46 lines
1.0 KiB
Go
46 lines
1.0 KiB
Go
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package daecommon
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import (
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"os"
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"path/filepath"
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"sync"
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"github.com/adrg/xdg"
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)
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// EnvVars are variables which are derived based on the environment which the
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// process is running in.
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type EnvVars struct {
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RuntimeDirPath string
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StateDirPath string
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}
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// GetEnvVars will return the EnvVars of the current processes, as determined by
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// the process's environment.
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var GetEnvVars = sync.OnceValue(func() (v EnvVars) {
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// RUNTIME_DIRECTORY/STATE_DIRECTORY are used by the systemd service in
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// conjunction with the RuntimeDirectory/StateDirectory directives.
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v.RuntimeDirPath = envOr(
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"RUNTIME_DIRECTORY",
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func() string { return filepath.Join(xdg.RuntimeDir, "isle") },
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)
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v.StateDirPath = envOr(
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"STATE_DIRECTORY",
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func() string { return filepath.Join(xdg.StateHome, "isle") },
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)
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return
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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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