pkgs/device-templates: make executable and wrap scripts

nix/pkgs/device-templates.nix

@@ -16,9 +16,21 @@ let
     );
   expandTemplate = name: template: data:
     self.lib.expandSaltTemplate name (replaceNetmasks template) data;
+  wrapNixShell = script:
+    pkgs.runCommand (builtins.baseNameOf script) {
+      src = script;
+    } ''
+      (
+        echo '#! /usr/bin/env nix-shell'
+        echo '#! nix-shell -i "expect -f" -p expect telnet'
+        cat $src
+      ) > $out
+      chmod a+x $out
+    '';
 
   device-scripts =
     builtins.mapAttrs (hostname: { role, model, ... }:
+      wrapNixShell (
         expandTemplate "${hostname}.sh" (templates role model) ({
           inherit hostname;
           pillar = config.salt-pillar;
@@ -29,9 +41,12 @@ let
         } // optionalAttrs (config.salt-pillar.cpe ? ${hostname}) {
           conf = config.salt-pillar.cpe.${hostname};
         })
-    ) (filterAttrs (_: { role, ... }:
+      )
+    ) (
+      filterAttrs (_: { role, ... }:
         role == "ap" || role == "switch"
-    ) config.site.hosts);
+      ) config.site.hosts
+    );
 
   all-device-scripts =
     pkgs.runCommandLocal "all-device-scripts" {} (
@@ -40,6 +55,7 @@ let
 
         substitute ${./ap_install_collectd.sh} $out/bin/ap_install_collectd.sh \
           --replace "{{STATS}}" "${config.site.net.serv.hosts6.dn42.stats}"
+        chmod a+x $out/bin/ap_install_collectd.sh
       '' +
       builtins.concatStringsSep "\n" (
         map (hostname: