From 244992f35bef5b53338bdc422d60924c7d7980c5 Mon Sep 17 00:00:00 2001
From: Daylin Morgan <me@dayl.in>
Date: Mon, 17 Feb 2025 12:33:15 -0600
Subject: [PATCH] add --system to `oizys output`

---
 pkgs/oizys/src/oizys.nim     | 13 +++++++++----
 pkgs/oizys/src/oizys/nix.nim |  6 ++++++
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/pkgs/oizys/src/oizys.nim b/pkgs/oizys/src/oizys.nim
index 86940b3..083182b 100644
--- a/pkgs/oizys/src/oizys.nim
+++ b/pkgs/oizys/src/oizys.nim
@@ -138,12 +138,17 @@ hwylCli:
     ... "nixos config attr"
     flags:
       ^minimal
+      system:
+        ? "show system path"
     run:
-      if not minimal:
-        echo nixosConfigAttrs().join(" ")
-      else:
+      if minimal and system:
+        echo "--minimal and --system are mutually exclusive"
+      elif minimal:
         showOizysDerivations()
-
+      elif system:
+        echo getSystemPaths().mapIt(it & "^*").join(" ")
+      else:
+        echo nixosConfigAttrs().join(" ")
     [update]
     ... "update and run nixos-rebuild"
     flags:
diff --git a/pkgs/oizys/src/oizys/nix.nim b/pkgs/oizys/src/oizys/nix.nim
index 7fba440..2a4fdb7 100644
--- a/pkgs/oizys/src/oizys/nix.nim
+++ b/pkgs/oizys/src/oizys/nix.nim
@@ -198,6 +198,7 @@ proc nixDerivationShow*(drvs: openArray[string]): Table[string, NixDerivation] =
     runCmdCaptWithSpinner(cmd, "evaluating " & drvs.join(" "))
   fromJson(output, Table[string, NixDerivation])
 
+
 # TODO: replace asserts in this proc, would be easier with results type
 proc findSystemPaths(drvs: Table[string, NixDerivation]): seq[string] =
   let hosts = getHosts()
@@ -214,6 +215,10 @@ proc findSystemPaths(drvs: Table[string, NixDerivation]): seq[string] =
 
   assert len(hosts) == len(result)
 
+# NOTE: is find system paths always called after a nixDerivationShow?
+proc getSystemPaths*(): seq[string] =
+  let systemDrvs = nixDerivationShow(nixosConfigAttrs())
+  result = findSystemPaths(systemDrvs)
 
 proc filterSeq(
   drvs: seq[string],
@@ -240,6 +245,7 @@ func isIgnored(drv: string): bool =
 proc getSystemPathDrvs*(): seq[string] =
   let systemDrvs = nixDerivationShow(nixosConfigAttrs())
   let systemPathDrvs = findSystemPaths(systemDrvs)
+
   result =
     collect:
       for k, drv in nixDerivationShow(systemPathDrvs):