using DOCS_RS to detect docsrs

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "ng-rocksdb"
 description = "Rust wrapper for Facebook's RocksDB embeddable database, fork for Nextgraph.org"
-version = "0.21.0-ngpreview.2"
+version = "0.21.0-ngpreview.3"
 edition = "2018"
 rust-version = "1.60"
 authors = ["Tyler Neely <t@jujit.su>", "David Greenberg <dsg123456789@gmail.com>"]

librocksdb-sys/build.rs

@@ -438,6 +438,7 @@ fn cxx_standard() -> String {
     })
 }
 
+#[allow(dead_code)]
 fn update_submodules() {
     let program = "git";
     let dir = "../";
@@ -461,6 +462,9 @@ fn update_submodules() {
 fn main() {
     if !Path::new("librocksdb-sys/rocksdb/AUTHORS").exists() {
         println!("cargo:rustc-cfg=NG_ROCKS_DB_NOT_FOUND");
+        if std::env::var("DOCS_RS").is_ok() {
+            println!("cargo:rustc-cfg=DOCS_RS");
+        }
         return;
         //update_submodules();
     }

src/lib.rs

@@ -71,8 +71,9 @@
     clippy::missing_panics_doc,
     clippy::from_over_into,
 )]
+#![cfg(not(DOCS_RS))]
 
-#[cfg(all(not(docsrs), NG_ROCKS_DB_NOT_FOUND))]
+#[cfg(all(not(DOCS_RS), NG_ROCKS_DB_NOT_FOUND))]
 std::compile_error!("empty librocksdb-sys/rocksdb directory");
 
 #[macro_use]