Fix: conan config install - overwrite read-only files / don't copy …

…file permissions (#7004)

* `conan config install` - overwrite read-only files

* `conan config install` - shouldn't copy file permission

* use `conans.util.files.remove()` to remove file

* use `conans.util.files` to make file read only

conans/client/conf/config_installer.py

@@ -1,6 +1,7 @@
 import json
 import os
 import shutil
+import stat
 from datetime import datetime
 from dateutil.tz import gettz
 
@@ -14,7 +15,7 @@
 from conans.client.tools import Git
 from conans.client.tools.files import unzip
 from conans.errors import ConanException
-from conans.util.files import mkdir, rmdir, walk, save, touch
+from conans.util.files import mkdir, rmdir, walk, save, touch, remove
 from conans.client.cache.cache import ClientCache
 
 
@@ -80,8 +81,8 @@ def _filecopy(src, filename, dst):
     src = os.path.join(src, filename)
     dst = os.path.join(dst, filename)
     if os.path.exists(dst):
-        os.remove(dst)
-    shutil.copy(src, dst)
+        remove(dst)
+    shutil.copyfile(src, dst)
 
 
 def _process_folder(config, folder, cache, output):

conans/test/functional/command/config_install_test.py

@@ -16,8 +16,7 @@
 from conans.errors import ConanException
 from conans.test.utils.test_files import temp_folder
 from conans.test.utils.tools import TestClient, StoppableThreadBottle
-from conans.util.files import load, mkdir, save, save_files
-
+from conans.util.files import load, mkdir, save, save_files, make_file_read_only
 
 win_profile = """[settings]
     os: Windows
@@ -528,6 +527,25 @@ def get_zip():
         self.assertIn("Unzipping", self.client.out)
         http_server.stop()
 
+    def test_overwrite_read_only_file(self):
+        source_folder = self._create_profile_folder()
+        self.client.run('config install "%s"' % source_folder)
+        # make existing settings.yml read-only
+        make_file_read_only(self.client.cache.settings_path)
+        self.assertFalse(os.access(self.client.cache.settings_path, os.W_OK))
+
+        # config install should overwrite the existing read-only file
+        self.client.run('config install "%s"' % source_folder)
+        self.assertTrue(os.access(self.client.cache.settings_path, os.W_OK))
+
+    def test_dont_copy_file_permissions(self):
+        source_folder = self._create_profile_folder()
+        # make source settings.yml read-only
+        make_file_read_only(os.path.join(source_folder, 'remotes.txt'))
+
+        self.client.run('config install "%s"' % source_folder)
+        self.assertTrue(os.access(self.client.cache.settings_path, os.W_OK))
+
 
 class ConfigInstallSchedTest(unittest.TestCase):
 

conans/util/files.py

@@ -31,12 +31,16 @@ def walk(top, **kwargs):
     return os.walk(top, **kwargs)
 
 
-def make_read_only(path):
-    for root, _, files in walk(path):
+def make_read_only(folder_path):
+    for root, _, files in walk(folder_path):
         for f in files:
             full_path = os.path.join(root, f)
-            mode = os.stat(full_path).st_mode
-            os.chmod(full_path, mode & ~ stat.S_IWRITE)
+            make_file_read_only(full_path)
+
+
+def make_file_read_only(file_path):
+    mode = os.stat(file_path).st_mode
+    os.chmod(file_path, mode & ~ stat.S_IWRITE)
 
 
 _DIRTY_FOLDER = ".dirty"