license should be from relative dir

Author: gilescope

src/config/config_type.rs

@@ -390,7 +390,7 @@ macro_rules! create_config {
                 if self.was_set().license_template_path() {
                     let lt_path = self.license_template_path();
                     if lt_path.len() > 0 {
-                        match license::load_and_compile_template(&lt_path) {
+                        match license::load_and_compile_template(self.get_ignore(), &lt_path) {
                             Ok(re) => self.license_template = Some(re),
                             Err(msg) => eprintln!("Warning for license template file {:?}: {}",
                                                 lt_path, msg),

src/config/license.rs

@@ -211,7 +211,16 @@ impl TemplateParser {
     }
 }
 
-pub(crate) fn load_and_compile_template(path: &str) -> Result<Regex, LicenseError> {
+pub(crate) fn load_and_compile_template(base_dir: &str, path: &str) -> Result<Regex, LicenseError> {
+    let mut path = Path(path);
+    if path.is_relative() {
+        // The tempate path needs to be resolved relative to the .rustfmt config file
+        // rather than whatever dir cargo fmt was run from.
+        let current = std::env::current_dir().expect("pwd");
+        std::env::set_current_dir(base_dir);
+        path = path.canonicalize();
+        std::env::set_current_dir(current).expect("change pwd");
+    }
     let mut lt_file = File::open(&path)?;
     let mut lt_str = String::new();
     lt_file.read_to_string(&mut lt_str)?;