Refactor our build.rs files

crates/re_build_tools/src/lib.rs

@@ -57,6 +57,13 @@ pub(crate) fn should_output_cargo_build_instructions() -> bool {
     OUTPUT_CARGO_BUILD_INSTRUCTIONS.load(Ordering::Relaxed)
 }
 
+/// Are we running inside the workspace of <https://github.com/rerun-io/rerun> ?
+///
+/// Otherwise we might be running on users machines.
+pub fn is_in_rerun_workspace() -> bool {
+    is_tracked_env_var_set("IS_IN_RERUN_WORKSPACE")
+}
+
 /// Call from the `build.rs` file of any crate you want to generate build info for.
 ///
 /// Use this crate together with the `re_build_info` crate.

crates/re_build_tools/src/rebuild_detector.rs

@@ -15,7 +15,7 @@ use crate::should_output_cargo_build_instructions;
 /// This will work even if the package depends on crates that are outside of the workspace,
 /// included with `path = …`
 pub fn rebuild_if_crate_changed(pkg_name: &str) {
-    if !is_tracked_env_var_set("IS_IN_RERUN_WORKSPACE") {
+    if !crate::is_in_rerun_workspace() {
         // Only run if we are in the rerun workspace, not on users machines.
         return;
     }

crates/re_renderer/build.rs

@@ -109,7 +109,7 @@ fn main() {
         // repository.
         return;
     }
-    if !is_tracked_env_var_set("IS_IN_RERUN_WORKSPACE") {
+    if !re_build_tools::is_in_rerun_workspace() {
         // Only run if we are in the rerun workspace, not on users machines.
         return;
     }

crates/re_types/build.rs

@@ -37,7 +37,7 @@ fn main() {
         return;
     }
 
-    if !is_tracked_env_var_set("IS_IN_RERUN_WORKSPACE") {
+    if !re_build_tools::is_in_rerun_workspace() {
         // Only run if we are in the rerun workspace, not on users machines.
         return;
     }

crates/re_types_builder/build.rs

@@ -21,7 +21,7 @@ fn main() {
         return;
     }
 
-    if !is_tracked_env_var_set("IS_IN_RERUN_WORKSPACE") {
+    if !re_build_tools::is_in_rerun_workspace() {
         // Only run if we are in the rerun workspace, not on users machines.
         return;
     }

crates/re_viewer/build.rs

@@ -231,7 +231,7 @@ fn write_examples_manifest() -> Result<()> {
 }
 
 fn write_examples_manifest_if_necessary() {
-    if !re_build_tools::is_tracked_env_var_set("IS_IN_RERUN_WORKSPACE")
+    if !re_build_tools::is_in_rerun_workspace()
         || re_build_tools::is_tracked_env_var_set("RERUN_IS_PUBLISHING")
     {
         return;

crates/re_web_viewer_server/build.rs

@@ -5,7 +5,7 @@ use re_build_tools::{
 };
 
 fn main() {
-    if !is_tracked_env_var_set("IS_IN_RERUN_WORKSPACE") {
+    if !re_build_tools::is_in_rerun_workspace() {
         // Only run if we are in the rerun workspace, not on users machines.
         return;
     }

examples/rust/objectron/build.rs

@@ -1,14 +1,14 @@
 use std::path::PathBuf;
 
-use re_build_tools::{is_tracked_env_var_set, write_file_if_necessary};
+use re_build_tools::write_file_if_necessary;
 
 fn main() -> Result<(), std::io::Error> {
     if std::env::var("CI").is_ok() {
         // No need to run this on CI (which means setting up `protoc` etc) since the code is committed
         // anyway.
         return Ok(());
     }
-    if !is_tracked_env_var_set("IS_IN_RERUN_WORKSPACE") {
+    if !re_build_tools::is_in_rerun_workspace() {
         // Only run if we are in the rerun workspace, not on users machines (if we ever publish the example).
         return Ok(());
     }