Fallback to default plugin install path

.github/actions/build-manylinux/entrypoint.sh

@@ -34,7 +34,7 @@ build/codon run test/core/exit.codon || if [[ $? -ne 42 ]]; then false; fi
 
 # package
 export CODON_BUILD_ARCHIVE=codon-$(uname -s | awk '{print tolower($0)}')-$(uname -m).tar.gz
-mkdir -p codon-deploy/bin codon-deploy/lib/codon
+mkdir -p codon-deploy/bin codon-deploy/lib/codon codon-deploy/plugins
 cp build/codon codon-deploy/bin/
 cp build/libcodon*.so codon-deploy/lib/codon/
 cp build/libomp.so codon-deploy/lib/codon/

.github/workflows/ci.yml

@@ -184,7 +184,7 @@ jobs:
 
       - name: Prepare Artifacts
         run: |
-          mkdir -p codon-deploy/bin codon-deploy/lib/codon
+          mkdir -p codon-deploy/bin codon-deploy/lib/codon codon-deploy/plugins
           cp build/codon codon-deploy/bin/
           cp build/libcodon*.${LIBEXT} codon-deploy/lib/codon/
           cp build/libomp.${LIBEXT} codon-deploy/lib/codon/

codon/dsl/plugins.cpp

@@ -1,5 +1,6 @@
 #include "plugins.h"
 
+#include <cstdlib>
 #include <filesystem>
 
 #include "codon/parser/common.h"
@@ -27,7 +28,14 @@ bool PluginManager::load(const std::string &path, std::string *errMsg) {
   const std::string libExt = "so";
 #endif
 
-  fs::path tomlPath = fs::path(path) / "plugin.toml";
+  const std::string config = "plugin.toml";
+  fs::path tomlPath = fs::path(path) / config;
+  if (!fs::exists(tomlPath)) {
+    // try default install path
+    if (auto *homeDir = std::getenv("HOME"))
+      tomlPath = fs::path(homeDir) / ".codon/plugins" / path / config;
+  }
+
   toml::parse_result tml;
   try {
     tml = toml::parse_file(tomlPath.string());