changed when cartridgeloader is created for log/video regression

creating the cartridgeloader later in the regression process gives a
clearer indication of when and if the cartridgeloader is closed properly

cartridgeloader/naming.go

@@ -32,8 +32,14 @@ func decideOnName(ld Loader) string {
 		return ""
 	}
 
-	name := filepath.Base(ld.Filename)
-	name = strings.TrimSuffix(name, filepath.Ext(ld.Filename))
+	return NameFromFilename(ld.Filename)
+}
 
+// NameFromFilename converts a filename to a shortened version suitable for
+// display. Useful in some contexts where creating a cartridge loader instance
+// is inconvenient.
+func NameFromFilename(filename string) string {
+	name := filepath.Base(filename)
+	name = strings.TrimSuffix(name, filepath.Ext(filename))
 	return name
 }

debugger/debugger.go

@@ -1337,14 +1337,13 @@ func (dbg *Debugger) startComparison(comparisonROM string, comparisonPrefs strin
 		return err
 	}
 
-	// cartload is passed to comparision.CreateFromLoader(). closure will be
-	// handled from there
 	cartload, err := cartridgeloader.NewLoaderFromFilename(comparisonROM, "AUTO")
 	if err != nil {
 		return err
 	}
 
-	// comparision emulation handles closure of cartridgeloader
+	// cartload is passed to comparision.CreateFromLoader(). closure will be
+	// handled from there when comparision emulation ends
 	dbg.comparison.CreateFromLoader(cartload)
 
 	// check use of comparison prefs

gopher2600.go

@@ -785,19 +785,14 @@ with the LOG mode. Note that asking for log output will suppress regression prog
 
 		switch strings.ToUpper(regressMode) {
 		case "VIDEO":
-			cartload, err := cartridgeloader.NewLoaderFromFilename(args[0], mapping)
-			if err != nil {
-				return err
-			}
-			defer cartload.Close()
-
 			statetype, err := regression.NewStateType(state)
 			if err != nil {
 				return err
 			}
 
 			regressor = &regression.VideoRegression{
-				CartLoad:  cartload,
+				Cartridge: args[0],
+				Mapping:   mapping,
 				TVtype:    strings.ToUpper(spec),
 				NumFrames: numFrames,
 				State:     statetype,
@@ -811,14 +806,9 @@ with the LOG mode. Note that asking for log output will suppress regression prog
 				Notes:  notes,
 			}
 		case "LOG":
-			cartload, err := cartridgeloader.NewLoaderFromFilename(args[0], mapping)
-			if err != nil {
-				return err
-			}
-			defer cartload.Close()
-
 			regressor = &regression.LogRegression{
-				CartLoad:  cartload,
+				Cartridge: args[0],
+				Mapping:   mapping,
 				TVtype:    strings.ToUpper(spec),
 				NumFrames: numFrames,
 				Notes:     notes,

recorder/fileformat.go

@@ -111,7 +111,6 @@ func (plb *Playback) readHeader(lines []string, checkROM bool) error {
 
 	var err error
 
-	// read header
 	plb.CartLoad, err = cartridgeloader.NewLoaderFromFilename(lines[lineCartName], "AUTO")
 	if err != nil {
 		return fmt.Errorf("playback: %w", err)

regression/log.go

@@ -48,7 +48,8 @@ const (
 // the run. Regression passes if the subsequent runs produce the same
 // log/digest.
 type LogRegression struct {
-	CartLoad  cartridgeloader.Loader
+	Cartridge string
+	Mapping   string
 	TVtype    string
 	NumFrames int
 	Notes     string
@@ -66,18 +67,14 @@ func deserialiseLogEntry(fields database.SerialisedEntry) (database.Entry, error
 		return nil, fmt.Errorf("log: too few fields")
 	}
 
-	var err error
-
-	// string fields need no conversion
-	reg.CartLoad, err = cartridgeloader.NewLoaderFromFilename(fields[videoFieldCartName], fields[videoFieldCartMapping])
-	if err != nil {
-		return nil, fmt.Errorf("log: %w", err)
-	}
+	reg.Cartridge = fields[videoFieldCartName]
+	reg.Mapping = fields[videoFieldCartMapping]
 	reg.TVtype = fields[logFieldTVtype]
 	reg.digest = fields[logFieldDigest]
 	reg.Notes = fields[logFieldNotes]
 
-	// convert number of frames field
+	var err error
+
 	reg.NumFrames, err = strconv.Atoi(fields[logFieldNumFrames])
 	if err != nil {
 		msg := fmt.Sprintf("invalid numFrames field [%s]", fields[logFieldNumFrames])
@@ -95,8 +92,8 @@ func (reg LogRegression) EntryType() string {
 // Serialise implements the database.Entry interface.
 func (reg *LogRegression) Serialise() (database.SerialisedEntry, error) {
 	return database.SerialisedEntry{
-			reg.CartLoad.Filename,
-			reg.CartLoad.Mapping,
+			reg.Cartridge,
+			reg.Mapping,
 			reg.TVtype,
 			strconv.Itoa(reg.NumFrames),
 			reg.digest,
@@ -114,7 +111,9 @@ func (reg LogRegression) CleanUp() error {
 func (reg LogRegression) String() string {
 	s := strings.Builder{}
 
-	s.WriteString(fmt.Sprintf("[%s] %s [%s] frames=%d", reg.EntryType(), reg.CartLoad.Name, reg.TVtype, reg.NumFrames))
+	s.WriteString(fmt.Sprintf("[%s] %s [%s] frames=%d", reg.EntryType(),
+		cartridgeloader.NameFromFilename(reg.Cartridge),
+		reg.TVtype, reg.NumFrames))
 	if reg.Notes != "" {
 		s.WriteString(fmt.Sprintf(" [%s]", reg.Notes))
 	}
@@ -146,7 +145,13 @@ func (reg *LogRegression) regress(newRegression bool, output io.Writer, msg stri
 	// default the hardware preferences
 	vcs.Env.Normalise()
 
-	err = setup.AttachCartridge(vcs, reg.CartLoad, true)
+	cartload, err := cartridgeloader.NewLoaderFromFilename(reg.Cartridge, reg.Mapping)
+	if err != nil {
+		return false, "", fmt.Errorf("log: %w", err)
+	}
+	defer cartload.Close()
+
+	err = setup.AttachCartridge(vcs, cartload, true)
 	if err != nil {
 		return false, "", fmt.Errorf("log: %w", err)
 	}

regression/video.go

@@ -52,7 +52,8 @@ const (
 // emulation for N frames and the video recorded at that point. Regression
 // passes if subsequenct runs produce the same video value.
 type VideoRegression struct {
-	CartLoad     cartridgeloader.Loader
+	Cartridge    string
+	Mapping      string
 	TVtype       string
 	NumFrames    int
 	State        StateType
@@ -76,10 +77,8 @@ func deserialiseVideoEntry(fields database.SerialisedEntry) (database.Entry, err
 	var err error
 
 	// string fields need no conversion
-	reg.CartLoad, err = cartridgeloader.NewLoaderFromFilename(fields[videoFieldCartName], fields[videoFieldCartMapping])
-	if err != nil {
-		return nil, fmt.Errorf("video: %w", err)
-	}
+	reg.Cartridge = fields[videoFieldCartName]
+	reg.Mapping = fields[videoFieldCartMapping]
 	reg.TVtype = fields[videoFieldTVtype]
 	reg.digest = fields[videoFieldDigest]
 	reg.Notes = fields[videoFieldNotes]
@@ -128,8 +127,8 @@ func (reg VideoRegression) EntryType() string {
 // Serialise implements the database.Entry interface.
 func (reg *VideoRegression) Serialise() (database.SerialisedEntry, error) {
 	return database.SerialisedEntry{
-			reg.CartLoad.Filename,
-			reg.CartLoad.Mapping,
+			reg.Cartridge,
+			reg.Mapping,
 			reg.TVtype,
 			strconv.Itoa(reg.NumFrames),
 			reg.State.String(),
@@ -170,7 +169,9 @@ func (reg VideoRegression) String() string {
 		state = " [with state]"
 	}
 
-	s.WriteString(fmt.Sprintf("[%s] %s [%s] frames=%d%s", reg.EntryType(), reg.CartLoad.Name, reg.TVtype, reg.NumFrames, state))
+	s.WriteString(fmt.Sprintf("[%s] %s [%s] frames=%d%s", reg.EntryType(),
+		cartridgeloader.NameFromFilename(reg.Cartridge),
+		reg.TVtype, reg.NumFrames, state))
 	if reg.Notes != "" {
 		s.WriteString(fmt.Sprintf(" [%s]", reg.Notes))
 	}
@@ -204,7 +205,13 @@ func (reg *VideoRegression) regress(newRegression bool, output io.Writer, msg st
 	// default the hardware preferences
 	vcs.Env.Normalise()
 
-	err = setup.AttachCartridge(vcs, reg.CartLoad, true)
+	cartload, err := cartridgeloader.NewLoaderFromFilename(reg.Cartridge, reg.Mapping)
+	if err != nil {
+		return false, "", fmt.Errorf("log: %w", err)
+	}
+	defer cartload.Close()
+
+	err = setup.AttachCartridge(vcs, cartload, true)
 	if err != nil {
 		return false, "", fmt.Errorf("video: %w", err)
 	}
@@ -275,7 +282,7 @@ func (reg *VideoRegression) regress(newRegression bool, output io.Writer, msg st
 
 		if reg.State != StateNone {
 			// create a unique filename
-			reg.stateFile, err = uniqueFilename("state", reg.CartLoad.Name)
+			reg.stateFile, err = uniqueFilename("state", reg.Cartridge)
 			if err != nil {
 				return false, "", fmt.Errorf("video: %w", err)
 			}