Adopt bump2version for automating version bumps

.bumpversion.cfg

@@ -0,0 +1,19 @@
+[bumpversion]
+current_version = 0.4.4.dev
+parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\.(?P<release>[a-z0-9]+))?
+tag_name = {new_version}
+allow_dirty = True
+commit = True
+tag = False
+serialize =
+	{major}.{minor}.{patch}.{release}
+	{major}.{minor}.{patch}
+
+[bumpversion:file:chartpress.py]
+
+[bumpversion:part:release]
+optional_value = stable
+values =
+	dev
+	stable
+

.travis.yml

@@ -5,8 +5,9 @@ cache: pip
 install:
   - set -e
   - pip install --upgrade pip
-  - pip install .
   - pip install -r dev-requirements.txt
+  - pip install .
+  - pip freeze
   - curl -L https://git.io/get_helm.sh | bash
   - helm init --client-only
 

RELEASE.md

@@ -9,45 +9,51 @@ For you to follow along according to these instructions, you need:
   project](https://pypi.org/project/chartpress/).
 - To have push rights to the [chartpress GitHub repository](https://github.com/jupyterhub/chartpress).
 
-## Technical steps to make a release
+## Steps to make a release
 
-1. Checkout master and make sure it is up to date.
+1. Update [CHANGELOG.md](CHANGELOG.md) if it is not up to date,
+   and verify [README.md](README.md) has an updated output of running `--help`.
+   Make a PR to review the CHANGELOG notes.
 
-   ```
+1. Once the changelog is up to date, checkout master and make sure it is up to date and clean.
+
+   ```bash
+   ORIGIN=${ORIGIN:-origin} # set to the canonical remote, e.g. 'upstream' if 'origin' is not the official repo
    git checkout master
-   git fetch <upstream> master
-   git reset --hard <upstream>/master
+   git fetch $ORIGIN master
+   git reset --hard $ORIGIN/master
+   # WARNING! This next command deletes any untracked files in the repo
+   git clean -xfd
    ```
 
-1. Update [CHANGELOG.md](CHANGELOG.md) and verify [README.md](README.md) has an
-   updated output of running `--help`.
-
-1. Set the `__version__` variable in [chartpress.py](chartpress.py)
-   appropriately and make a commit with message `release <tag>`.
+1. Update the version with `bump2version` (can be installed with `pip install -r dev-requirements.txt`)
 
-1. Create a git tag for the commit.
-
-   ```
-   git tag -a <tag> -m <tag> HEAD
+   ```bash
+   VERSION=...  # e.g. 1.2.3
+   bump2version --tag --new-version $VERSION -
    ```
 
 1. Package the release
-   ```
-   python3 setup.py bdist_wheel
+
+   ```bash
+   python3 setup.py sdist bdist_wheel
    ```
 
 1. Upload it to PyPI
-   ```
-   twine upload dist/chartpress-<tag>-py3-none-any.whl
+
+   ```bash
+   twine upload dist/*
    ```
 
-1. Reset the `__version__` variable in [chartpress.py](chartpress.py)
-   appropriately with a `.dev` appendix and make a commit with the message `back
-   to dev`.
+1. Reset the version to the next development version with `bump2version`
+
+   ```bash
+   bump2version --no-tag patch
+   ```
 
 1. Push your two commits to master along with the annotated tags referencing
    commits on master.
 
    ```
-   git push --follow-tags <upstream> master
+   git push --follow-tags $ORIGIN master
    ```

dev-requirements.txt

@@ -1,3 +1,6 @@
+bump2version
 gitpython
 pytest
 pytest-flakes
+twine
+wheel