Reformat cuquantum_configure.bzl using Buildifier (#949)

I missed this file in PR #948

Author: mhucka

third_party/cuquantum/cuquantum_configure.bzl

@@ -15,7 +15,6 @@
 """Setup cuQuantum as external dependency"""
 _CUQUANTUM_ROOT = "CUQUANTUM_ROOT"
 
-
 def _tpl(repository_ctx, tpl, substitutions = {}, out = None):
     if not out:
         out = tpl
@@ -25,14 +24,12 @@ def _tpl(repository_ctx, tpl, substitutions = {}, out = None):
         substitutions,
     )
 
-
 def _fail(msg):
     """Output failure message when auto configuration fails."""
     red = "\033[0;31m"
     no_color = "\033[0m"
     fail("%sPython Configuration Error:%s %s\n" % (red, no_color, msg))
 
-
 def _execute(
         repository_ctx,
         cmdline,
@@ -60,7 +57,6 @@ def _execute(
         ]))
     return result
 
-
 def _read_dir(repository_ctx, src_dir):
     """Returns a string with all files in a directory.
 
@@ -76,18 +72,17 @@ def _read_dir(repository_ctx, src_dir):
     result = find_result.stdout
     return result
 
-
 def _find_file(repository_ctx, filename):
     """Returns a string with a directory path including the filename.
 
     The returned string contains the parent path of the filename.
     """
     result = repository_ctx.execute(
-        ["timeout", "5", "find", "/", "-name", filename, "-print", "-quit", "-not", "-path", "'*/.*'", "-quit"]).stdout
-    result = result[:result.find(filename)+len(filename)]
+        ["timeout", "5", "find", "/", "-path", "*/.*", "-prune", "-o", "-name", filename, "-print", "-quit"],
+    ).stdout
+    result = result[:result.find(filename) + len(filename)]
     return result
 
-
 def _genrule(genrule_name, command, outs):
     """Returns a string with a genrule.
 
@@ -121,7 +116,6 @@ def _norm_path(path):
         path = path[:-1]
     return path
 
-
 def _symlink_genrule_for_dir(
         repository_ctx,
         src_dir,
@@ -170,9 +164,9 @@ def _symlink_genrule_for_dir(
     """
     if is_empty_genrule:
         if dest_dir != "":
-          target_path = "%s/%s.h" % (dest_dir, genrule_name)
+            target_path = "%s/%s.h" % (dest_dir, genrule_name)
         else:
-          target_path = genrule_name
+            target_path = genrule_name
         genrule = _genrule(
             genrule_name,
             "touch $(OUTS)",
@@ -208,21 +202,20 @@ def _symlink_genrule_for_dir(
     )
     return genrule
 
-
 def _cuquantum_pip_impl(repository_ctx):
     if _CUQUANTUM_ROOT in repository_ctx.os.environ:
-      cuquantum_root = repository_ctx.os.environ[_CUQUANTUM_ROOT]
+        cuquantum_root = repository_ctx.os.environ[_CUQUANTUM_ROOT]
     else:
-      repository_ctx.os.environ[_CUQUANTUM_ROOT] = ""
-      cuquantum_root = ""
+        repository_ctx.os.environ[_CUQUANTUM_ROOT] = ""
+        cuquantum_root = ""
 
     if cuquantum_root == "":
-      cuquantum_header_path = _find_file(repository_ctx, "custatevec.h")
-      cuquantum_header_path = cuquantum_header_path[:cuquantum_header_path.find("/custatevec.h")]
-      custatevec_shared_library_path = _find_file(repository_ctx, "libcustatevec.so")
+        cuquantum_header_path = _find_file(repository_ctx, "custatevec.h")
+        cuquantum_header_path = cuquantum_header_path[:cuquantum_header_path.find("/custatevec.h")]
+        custatevec_shared_library_path = _find_file(repository_ctx, "libcustatevec.so")
     else:
-      cuquantum_header_path = "%s/include" % cuquantum_root
-      custatevec_shared_library_path = "%s/lib/libcustatevec.so" % (cuquantum_root)
+        cuquantum_header_path = "%s/include" % cuquantum_root
+        custatevec_shared_library_path = "%s/lib/libcustatevec.so" % (cuquantum_root)
 
     is_empty_genrule = cuquantum_header_path == "" or custatevec_shared_library_path == ""
 
@@ -231,7 +224,7 @@ def _cuquantum_pip_impl(repository_ctx):
         cuquantum_header_path,
         "include",
         "cuquantum_header_include",
-        is_empty_genrule=is_empty_genrule,
+        is_empty_genrule = is_empty_genrule,
     )
 
     custatevec_shared_library_rule = _symlink_genrule_for_dir(
@@ -241,15 +234,14 @@ def _cuquantum_pip_impl(repository_ctx):
         "libcustatevec.so",
         [custatevec_shared_library_path],
         ["libcustatevec.so"],
-        is_empty_genrule=is_empty_genrule,
+        is_empty_genrule = is_empty_genrule,
     )
 
     _tpl(repository_ctx, "BUILD", {
         "%{CUQUANTUM_HEADER_GENRULE}": cuquantum_header_rule,
         "%{CUSTATEVEC_SHARED_LIBRARY_GENRULE}": custatevec_shared_library_rule,
     })
 
-
 cuquantum_configure = repository_rule(
     implementation = _cuquantum_pip_impl,
     environ = [