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package app
import (
"strconv"
"hakurei.app/container"
"hakurei.app/hst"
)
// EnvPaths holds paths copied from the environment and is used to create [hst.Paths].
type EnvPaths struct {
// TempDir is returned by [os.TempDir].
TempDir *container.Absolute
// RuntimePath is copied from $XDG_RUNTIME_DIR.
RuntimePath *container.Absolute
}
// Copy expands [EnvPaths] into [hst.Paths].
func (env *EnvPaths) Copy(v *hst.Paths, userid int) {
if env == nil || env.TempDir == nil || v == nil {
panic("attempting to use an invalid EnvPaths")
}
v.TempDir = env.TempDir
v.SharePath = env.TempDir.Append("hakurei." + strconv.Itoa(userid))
if env.RuntimePath == nil {
// fall back to path in share since hakurei has no hard XDG dependency
v.RunDirPath = v.SharePath.Append("run")
v.RuntimePath = v.RunDirPath.Append("compat")
} else {
v.RuntimePath = env.RuntimePath
v.RunDirPath = env.RuntimePath.Append("hakurei")
}
}
// CopyPaths returns a populated [EnvPaths].
func CopyPaths() *EnvPaths { return copyPaths(direct{}) }
// copyPaths returns a populated [EnvPaths].
func copyPaths(k syscallDispatcher) *EnvPaths {
const xdgRuntimeDir = "XDG_RUNTIME_DIR"
var env EnvPaths
if tempDir, err := container.NewAbs(k.tempdir()); err != nil {
k.fatalf("invalid TMPDIR: %v", err)
panic("unreachable")
} else {
env.TempDir = tempDir
}
r, _ := k.lookupEnv(xdgRuntimeDir)
if a, err := container.NewAbs(r); err == nil {
env.RuntimePath = a
}
return &env
}
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