124 lines
4.9 KiB
Go
124 lines
4.9 KiB
Go
package main
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import (
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"fmt"
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"log"
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"os"
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"regexp"
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"strconv"
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"strings"
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)
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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 (instruction *LinkInstruction) String() string {
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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))
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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 (instruction *LinkInstruction) RunSync() 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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func (instruction *LinkInstruction) RunAsync(status chan (error)) {
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if !FileExists(instruction.Source) {
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status <- 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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status <- fmt.Errorf("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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}
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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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status <- 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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status <- 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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status <- 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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status <- 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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status <- 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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status <- nil
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} |