Merge pull request #20 from milyin/generate_fix

in the generated file put version and publish=false

Author: milyin

prebindgen-project-root/src/lib.rs

@@ -7,14 +7,15 @@ use std::path::PathBuf;
 pub fn get_project_root() -> Result<PathBuf, &'static str> {
     let project_root = env!("PROJECT_ROOT");
     if project_root.is_empty() {
-        let error = 
-            "The crate `prebindgen-project-root` is being used as a Cargo dependency.\n\
-            Since it is not located inside your workspace, it cannot determine the path to the workspace root.\n\
-            Please add `prebindgen-project-root` as a member of your workspace and patch dependencies to use it locally.\n\n\
-            This can be done using the helper tool:\n\n\
+        let error =
+            "The crate `prebindgen-project-root` is being used as a regular Cargo dependency.\n\
+            Because it is not located within your workspace, it cannot determine the path to the workspace root.\n\
+            Please add `prebindgen-project-root` as a member of your workspace and patch your dependencies to use the local path.\n\n\
+            You can do this with the helper tool:\n\n\
             cargo install prebindgen-project-root\n\
             cargo prebindgen-project-root install <path>\n\n\
-            where `<path>` is the path to your workspace root.\n";
+            where `<path>` is the path to your workspace root.\n\n\
+            If the patch is already applied and the error persists, verify the version of the patched crate.";
         Err(error)
     } else {
         Ok(project_root.into())

prebindgen-project-root/src/main.rs

@@ -88,16 +88,22 @@ fn install(input: &Path) -> Result<()> {
     // 2) Write Cargo.toml for the local crate (library only)
     let local_cargo = local_crate_dir.join("Cargo.toml");
     if !local_cargo.exists() {
-        let cargo_toml = r#"[package]
+        // Use this binary's package version for the generated crate version.
+        let version = env!("CARGO_PKG_VERSION");
+        let cargo_toml = format!(
+            r#"[package]
 name = "prebindgen-project-root"
+version = "{version}"
 edition = "2021"
 license = "MIT OR Apache-2.0"
 description = "Utility to expose the workspace project root at build time"
+publish = false
 
 [build-dependencies]
 project-root = "0.2"
 quote = "1"
-"#;
+"#
+        );
         fs::write(&local_cargo, cargo_toml)
             .with_context(|| format!("writing {}", local_cargo.display()))?;
     }

prebindgen-project-root/tests/install_standalone.rs

@@ -166,8 +166,7 @@ fn cargo_run_and_assert_workspace(dir: &Path, pkg: Option<&str>) {
     eprintln!("[test] program printed: {}", printed);
     eprintln!("[test] expected root  : {}", expected_str);
     assert_eq!(
-        printed,
-        expected_str,
+        printed, expected_str,
         "printed workspace root does not match expected"
     );
 }