mirror of
https://github.com/schollz/cowyo.git
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50 lines
1.8 KiB
Go
50 lines
1.8 KiB
Go
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// Package ospath provides utilities to get OS-specific directories.
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package ospath
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import (
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"fmt"
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"os"
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"os/user"
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"path/filepath"
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"runtime"
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)
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// CacheDir tries to acquire an OS-specific app cache directory for the given importPath.
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// Cache directory contains the app's cached data that can be regenerated as needed.
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// Apps should never rely on the existence of cache files.
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//
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// It's guaranteed to be a unique directory for the importPath.
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// Before returning the directory's path, CacheDir creates the directory if it
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// doesn't already exist, so it can be used right away.
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func CacheDir(importPath string) (string, error) {
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var home string
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if u, err := user.Current(); err != nil {
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home = os.Getenv("HOME")
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if home == "" {
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return "", err
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}
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} else {
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home = u.HomeDir
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}
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// TODO: Support Windows in analogous ways. Also support mobile devices (iOS, Android).
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// Think about web? While HTML5 Local Storage could be used, it's not going to be compatible
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// with filepaths; so maybe consider returning a webdav.FileSystem or so instead? Needs consideration.
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switch {
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case runtime.GOOS == "darwin" && runtime.GOARCH == "amd64":
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dir := filepath.Join(home, "Library", "Caches", filepath.FromSlash(importPath))
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if err := os.MkdirAll(dir, 0700); err != nil {
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return "", err
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}
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return dir, nil
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case runtime.GOOS == "linux" && (runtime.GOARCH == "386" || runtime.GOARCH == "amd64"):
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// $HOME/.cache path is based on https://github.com/rsc/gt/blob/ee152ddc9ec2a99d345cf81b6ba0f40a83c9dd6f/main.go#L22.
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dir := filepath.Join(home, ".cache", filepath.FromSlash(importPath))
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if err := os.MkdirAll(dir, 0700); err != nil {
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return "", err
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}
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return dir, nil
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default:
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return "", fmt.Errorf("ospath.CacheDir not implemented for %s/%s", runtime.GOOS, runtime.GOARCH)
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}
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}
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