The Travis CI build reports the following in the messages from
executing package/prepare_osx.sh:
sudo pip3 install --upgrade pip setuptools wheel
The directory '/Users/travis/Library/Caches/pip/http' or its \
parent directory is not owned by the current user and the cache \
has been disabled. Please check the permissions and owner of that \
directory. If executing pip with sudo, you may want sudo's -H \
flag.
The directory '/Users/travis/Library/Caches/pip' or its parent \
directory is not owned by the current user and caching wheels has \
been disabled. check the permissions and owner of that \
directory. If executing pip with sudo, you may want sudo's -H \
flag.
In an effort to address this issue, add "-H" flag to sudo.
The Travis CI builds have been failing with the following message:
The command "if [ "$TRAVIS_OS_NAME" = "osx" ]; then \
bash package/prepare_osx.sh; fi" \
failed and exited with 1 during .
This above line of code is from .travis.yml. Further examination of
the log from executing package/prepare_osx.sh shows the following
message:
<snip>
brew install python3 enchant
Error: python 2.7.12_1 is already installed
To upgrade to 3.6.5, run `brew upgrade python`
<snip>
Based on this message it appears that the method to install python3
has changed. Hence change command to upgrade python 2.x to 3.x.
