Work out file reading and writing

main.go

@@ -44,6 +44,11 @@ type ModifyCommand struct {
 	Reset    bool     `yaml:"reset"`
 	LogLevel string   `yaml:"loglevel"`
 }
+type ReplaceCommand struct {
+	From int
+	To   int
+	With string
+}
 type CookFile []ModifyCommand
 
 func (c *ModifyCommand) Validate() error {
@@ -107,25 +112,48 @@ func main() {
 	files, err := ExpandGLobs(globs)
 	if err != nil {
 		logger.Error("Failed to expand file patterns: %v", err)
-		flag.Usage()
 		return
 	}
 	logger.Info("Found %d files to process", len(files))
 
-	associations, err := AssociateFilesWithCommands(files, commands)
-	if err != nil {
-		logger.Error("Failed to associate files with commands: %v", err)
-		flag.Usage()
-		return
-	}
-
-	log.Printf("%#v", associations)
 	// Somehow connect files to commands via globs..
-	// Maybe do....
 	// For each file check every glob of every command
 	// Maybe memoize this part
 	// That way we know what commands affect what files
+	associations, err := AssociateFilesWithCommands(files, commands)
+	if err != nil {
+		logger.Error("Failed to associate files with commands: %v", err)
+		return
+	}
+
+	// TODO: Utilize parallel workers for this
 	// Then for each file run all commands associated with the file
+	for file, commands := range associations {
+		fileData, err := os.ReadFile(file)
+		if err != nil {
+			logger.Error("Failed to read file %q: %v", file, err)
+			return
+		}
+		logger.Trace("Loaded %d bytes of data for file %q", len(fileData), file)
+
+		modifications := []ReplaceCommand{}
+		for _, command := range commands {
+			logger.Info("Processing file %q with command %q", file, command.Pattern)
+			// TODO: Run processor and return modifications
+		}
+
+		for _, modification := range modifications {
+			logger.Info("Modifying file %q from %d to %d with %q", file, modification.From, modification.To, modification.With)
+			// TODO: Execute modifications
+		}
+
+		err = os.WriteFile(file, fileData, 0644)
+		if err != nil {
+			logger.Error("Failed to write file %q: %v", file, err)
+			return
+		}
+	}
+
 	// Aggregate all the modifications and execute them
 	// Taking care of the whole duplicates and shit
 	// This will also relieve processor of some of the file loading
@@ -296,8 +324,6 @@ func LoadCommandFromArgs(args []string) ([]ModifyCommand, error) {
 	}
 
 	if len(args) < 3 {
-		logger.Error("At least %d arguments are required", 3)
-		flag.Usage()
 		return nil, fmt.Errorf("at least %d arguments are required", 3)
 	}
 
@@ -311,9 +337,7 @@ func LoadCommandFromArgs(args []string) ([]ModifyCommand, error) {
 	}
 
 	if err := command.Validate(); err != nil {
-		logger.Error("Invalid command: %v", err)
-		flag.Usage()
-		return nil, fmt.Errorf("invalid command: %v", err)
+		return nil, fmt.Errorf("invalid command: %w", err)
 	}
 
 	return []ModifyCommand{command}, nil

processor/processor.go

@@ -31,15 +31,6 @@ type Processor interface {
 	FromLua(L *lua.LState) (interface{}, error)
 }
 
-// ModificationRecord tracks a single value modification
-type ModificationRecord struct {
-	File      string
-	OldValue  string
-	NewValue  string
-	Operation string
-	Context   string
-}
-
 func NewLuaState() (*lua.LState, error) {
 	L := lua.NewState()
 	// defer L.Close()

processor/regex.go

@@ -90,11 +90,6 @@ type CaptureGroup struct {
 	Updated string
 	Range   [2]int
 }
-type ReplaceCommand struct {
-	From int
-	To   int
-	With string
-}
 
 // ProcessContent applies regex replacement with Lua processing
 func (p *RegexProcessor) ProcessContent(content string, pattern string, luaExpr string) (string, int, int, error) {