sys: do not link against native lib in doc build

the libdisplay-info native library is not available
in the docs.rs build environment.
we can just skip linking in this case as we do not
need it for building the documentation

libdisplay-info-sys/Cargo.toml

@@ -4,7 +4,7 @@ categories = ["api-bindings"]
 description = "Low-level bindings for libdisplay-info."
 documentation = "https://docs.rs/libdisplay-info-sys/"
 edition = "2021"
-version = "0.2.0"
+version = "0.2.1"
 keywords = ["libdisplay", "DisplayID", "EDID"]
 license = "MIT"
 name = "libdisplay-info-sys"

libdisplay-info-sys/build.rs

@@ -1,4 +1,11 @@
 fn main() {
+    if std::env::var("DOCS_RS").is_ok() {
+        // don't link against unavailable native lib in doc.rs builds and
+        // just assume the highest version is available
+        println!("cargo:rustc-cfg=feature=\"v0_2\"");
+        return;
+    }
+
     let deps = system_deps::Config::new().probe().unwrap();
     let native_lib = deps.get_by_name("libdisplay-info").unwrap();
     let native_version = semver::Version::parse(&native_lib.version).unwrap();

libdisplay-info/Cargo.toml

@@ -4,7 +4,7 @@ categories = ["api-bindings"]
 description = "EDID and DisplayID library."
 documentation = "https://docs.rs/libdisplay-info/"
 edition = "2021"
-version = "0.2.0"
+version = "0.2.1"
 keywords = ["libdisplay", "DisplayID", "EDID"]
 license = "MIT"
 name = "libdisplay-info"
@@ -17,7 +17,7 @@ readme = "../README.md"
 v0_2 = ["libdisplay-info-sys/v0_2"]
 
 [dependencies]
-libdisplay-info-sys = { version = "0.2.0", path = "../libdisplay-info-sys" }
+libdisplay-info-sys = { version = "0.2.1", path = "../libdisplay-info-sys" }
 libc = "0.2.155"
 thiserror = "2.0.9"
 libdisplay-info-derive = { version = "0.1.0", path = "../libdisplay-info-derive" }