add demo warriors when no arguments are given (#77)

.gitignore

@@ -1,2 +1,2 @@
-vmars
-gmars
+/vmars
+/gmars

cmd/vmars/game.go

@@ -74,20 +74,6 @@ func (g *Game) handleInput() {
 	}
 }
 
-func (g *Game) runCycle() {
-	if g.finished {
-		return
-	}
-
-	count := g.sim.WarriorCount()
-	living := g.sim.WarriorLivingCount()
-	if ((count > 1 && living > 1) || living > 0) && g.sim.CycleCount() < g.sim.MaxCycles() {
-		g.sim.RunCycle()
-	} else {
-		g.finished = true
-	}
-}
-
 func (g *Game) Update() error {
 	speed := speeds[g.speedStep]
 

cmd/vmars/main.go

@@ -92,24 +92,38 @@ func main() {
 	if len(args) > 2 {
 		fmt.Fprintf(os.Stderr, "only 2 warrior battles supported")
 		os.Exit(1)
+	} else if len(args) == 0 {
+		fmt.Fprintf(os.Stderr, "loading demo warriors")
 	}
 
 	warriors := make([]gmars.WarriorData, 0)
-	for _, arg := range args {
-		in, err := os.Open(arg)
-		if err != nil {
-			fmt.Printf("error opening warrior file '%s': %s\n", arg, err)
-			os.Exit(1)
+	if len(args) == 0 {
+		for _, data := range [][]byte{gmars.BombSpiral_94_red, gmars.SimpleShot_94_red} {
+			warrior, err := gmars.CompileWarrior(bytes.NewReader(data), config)
+			if err != nil {
+				fmt.Printf("error compiling build-in warrior file: %s\n", err)
+				os.Exit(1)
+			}
+
+			warriors = append(warriors, warrior)
 		}
-		defer in.Close()
-
-		warrior, err := gmars.CompileWarrior(in, config)
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "error parsing warrior file '%s': %s\n", arg, err)
-			os.Exit(1)
+	} else {
+		for _, arg := range args {
+			in, err := os.Open(arg)
+			if err != nil {
+				fmt.Printf("error opening warrior file '%s': %s\n", arg, err)
+				os.Exit(1)
+			}
+			defer in.Close()
+
+			warrior, err := gmars.CompileWarrior(in, config)
+			if err != nil {
+				fmt.Fprintf(os.Stderr, "error parsing warrior file '%s': %s\n", arg, err)
+				os.Exit(1)
+			}
+
+			warriors = append(warriors, warrior)
 		}
-
-		warriors = append(warriors, warrior)
 	}
 
 	sim, err := gmars.NewReportingSimulator(config)

cmd/vmars/sim.go

@@ -0,0 +1,15 @@
+package main
+
+func (g *Game) runCycle() {
+	if g.finished {
+		return
+	}
+
+	count := g.sim.WarriorCount()
+	living := g.sim.WarriorLivingCount()
+	if ((count > 1 && living > 1) || living > 0) && g.sim.CycleCount() < g.sim.MaxCycles() {
+		g.sim.RunCycle()
+	} else {
+		g.finished = true
+	}
+}

embed.go

@@ -6,11 +6,14 @@ import (
 
 var (
 	//go:embed warriors/88/imp.red
-	imp_88_red []byte
+	Imp_88_red []byte
 
 	//go:embed warriors/94/imp.red
-	imp_94_red []byte
+	Imp_94_red []byte
 
 	//go:embed warriors/94/simpleshot.red
-	simpleshot_94_red []byte
+	SimpleShot_94_red []byte
+
+	//go:embed warriors/94/bombspiral.red
+	BombSpiral_94_red []byte
 )

load_test.go

@@ -18,7 +18,7 @@ type instructionParseTestCase struct {
 func TestLoadImp88(t *testing.T) {
 	config := ConfigKOTH88
 
-	reader := bytes.NewReader(imp_88_red)
+	reader := bytes.NewReader(Imp_88_red)
 	data, err := ParseLoadFile(reader, config)
 	require.NoError(t, err)
 	require.Equal(t, "Imp", data.Name)
@@ -32,7 +32,7 @@ func TestLoadImp88(t *testing.T) {
 func TestLoadImp94(t *testing.T) {
 	config := ConfigNOP94
 
-	reader := bytes.NewReader(imp_94_red)
+	reader := bytes.NewReader(Imp_94_red)
 	data, err := ParseLoadFile(reader, config)
 	require.NoError(t, err)
 	require.Equal(t, "Imp", data.Name)

sim_test.go

@@ -46,7 +46,7 @@ func TestSimDwarf(t *testing.T) {
 }
 
 func TestRunImp(t *testing.T) {
-	reader := bytes.NewReader(imp_88_red)
+	reader := bytes.NewReader(Imp_88_red)
 	config := ConfigKOTH88
 	impdata, err := ParseLoadFile(reader, config)
 	require.NoError(t, err)
@@ -66,7 +66,7 @@ func TestRunImp(t *testing.T) {
 }
 
 func TestRunTwoImps(t *testing.T) {
-	reader := bytes.NewReader(imp_88_red)
+	reader := bytes.NewReader(Imp_88_red)
 	config := ConfigKOTH88
 	impdata, err := ParseLoadFile(reader, config)
 	require.NoError(t, err)