migrate integration tests to testscript

Signed-off-by: Jason Hall <jason@chainguard.dev>

tests/testscript_test.rs

@@ -0,0 +1,37 @@
+use std::path::PathBuf;
+use testscript_rs::testscript;
+
+#[test]
+fn testscripts() {
+    // Get the path to the target/debug directory
+    let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    let target_dir = manifest_dir.join("target").join("debug");
+
+    testscript::run("tests/testdata")
+        .setup(move |env| {
+            // Build krust binary
+            std::process::Command::new("cargo")
+                .args(["build", "--bin", "krust"])
+                .status()
+                .expect("Failed to build krust");
+
+            // Copy binary to test work directory so it's available in PATH
+            let krust_src = target_dir.join("krust");
+            let krust_dst = env.work_dir.join("krust");
+
+            std::fs::copy(&krust_src, &krust_dst)?;
+
+            // Make it executable
+            #[cfg(unix)]
+            {
+                use std::os::unix::fs::PermissionsExt;
+                let mut perms = std::fs::metadata(&krust_dst)?.permissions();
+                perms.set_mode(0o755);
+                std::fs::set_permissions(&krust_dst, perms)?;
+            }
+
+            Ok(())
+        })
+        .execute()
+        .unwrap();
+}