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There was only the `internal/util` package, but the functions were well suited for task runners that can be implemented by users to extend snowsaw's capability to handle custom tasks. To allow to use the utility functions the package has been moved to the `pkg/util` parent package. Epic GH-33 Resolves GH-66
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| // Copyright (C) 2017-present Arctic Ice Studio <[email protected]> | ||
| // Copyright (C) 2017-present Sven Greb <[email protected]> | ||
| // | ||
| // Project: snowsaw | ||
| // Repository: https://github.com/arcticicestudio/snowsaw | ||
| // License: MIT | ||
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| // Author: Arctic Ice Studio <[email protected]> | ||
| // Author: Sven Greb <[email protected]> | ||
| // Since: 0.4.0 | ||
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| // Package filesystem provides utility functions related to filesystem actions. | ||
| package filesystem | ||
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| import ( | ||
| "fmt" | ||
| "os" | ||
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| "github.com/mitchellh/go-homedir" | ||
| ) | ||
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| // DirExists checks if the directory at the path exists and is not a file. | ||
| // Returns true if the given path exists and is a directory, false otherwise. | ||
| // If an error occurs, false is returned along with the error. | ||
| func DirExists(path string) (bool, error) { | ||
| info, err := os.Stat(path) | ||
| if err == nil && info.IsDir() { | ||
| return true, nil | ||
| } | ||
| if os.IsNotExist(err) { | ||
| return false, nil | ||
| } | ||
| if !info.IsDir() { | ||
| return false, fmt.Errorf("%s is a file", path) | ||
| } | ||
|
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| return false, err | ||
| } | ||
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| // ExpandPath expands environment variables and special elements like the tilde character for the given path. | ||
| // If an error occurs the original passed path is returned along with the corresponding error. | ||
| func ExpandPath(path string) (string, error) { | ||
| // Handle special case for Unix tilde character expansion. | ||
| expandedUserHomePath, err := homedir.Expand(path) | ||
| if err != nil { | ||
| return path, err | ||
| } | ||
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| return os.ExpandEnv(expandedUserHomePath), nil | ||
| } | ||
|
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| // FileExists checks if the file at the given path exists and is not a directory. | ||
| // If an error occurs, false is returned along with the corresponding error. | ||
| func FileExists(path string) (bool, error) { | ||
| info, err := os.Stat(path) | ||
| if err == nil && !info.IsDir() { | ||
| return true, nil | ||
| } | ||
| if os.IsNotExist(err) { | ||
| return false, nil | ||
| } | ||
| if info.IsDir() { | ||
| return false, fmt.Errorf("%s is a directory", path) | ||
| } | ||
|
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| return false, err | ||
| } | ||
|
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| // IsFileWritable checks if the file at the given path is writable. | ||
| // If an error occurs, false is returned along with the corresponding error. | ||
| func IsFileWritable(path string) (bool, error) { | ||
| _, err := os.OpenFile(path, os.O_WRONLY, 0660) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
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| return true, nil | ||
| } | ||
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| // IsSymlink checks if the specified path is a symbolic link. | ||
| // If an error occurs, false is returned along with the corresponding error. | ||
| func IsSymlink(path string) (bool, error) { | ||
| fi, err := os.Lstat(path) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
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| return fi.Mode()&os.ModeSymlink == os.ModeSymlink, nil | ||
| } | ||
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| // NodeExists checks if the node at the given path exists. | ||
| // If an error occurs, false is returned along with the corresponding error. | ||
| func NodeExists(path string) (bool, error) { | ||
| _, err := os.Stat(path) | ||
| if err == nil { | ||
| return true, nil | ||
| } | ||
| if os.IsNotExist(err) { | ||
| return false, nil | ||
| } | ||
|
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| return false, err | ||
| } |