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package main
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"runtime/debug"
"sort"
"time"
"git.sr.ht/~sircmpwn/getopt"
"github.com/mattn/go-isatty"
"github.com/xo/terminfo"
"git.sr.ht/~rjarry/aerc/commands"
"git.sr.ht/~rjarry/aerc/commands/account"
"git.sr.ht/~rjarry/aerc/commands/compose"
"git.sr.ht/~rjarry/aerc/commands/msg"
"git.sr.ht/~rjarry/aerc/commands/msgview"
"git.sr.ht/~rjarry/aerc/commands/terminal"
"git.sr.ht/~rjarry/aerc/config"
"git.sr.ht/~rjarry/aerc/lib"
"git.sr.ht/~rjarry/aerc/lib/templates"
libui "git.sr.ht/~rjarry/aerc/lib/ui"
"git.sr.ht/~rjarry/aerc/widgets"
)
func getCommands(selected libui.Drawable) []*commands.Commands {
switch selected.(type) {
case *widgets.AccountView:
return []*commands.Commands{
account.AccountCommands,
msg.MessageCommands,
commands.GlobalCommands,
}
case *widgets.Composer:
return []*commands.Commands{
compose.ComposeCommands,
commands.GlobalCommands,
}
case *widgets.MessageViewer:
return []*commands.Commands{
msgview.MessageViewCommands,
msg.MessageCommands,
commands.GlobalCommands,
}
case *widgets.Terminal:
return []*commands.Commands{
terminal.TerminalCommands,
commands.GlobalCommands,
}
default:
return []*commands.Commands{commands.GlobalCommands}
}
}
func execCommand(aerc *widgets.Aerc, ui *libui.UI, cmd []string) error {
cmds := getCommands((*aerc).SelectedTab())
for i, set := range cmds {
err := set.ExecuteCommand(aerc, cmd)
if _, ok := err.(commands.NoSuchCommand); ok {
if i == len(cmds)-1 {
return err
}
continue
} else if _, ok := err.(commands.ErrorExit); ok {
ui.Exit()
return nil
} else if err != nil {
return err
} else {
break
}
}
return nil
}
func getCompletions(aerc *widgets.Aerc, cmd string) []string {
var completions []string
for _, set := range getCommands((*aerc).SelectedTab()) {
completions = append(completions, set.GetCompletions(aerc, cmd)...)
}
sort.Strings(completions)
return completions
}
// set at build time
var Version string
func usage() {
log.Fatal("Usage: aerc [-v] [mailto:...]")
}
func setWindowTitle() {
ti, err := terminfo.LoadFromEnv()
if err != nil {
return
}
if !ti.Has(terminfo.HasStatusLine) {
return
}
buf := new(bytes.Buffer)
ti.Fprintf(buf, terminfo.ToStatusLine)
fmt.Fprint(buf, "aerc")
ti.Fprintf(buf, terminfo.FromStatusLine)
os.Stderr.Write(buf.Bytes())
}
func main() {
opts, optind, err := getopt.Getopts(os.Args, "v")
if err != nil {
log.Print(err)
usage()
return
}
for _, opt := range opts {
switch opt.Option {
case 'v':
fmt.Println("aerc " + Version)
return
}
}
retryExec := false
args := os.Args[optind:]
if len(args) > 1 {
usage()
return
} else if len(args) == 1 {
arg := args[0]
err := lib.ConnectAndExec(arg)
if err == nil {
return // other aerc instance takes over
}
fmt.Fprintf(os.Stderr, "Failed to communicate to aerc: %v\n", err)
// continue with setting up a new aerc instance and retry after init
retryExec = true
}
var (
logOut io.Writer
logger *log.Logger
)
if !isatty.IsTerminal(os.Stdout.Fd()) {
logOut = os.Stdout
} else {
logOut = ioutil.Discard
os.Stdout, _ = os.Open(os.DevNull)
}
logger = log.New(logOut, "", log.LstdFlags)
logger.Println("Starting up aerc")
conf, err := config.LoadConfigFromFile(nil, logger)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to load config: %v\n", err)
os.Exit(1)
}
var (
aerc *widgets.Aerc
ui *libui.UI
)
defer PanicTermFix(ui) // recover upon panic and try restoring the pty
aerc = widgets.NewAerc(conf, logger, func(cmd []string) error {
return execCommand(aerc, ui, cmd)
}, func(cmd string) []string {
return getCompletions(aerc, cmd)
}, &commands.CmdHistory)
ui, err = libui.Initialize(aerc)
if err != nil {
panic(err)
}
defer ui.Close()
if conf.Ui.MouseEnabled {
ui.EnableMouse()
}
logger.Println("Initializing PGP keyring")
lib.InitKeyring()
defer lib.UnlockKeyring()
logger.Println("Starting Unix server")
as, err := lib.StartServer(logger)
if err != nil {
logger.Printf("Failed to start Unix server: %v (non-fatal)", err)
} else {
defer as.Close()
as.OnMailto = aerc.Mailto
}
// set the aerc version so that we can use it in the template funcs
templates.SetVersion(Version)
if retryExec {
// retry execution
arg := args[0]
err := lib.ConnectAndExec(arg)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to communicate to aerc: %v\n", err)
aerc.CloseBackends()
return
}
}
if isatty.IsTerminal(os.Stderr.Fd()) {
setWindowTitle()
}
for !ui.ShouldExit() {
for aerc.Tick() {
// Continue updating our internal state
}
if !ui.Tick() {
// ~60 FPS
time.Sleep(16 * time.Millisecond)
}
}
aerc.CloseBackends()
}
//FatalTermFix prints the stacktrace upon panic and tries to recover the term
// not doing that leaves the terminal in a broken state
func PanicTermFix(ui *libui.UI) {
var err interface{}
if err = recover(); err == nil {
return
}
debug.PrintStack()
if ui != nil {
ui.Close()
}
fmt.Fprintf(os.Stderr, "aerc crashed: %v\n", err)
os.Exit(1)
}
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