From 2acae17fc235dce288c186d04b4f0750bdecc198 Mon Sep 17 00:00:00 2001
From: Jonas Maier <jonas@x77.dev>
Date: Thu, 14 May 2026 17:12:18 +0200
Subject: automatically set XDG_ variables for child processes

---
 src/run/var.rs | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

(limited to 'src/run/var.rs')

diff --git a/src/run/var.rs b/src/run/var.rs
index d3e98f4..8e22f5c 100644
--- a/src/run/var.rs
+++ b/src/run/var.rs
@@ -1,5 +1,6 @@
 use std::borrow::Cow;
 use std::collections::{HashMap, HashSet};
+use std::os::unix::ffi::OsStrExt;
 use std::sync::LazyLock;
 use std::time::Instant;
 
@@ -19,7 +20,10 @@ impl Vars {
         magic: HashMap<BString, fn() -> BString>,
     ) -> Self {
         for (var, val) in std::env::vars_os() {
-            simple.insert(var.into_encoded_bytes(), val.into_encoded_bytes());
+            // explicitly added variables get priority.
+            if !simple.contains_key(var.as_bytes()) {
+                simple.insert(var.into_encoded_bytes(), val.into_encoded_bytes());
+            }
         }
         let all = simple
             .keys()
@@ -87,10 +91,15 @@ macro_rules! map {
 
 impl Default for Vars {
     fn default() -> Self {
+        use crate::basedir::xdg;
+
         let simple = map! {
             b"PISH_VERSION" => crate::consts::PISH_VERSION.as_bytes().to_vec(),
             b"PISH_COMMIT" => crate::consts::PISH_COMMIT.as_bytes().to_vec(),
             b"PISH_DIRTY" => vec![crate::consts::PISH_DIRTY as u8 + b'0'],
+            xdg::DATA_HOME => xdg::data_home().as_os_str().as_bytes().to_vec(),
+            xdg::STATE_HOME => xdg::state_home().as_os_str().as_bytes().to_vec(),
+            xdg::CONFIG_HOME => xdg::config_home().as_os_str().as_bytes().to_vec(),
         };
 
         let magic = map! {
@@ -101,7 +110,13 @@ impl Default for Vars {
         // call it once such that lazylock gets initialized
         seconds_since_startup();
 
-        Self::new(simple, magic)
+        let mut this = Self::new(simple.clone(), magic);
+        for var in simple.keys() {
+            if var.starts_with(b"XDG_") {
+                this.allow_export(var, true);
+            }
+        }
+        this
     }
 }
 
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