From 8bf3e9faab6dfb04d676a5ea413530cdee09744c Mon Sep 17 00:00:00 2001
From: Tim Dettmers <tim.dettmers@gmail.com>
Date: Mon, 1 Aug 2022 19:22:41 -0700
Subject: Added full env variable search; CONDA_PREFIX priority.

---
 bitsandbytes/cuda_setup.py | 54 ++++++++++++++++++++++++----------------------
 1 file changed, 28 insertions(+), 26 deletions(-)

(limited to 'bitsandbytes/cuda_setup.py')

diff --git a/bitsandbytes/cuda_setup.py b/bitsandbytes/cuda_setup.py
index 05d4c7f..59e90e4 100644
--- a/bitsandbytes/cuda_setup.py
+++ b/bitsandbytes/cuda_setup.py
@@ -19,11 +19,11 @@ evaluation:
 """
 
 import ctypes
-from os import environ as env
+import os
 from pathlib import Path
 from typing import Set, Union
 
-from .utils import print_err, warn_of_missing_prerequisite
+from .utils import print_err, warn_of_missing_prerequisite, execute_and_return
 
 
 def check_cuda_result(cuda, result_val):
@@ -88,22 +88,11 @@ def tokenize_paths(paths: str) -> Set[Path]:
     return {Path(ld_path) for ld_path in paths.split(":") if ld_path}
 
 
-def get_cuda_runtime_lib_path(
-    # TODO: replace this with logic for all paths in env vars
-    LD_LIBRARY_PATH: Union[str, None] = env.get("LD_LIBRARY_PATH")
-) -> Union[Path, None]:
-    """# TODO: add doc-string"""
-
-    if not LD_LIBRARY_PATH:
-        warn_of_missing_prerequisite(
-            "LD_LIBRARY_PATH is completely missing from environment!"
-        )
-        return None
-
-    ld_library_paths: Set[Path] = tokenize_paths(LD_LIBRARY_PATH)
+def resolve_env_variable(env_var):
+    paths: Set[Path] = tokenize_paths(env_var)
 
     non_existent_directories: Set[Path] = {
-        path for path in ld_library_paths if not path.exists()
+        path for path in paths if not path.exists()
     }
 
     if non_existent_directories:
@@ -114,7 +103,7 @@ def get_cuda_runtime_lib_path(
 
     cuda_runtime_libs: Set[Path] = {
         path / CUDA_RUNTIME_LIB
-        for path in ld_library_paths
+        for path in paths
         if (path / CUDA_RUNTIME_LIB).is_file()
     } - non_existent_directories
 
@@ -123,19 +112,35 @@ def get_cuda_runtime_lib_path(
             f"Found duplicate {CUDA_RUNTIME_LIB} files: {cuda_runtime_libs}.."
         )
         raise FileNotFoundError(err_msg)
+    elif len(cuda_runtime_libs) == 0: return None
+    else: return next(iter(cuda_runtime_libs)) # for now just return the first
+
+def get_cuda_runtime_lib_path() -> Union[Path, None]:
+    """# TODO: add doc-string"""
+
+    cuda_runtime_libs = []
+    if 'CONDA_PREFIX' in os.environ:
+        lib_conda_path = f'{os.environ["CONDA_PREFIX"]}/lib/'
+        print(lib_conda_path)
+        cuda_runtime_libs.append(resolve_env_variable(lib_conda_path))
+
+    if len(cuda_runtime_libs) == 1: return cuda_runtime_libs[0]
+
+    for var in os.environ:
+         cuda_runtime_libs.append(resolve_env_variable(var))
 
-    elif len(cuda_runtime_libs) < 1:
+    if len(cuda_runtime_libs) < 1:
         err_msg = (
             f"Did not find {CUDA_RUNTIME_LIB} files: {cuda_runtime_libs}.."
         )
         raise FileNotFoundError(err_msg)
 
-    single_cuda_runtime_lib_dir = next(iter(cuda_runtime_libs))
-    return single_cuda_runtime_lib_dir
+    return cuda_runtime_libs.pop()
 
 
 def evaluate_cuda_setup():
     cuda_path = get_cuda_runtime_lib_path()
+    print(f'CUDA SETUP: CUDA path found: {cuda_path}')
     cc = get_compute_capability()
     binary_name = "libbitsandbytes_cpu.so"
 
@@ -152,13 +157,10 @@ def evaluate_cuda_setup():
     # (2) Multiple CUDA versions installed
 
     cuda_home = str(Path(cuda_path).parent.parent)
-    ls_output, err = execute_and_return(f"{cuda_home}/bin/nvcc --version")
-    cuda_version = (
-        ls_output.split("\n")[3].split(",")[-1].strip().lower().replace("v", "")
-    )
-    major, minor, revision = cuda_version.split(".")
+    ls_output, err = execute_and_return(f"ls -l {cuda_path}")
+    major, minor, revision = ls_output.split(' ')[-1].replace('libcudart.so.', '').split('.')
     cuda_version_string = f"{major}{minor}"
 
-    binary_name = f'libbitsandbytes_cuda{cuda_version_string}_{("cublaslt" if has_cublaslt else "")}.so'
+    binary_name = f'libbitsandbytes_cuda{cuda_version_string}{("" if has_cublaslt else "_nocublaslt")}.so'
 
     return binary_name
-- 
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