82 lines
1.6 KiB
Go
82 lines
1.6 KiB
Go
package daemon
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import (
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"errors"
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"fmt"
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"io/fs"
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"os"
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"path/filepath"
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"slices"
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"strings"
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"sync"
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)
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func getDefaultHTTPSocketDirPath() string {
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path, err := firstExistingDir(
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"/tmp",
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// TODO it's possible the daemon process can't actually write to these
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"/run",
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"/var/run",
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"/dev/shm",
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)
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if err != nil {
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panic(fmt.Sprintf("Failed to find directory for HTTP socket: %v", err))
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}
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return path
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}
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// HTTPSocketPath returns the path to the daemon's HTTP socket which is used for
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// RPC and other functionality.
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var HTTPSocketPath = sync.OnceValue(func() string {
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return envOr(
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"ISLE_DAEMON_HTTP_SOCKET_PATH",
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func() string {
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return filepath.Join(
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getDefaultHTTPSocketDirPath(), "isle-daemon.sock",
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)
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},
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)
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})
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////////////////////////////////////////////////////////////////////////////////
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// Jigs
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func envOr(name string, fallback func() string) string {
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if v := os.Getenv(name); v != "" {
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return v
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}
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return fallback()
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}
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func firstExistingDir(paths ...string) (string, error) {
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var errs []error
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for _, path := range paths {
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stat, err := os.Stat(path)
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switch {
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case errors.Is(err, fs.ErrExist):
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continue
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case err != nil:
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errs = append(
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errs, fmt.Errorf("checking if path %q exists: %w", path, err),
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)
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case !stat.IsDir():
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errs = append(
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errs, fmt.Errorf("path %q exists but is not a directory", path),
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)
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default:
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return path, nil
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}
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}
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err := fmt.Errorf(
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"no directory found at any of the following paths: %s",
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strings.Join(paths, ", "),
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)
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if len(errs) > 0 {
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err = errors.Join(slices.Insert(errs, 0, err)...)
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}
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return "", err
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}
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