Build script: search Nginx folder based on CARGO_TARGET_DIR as well

Author: gabioprisan

nginx_module/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "nginx_module"
-version = "0.1.1"
+version = "0.1.2"
 edition = "2021"
 build = "build.rs"
 authors = ["Gabriel Oprisan <gabriel.oprisan@gcore.com>"]

nginx_module/build.rs

@@ -104,6 +104,16 @@ fn search_nginx_root_folder() -> String {
         }
     }
 
+    let target_dir = std::env::var("CARGO_TARGET_DIR");
+    if let Ok(target_dir) = target_dir.as_ref() {
+        for base in base_locations {
+            let folder = format!("{target_dir}/{base}");
+            if check_nginx_root(Path::new(&folder)) {
+                return folder;
+            }
+        }
+    }
+
     // If we are not a nginx submodule, try to find the folder side by side
     for base in base_locations {
         let base = format!("{manifest_dir}/{base}");
@@ -117,6 +127,20 @@ fn search_nginx_root_folder() -> String {
         }
     }
 
+    if let Ok(target_dir) = target_dir {
+        for base in base_locations {
+            let base = format!("{target_dir}/{base}");
+            for entry in std::fs::read_dir(base)
+                .expect("Cannot read directory")
+                .flatten()
+            {
+                if entry.path().is_dir() && check_nginx_root(&entry.path()) {
+                    return entry.path().to_str().unwrap().to_owned();
+                }
+            }
+        }
+    }
+
     panic!("We need to generate the Rust bindings from the Nginx header files but the Nginx folder cannot be found. Please git clone the nginx repo in any of these locations relative to this folder: {base_locations:?}");
 }