sneak
194ce1dd16
One game run is one process, so game-over ends the process directly, as the C game did with exit(). myExit now restores the terminal (via the new Terminal.Fini) and calls os.Exit(0); the gameEnd sentinel, the recover in Run, and the recover in DeathDemo are gone. Run() no longer returns an error (it does not return — the game exits from within), and playit's pre-loop setup is split into startLevel/prePlay so tests can drive a bounded number of turns. Because death (combat, and starvation over a long session) now exits the process, the four Run()-to-completion tests can no longer run through the exit path: TestDeathUnwindsWithGameEnd is removed (it tested the deleted unwind), the crash-sweep and quit/save session tests are dropped, and TestRunDownStairs is reworked to drive the turn loop for a single descend. Score rendering, previously checked after a scripted quit, is now covered directly by TestScoreRendersList. Save/restore integrity remains covered by TestSaveRestoreRoundTrip.
134 lines
2.8 KiB
Go
134 lines
2.8 KiB
Go
// Command rogue is the Go port of Rogue 5.4.4: Exploring the Dungeons of
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// Doom. It is a faithful function-by-function port of the classic C game;
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// see ARCHITECTURE.md at the repository root.
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package main
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import (
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"flag"
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"fmt"
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"os"
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"os/signal"
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"os/user"
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"strconv"
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"syscall"
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"time"
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"git.eeqj.de/sneak/rgoue/game"
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"git.eeqj.de/sneak/rgoue/term"
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)
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func main() {
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os.Exit(run())
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}
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// run does the real work and returns an exit code. It only returns on a
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// startup error; once the game starts, it ends by exiting the process
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// from within (game.myExit restores the terminal first). The deferred
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// Fini covers the early-return paths.
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func run() int {
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scores := flag.Bool("s", false, "print the scoreboard and exit")
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deathDemo := flag.Bool("d", false, "die a random death (demo)")
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flag.Parse()
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params := loadParams()
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if *scores {
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game.New(params).ShowScores()
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return 0
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}
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t, err := term.New()
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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return 1
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}
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defer t.Fini()
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params.Term = t
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var g *game.RogueGame
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if args := flag.Args(); len(args) == 1 && !*deathDemo {
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// restore a saved game
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g, err = game.Restore(args[0], params)
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if err != nil {
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fmt.Fprintln(os.Stderr, err) // deferred Fini restores the terminal
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return 1
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}
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} else {
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g = game.New(params)
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}
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if *deathDemo {
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g.DeathDemo() // does not return: death exits the process
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return 0
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}
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installAutosave(g, t)
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g.Run() // does not return: the game ends by exiting the process
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return 0
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}
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// loadParams gathers the game parameters from the environment: home
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// directory, ROGUEOPTS, user name, wizard mode, and the dungeon seed
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// (main.c's startup).
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func loadParams() game.Params {
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home, _ := os.UserHomeDir()
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name := ""
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u, userErr := user.Current()
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if userErr == nil {
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name = u.Username
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}
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wizard := os.Getenv("ROGUE_WIZARD") != ""
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return game.Params{
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Seed: chooseSeed(wizard),
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Name: name,
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RogueOpts: os.Getenv("ROGUEOPTS"),
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Home: home,
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ScorePath: home + "/.rogue.scores",
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Wizard: wizard,
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}
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}
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// installAutosave saves the game and exits on SIGHUP/SIGTERM (save.c
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// auto_save).
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func installAutosave(g *game.RogueGame, t *term.Tcell) {
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sig := make(chan os.Signal, 1)
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signal.Notify(sig, syscall.SIGHUP, syscall.SIGTERM)
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go func() {
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<-sig
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g.AutoSave()
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t.Fini()
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os.Exit(0)
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}()
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}
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// chooseSeed picks the dungeon number: SEED for reproducible dungeons
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// (wizard mode, as in the C game), else time+pid (main.c).
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func chooseSeed(wizard bool) int32 {
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if env := os.Getenv("SEED"); env != "" && wizard {
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n, err := strconv.ParseInt(env, 10, 32)
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if err == nil {
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return int32(n)
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}
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}
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// The C game computed `lowtime + getpid()` in int; the truncation to
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// 32 bits is the same wraparound the C int arithmetic performed.
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return int32(time.Now().Unix()&0x7fffffff) +
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int32(os.Getpid()&0x7fffffff)
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}
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