Refactor modify and replace to their own files

utils/flags.go

@@ -0,0 +1,13 @@
+package utils
+
+import (
+	"flag"
+)
+
+var (
+	GitFlag       = flag.Bool("git", false, "Use git to manage files")
+	ResetFlag     = flag.Bool("reset", false, "Reset files to their original state")
+	LogLevel      = flag.String("loglevel", "INFO", "Set log level: ERROR, WARNING, INFO, DEBUG, TRACE")
+	Cookfile      = flag.String("cook", "**/cook.yml", "Path to cook config files, can be globbed")
+	ParallelFiles = flag.Int("P", 100, "Number of files to process in parallel")
+)

utils/modifycommand.go

@@ -0,0 +1,128 @@
+package utils
+
+import (
+	"fmt"
+	"modify/logger"
+
+	"github.com/bmatcuk/doublestar/v4"
+)
+
+type ModifyCommand struct {
+	Pattern  string   `yaml:"pattern"`
+	LuaExpr  string   `yaml:"lua"`
+	Files    []string `yaml:"files"`
+	Git      bool     `yaml:"git"`
+	Reset    bool     `yaml:"reset"`
+	LogLevel string   `yaml:"loglevel"`
+}
+type CookFile []ModifyCommand
+
+func (c *ModifyCommand) Validate() error {
+	if c.Pattern == "" {
+		return fmt.Errorf("pattern is required")
+	}
+	if c.LuaExpr == "" {
+		return fmt.Errorf("lua expression is required")
+	}
+	if len(c.Files) == 0 {
+		return fmt.Errorf("at least one file is required")
+	}
+	if c.LogLevel == "" {
+		c.LogLevel = "INFO"
+	}
+	return nil
+}
+
+func AssociateFilesWithCommands(files []string, commands []ModifyCommand) (map[string][]ModifyCommand, error) {
+	associationCount := 0
+	fileCommands := make(map[string][]ModifyCommand)
+	for _, file := range files {
+		for _, command := range commands {
+			for _, glob := range command.Files {
+				// TODO: Maybe memoize this function call
+				matches, err := doublestar.Match(glob, file)
+				if err != nil {
+					logger.Trace("Failed to match glob %s with file %s: %v", glob, file, err)
+					continue
+				}
+				if matches {
+					logger.Debug("Found match for file %q and command %q", file, command.Pattern)
+					fileCommands[file] = append(fileCommands[file], command)
+					associationCount++
+				}
+			}
+		}
+		logger.Debug("Found %d commands for file %q", len(fileCommands[file]), file)
+		if len(fileCommands[file]) == 0 {
+			logger.Info("No commands found for file %q", file)
+		}
+	}
+	logger.Info("Found %d associations between %d files and %d commands", associationCount, len(files), len(commands))
+	return fileCommands, nil
+}
+
+func AggregateGlobs(commands []ModifyCommand) map[string]struct{} {
+	logger.Info("Aggregating globs for %d commands", len(commands))
+	globs := make(map[string]struct{})
+	for _, command := range commands {
+		for _, glob := range command.Files {
+			globs[glob] = struct{}{}
+		}
+	}
+	logger.Info("Found %d unique globs", len(globs))
+	return globs
+}
+
+func LoadCommands(args []string) ([]ModifyCommand, error) {
+	commands := []ModifyCommand{}
+
+	logger.Info("Loading commands from cook files: %s", *Cookfile)
+	newcommands, err := LoadCommandsFromCookFiles(*Cookfile)
+	if err != nil {
+		return nil, fmt.Errorf("failed to load commands from cook files: %w", err)
+	}
+	logger.Info("Successfully loaded %d commands from cook files", len(newcommands))
+	commands = append(commands, newcommands...)
+	logger.Info("Now total commands: %d", len(commands))
+
+	logger.Info("Loading commands from arguments: %v", args)
+	newcommands, err = LoadCommandFromArgs(args)
+	if err != nil {
+		return nil, fmt.Errorf("failed to load commands from args: %w", err)
+	}
+	logger.Info("Successfully loaded %d commands from args", len(newcommands))
+	commands = append(commands, newcommands...)
+	logger.Info("Now total commands: %d", len(commands))
+
+	return commands, nil
+}
+
+func LoadCommandFromArgs(args []string) ([]ModifyCommand, error) {
+	// Cannot reset without git, right?
+	if *ResetFlag {
+		*GitFlag = true
+	}
+
+	if len(args) < 3 {
+		return nil, fmt.Errorf("at least %d arguments are required", 3)
+	}
+
+	command := ModifyCommand{
+		Pattern:  args[0],
+		LuaExpr:  args[1],
+		Files:    args[2:],
+		Git:      *GitFlag,
+		Reset:    *ResetFlag,
+		LogLevel: *LogLevel,
+	}
+
+	if err := command.Validate(); err != nil {
+		return nil, fmt.Errorf("invalid command: %w", err)
+	}
+
+	return []ModifyCommand{command}, nil
+}
+
+func LoadCommandsFromCookFiles(s string) ([]ModifyCommand, error) {
+	return nil, nil
+}

utils/replacecommand.go

@@ -0,0 +1,47 @@
+package utils
+
+import (
+	"fmt"
+	"modify/logger"
+)
+
+type ReplaceCommand struct {
+	From int
+	To   int
+	With string
+}
+
+func ExecuteModifications(modifications []ReplaceCommand, fileData string) (string, int) {
+	var err error
+	executed := 0
+	for _, modification := range modifications {
+		fileData, err = modification.Execute(fileData)
+		if err != nil {
+			logger.Error("Failed to execute modification: %v", err)
+			continue
+		}
+		executed++
+	}
+	logger.Info("Executed %d modifications", executed)
+	return fileData, executed
+}
+
+func (m *ReplaceCommand) Execute(fileDataStr string) (string, error) {
+	err := m.Validate(len(fileDataStr))
+	if err != nil {
+		return "", fmt.Errorf("failed to validate modification: %v", err)
+	}
+
+	logger.Trace("Replace pos %d-%d with %q", m.From, m.To, m.With)
+	return fileDataStr[:m.From] + m.With + fileDataStr[m.To:], nil
+}
+
+func (m *ReplaceCommand) Validate(maxsize int) error {
+	if m.To < m.From {
+		return fmt.Errorf("command to is less than from: %v", m)
+	}
+	if m.From > maxsize || m.To > maxsize {
+		return fmt.Errorf("command from or to is greater than replacement length: %v", m)
+	}
+	return nil
+}