test: ensure apt *and* python c extensions work properly

examples/python-numpy/main.py

@@ -1,5 +1,7 @@
+import sys
 import numpy as np
 import pandas as pd
+import subprocess
 
 print(np)
 print(pd)
@@ -8,3 +10,10 @@
 print(arr)
 
 print("Hello from Python numpy and pandas")
+
+# with the wrong LD_LIBRARY_PATH, this will fail with a GLIBC version mismatch
+result = subprocess.run(["apt", "--version"], capture_output=True, text=True)
+print(result.stdout)
+
+# fail if subprocess fails!
+sys.exit(result.returncode)

src/providers/python.rs

@@ -142,8 +142,15 @@ impl PythonProvider {
         let mut setup = Phase::setup(Some(pkgs));
 
         // Many Python packages need some C headers to be available
-        // stdenv.cc.cc.lib -> https://discourse.nixos.org/t/nixos-with-poetry-installed-pandas-libstdc-so-6-cannot-open-shared-object-file/8442/3
-        setup.add_pkgs_libs(vec!["zlib".to_string(), "stdenv.cc.cc.lib".to_string()]);
+        //
+        //   - https://discourse.nixos.org/t/nixos-with-poetry-installed-pandas-libstdc-so-6-cannot-open-shared-object-file/8442/3
+        //   - https://github.com/mcdonc/.nixconfig/blob/e7885ad18b7980f221e59a21c91b8eb02795b541/videos/pydev/script.rst
+        //
+        // Some packages (like stdenv.cc.cc.lib) may conflict with other system commands and cause libc version conflicts
+        // since LD_LIBRARY_PATH is mutated by `add_pkgs_libs`
+        //
+
+        setup.add_pkgs_libs(vec!["zlib".to_string()]);
         setup.add_nix_pkgs(&[Pkg::new("gcc")]);
 
         Ok(Some(setup))

tests/docker_run_tests.rs

@@ -97,6 +97,8 @@ async fn run_image(name: &str, cfg: Option<Config>) -> String {
         }
     };
 
+    assert!(_status_code == Some(0), "Failed to run image successfully");
+
     let reader = BufReader::new(child.stdout.unwrap());
     reader
         .lines()
@@ -771,6 +773,7 @@ async fn test_python_numpy() {
     let name = simple_build("./examples/python-numpy").await;
     let output = run_image(&name, None).await;
     assert!(output.contains("Hello from Python numpy and pandas"));
+    assert!(output.contains("apt is a commandline package manager"));
 }
 
 #[tokio::test]