Cleanup + initialize micromamba by sourcing bashrc

.travis.yml

@@ -6,13 +6,16 @@
 # Avoiding duplicate branch-pr triggers:
 # https://github.com/travis-ci/travis-ci/issues/1147#issuecomment-160820262
 dist: xenial
-branches:
-  only:
-    - master
+sudo: false  # use container based build
 language: python
+
 notifications:
   email: false
 
+branches:
+  only:
+    - master
+
 python:
   - "3.7"
 
@@ -26,20 +29,20 @@ before_install:
         fi
   - curl micro.mamba.pm/install.sh | bash
   - export PATH="$HOME/micromamba/bin:$PATH"
-  - hash -r
-  - micromamba shell init -s bash -p ~/micromamba
   - micromamba config set always_yes true
   - micromamba config set changeps1 false
   - micromamba config set show_channel_urls true
+  - micromamba shell init --shell=bash --prefix=~/micromamba
 
 install:
+  - . ~/.bashrc
+  - which python
+  - which micromamba
   - micromamba env create --file ci/environment.yml
   - micromamba activate proplot-dev
-  - micromamba list
-  - which micromamba
-  - which python
   - python setup.py sdist bdist_wheel
   - pip install --user ./dist/*.whl
+  - micromamba list
 
 script:
   - ci/run-linter.sh