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// Command atlas TODO.
package main
import (
"context"
"errors"
"fmt"
"os"
"os/signal"
"syscall"
"github.com/hashicorp/go-envparse"
_ "github.com/mattn/go-sqlite3"
"github.com/pg9182/atlas/pkg/atlas"
"github.com/spf13/pflag"
)
var opt struct {
Help bool
}
func init() {
pflag.BoolVarP(&opt.Help, "help", "h", false, "Show this help text")
}
func main() {
pflag.Parse()
if pflag.NArg() > 1 || opt.Help {
fmt.Printf("usage: %s [options] [env_file]\n\noptions:\n%s\nnote: if env_file is provided, config from the environment is ignored\n", os.Args[0], pflag.CommandLine.FlagUsages())
if opt.Help {
os.Exit(2)
}
os.Exit(0)
}
var e []string
if pflag.NArg() == 0 {
e = os.Environ()
} else {
if x, err := readEnv(pflag.Arg(0)); err == nil {
e = x
} else {
fmt.Fprintf(os.Stderr, "error: read env file: %v\n", err)
os.Exit(1)
}
if v, ok := os.LookupEnv("NOTIFY_SOCKET"); ok {
e = append(e, "NOTIFY_SOCKET="+v)
}
}
var c atlas.Config
if err := c.UnmarshalEnv(e, false); err != nil {
fmt.Fprintf(os.Stderr, "error: parse config: %v\n", err)
os.Exit(1)
}
s, err := atlas.NewServer(&c)
if err != nil {
fmt.Fprintf(os.Stderr, "error: initialize server: %v\n", err)
os.Exit(1)
}
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
defer stop()
hch := make(chan os.Signal, 1)
signal.Notify(hch, syscall.SIGHUP)
go func() {
for range hch {
fmt.Println("got SIGHUP")
s.HandleSIGHUP()
}
}()
if err := s.Run(ctx); err != nil && !errors.Is(err, context.Canceled) {
fmt.Fprintf(os.Stderr, "error: run server: %v\n", err)
os.Exit(1)
}
}
func readEnv(name string) ([]string, error) {
f, err := os.Open(name)
if err != nil {
return nil, err
}
defer f.Close()
m, err := envparse.Parse(f)
if err != nil {
return nil, err
}
var r []string
for k, v := range m {
r = append(r, k+"="+v)
}
return r, nil
}
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