util: explicit isdir arg from set_log_perms

target already exists, we should just inspect target and find if it is a
directory or not.

subiquity/server/controllers/shutdown.py

@@ -113,7 +113,7 @@ async def copy_logs_to_target(self, context):
                 ["cp", "-aT", "/var/log/installer", target_logs]
             )
             # Close the permissions from group writes on the target.
-            set_log_perms(target_logs, isdir=True, group_write=False)
+            set_log_perms(target_logs, group_write=False)
 
         journal_txt = os.path.join(target_logs, "installer-journal.txt")
         try:

subiquitycore/file_util.py

@@ -29,9 +29,7 @@
 log = logging.getLogger("subiquitycore.file_util")
 
 
-def set_log_perms(
-    target, *, isdir=True, group_write=False, mode=None, group=_DEF_GROUP
-):
+def set_log_perms(target, *, group_write=False, mode=None, group=_DEF_GROUP):
     if os.getuid() != 0:
         log.warning(
             "set_log_perms: running as non-root - not adjusting"
@@ -41,7 +39,7 @@ def set_log_perms(
         return
     if mode is None:
         mode = _DEF_PERMS_FILE
-        if isdir:
+        if os.path.isdir(target):
             mode |= 0o110
         if group_write:
             mode |= 0o020

subiquitycore/log.py

@@ -23,7 +23,7 @@ def setup_logger(dir, base="subiquity"):
     os.makedirs(dir, exist_ok=True)
     # Create the log directory in such a way that users in the group may
     # write to this directory in the installation environment.
-    set_log_perms(dir, isdir=True, group_write=True)
+    set_log_perms(dir, group_write=True)
 
     logger = logging.getLogger("")
     logger.setLevel(logging.DEBUG)
@@ -34,7 +34,7 @@ def setup_logger(dir, base="subiquity"):
         nopid_file = os.path.join(dir, "{}-{}.log".format(base, level))
         logfile = "{}.{}".format(nopid_file, os.getpid())
         handler = logging.FileHandler(logfile)
-        set_log_perms(logfile, isdir=False, group_write=False)
+        set_log_perms(logfile, group_write=False)
         # os.symlink cannot replace an existing file or symlink so create
         # it and then rename it over.
         tmplink = logfile + ".link"