From 4d16797051ede0b1ac7c8ba409637a7a6ac8c66e Mon Sep 17 00:00:00 2001
From: Daylin Morgan <me@dayl.in>
Date: Tue, 11 Feb 2025 10:24:20 -0600
Subject: [PATCH] capture the output

---
 pkgs/oizys/src/oizys/nix.nim | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/pkgs/oizys/src/oizys/nix.nim b/pkgs/oizys/src/oizys/nix.nim
index a15076f..f38ceb8 100644
--- a/pkgs/oizys/src/oizys/nix.nim
+++ b/pkgs/oizys/src/oizys/nix.nim
@@ -316,6 +316,11 @@ type
   BuildResult = object
     duration*: Duration
     successful*: bool
+    stdout*: string
+    stderr*: string
+
+proc show(br: BuildResult) =
+  error "\n" & formatStdoutStderr(br.stdout, br.stderr)
 
 func formatDuration(d: Duration): string =
   ## convert duration to: X minutes and Y seconds
@@ -331,13 +336,16 @@ proc build(path: string, drv: NixDerivation, rest: seq[string]): BuildResult =
   var cmd = "nix build"
   cmd.addArgs path & "^*", "--no-link"
   cmd.addArgs rest
-  let buildCode = runCmd(cmd)
+  let (stdout, stderr, buildCode) = runCmdCapt(cmd, {CaptStdout, CaptStderr})
   result.duration = now() - startTime
+  result.stdout = stdout
+  result.stderr = stderr
   if buildCode == 0:
     result.successful = true
     info "succesfully built: " & splitDrv(path).name
   else:
-    warn "failed to build: " & splitDrv(path).name
+    error "failed to build: " & splitDrv(path).name
+    show result
   info "-> duration: " & formatDuration(result.duration)
 
 func outputsPaths(drv: NixDerivation): seq[string] =