Generate release cycle chart and CSV

.github/workflows/release-cycle.yml

@@ -0,0 +1,35 @@
+name: Test release cycle
+
+on: [pull_request, push, workflow_dispatch]
+
+env:
+  FORCE_COLOR: 1
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-latest, ubuntu-latest]
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Silence Windows warnings
+        run: |
+          git config core.eol lf
+          git config core.autocrlf input
+
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3"
+
+      - name: Generate release cycle output
+        run: python -I -bb -X dev -X warn_default_encoding -W error _tools/generate_release_cycle.py
+
+      - name: Check for differences
+        run: |
+          git status
+          git diff
+          test $(git status --porcelain | wc -l) = 0

Makefile

@@ -38,6 +38,7 @@ help:
 	@echo "  linkcheck  to check all external links for integrity"
 	@echo "  doctest    to run all doctests embedded in the documentation (if enabled)"
 	@echo "  check      to run a check for frequent markup errors"
+	@echo "  versions   to update release cycle after changing release-cycle.json"
 
 .PHONY: clean
 clean: clean-venv
@@ -66,7 +67,7 @@ ensure-venv:
 	fi
 
 .PHONY: html
-html: ensure-venv
+html: ensure-venv versions
 	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
 	@echo
 	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
@@ -186,3 +187,16 @@ check: ensure-venv
 serve:
 	@echo "The 'serve' target was removed, use 'htmlview' instead" \
 	      "(see https://github.com/python/cpython/issues/80510)"
+
+include/branches.csv: include/release-cycle.json
+	$(PYTHON) _tools/generate_release_cycle.py
+
+include/end-of-life.csv: include/release-cycle.json
+	$(PYTHON) _tools/generate_release_cycle.py
+
+include/release-cycle.mmd: include/release-cycle.json
+	$(PYTHON) _tools/generate_release_cycle.py
+
+.PHONY: versions
+versions: include/branches.csv include/end-of-life.csv include/release-cycle.mmd
+	@echo Release cycle data generated.

_static/devguide_overrides.css

@@ -5,3 +5,68 @@
     width: 111px;
     height: 110px;
 }
+
+/* Release cycle chart */
+#python-release-cycle .mermaid .active0,
+#python-release-cycle .mermaid .active1,
+#python-release-cycle .mermaid .active2,
+#python-release-cycle .mermaid .active3 {
+    fill: #00dd00;
+    stroke: darkgreen;
+}
+
+#python-release-cycle .mermaid .done0,
+#python-release-cycle .mermaid .done1,
+#python-release-cycle .mermaid .done2,
+#python-release-cycle .mermaid .done3 {
+    fill: orange;
+    stroke: darkorange;
+}
+
+#python-release-cycle .mermaid .task0,
+#python-release-cycle .mermaid .task1,
+#python-release-cycle .mermaid .task2,
+#python-release-cycle .mermaid .task3 {
+    fill: #007acc;
+    stroke: #004455;
+}
+
+#python-release-cycle .mermaid .section0,
+#python-release-cycle .mermaid .section2 {
+    fill: darkgrey;
+}
+
+/* Set master colours */
+:root {
+    --mermaid-section1-3: white;
+    --mermaid-text-color: black;
+}
+
+@media (prefers-color-scheme: dark) {
+    body[data-theme=auto] {
+        --mermaid-section1-3: black;
+        --mermaid-text-color: #ffffffcc;
+    }
+}
+body[data-theme=dark] {
+    --mermaid-section1-3: black;
+    --mermaid-text-color: #ffffffcc;
+}
+
+#python-release-cycle .mermaid .section1,
+#python-release-cycle .mermaid .section3 {
+    fill: var(--mermaid-section1-3);
+}
+
+#python-release-cycle .mermaid .grid .tick text,
+#python-release-cycle .mermaid .sectionTitle0,
+#python-release-cycle .mermaid .sectionTitle1,
+#python-release-cycle .mermaid .sectionTitle2,
+#python-release-cycle .mermaid .sectionTitle3,
+#python-release-cycle .mermaid .taskTextOutside0,
+#python-release-cycle .mermaid .taskTextOutside1,
+#python-release-cycle .mermaid .taskTextOutside2,
+#python-release-cycle .mermaid .taskTextOutside3,
+#python-release-cycle .mermaid .titleText {
+    fill: var(--mermaid-text-color);
+}

_tools/generate_release_cycle.py

@@ -0,0 +1,108 @@
+"""Read in a JSON and generate two CSVs and a Mermaid file."""
+from __future__ import annotations
+
+import csv
+import datetime as dt
+import json
+
+MERMAID_HEADER = """
+gantt
+    dateFormat  YYYY-MM-DD
+    title       Python release cycle
+    axisFormat  %Y
+""".lstrip()
+
+MERMAID_SECTION = """
+    section Python {version}
+    {release_status}               :{mermaid_status}   python{version}, {first_release},{eol}
+"""  # noqa: E501
+
+MERMAID_STATUS_MAPPING = {
+    "feature": "",
+    "bugfix": "active,",
+    "security": "done,",
+    "end-of-life": "crit,",
+}
+
+
+def csv_date(date_str: str, now_str: str) -> str:
+    """Format a date for CSV."""
+    if date_str > now_str:
+        # Future, add italics
+        return f"*{date_str}*"
+    return date_str
+
+
+def mermaid_date(date_str: str) -> str:
+    """Format a date for Mermaid."""
+    if len(date_str) == len("yyyy-mm"):
+        # Mermaid needs a full yyyy-mm-dd, so let's approximate
+        date_str = f"{date_str}-01"
+    return date_str
+
+
+class Versions:
+    """For converting JSON to CSV and Mermaid."""
+
+    def __init__(self) -> None:
+        with open("include/release-cycle.json", encoding="UTF-8") as in_file:
+            self.versions = json.load(in_file)
+        self.sorted_versions = sorted(
+            self.versions.items(),
+            key=lambda k: [int(i) for i in k[0].split(".")],
+            reverse=True,
+        )
+
+    def write_csv(self) -> None:
+        """Output CSV files."""
+        now_str = str(dt.datetime.utcnow())
+
+        versions_by_category = {"branches": {}, "end-of-life": {}}
+        headers = None
+        for version, details in self.sorted_versions:
+            row = {
+                "Branch": details["branch"],
+                "Schedule": f":pep:`{details['pep']}`",
+                "Status": details["status"],
+                "First release": csv_date(details["first_release"], now_str),
+                "End of life": csv_date(details["end_of_life"], now_str),
+                "Release manager": details["release_manager"],
+            }
+            headers = row.keys()
+            cat = "end-of-life" if details["status"] == "end-of-life" else "branches"
+            versions_by_category[cat][version] = row
+
+        for cat, versions in versions_by_category.items():
+            with open(f"include/{cat}.csv", "w", encoding="UTF-8", newline="") as file:
+                csv_file = csv.DictWriter(file, fieldnames=headers, lineterminator="\n")
+                csv_file.writeheader()
+                csv_file.writerows(versions.values())
+
+    def write_mermaid(self) -> None:
+        """Output Mermaid file."""
+        out = [MERMAID_HEADER]
+
+        for version, details in reversed(self.versions.items()):
+            v = MERMAID_SECTION.format(
+                version=version,
+                first_release=details["first_release"],
+                eol=mermaid_date(details["end_of_life"]),
+                release_status=details["status"],
+                mermaid_status=MERMAID_STATUS_MAPPING[details["status"]],
+            )
+            out.append(v)
+
+        with open(
+            "include/release-cycle.mmd", "w", encoding="UTF-8", newline="\n"
+        ) as f:
+            f.writelines(out)
+
+
+def main() -> None:
+    versions = Versions()
+    versions.write_csv()
+    versions.write_mermaid()
+
+
+if __name__ == "__main__":
+    main()

conf.py

@@ -10,6 +10,7 @@
     'sphinx.ext.intersphinx',
     'sphinx.ext.todo',
     'sphinx_copybutton',
+    'sphinxcontrib.mermaid',
     'sphinxext.rediraffe',
 ]
 

include/branches.csv

@@ -1,5 +1,5 @@
-Branch,Schedule,Status,First release,End-of-life,Release manager
-main,:pep:`693`,features,*2023-10-02*,*2028-10*,Thomas Wouters
+Branch,Schedule,Status,First release,End of life,Release manager
+main,:pep:`693`,feature,*2023-10-02*,*2028-10*,Thomas Wouters
 3.11,:pep:`664`,bugfix,2022-10-24,*2027-10*,Pablo Galindo Salgado
 3.10,:pep:`619`,bugfix,2021-10-04,*2026-10*,Pablo Galindo Salgado
 3.9,:pep:`596`,security,2020-10-05,*2025-10*,Łukasz Langa

include/end-of-life.csv

@@ -1,4 +1,4 @@
-Branch,Schedule,Status,First release,End-of-life,Release manager
+Branch,Schedule,Status,First release,End of life,Release manager
 3.6,:pep:`494`,end-of-life,2016-12-23,2021-12-23,Ned Deily
 3.5,:pep:`478`,end-of-life,2015-09-13,2020-09-30,Larry Hastings
 3.4,:pep:`429`,end-of-life,2014-03-16,2019-03-18,Larry Hastings

include/release-cycle.json

@@ -0,0 +1,122 @@
+{
+  "3.12": {
+    "branch": "main",
+    "pep": 693,
+    "status": "feature",
+    "first_release": "2023-10-02",
+    "end_of_life": "2028-10",
+    "release_manager": "Thomas Wouters"
+  },
+  "3.11": {
+    "branch": "3.11",
+    "pep": 664,
+    "status": "bugfix",
+    "first_release": "2022-10-24",
+    "end_of_life": "2027-10",
+    "release_manager": "Pablo Galindo Salgado"
+  },
+  "3.10": {
+    "branch": "3.10",
+    "pep": 619,
+    "status": "bugfix",
+    "first_release": "2021-10-04",
+    "end_of_life": "2026-10",
+    "release_manager": "Pablo Galindo Salgado"
+  },
+  "3.9": {
+    "branch": "3.9",
+    "pep": 596,
+    "status": "security",
+    "first_release": "2020-10-05",
+    "end_of_life": "2025-10",
+    "release_manager": "Łukasz Langa"
+  },
+  "3.8": {
+    "branch": "3.8",
+    "pep": 569,
+    "status": "security",
+    "first_release": "2019-10-14",
+    "end_of_life": "2024-10",
+    "release_manager": "Łukasz Langa"
+  },
+  "3.7": {
+    "branch": "3.7",
+    "pep": 537,
+    "status": "security",
+    "first_release": "2018-06-27",
+    "end_of_life": "2023-06-27",
+    "release_manager": "Ned Deily"
+  },
+  "3.6": {
+    "branch": "3.6",
+    "pep": 494,
+    "status": "end-of-life",
+    "first_release": "2016-12-23",
+    "end_of_life": "2021-12-23",
+    "release_manager": "Ned Deily"
+  },
+  "3.5": {
+    "branch": "3.5",
+    "pep": 478,
+    "status": "end-of-life",
+    "first_release": "2015-09-13",
+    "end_of_life": "2020-09-30",
+    "release_manager": "Larry Hastings"
+  },
+  "3.4": {
+    "branch": "3.4",
+    "pep": 429,
+    "status": "end-of-life",
+    "first_release": "2014-03-16",
+    "end_of_life": "2019-03-18",
+    "release_manager": "Larry Hastings"
+  },
+  "3.3": {
+    "branch": "3.3",
+    "pep": 398,
+    "status": "end-of-life",
+    "first_release": "2012-09-29",
+    "end_of_life": "2017-09-29",
+    "release_manager": "Georg Brandl, Ned Deily (3.3.7+)"
+  },
+  "3.2": {
+    "branch": "3.2",
+    "pep": 392,
+    "status": "end-of-life",
+    "first_release": "2011-02-20",
+    "end_of_life": "2016-02-20",
+    "release_manager": "Georg Brandl"
+  },
+  "2.7": {
+    "branch": "2.7",
+    "pep": 373,
+    "status": "end-of-life",
+    "first_release": "2010-07-03",
+    "end_of_life": "2020-01-01",
+    "release_manager": "Benjamin Peterson"
+  },
+  "3.1": {
+    "branch": "3.1",
+    "pep": 375,
+    "status": "end-of-life",
+    "first_release": "2009-06-27",
+    "end_of_life": "2012-04-09",
+    "release_manager": "Benjamin Peterson"
+  },
+  "3.0": {
+    "branch": "3.0",
+    "pep": 361,
+    "status": "end-of-life",
+    "first_release": "2008-12-03",
+    "end_of_life": "2009-06-27",
+    "release_manager": "Barry Warsaw"
+  },
+  "2.6": {
+    "branch": "2.6",
+    "pep": 361,
+    "status": "end-of-life",
+    "first_release": "2008-10-01",
+    "end_of_life": "2013-10-29",
+    "release_manager": "Barry Warsaw"
+  }
+}