From a75e3b1bcd198bfd1b2ce4670d9996d938a8ea99 Mon Sep 17 00:00:00 2001
From: Lucas Nogueira <lucas@tauri.app>
Date: Sat, 28 Feb 2026 10:04:00 -0300
Subject: [PATCH] feat(cli): include stderr in command error

---
 .changes/include-stderr-error.md      | 7 +++++++
 crates/tauri-bundler/src/utils/mod.rs | 7 ++++---
 crates/tauri-cli/src/lib.rs           | 8 ++++----
 3 files changed, 15 insertions(+), 7 deletions(-)
 create mode 100644 .changes/include-stderr-error.md

diff --git a/.changes/include-stderr-error.md b/.changes/include-stderr-error.md
new file mode 100644
index 000000000..45dae762c
--- /dev/null
+++ b/.changes/include-stderr-error.md
@@ -0,0 +1,7 @@
+---
+"@tauri-apps/cli": patch:enhance
+"tauri-cli": patch:enhance
+"tauri-bundler": patch:enhance
+---
+
+When a captured command fails, include its stderr in the error message.
diff --git a/crates/tauri-bundler/src/utils/mod.rs b/crates/tauri-bundler/src/utils/mod.rs
index 87f39c4da..21c3843bb 100644
--- a/crates/tauri-bundler/src/utils/mod.rs
+++ b/crates/tauri-bundler/src/utils/mod.rs
@@ -102,9 +102,10 @@ impl CommandExt for Command {
     if output.status.success() {
       Ok(output)
     } else {
-      Err(crate::Error::GenericError(format!(
-        "failed to run {program}"
-      )))
+      Err(crate::Error::CommandFailed {
+        command: program,
+        error: std::io::Error::other(String::from_utf8_lossy(&output.stderr).to_string()),
+      })
     }
   }
 }
diff --git a/crates/tauri-cli/src/lib.rs b/crates/tauri-cli/src/lib.rs
index 186ef0ef8..9f301a08b 100644
--- a/crates/tauri-cli/src/lib.rs
+++ b/crates/tauri-cli/src/lib.rs
@@ -411,10 +411,10 @@ impl CommandExt for Command {
     if output.status.success() {
       Ok(output)
     } else {
-      crate::error::bail!(
-        "failed to run command `{cmdline}`: command exited with status code {}",
-        output.status.code().unwrap_or(-1)
-      );
+      Err(crate::error::Error::CommandFailed {
+        command: cmdline,
+        error: std::io::Error::other(String::from_utf8_lossy(&output.stderr).to_string()),
+      })
     }
   }
 }