76 lines
1.4 KiB
Go
76 lines
1.4 KiB
Go
/*
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command ysvd implements the
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The "ysv" in ysvd stands for You're so Vain, the song by Carly Simon.
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*/
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package main
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import (
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"fmt"
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"log"
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"net/http"
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"os"
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"mcquay.me/vain"
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"github.com/kelseyhightower/envconfig"
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)
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const usage = `ysvd
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environment vars:
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YSV_PORT: tcp listen port
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YSV_HOST: hostname to use
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YSV_DB: path to json database
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`
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type config struct {
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Port int
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Host string
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DB string
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}
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func main() {
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c := &config{
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Port: 4040,
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}
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if err := envconfig.Process("ysv", c); err != nil {
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fmt.Fprintf(os.Stderr, "problem processing environment: %v", err)
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os.Exit(1)
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}
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if len(os.Args) > 1 {
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switch os.Args[1] {
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case "env", "e", "help", "h":
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fmt.Printf("%s\n", usage)
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os.Exit(0)
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}
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}
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if c.Host == "" {
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log.Printf("must set YSV_HOST; please run $(ysvd env) for more information")
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os.Exit(1)
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}
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if c.DB == "" {
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log.Printf("warning: in-memory db mode; if you do not want this set YSV_DB")
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}
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hostname := "localhost"
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if hn, err := os.Hostname(); err != nil {
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log.Printf("problem getting hostname:", err)
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} else {
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hostname = hn
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}
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log.Printf("serving at: http://%s:%d/", hostname, c.Port)
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sm := http.NewServeMux()
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ms := vain.NewMemStore(c.DB)
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if err := ms.Load(); err != nil {
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log.Printf("unable to load db: %v", err)
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os.Exit(1)
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}
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vain.NewServer(sm, ms, c.Host)
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addr := fmt.Sprintf(":%d", c.Port)
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if err := http.ListenAndServe(addr, sm); err != nil {
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log.Printf("problem with http server: %v", err)
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os.Exit(1)
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}
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}
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