Add headless Linux build path

.changeset/headless_linux_build_path.md

@@ -0,0 +1,8 @@
+---
+livekit: patch
+webrtc-sys: patch
+libwebrtc: patch
+livekit-ffi: patch
+---
+
+Add headless Linux build path - #1024 (@mikefaille)

Cargo.toml

@@ -45,7 +45,7 @@ license = "Apache-2.0"
 [workspace.dependencies]
 device-info = { version = "0.1.0", path = "device-info" }
 imgproc = { version = "0.3.19", path = "imgproc" }
-libwebrtc = { version = "0.3.29", path = "libwebrtc" }
+libwebrtc = { version = "0.3.29", path = "libwebrtc", default-features = false }
 livekit = { version = "0.7.36", path = "livekit" }
 livekit-api = { version = "0.4.18", path = "livekit-api" }
 livekit-ffi = { version = "0.12.52", path = "livekit-ffi" }

examples/local_audio/Cargo.toml

@@ -9,7 +9,7 @@ tokio = { workspace = true, features = ["full"] }
 env_logger = { workspace = true }
 livekit = { workspace = true, features = ["rustls-tls-native-roots"] }
 livekit-api = { workspace = true, features = ["rustls-tls-native-roots"] }
-libwebrtc = { workspace = true }
+libwebrtc = { workspace = true, features = ["glib-main-loop"] }
 log = { workspace = true }
 cpal = "0.15"
 anyhow = { workspace = true }

examples/local_video/Cargo.toml

@@ -26,7 +26,7 @@ required-features = ["desktop"]
 tokio = { workspace = true, features = ["full", "parking_lot"] }
 livekit = { workspace = true, features = ["rustls-tls-native-roots"] }
 webrtc-sys = { workspace = true }
-libwebrtc = { workspace = true }
+libwebrtc = { workspace = true, features = ["glib-main-loop"] }
 livekit-api = { workspace = true }
 yuv-sys = { workspace = true, features = ["jpeg"] }
 futures = { workspace = true }

livekit/Cargo.toml

@@ -8,11 +8,12 @@ repository.workspace = true
 
 [features]
 # By default ws TLS is not enabled
-default = ["tokio"]
+default = ["tokio", "glib-main-loop"]
 
 async = ["livekit-api/signal-client-async"]
 tokio = ["livekit-api/signal-client-tokio"]
 dispatcher = ["livekit-api/signal-client-dispatcher"]
+glib-main-loop = ["libwebrtc/glib-main-loop"]
 
 
 # Note that the following features only change the behavior of tokio-tungstenite.

webrtc-sys/build.rs

@@ -16,17 +16,24 @@ use std::path::Path;
 use std::path::PathBuf;
 use std::{env, path, process::Command};
 
+fn lk_headless() -> bool {
+    env::var("LK_HEADLESS").map(|v| v == "1" || v.eq_ignore_ascii_case("true")).unwrap_or(false)
+}
+
 fn main() {
     if env::var("DOCS_RS").is_ok() {
         return;
     }
 
     let target_os = env::var("CARGO_CFG_TARGET_OS").unwrap();
     let target_arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
-    let is_desktop = target_os == "linux" || target_os == "windows" || target_os == "macos";
+    let headless_linux = target_os == "linux" && lk_headless();
+    let is_desktop =
+        (target_os == "linux" || target_os == "windows" || target_os == "macos") && !headless_linux;
 
     println!("cargo:rerun-if-env-changed=LK_DEBUG_WEBRTC");
     println!("cargo:rerun-if-env-changed=LK_CUSTOM_WEBRTC");
+    println!("cargo:rerun-if-env-changed=LK_HEADLESS");
 
     let mut rust_files = vec![
         "src/peer_connection.rs",
@@ -166,20 +173,22 @@ fn main() {
             println!("cargo:rustc-link-lib=dylib=pthread");
             println!("cargo:rustc-link-lib=dylib=m");
 
-            // In order to avoid any ABI mismatches we use the sysroot's headers.
-            add_gio_headers(&mut builder);
+            if !headless_linux {
+                // In order to avoid any ABI mismatches we use the sysroot's headers.
+                add_gio_headers(&mut builder);
 
-            for lib_name in ["glib-2.0", "gobject-2.0", "gio-2.0"] {
-                pkg_config::probe_library(lib_name).unwrap();
-            }
+                for lib_name in ["glib-2.0", "gobject-2.0", "gio-2.0"] {
+                    pkg_config::probe_library(lib_name).unwrap();
+                }
 
-            add_lazy_load_so(
-                &mut builder,
-                "desktop_capturer",
-                ["drm", "gbm", "X11", "Xfixes", "Xdamage", "Xrandr", "Xcomposite", "Xext"]
-                    .map(String::from)
-                    .to_vec(),
-            );
+                add_lazy_load_so(
+                    &mut builder,
+                    "desktop_capturer",
+                    ["drm", "gbm", "X11", "Xfixes", "Xdamage", "Xrandr", "Xcomposite", "Xext"]
+                        .map(String::from)
+                        .to_vec(),
+                );
+            }
 
             let x86 = target_arch == "x86_64" || target_arch == "i686";
             let arm = target_arch == "aarch64" || target_arch.contains("arm");