chore: Automate releases.

.github/release_notes.py

@@ -0,0 +1,90 @@
+# Copyright 2020 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import collections
+import subprocess
+import sys
+import typing
+
+
+class Changelog:
+    def __init__(self, git_log: str):
+        self._commits = {}
+        for commit in git_log.split('\n'):
+            # Spilt the type from the message.
+            type_ = 'other'
+            message = commit
+            if ':' in message:
+                type_, message = commit.split(':', 1)
+
+            # If the change is breaking, note it separately.
+            if type_.endswith('!'):
+                type_ = 'breaking'
+
+            # Add the commit to the appropriate bucket.
+            self._commits.setdefault(type_, [])
+            self._commits[type_].append(message.strip())
+
+    @property
+    def markdown(self):
+        """Return the changelog Markdown for the GitHub release."""
+        answer = ''
+        headers = collections.OrderedDict((
+            ('breaking', 'Breaking Changes'),
+            ('feat', 'Features'),
+            ('fix', 'Bugfixes'),
+            ('refactor', 'Refactors'),
+            ('docs', 'Documentation'),
+        ))
+        for key, header in headers.items():
+            if key in self._commits:
+                answer += f'## {header}\n\n'
+                for cmt in self._commits[key]:
+                    answer += f'- {cmt}\n'
+                answer += '\n'
+        return answer.strip()
+
+
+def exec(cmd: typing.List[str]) -> str:
+    """Execute the given command and return the output.
+
+    If the command returns a non-zero exit status, fail loudly and exit.
+    """
+    proc = subprocess.run(cmd, capture_output=True, text=True)
+    if proc.returncode != 0:
+        print(f'Error running {cmd[0]}: {proc.stderr}', file=sys.stderr)
+        sys.exit(proc.returncode)
+    return proc.stdout.strip()
+
+
+if __name__ == '__main__':
+    # Get the previous tag and the current tag.
+    revs = exec(['git', 'rev-list', '--simplify-by-decoration',
+                 '--tags', '--max-count=2']).split('\n')
+    new_tag, prev_tag = (exec(['git', 'describe', '--tags', r]) for r in revs)
+    commit_range = f'{prev_tag}..{new_tag}'
+    if len(sys.argv) > 1:
+        commit_range = sys.argv[1]
+
+    # Get the changelog between those two tags.
+    cl = Changelog(exec(['git', 'log', commit_range,
+                         '--oneline', '--pretty=format:%s']))
+
+    # Print the Markdown using GitHub's special syntax.
+    #
+    # Note: %0A must be used for newline.
+    # https://github.community/t/set-output-truncates-multiline-strings/16852
+    print('::set-output name=release_notes::{rel_notes}'.format(
+        rel_notes=cl.markdown.replace('\n', '%0A')
+    ))

.github/workflows/release.yaml

@@ -0,0 +1,60 @@
+---
+name: release
+on:
+  push:
+    tags: v[0-9]+.[0-9]+.[0-9]+
+jobs:
+  inspect:
+    runs-on: ubuntu-latest
+    container: python:3.8
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Get the version from the tag.
+        id: get_version
+        run: echo ::set-output name=version::${GITHUB_REF:11}
+        shell: bash
+      - name: Get the release notes from the previous release to this one.
+        id: release_tool
+        run: python ./.github/release_notes.py
+    outputs:
+      version: ${{ steps.get_version.outputs.version }}
+      release_notes: ${{ steps.release_tool.outputs.release_notes }}
+  github_release:
+    runs-on: ubuntu-latest
+    needs: inspect
+    steps:
+      - name: Create the GitHub release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+        with:
+          tag_name: v${{ needs.inspect.outputs.version }}
+          release_name: aip-site-generator ${{ needs.inspect.outputs.version }}
+          body: ${{ needs.inspect.outputs.release_notes }}
+          draft: false
+          prerelease: false
+  pypi_release:
+    runs-on: ubuntu-latest
+    container: python:3.8
+    needs:
+      - inspect
+      - github_release
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install twine.
+        run: pip install twine
+      - name: Set the version number.
+        run: |
+          cat > VERSION <<EOF
+          ${{ needs.inspect.outputs.version }}
+          EOF
+      - name: Create a source distribution.
+        run: python setup.py sdist
+      - name: Upload to PyPI.
+        run: twine upload dist/*
+        env:
+          TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
+          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+          TWINE_NON_INTERACTIVE: 1

MANIFEST.in

@@ -1,4 +1,4 @@
-include README.md CONTRIBUTING.md LICENSE
+include README.md CONTRIBUTING.md LICENSE VERSION
 recursive-include aip_site/support *
 global-exclude *.py[co]
 global-exclude __pycache__

README.md

@@ -1,10 +1,12 @@
 # aip.dev static site generator
 
-Welcome to our NIH static site generator.
+This is the site generator for [aip.dev](https://aip.dev) and its forks. It
+takes AIP files in a git repository and outputs a static website.
 
 ## Why?
 
 We are not fans of rolling our own tools when off-the-shelf alternatives exist.
+However, the AIP project has grown sufficiently mature to warrant it.
 
 GitHub Pages normally automatically builds documentation with [Jekyll][], but
 as the AIP system has grown, we are beginning to reach the limits of what
@@ -26,8 +28,10 @@ There are some additional advantages that we unlock with a custom generator:
   rather than modifying existing files.
 - We can provide useful abstractions for common deviations between companies
   (e.g. case systems) that minimize the need to fork AIPs.
+- We can customize the Markdown parsing where necessary (tabs, hotlinking,
+  etc.).
 
-## Grumble. Fine. How does it work?
+## How does it work?
 
 This is essentially split into three parts:
 

VERSION

@@ -0,0 +1 @@
+dev

setup.py

@@ -12,22 +12,31 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import io
 import os
 
 from setuptools import find_packages, setup  # type: ignore
 
 
 PACKAGE_ROOT = os.path.abspath(os.path.dirname(__file__))
 
+with io.open(os.path.join(PACKAGE_ROOT, 'VERSION'), 'r') as version_file:
+    VERSION = version_file.read().strip()
+
+with io.open(os.path.join(PACKAGE_ROOT, 'README.md'), 'r') as readme_file:
+    long_description = readme_file.read().strip()
+
 setup(
     name='aip-site-generator',
-    version='0.3.0',
+    version=VERSION,
     license='Apache 2.0',
     author='Luke Sneeringer',
     author_email='[email protected]',
     url='https://github.com/aip-dev/site-generator.git',
     packages=find_packages(exclude=['tests']),
     description='Static site generator for aip.dev and forks.',
+    long_description=long_description,
+    long_description_content_type='text/markdown',
     entry_points="""[console_scripts]
         aip-site-gen=aip_site.cli:publish
         aip-site-serve=aip_site.cli:serve