Finding Java source files

docs/usage.md

@@ -102,6 +102,9 @@ Run casr-java:
 
     $ casr-java -o java.casrep -- java casr/tests/casr_tests/java/Test1.java
 
+You can specify paths to directories with source files via environment variable
+CASR\_SOURCE\_DIRECTORIES  (list separated by ':').
+
 ## casr-core
 
 Analyze coredump for security goals and provide detailed report with severity estimation

libcasr/src/report.rs

@@ -479,7 +479,30 @@ impl CrashReport {
             return None;
         }
 
-        if let Ok(file) = std::fs::File::open(&debug.file) {
+        // Search for file
+        let mut sources: Vec<PathBuf> =
+            if let Ok(sources) = std::env::var("CASR_SOURCE_DIRECTORIES") {
+                let debug_file_name = PathBuf::from(&debug.file)
+                    .file_name()
+                    .unwrap()
+                    .to_str()
+                    .unwrap()
+                    .to_string();
+                sources
+                    .split(':')
+                    .map(PathBuf::from)
+                    .filter(|x| x.is_dir())
+                    .map(|x| x.join(&debug_file_name))
+                    .collect()
+            } else {
+                Vec::new()
+            };
+        sources.push(PathBuf::from(&debug.file));
+        let Some(source_file) = sources.iter().find(|x| x.exists()) else {
+            return None;
+        };
+
+        if let Ok(file) = std::fs::File::open(source_file) {
             let file = BufReader::new(file);
             let start: usize = if debug.line > 5 {
                 debug.line as usize - 5