Modular Services: Difference between revisions

@@ Line 7: / Line 7: @@
 == Do's ==
-== Do not Do's ==
+== Do not's ==
+=== Depend on anything already being in $PATH ===
+Don't expect any programs to be available, not even GNU coreutils.
+Start the services program using a full path and if you need to write a script then set PATH there.
+Setting a $PATH with a shell script:
+<syntaxHighlight lang=nix>
+{
+  process.argv = [
+    (pkgs.writeShellScript "foo.sh" ''
+      PATH="${lib.makeBinPath [ pkgs.foo pkgs.bar pkgs.coreutils ]}"
+      mkdir /var/lib/foo
+      foo …
+    '')
+  ];
+}
+</syntaxHighlight>
+Or set PATH without a script using [[execline]]:
+<syntaxHighlight lang=nix>
+{
+  process.argv = [
+    "${pkgs.execline}/bin/export" "PATH" (lib.makeBinPath [ pkgs.foo pkgs.bar ])
+    "foo" "…"
+  ];
+}
+</syntaxHighlight>
 == Research Topics ==