Allow choosing just the type of release in CD workflow

Makes it more convenient and avoids typos in the inputted version
number.

Author: ruohola

.github/workflows/cd.yml

@@ -3,9 +3,14 @@ name: "CD"
 on:
   workflow_dispatch:
     inputs:
-      version:
-        description: "Version of the release, e.g. 1.0.0"
+      release-type:
+        description: "Type of release?"
         required: true
+        type: choice
+        options:
+          - patch
+          - minor
+          - major
 
 jobs:
   release:
@@ -17,20 +22,6 @@ jobs:
         with:
           token: ${{ secrets.GH_PAT }}
 
-      - name: "Update the changelog"
-        # Find the first line that starts with `###` or `## [<number>` from the CHANGELOG and insert the new version header before it.
-        run: >
-          current_date="$(date '+%Y-%m-%d')"
-          && sed -i "0,/^\(###\|## *\[[0-9]\).*/{s//## [${{ github.event.inputs.version }}] - ${current_date}\n\n&/}" CHANGELOG.md
-
-      - name: "Bump pyproject.toml to new version"
-        run: sed -i 's/^version *=.*/version = "${{ github.event.inputs.version }}"/' pyproject.toml
-
-      - name: "Extract version's changelog for release notes and tag message"
-        # 1. Find the lines between the first `## [<number>` and the second `## [<number>`.
-        # 2. Remove all leading and trailing newlines from the output.
-        run: sed '1,/^## *\[[0-9]/d;/^## *\[[0-9]/Q' CHANGELOG.md | sed -e :a -e '/./,$!d;/^\n*$/{$d;N;};/\n$/ba' > release_notes.txt
-
       - name: "Set up Python"
         id: setup-python
         uses: actions/setup-python@v2
@@ -43,6 +34,12 @@ jobs:
           virtualenvs-create: true
           virtualenvs-in-project: true
 
+      - name: "Bump pyproject.toml to new version"
+        id: bump
+        run: |
+          poetry version ${{ github.event.inputs.release-type }}
+          echo "::set-output name=version::$(poetry version --short)"
+
       - name: "Build the wheel"
         run: poetry build
 
@@ -51,17 +48,28 @@ jobs:
         env:
           POETRY_PYPI_TOKEN_PYPI: ${{ secrets.PYPI_TOKEN }}
 
+      - name: "Update the changelog"
+        # Find the first line that starts with `###` or `## [<number>` from the CHANGELOG and insert the new version header before it.
+        run: |
+          current_date="$(date '+%Y-%m-%d')"
+          sed -i "0,/^\(###\|## *\[[0-9]\).*/{s//## [${{ steps.bump.outputs.version }}] - ${current_date}\n\n&/}" CHANGELOG.md
+
+      - name: "Extract version's changelog for release notes and tag message"
+        # 1. Find the lines between the first `## [<number>` and the second `## [<number>`.
+        # 2. Remove all leading and trailing newlines from the output.
+        run: sed '1,/^## *\[[0-9]/d;/^## *\[[0-9]/Q' CHANGELOG.md | sed -e :a -e '/./,$!d;/^\n*$/{$d;N;};/\n$/ba' > release_notes.txt
+
       - name: "Commit and tag the changes"
         uses: EndBug/add-and-commit@8c12ff729a98cfbcd3fe38b49f55eceb98a5ec02  # v7.5.0
         with:
           add: '["pyproject.toml", "CHANGELOG.md"]'
-          message: 'Release ${{ github.event.inputs.version }}'
-          tag: 'v${{ github.event.inputs.version }} --annotate --file /dev/null'
+          message: 'Release ${{ steps.bump.outputs.version }}'
+          tag: 'v${{ steps.bump.outputs.version }} --annotate --file /dev/null'
           default_author: github_actions
 
       - name: "Create a GitHub release"
         uses: softprops/action-gh-release@1e07f4398721186383de40550babbdf2b84acfc5  # v1
         with:
-          tag_name: v${{ github.event.inputs.version }}
-          name: v${{ github.event.inputs.version }}
+          tag_name: v${{ steps.bump.outputs.version }}
+          name: v${{ steps.bump.outputs.version }}
           body_path: release_notes.txt