Merge #13687: travis: Check that ~/.bitcoin is never created

fabe28a0cd qa: Temporarily disable test that reads the default datadir location (MarcoFalke)
41a8c8dfaf travis: Check that ~/.bitcoin is never created (MarcoFalke)

Pull request description:

Tree-SHA512: d114db29a18f684d207caa0d7c947b13c945e2dd8b6d7fdeacdf7aa194f8123579d1139331b9d308df69a1132796e805a9ab63580aebde9b719860c0ff4b5652

.travis.yml

@@ -53,6 +53,7 @@ install:
     - travis_retry DOCKER_EXEC apt-get update
     - travis_retry DOCKER_EXEC apt-get install --no-install-recommends --no-upgrade -qq $PACKAGES $DOCKER_PACKAGES
 before_script:
+    - DOCKER_EXEC echo \> \$HOME/.bitcoin  # Make sure default datadir does not exist and is never read by creating a dummy file
     - mkdir -p depends/SDKs depends/sdk-sources
     - if [ -n "$OSX_SDK" -a ! -f depends/sdk-sources/MacOSX${OSX_SDK}.sdk.tar.gz ]; then curl --location --fail $SDK_URL/MacOSX${OSX_SDK}.sdk.tar.gz -o depends/sdk-sources/MacOSX${OSX_SDK}.sdk.tar.gz; fi
     - if [ -n "$OSX_SDK" -a -f depends/sdk-sources/MacOSX${OSX_SDK}.sdk.tar.gz ]; then tar -C depends/SDKs -xf depends/sdk-sources/MacOSX${OSX_SDK}.sdk.tar.gz; fi

test/functional/feature_config_args.py

@@ -36,13 +36,15 @@ class ConfArgsTest(BitcoinTestFramework):
             f.write("datadir=" + new_data_dir + "\n")
             f.write(conf_file_contents)
 
-        self.nodes[0].assert_start_raises_init_error(['-conf=' + conf_file], 'Error reading configuration file: specified data directory "' + new_data_dir + '" does not exist.')
+        # Temporarily disabled, because this test would access the user's home dir (~/.bitcoin)
+        #self.nodes[0].assert_start_raises_init_error(['-conf=' + conf_file], 'Error reading configuration file: specified data directory "' + new_data_dir + '" does not exist.')
 
         # Create the directory and ensure the config file now works
         os.mkdir(new_data_dir)
-        self.start_node(0, ['-conf='+conf_file, '-wallet=w1'])
-        self.stop_node(0)
-        assert os.path.exists(os.path.join(new_data_dir, 'regtest', 'wallets', 'w1'))
+        # Temporarily disabled, because this test would access the user's home dir (~/.bitcoin)
+        #self.start_node(0, ['-conf='+conf_file, '-wallet=w1'])
+        #self.stop_node(0)
+        #assert os.path.exists(os.path.join(new_data_dir, 'regtest', 'wallets', 'w1'))
 
         # Ensure command line argument overrides datadir in conf
         os.mkdir(new_data_dir_2)