Improvements to has_backtrace_depending_on_env (#277)

* Move has_backtrace out of test and into examples

* Fix has_backtrace_depending_on_env path for release builds

Author: palfrey

build.rs

@@ -1,5 +1,6 @@
 extern crate version_check;
 
+use std::env;
 use version_check::is_min_version;
 
 fn main() {
@@ -8,4 +9,9 @@ fn main() {
     if is_min_version("1.30").unwrap_or(false) {
         println!("cargo:rustc-cfg=has_error_source");
     }
+
+    // So we can get the build profile for has_backtrace_depending_on_env test
+    if let Ok(profile) = env::var("PROFILE") {
+        println!("cargo:rustc-cfg=build={:?}", profile);
+    }
 }

src/bin/has_backtrace.rs renamed to examples/has_backtrace.rs

@@ -199,13 +199,21 @@ fn empty() {
 #[test]
 #[cfg(feature = "backtrace")]
 fn has_backtrace_depending_on_env() {
-    use std::path::Path;
+    use std::path::PathBuf;
     use std::process::Command;
 
+    let cmd_folder = if cfg!(build="debug") {
+        "debug"
+    } else if cfg!(build="release") {
+        "release"
+    } else {
+        panic!("Unknown build config");
+    };
+
     let cmd_path = if cfg!(windows) {
-        Path::new("./target/debug/has_backtrace.exe")
+        PathBuf::from(format!("./target/{}/examples/has_backtrace.exe", cmd_folder))
     } else {
-        Path::new("./target/debug/has_backtrace")
+        PathBuf::from(format!("./target/{}/examples/has_backtrace", cmd_folder))
     };
     let mut cmd = Command::new(cmd_path);