.Variable, error) {
section, name := p.resolve(ctx, key)
iniSection, err := p.data.GetSection(section)
if err != nil {
return config.Variable{}, fmt.Errorf("%w: %s: %v", config.ErrVariableNotFound, p.Name(), err)
}
iniKey, err := iniSection.GetKey(name)
if err != nil {
return config.Variable{}, fmt.Errorf("%w: %s: %v", config.ErrVariableNotFound, p.Name(), err)
}
return config.Variable{
Name: section + ":" + name,
Provider: p.Name(),
Value: value.JString(iniKey.String()),
}, nil
}

28
provider/ini/provider_test.go

@ -0,0 +1,28 @@
package ini_test
import (
"testing"
"time"
"gitoa.ru/go-4devs/config/provider/ini"
"gitoa.ru/go-4devs/config/test"
)
func TestProvider(t *testing.T) {
t.Parallel()
file := test.NewINI()
read := []test.Read{
test.NewRead("project/PROJECT_BOARD_BASIC_KANBAN_TYPE", "To Do, In Progress, Done"),
test.NewRead("repository.editor/PREVIEWABLE_FILE_MODES", "markdown"),
test.NewRead("server/LOCAL_ROOT_URL", "http://0.0.0.0:3000/"),
test.NewRead("server/LFS_HTTP_AUTH_EXPIRY", 20*time.Minute),
test.NewRead("repository.pull-request/DEFAULT_MERGE_MESSAGE_SIZE", 5120),
test.NewRead("ui/SHOW_USER_EMAIL", true),
test.NewRead("cors/ENABLED", false),
}
prov := ini.New(file)
test.Run(t, prov, read)
}

66
provider/json/provider.go

@ -0,0 +1,66 @@
package json
import (
"context"
"fmt"
"io/ioutil"
"path/filepath"
"github.com/tidwall/gjson"
"gitoa.ru/go-4devs/config"
"gitoa.ru/go-4devs/config/key"
"gitoa.ru/go-4devs/config/value"
)
var _ config.Provider = (*Provider)(nil)
func New(json []byte, opts ...Option) *Provider {
provider := Provider{
key: key.Name,
data: json,
}
for _, opt := range opts {
opt(&provider)
}
return &provider
}
func NewFile(path string, opts ...Option) (*Provider, error) {
file, err := ioutil.ReadFile(filepath.Clean(path))
if err != nil {
return nil, fmt.Errorf("%w: unable to read config file %#q: file not found or unreadable", err, path)
}
return New(file), nil
}
type Option func(*Provider)
type Provider struct {
data []byte
key config.KeyFactory
}
func (p *Provider) IsSupport(ctx context.Context, key config.Key) bool {
return p.key(ctx, key) != ""
}
func (p *Provider) Name() string {
return "json"
}