Format code
This commit is contained in:
4
.gitignore
vendored
4
.gitignore
vendored
@@ -1,2 +1,2 @@
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main.exe
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main.exe
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480
main.go
480
main.go
@@ -1,240 +1,240 @@
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package main
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import (
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"bufio"
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"flag"
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"fmt"
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"log"
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"os"
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"regexp"
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"strings"
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)
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const deliminer = ","
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const (
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Black = "\033[30m"
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Red = "\033[31m"
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Green = "\033[32m"
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Yellow = "\033[33m"
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Blue = "\033[34m"
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Magenta = "\033[35m"
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Cyan = "\033[36m"
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White = "\033[37m"
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)
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const SourceColor = Magenta
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const TargetColor = Yellow
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const ErrorColor = Red
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const DefaultColor = White
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const PathColor = Green
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var DirRegex, _ = regexp.Compile(`^(.+?)[/\\]sync$`)
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var programName = os.Args[0]
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type LinkInstruction struct {
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Source string
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Target string
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Force bool
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}
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func main() {
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// Format:
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// source,target,force?
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log.SetFlags(log.Lmicroseconds)
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recurse := flag.String("r", "", "recurse into directories")
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file := flag.String("f", "", "file to read instructions from")
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flag.Parse()
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log.Printf("Recurse: %s", *recurse)
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log.Printf("File: %s", *file)
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var instructions []LinkInstruction
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if *recurse != "" {
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instructions, _ = ReadFromFilesRecursively(*recurse)
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} else if *file != "" {
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instructions, _ = ReadFromFile(*file)
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} else if len(os.Args) > 1 {
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instructions, _ = ReadFromArgs()
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} else {
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instructions, _ = ReadFromStdin()
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}
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if len(instructions) == 0 {
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log.Printf("No input provided")
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log.Printf("Provide input as: ")
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log.Printf("Arguments - %s <source>,<target>,<force?>", programName)
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log.Printf("File - %s -f <file>", programName)
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log.Printf("Folder (finding sync files in folder recursively) - %s -r <folder>", programName)
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log.Printf("stdin - (cat <file> | %s)", programName)
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os.Exit(1)
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}
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for _, instruction := range instructions {
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log.Printf("Processing: %s", InstructionToString(instruction))
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err := RunInstruction(instruction)
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if err != nil {
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log.Printf("Failed parsing instruction %s%s%s due to %s%+v%s", SourceColor, InstructionToString(instruction), DefaultColor, ErrorColor, err, DefaultColor)
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continue
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}
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}
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}
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func ReadFromFilesRecursively(input string) ([]LinkInstruction, error) {
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input = NormalizePath(input)
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log.Printf("Reading input from files recursively starting in %s%s%s", PathColor, input, DefaultColor)
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var instructions []LinkInstruction
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files, err := GetSyncFilesRecursively(input)
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if err != nil {
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log.Fatalf("Failed to get sync files recursively: %s%+v%s", ErrorColor, err, DefaultColor)
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}
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for _, file := range files {
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file = NormalizePath(file)
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// This "has" to be done because instructions are resolved in relation to cwd
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fileDir := DirRegex.FindStringSubmatch(file)
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if fileDir == nil {
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log.Printf("Failed to extract directory from %s%s%s", SourceColor, file, DefaultColor)
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continue
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}
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log.Printf("Changing directory to %s%s%s (for %s%s%s)", PathColor, fileDir[1], DefaultColor, PathColor, file, DefaultColor)
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err := os.Chdir(fileDir[1])
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if err != nil {
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log.Printf("Failed to change directory to %s%s%s: %s%+v%s", SourceColor, fileDir[1], DefaultColor, ErrorColor, err, DefaultColor)
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continue
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}
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fileInstructions, _ := ReadFromFile(file)
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instructions = append(instructions, fileInstructions...)
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}
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return instructions, nil
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}
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func ReadFromFile(input string) ([]LinkInstruction, error) {
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input = NormalizePath(input)
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log.Printf("Reading input from file: %s%s%s", PathColor, input, DefaultColor)
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var instructions []LinkInstruction
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file, err := os.Open(input)
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if err != nil {
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log.Fatalf("Failed to open file %s%s%s: %s%+v%s", SourceColor, input, DefaultColor, ErrorColor, err, DefaultColor)
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}
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defer file.Close()
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scanner := bufio.NewScanner(file)
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for scanner.Scan() {
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line := scanner.Text()
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instruction, err := ParseInstruction(line)
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if err != nil {
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log.Printf("Error parsing line: %s'%s'%s, error: %s%+v%s", SourceColor, line, DefaultColor, ErrorColor, err, DefaultColor)
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continue
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}
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instructions = append(instructions, instruction)
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}
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log.Printf("Read %d instructions from file", len(instructions))
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return instructions, nil
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}
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func ReadFromArgs() ([]LinkInstruction, error) {
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log.Printf("Reading input from args")
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var instructions []LinkInstruction
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for _, arg := range os.Args[1:] {
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instruction, err := ParseInstruction(arg)
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if err != nil {
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log.Printf("Error parsing arg: %s'%s'%s, error: %s%+v%s", SourceColor, arg, DefaultColor, ErrorColor, err, DefaultColor)
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continue
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}
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instructions = append(instructions, instruction)
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}
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log.Printf("Read %d instructions from args", len(instructions))
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return instructions, nil
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}
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func ReadFromStdin() ([]LinkInstruction, error) {
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log.Printf("Reading input from stdin")
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var instructions []LinkInstruction
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info, err := os.Stdin.Stat()
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if err != nil {
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log.Fatalf("Failed to stat stdin: %s%+v%s", ErrorColor, err, DefaultColor)
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}
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if info.Mode()&os.ModeNamedPipe != 0 {
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scanner := bufio.NewScanner(os.Stdin)
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for scanner.Scan() {
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line := scanner.Text()
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instruction, err := ParseInstruction(line)
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if err != nil {
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log.Printf("Error parsing line: %s'%s'%s, error: %s%+v%s", SourceColor, line, DefaultColor, ErrorColor, err, DefaultColor)
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continue
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}
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instructions = append(instructions, instruction)
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}
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if err := scanner.Err(); err != nil {
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log.Fatalf("Error reading from stdin: %s%+v%s", ErrorColor, err, DefaultColor)
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}
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}
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log.Printf("Read %d instructions from stdin", len(instructions))
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return instructions, nil
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}
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func ParseInstruction(line string) (LinkInstruction, error) {
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parts := strings.Split(line, deliminer)
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instruction := LinkInstruction{}
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if len(parts) < 2 {
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return instruction, fmt.Errorf("invalid format - not enough parameters (must have at least source and target)")
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}
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instruction.Source = parts[0]
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instruction.Target = parts[1]
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instruction.Force = false
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if len(parts) > 2 {
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res, _ := regexp.MatchString("^(?i)T|TRUE$", parts[2])
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instruction.Force = res
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}
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instruction.Source, _ = ConvertHome(instruction.Source)
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instruction.Target, _ = ConvertHome(instruction.Target)
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instruction.Source = NormalizePath(instruction.Source)
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instruction.Target = NormalizePath(instruction.Target)
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return instruction, nil
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}
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func RunInstruction(instruction LinkInstruction) error {
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if !FileExists(instruction.Source) {
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return fmt.Errorf("instruction source %s%s%s does not exist", SourceColor, instruction.Source, DefaultColor)
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}
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if AreSame(instruction.Source, instruction.Target) {
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log.Printf("Source %s%s%s and target %s%s%s are the same, %snothing to do...%s", SourceColor, instruction.Source, DefaultColor, TargetColor, instruction.Target, DefaultColor, PathColor, DefaultColor)
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return nil
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}
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if FileExists(instruction.Target) {
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if instruction.Force {
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isSymlink, err := IsSymlink(instruction.Target)
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if err != nil {
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return fmt.Errorf("could not determine whether %s%s%s is a sym link or not, stopping; err: %s%+v%s", TargetColor, instruction.Target, DefaultColor, ErrorColor, err, DefaultColor)
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}
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if isSymlink {
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log.Printf("Removing symlink at %s%s%s", TargetColor, instruction.Target, DefaultColor)
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err = os.Remove(instruction.Target)
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if err != nil {
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return fmt.Errorf("failed deleting %s%s%s due to %s%+v%s", TargetColor, instruction.Target, DefaultColor, ErrorColor, err, DefaultColor)
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}
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} else {
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return fmt.Errorf("refusing to delte actual (non symlink) file %s%s%s", TargetColor, instruction.Target, DefaultColor)
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}
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} else {
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return fmt.Errorf("target %s%s%s exists - handle manually or set the 'forced' flag (3rd field)", TargetColor, instruction.Target, DefaultColor)
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}
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}
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err := os.Symlink(instruction.Source, instruction.Target)
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if err != nil {
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return fmt.Errorf("failed creating symlink between %s%s%s and %s%s%s with error %s%+v%s", SourceColor, instruction.Source, DefaultColor, TargetColor, instruction.Target, DefaultColor, ErrorColor, err, DefaultColor)
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}
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log.Printf("Created symlink between %s%s%s and %s%s%s", SourceColor, instruction.Source, DefaultColor, TargetColor, instruction.Target, DefaultColor)
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return nil
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}
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package main
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import (
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"bufio"
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"flag"
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"fmt"
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"log"
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"os"
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"regexp"
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"strings"
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)
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const deliminer = ","
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const (
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Black = "\033[30m"
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Red = "\033[31m"
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Green = "\033[32m"
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Yellow = "\033[33m"
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Blue = "\033[34m"
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Magenta = "\033[35m"
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Cyan = "\033[36m"
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White = "\033[37m"
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)
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const SourceColor = Magenta
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const TargetColor = Yellow
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const ErrorColor = Red
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const DefaultColor = White
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const PathColor = Green
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var DirRegex, _ = regexp.Compile(`^(.+?)[/\\]sync$`)
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var programName = os.Args[0]
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type LinkInstruction struct {
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Source string
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Target string
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Force bool
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}
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func main() {
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// Format:
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// source,target,force?
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log.SetFlags(log.Lmicroseconds)
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recurse := flag.String("r", "", "recurse into directories")
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file := flag.String("f", "", "file to read instructions from")
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flag.Parse()
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log.Printf("Recurse: %s", *recurse)
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log.Printf("File: %s", *file)
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var instructions []LinkInstruction
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if *recurse != "" {
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instructions, _ = ReadFromFilesRecursively(*recurse)
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} else if *file != "" {
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instructions, _ = ReadFromFile(*file)
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} else if len(os.Args) > 1 {
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instructions, _ = ReadFromArgs()
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} else {
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instructions, _ = ReadFromStdin()
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}
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if len(instructions) == 0 {
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log.Printf("No input provided")
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log.Printf("Provide input as: ")
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log.Printf("Arguments - %s <source>,<target>,<force?>", programName)
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log.Printf("File - %s -f <file>", programName)
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log.Printf("Folder (finding sync files in folder recursively) - %s -r <folder>", programName)
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log.Printf("stdin - (cat <file> | %s)", programName)
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os.Exit(1)
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}
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for _, instruction := range instructions {
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log.Printf("Processing: %s", InstructionToString(instruction))
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err := RunInstruction(instruction)
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if err != nil {
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log.Printf("Failed parsing instruction %s%s%s due to %s%+v%s", SourceColor, InstructionToString(instruction), DefaultColor, ErrorColor, err, DefaultColor)
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continue
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}
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}
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}
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func ReadFromFilesRecursively(input string) ([]LinkInstruction, error) {
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input = NormalizePath(input)
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log.Printf("Reading input from files recursively starting in %s%s%s", PathColor, input, DefaultColor)
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var instructions []LinkInstruction
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files, err := GetSyncFilesRecursively(input)
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if err != nil {
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log.Fatalf("Failed to get sync files recursively: %s%+v%s", ErrorColor, err, DefaultColor)
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}
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for _, file := range files {
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file = NormalizePath(file)
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// This "has" to be done because instructions are resolved in relation to cwd
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fileDir := DirRegex.FindStringSubmatch(file)
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if fileDir == nil {
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log.Printf("Failed to extract directory from %s%s%s", SourceColor, file, DefaultColor)
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continue
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}
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log.Printf("Changing directory to %s%s%s (for %s%s%s)", PathColor, fileDir[1], DefaultColor, PathColor, file, DefaultColor)
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err := os.Chdir(fileDir[1])
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if err != nil {
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log.Printf("Failed to change directory to %s%s%s: %s%+v%s", SourceColor, fileDir[1], DefaultColor, ErrorColor, err, DefaultColor)
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continue
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}
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fileInstructions, _ := ReadFromFile(file)
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instructions = append(instructions, fileInstructions...)
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}
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return instructions, nil
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}
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func ReadFromFile(input string) ([]LinkInstruction, error) {
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input = NormalizePath(input)
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log.Printf("Reading input from file: %s%s%s", PathColor, input, DefaultColor)
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var instructions []LinkInstruction
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file, err := os.Open(input)
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if err != nil {
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log.Fatalf("Failed to open file %s%s%s: %s%+v%s", SourceColor, input, DefaultColor, ErrorColor, err, DefaultColor)
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}
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defer file.Close()
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scanner := bufio.NewScanner(file)
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for scanner.Scan() {
|
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line := scanner.Text()
|
||||
instruction, err := ParseInstruction(line)
|
||||
if err != nil {
|
||||
log.Printf("Error parsing line: %s'%s'%s, error: %s%+v%s", SourceColor, line, DefaultColor, ErrorColor, err, DefaultColor)
|
||||
continue
|
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}
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instructions = append(instructions, instruction)
|
||||
}
|
||||
log.Printf("Read %d instructions from file", len(instructions))
|
||||
return instructions, nil
|
||||
}
|
||||
func ReadFromArgs() ([]LinkInstruction, error) {
|
||||
log.Printf("Reading input from args")
|
||||
var instructions []LinkInstruction
|
||||
for _, arg := range os.Args[1:] {
|
||||
instruction, err := ParseInstruction(arg)
|
||||
if err != nil {
|
||||
log.Printf("Error parsing arg: %s'%s'%s, error: %s%+v%s", SourceColor, arg, DefaultColor, ErrorColor, err, DefaultColor)
|
||||
continue
|
||||
}
|
||||
instructions = append(instructions, instruction)
|
||||
}
|
||||
log.Printf("Read %d instructions from args", len(instructions))
|
||||
return instructions, nil
|
||||
}
|
||||
func ReadFromStdin() ([]LinkInstruction, error) {
|
||||
log.Printf("Reading input from stdin")
|
||||
var instructions []LinkInstruction
|
||||
|
||||
info, err := os.Stdin.Stat()
|
||||
if err != nil {
|
||||
log.Fatalf("Failed to stat stdin: %s%+v%s", ErrorColor, err, DefaultColor)
|
||||
}
|
||||
if info.Mode()&os.ModeNamedPipe != 0 {
|
||||
scanner := bufio.NewScanner(os.Stdin)
|
||||
for scanner.Scan() {
|
||||
line := scanner.Text()
|
||||
instruction, err := ParseInstruction(line)
|
||||
if err != nil {
|
||||
log.Printf("Error parsing line: %s'%s'%s, error: %s%+v%s", SourceColor, line, DefaultColor, ErrorColor, err, DefaultColor)
|
||||
continue
|
||||
}
|
||||
instructions = append(instructions, instruction)
|
||||
}
|
||||
if err := scanner.Err(); err != nil {
|
||||
log.Fatalf("Error reading from stdin: %s%+v%s", ErrorColor, err, DefaultColor)
|
||||
}
|
||||
}
|
||||
|
||||
log.Printf("Read %d instructions from stdin", len(instructions))
|
||||
return instructions, nil
|
||||
}
|
||||
|
||||
func ParseInstruction(line string) (LinkInstruction, error) {
|
||||
parts := strings.Split(line, deliminer)
|
||||
instruction := LinkInstruction{}
|
||||
|
||||
if len(parts) < 2 {
|
||||
return instruction, fmt.Errorf("invalid format - not enough parameters (must have at least source and target)")
|
||||
}
|
||||
|
||||
instruction.Source = parts[0]
|
||||
instruction.Target = parts[1]
|
||||
instruction.Force = false
|
||||
if len(parts) > 2 {
|
||||
res, _ := regexp.MatchString("^(?i)T|TRUE$", parts[2])
|
||||
instruction.Force = res
|
||||
}
|
||||
|
||||
instruction.Source, _ = ConvertHome(instruction.Source)
|
||||
instruction.Target, _ = ConvertHome(instruction.Target)
|
||||
|
||||
instruction.Source = NormalizePath(instruction.Source)
|
||||
instruction.Target = NormalizePath(instruction.Target)
|
||||
|
||||
return instruction, nil
|
||||
}
|
||||
|
||||
func RunInstruction(instruction LinkInstruction) error {
|
||||
if !FileExists(instruction.Source) {
|
||||
return fmt.Errorf("instruction source %s%s%s does not exist", SourceColor, instruction.Source, DefaultColor)
|
||||
}
|
||||
|
||||
if AreSame(instruction.Source, instruction.Target) {
|
||||
log.Printf("Source %s%s%s and target %s%s%s are the same, %snothing to do...%s", SourceColor, instruction.Source, DefaultColor, TargetColor, instruction.Target, DefaultColor, PathColor, DefaultColor)
|
||||
return nil
|
||||
}
|
||||
|
||||
if FileExists(instruction.Target) {
|
||||
if instruction.Force {
|
||||
isSymlink, err := IsSymlink(instruction.Target)
|
||||
if err != nil {
|
||||
return fmt.Errorf("could not determine whether %s%s%s is a sym link or not, stopping; err: %s%+v%s", TargetColor, instruction.Target, DefaultColor, ErrorColor, err, DefaultColor)
|
||||
}
|
||||
|
||||
if isSymlink {
|
||||
log.Printf("Removing symlink at %s%s%s", TargetColor, instruction.Target, DefaultColor)
|
||||
err = os.Remove(instruction.Target)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed deleting %s%s%s due to %s%+v%s", TargetColor, instruction.Target, DefaultColor, ErrorColor, err, DefaultColor)
|
||||
}
|
||||
} else {
|
||||
return fmt.Errorf("refusing to delte actual (non symlink) file %s%s%s", TargetColor, instruction.Target, DefaultColor)
|
||||
}
|
||||
} else {
|
||||
return fmt.Errorf("target %s%s%s exists - handle manually or set the 'forced' flag (3rd field)", TargetColor, instruction.Target, DefaultColor)
|
||||
}
|
||||
}
|
||||
|
||||
err := os.Symlink(instruction.Source, instruction.Target)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed creating symlink between %s%s%s and %s%s%s with error %s%+v%s", SourceColor, instruction.Source, DefaultColor, TargetColor, instruction.Target, DefaultColor, ErrorColor, err, DefaultColor)
|
||||
}
|
||||
log.Printf("Created symlink between %s%s%s and %s%s%s", SourceColor, instruction.Source, DefaultColor, TargetColor, instruction.Target, DefaultColor)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
176
util.go
176
util.go
@@ -1,88 +1,88 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io/fs"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"strconv"
|
||||
"strings"
|
||||
)
|
||||
|
||||
func IsSymlink(path string) (bool, error) {
|
||||
fileInfo, err := os.Lstat(path)
|
||||
if err != nil {
|
||||
return false, err
|
||||
}
|
||||
|
||||
// os.ModeSymlink is a bitmask that identifies the symlink mode.
|
||||
// If the file mode & os.ModeSymlink is non-zero, the file is a symlink.
|
||||
return fileInfo.Mode()&os.ModeSymlink != 0, nil
|
||||
}
|
||||
|
||||
func FileExists(path string) bool {
|
||||
_, err := os.Lstat(path)
|
||||
return err == nil
|
||||
}
|
||||
|
||||
func NormalizePath(input string) string {
|
||||
workingdirectory, _ := os.Getwd()
|
||||
input = strings.ReplaceAll(input, "\\", "/")
|
||||
input = strings.ReplaceAll(input, "\"", "")
|
||||
|
||||
if !filepath.IsAbs(input) {
|
||||
input = workingdirectory + "/" + input
|
||||
}
|
||||
|
||||
return filepath.Clean(input)
|
||||
}
|
||||
|
||||
func AreSame(lhs string, rhs string) bool {
|
||||
lhsinfo, err := os.Stat(lhs)
|
||||
if err != nil {
|
||||
return false
|
||||
}
|
||||
rhsinfo, err := os.Stat(rhs)
|
||||
if err != nil {
|
||||
return false
|
||||
}
|
||||
|
||||
return os.SameFile(lhsinfo, rhsinfo)
|
||||
}
|
||||
|
||||
func ConvertHome(input string) (string, error) {
|
||||
if strings.Contains(input, "~") {
|
||||
homedir, err := os.UserHomeDir()
|
||||
if err != nil {
|
||||
return input, fmt.Errorf("unable to convert ~ to user directory with error %+v", err)
|
||||
}
|
||||
|
||||
return strings.Replace(input, "~", homedir, 1), nil
|
||||
}
|
||||
return input, nil
|
||||
}
|
||||
|
||||
func InstructionToString(instruction LinkInstruction) string {
|
||||
return fmt.Sprintf("%s%s%s%s%s%s%s%s%s", SourceColor, instruction.Source, DefaultColor, deliminer, TargetColor, instruction.Target, DefaultColor, deliminer, strconv.FormatBool(instruction.Force))
|
||||
}
|
||||
|
||||
func GetSyncFilesRecursively(input string) ([]string, error) {
|
||||
var files []string
|
||||
err := filepath.WalkDir(input, func(path string, file fs.DirEntry, err error) error {
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// Effectively only find files named "sync" (with no extension!!)
|
||||
if !file.IsDir() && DirRegex.MatchString(path) {
|
||||
files = append(files, path)
|
||||
}
|
||||
|
||||
return nil
|
||||
})
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return files, nil
|
||||
}
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io/fs"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"strconv"
|
||||
"strings"
|
||||
)
|
||||
|
||||
func IsSymlink(path string) (bool, error) {
|
||||
fileInfo, err := os.Lstat(path)
|
||||
if err != nil {
|
||||
return false, err
|
||||
}
|
||||
|
||||
// os.ModeSymlink is a bitmask that identifies the symlink mode.
|
||||
// If the file mode & os.ModeSymlink is non-zero, the file is a symlink.
|
||||
return fileInfo.Mode()&os.ModeSymlink != 0, nil
|
||||
}
|
||||
|
||||
func FileExists(path string) bool {
|
||||
_, err := os.Lstat(path)
|
||||
return err == nil
|
||||
}
|
||||
|
||||
func NormalizePath(input string) string {
|
||||
workingdirectory, _ := os.Getwd()
|
||||
input = strings.ReplaceAll(input, "\\", "/")
|
||||
input = strings.ReplaceAll(input, "\"", "")
|
||||
|
||||
if !filepath.IsAbs(input) {
|
||||
input = workingdirectory + "/" + input
|
||||
}
|
||||
|
||||
return filepath.Clean(input)
|
||||
}
|
||||
|
||||
func AreSame(lhs string, rhs string) bool {
|
||||
lhsinfo, err := os.Stat(lhs)
|
||||
if err != nil {
|
||||
return false
|
||||
}
|
||||
rhsinfo, err := os.Stat(rhs)
|
||||
if err != nil {
|
||||
return false
|
||||
}
|
||||
|
||||
return os.SameFile(lhsinfo, rhsinfo)
|
||||
}
|
||||
|
||||
func ConvertHome(input string) (string, error) {
|
||||
if strings.Contains(input, "~") {
|
||||
homedir, err := os.UserHomeDir()
|
||||
if err != nil {
|
||||
return input, fmt.Errorf("unable to convert ~ to user directory with error %+v", err)
|
||||
}
|
||||
|
||||
return strings.Replace(input, "~", homedir, 1), nil
|
||||
}
|
||||
return input, nil
|
||||
}
|
||||
|
||||
func InstructionToString(instruction LinkInstruction) string {
|
||||
return fmt.Sprintf("%s%s%s%s%s%s%s%s%s", SourceColor, instruction.Source, DefaultColor, deliminer, TargetColor, instruction.Target, DefaultColor, deliminer, strconv.FormatBool(instruction.Force))
|
||||
}
|
||||
|
||||
func GetSyncFilesRecursively(input string) ([]string, error) {
|
||||
var files []string
|
||||
err := filepath.WalkDir(input, func(path string, file fs.DirEntry, err error) error {
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// Effectively only find files named "sync" (with no extension!!)
|
||||
if !file.IsDir() && DirRegex.MatchString(path) {
|
||||
files = append(files, path)
|
||||
}
|
||||
|
||||
return nil
|
||||
})
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return files, nil
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user