Fix CI. Format run_conan.py with Black

run_conan.py

@@ -7,63 +7,82 @@
 import subprocess as sp
 import shutil
 import os
+import sys
 
 
 def find_conan():
     conan = shutil.which("conan")
     if conan is None:
-        raise RuntimeError("Unable to find conan in your PATH.\n"
-                           "Please install conan: https://conan.io/downloads")
+        raise RuntimeError(
+            "Unable to find conan in your PATH.\n"
+            "Please install conan: https://conan.io/downloads"
+        )
 
     return conan
 
 
-def run_conan_profile_detect(conan):
+def run_conan_profile_detect(conan, env):
+    sp.run([conan, "profile", "detect"], stdout=sp.DEVNULL, env=env)
 
-    sp.run([conan, "profile", "detect"], stderr=sp.DEVNULL, stdout=sp.DEVNULL)
 
-
-def run_conan_install(conan):
-    sp.check_call([conan, "install", os.path.join("..", "conanfile.txt"), "--settings=build_type=Release",
-                  "--settings=compiler.cppstd=17", "--output-folder=conan-staging",
-                   "--build=missing", "--update"], stdout=sp.DEVNULL)
+def run_conan_install(conan, env):
+    sp.check_call(
+        [
+            conan,
+            "install",
+            os.path.join("..", "conanfile.txt"),
+            "--settings=build_type=Release",
+            "--settings=compiler.cppstd=17",
+            "--output-folder=conan-staging",
+            "--build=missing",
+            "--update",
+        ],
+        stdout=sp.DEVNULL,
+        env=env,
+    )
 
 
 def main():
     conan = find_conan()
     pwd = os.getcwd()
 
+    env = os.environ.copy()
+
     conandeps_mk = os.path.join(pwd, "conan-staging", "conandeps.mk")
 
     if os.path.exists(conandeps_mk):
         print(conandeps_mk)
         return
 
-    conan_home = os.getenv("CONAN_HOME")
+    conan_home = env.get("CONAN_HOME")
     if conan_home is not None:
         os.makedirs(conan_home, exist_ok=True)
 
-        cc = os.getenv("CC")
+        cc = env.get("CC")
 
         new_cc = os.path.join(conan_home, "gcc")
         try:
             os.symlink(cc, new_cc)
         except FileExistsError:
             pass
-        os.environ["CC"] = new_cc
+        env["CC"] = new_cc
 
-        cxx = os.getenv("CXX")
+        cxx = env.get("CXX")
         if cxx is not None:
             new_cxx = os.path.join(conan_home, "g++")
 
             try:
                 os.symlink(cxx, new_cxx)
             except FileExistsError:
                 pass
-            os.environ["CXX"] = new_cxx
+            env["CXX"] = new_cxx
+
+    print("CONAN_HOME=" + env.get("CONAN_HOME", ""), file=sys.stderr)
+    print("CC=" + env.get("CC", ""), file=sys.stderr)
+    print("CXX=" + env.get("CXX", ""), file=sys.stderr)
 
-    run_conan_profile_detect(conan)
-    run_conan_install(conan)
+    run_conan_profile_detect(conan, env)
+    run_conan_install(conan, env)
     print(conandeps_mk)