From 4bfab60ac641860a86836e110e2807b3b0717101 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ibrahim=20Numanagic=CC=81?= <ibrahimpasa@gmail.com>
Date: Fri, 25 Feb 2022 09:19:35 -0800
Subject: [PATCH] Fix getAbsolutePath (use POSIX realpath)

---
 codon/parser/common.cpp | 9 ++++++---
 codon/parser/common.h   | 2 +-
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/codon/parser/common.cpp b/codon/parser/common.cpp
index e0e574a8..34e9a519 100644
--- a/codon/parser/common.cpp
+++ b/codon/parser/common.cpp
@@ -247,9 +247,12 @@ ImportFile getRoot(const std::string argv0, const std::vector<std::string> &plug
 } // namespace
 
 std::string getAbsolutePath(const std::string &path) {
-  llvm::SmallString<128> p(path);
-  llvm::sys::fs::make_absolute(p);
-  return std::string(p);
+  char *c = realpath(path.c_str(), nullptr);
+  if (!c)
+    return path;
+  std::string result(c);
+  free(c);
+  return result;
 }
 
 std::shared_ptr<ImportFile> getImportFile(const std::string &argv0,
diff --git a/codon/parser/common.h b/codon/parser/common.h
index 568ab875..4978e64b 100644
--- a/codon/parser/common.h
+++ b/codon/parser/common.h
@@ -167,7 +167,7 @@ template <typename T> std::vector<T> clone_nop(const std::vector<T> &t) {
 
 /// Path utilities
 
-/// @return The absolute path of a given path.
+/// @return The absolute canonical path of a given path.
 std::string getAbsolutePath(const std::string &path);
 
 /// Detect a absolute path of the current executable (whose argv0 is known).