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// Copyright 2017 Google Inc. All Rights Reserved. | |
// | |
// Licensed under the Apache License, Version 2.0 (the "License"); | |
// you may not use this file except in compliance with the License. | |
// You may obtain a copy of the License at | |
// | |
// http://www.apache.org/licenses/LICENSE-2.0 | |
// | |
// Unless required by applicable law or agreed to in writing, software | |
// distributed under the License is distributed on an "AS IS" BASIS, | |
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
// See the License for the specific language governing permissions and | |
// limitations under the License. | |
// nolint:forbidigo | |
package main | |
import ( | |
"flag" | |
"fmt" | |
"io/ioutil" | |
"log" | |
"net/http" | |
"os" | |
"strings" | |
"golift.io/badgedata" | |
_ "golift.io/badgedata/grafana" | |
"golift.io/turbovanityurls/pkg/handler" | |
yaml "gopkg.in/yaml.v3" | |
) | |
// Version is injected at build time. | |
var Version = "development" //nolint:gochecknoglobals | |
// Flags are the CLI flags. | |
type Flags struct { | |
ListenAddr string | |
ConfigPath string | |
ShowVer bool | |
} | |
type Config struct { | |
*handler.Config `yaml:",inline"` | |
BDPath string `yaml:"bd_path,omitempty"` | |
} | |
func ParseFlags(args []string) *Flags { | |
flag := flag.NewFlagSet(os.Args[0], flag.ExitOnError) | |
f := &Flags{ListenAddr: ":" + os.Getenv("PORT")} | |
if f.ListenAddr == ":" { | |
f.ListenAddr = ":8080" | |
} | |
flag.StringVar(&f.ListenAddr, "l", f.ListenAddr, "HTTP server listen address") | |
flag.StringVar(&f.ConfigPath, "c", DefaultConfFile, "config file path") | |
flag.BoolVar(&f.ShowVer, "v", false, "show version and exit") | |
flag.Usage = func() { | |
fmt.Println("Usage: turbovanityurls [-c <config-file>] [-l <listen-address>]") | |
flag.PrintDefaults() | |
} | |
_ = flag.Parse(args) | |
return f | |
} | |
func main() { | |
flags := ParseFlags(os.Args[1:]) | |
if flags.ShowVer { | |
fmt.Printf("%v v%v\n", "turbovanityurls", Version) | |
os.Exit(0) | |
} | |
if err := Setup(flags); err != nil { | |
log.Fatal(err) | |
} | |
if err := http.ListenAndServe(flags.ListenAddr, nil); err != nil { | |
log.Fatal(err) | |
} | |
} | |
func Setup(flags *Flags) error { | |
config := &Config{} | |
if err := config.ParseConfig(flags.ConfigPath); err != nil { | |
return err | |
} | |
vanityHandler, err := handler.New(config.Config) | |
if err != nil { | |
return fmt.Errorf("config file: %w", err) | |
} | |
if config.BDPath != "" { | |
http.Handle(config.BDPath, badgedata.Handler()) | |
} | |
http.Handle("/", vanityHandler) | |
if strings.HasPrefix(flags.ListenAddr, ":") { | |
// A message so you know when it's started; a clickable link for dev'ing. | |
log.Println("Listening at http://127.0.0.1" + flags.ListenAddr) | |
} | |
return nil | |
} | |
func (c *Config) ParseConfig(configPath string) error { | |
if _, err := os.Stat(configPath); os.IsNotExist(err) && configPath == DefaultConfFile { | |
log.Printf("Default Config File Not Found: %s - trying ./config.yaml", configPath) | |
configPath = "config.yaml" | |
} | |
data, err := ioutil.ReadFile(configPath) | |
if err != nil { | |
return fmt.Errorf("reading config file: %w", err) | |
} | |
if err := yaml.Unmarshal(data, c); err != nil { | |
return fmt.Errorf("unmarshaling config file: %w", err) | |
} | |
if c.Title == "" { | |
c.Title = c.Host | |
} | |
if c.BDPath != "" && !strings.HasSuffix(c.BDPath, "/") { | |
c.BDPath += "/" | |
} | |
return nil | |
} |