Blender LTS: Download + Release notes CMS scripts

This patch contains 2 scripts that will help with LTS releases

create_download_urls.py

    This python script is used to generate the download urls which we can
    copy-paste directly into the CMS of www.blender.org.

    Usage: create_download_urls.py --version 2.83.7

    Arguments:
      --version VERSION  Version string in the form of {major}.{minor}.{build}
                         (eg 2.83.7)

    The resulting html will be printed to the console.

create_release_notes.py
=======================

    This python script is used to generate the release notes which we can
    copy-paste directly into the CMS of www.blender.org and stores.

    Usage: ./create_release_notes.py --task=T77348 --version=2.83.7

    Arguments:
      --version VERSION  Version string in the form of {major}.{minor}.{build}
                         (e.g. 2.83.7)
      --task TASK        Phabricator ticket that is contains the release notes
                         information (e.g. T77348)
      --format FORMAT    Format the result in `text`, `steam`, `wiki` or `html`

Requirements
============

* Python 3.8 or later
* Python phabricator client version 0.7.0
  https://pypi.org/project/phabricator/

For convenience the python modules can be installed using pip.

    pip3 install -r ./requirements.txt

Differential Revision: https://developer.blender.org/D9055

4 files changed, 286 insertions, 0 deletions

diff --git a/release/lts/README.md b/release/lts/README.md
new file mode 100644
index 00000000000..8f7b6f0b87a
--- /dev/null
+++ b/release/lts/README.md
@@ -0,0 +1,41 @@
+This folder contains several scripts to smoothen the Blender LTS releases.
+
+create_download_urls.py
+=======================
+
+This python script is used to generate the download urls which we can
+copy-paste directly into the CMS of www.blender.org.
+
+Usage: create_download_urls.py --version 2.83.7
+
+Arguments:
+  --version VERSION  Version string in the form of {major}.{minor}.{build}
+                     (eg 2.83.7)
+
+The resulting html will be printed to the console.
+
+create_release_notes.py
+=======================
+
+This python script is used to generate the release notes which we can
+copy-paste directly into the CMS of www.blender.org and stores.
+
+Usage: ./create_release_notes.py --task=T77348 --version=2.83.7
+
+Arguments:
+  --version VERSION  Version string in the form of {major}.{minor}.{build}
+                     (e.g. 2.83.7)
+  --task TASK        Phabricator ticket that is contains the release notes
+                     information (e.g. T77348)
+  --format FORMAT    Format the result in `text`, `steam`, `wiki` or `html`
+
+Requirements
+============
+
+* Python 3.8 or later
+* Python phabricator client version 0.7.0
+  https://pypi.org/project/phabricator/
+
+For convenience the python modules can be installed using pip
+
+    pip3 install -r ./requirements.txt
\ No newline at end of file
diff --git a/release/lts/create_download_urls.py b/release/lts/create_download_urls.py
new file mode 100755
index 00000000000..0d0b2554d2a
--- /dev/null
+++ b/release/lts/create_download_urls.py
@@ -0,0 +1,78 @@
+#!/usr/bin/env python3
+
+import argparse
+import datetime
+
+
+DESCRIPTION = ("This python script is used to generate the download urls "
+               "which we can copy-paste directly into the CMS of "
+               "www.blender.org")
+USAGE = "create_download_urls --version=2.83.7"
+# Used date format: "September 30, 2020"
+DATE_FORMAT = "%B %d, %Y"
+
+
+class Version:
+    """
+    Version class that extracts the major, minor and build from
+    a version string
+    """
+    def __init__(self, version: str):
+        self.version = version
+        v = version.split(".")
+        self.major = v[0]
+        self.minor = v[1]
+        self.build = v[2]
+
+    def __str__(self) -> str:
+        return self.version
+
+
+def get_download_file_names(version: Version):
+    yield f"blender-{version}-linux64.tar.xz"
+    yield f"blender-{version}-macOS.dmg"
+    yield f"blender-{version}-windows64.msi"
+    yield f"blender-{version}-windows64.zip"
+
+
+def get_download_url(version: Version, file_name: str) -> str:
+    """
+    Get the download url for the given version and file_name
+    """
+    return (f"https://www.blender.org/download/Blender{version.major}"
+            f".{version.minor}/{file_name}")
+
+
+def generate_html(version: Version) -> str:
+    """
+    Generate download urls and format them into an HTML string
+    """
+    today = datetime.date.today()
+    lines = []
+    lines.append(f"Released on {today.strftime(DATE_FORMAT)}.")
+    lines.append("")
+    lines.append("<ul>")
+    for file_name in get_download_file_names(version):
+        download_url = get_download_url(version, file_name)
+        lines.append(f"  <li><a href=\"{download_url}\">{file_name}</a></li>")
+    lines.append("</ul>")
+
+    return "\n".join(lines)
+
+
+def print_download_urls(version: Version):
+    """
+    Generate the download urls and print them to the console.
+    """
+    print(generate_html(version))
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description=DESCRIPTION, usage=USAGE)
+    parser.add_argument("--version",
+                        required=True,
+                        help=("Version string in the form of {major}.{minor}."
+                              "{build} (eg 2.83.7)"))
+    args = parser.parse_args()
+
+    print_download_urls(version=Version(args.version))
diff --git a/release/lts/create_release_notes.py b/release/lts/create_release_notes.py
new file mode 100755
index 00000000000..2a396dca6b0
--- /dev/null
+++ b/release/lts/create_release_notes.py
@@ -0,0 +1,166 @@
+#!/usr/bin/env python3
+
+import argparse
+import phabricator
+
+
+DESCRIPTION = ("This python script is used to generate the release notes "
+               "which we can copy-paste directly into the CMS of "
+               "www.blender.org and stores.")
+USAGE = "./create_release_notes.py --task=T77348 --version=2.83.7"
+
+
+class ReleaseLogLine:
+    """
+    Class containing the information of a single line of the release log
+
+    Instance attributes:
+
+    * line: (str) the original line used to create this log line
+    * task_id: (int or None) the extracted task id associated with this log
+               line. Can be None if the log line isn't associated with a task.
+    * commit_id: (str or None) the extracted commit id associated with this log
+               line. Only filled when no `task_id` could be found.
+    * ref: (str) `task_id` or `commit_id` of this line, including `T` for tasks
+            or `D` for diffs.
+    * title: (str) title of this log line. When constructed this attribute is
+            an empty string. The called needs to retrieve the title from the
+            backend.
+    * url: (str) url of the ticket task or commit.
+    """
+    def __init__(self, line: str):
+        self.line=line
+        items = line.split("|")
+        self.task_id = None
+        self.commit_id = None
+        try:
+            task_id = int(items[1].strip()[1:])
+            self.task_id = task_id
+            self.ref = f"T{self.task_id}"
+        except ValueError:
+            # no task
+            commit_string = items[3].strip()
+            commits = commit_string.split(",")
+            commit_id = commits[0]
+            commit_id = commit_id.replace("{", "").replace("}", "")
+            if not commit_id.startswith("rB"):
+                commit_id = f"rB{commit_id}"
+            self.commit_id = commit_id
+
+            self.ref = f"{self.commit_id}"
+
+        self.title = ""
+        self.url = f"https://developer.blender.org/{self.ref}"
+    
+    def __format_as_html(self)-> str:
+        return f"  <li>{self.title} [<a href=\"{self.url}\">{self.ref}</a>]</li>"
+
+    def __format_as_text(self) ->str:
+        return f"* {self.title} [{self.ref}]"
+
+    def __format_as_steam(self) -> str:
+        return f"* {self.title} ([url={self.url}]{self.ref}[/url])"
+
+    def __format_as_wiki(self) -> str:
+        if self.task_id:
+            return f"* {self.title} [{{{{BugReport|{self.task_id}}}}}]"
+        else:
+            return f"* {self.title} [{{{{GitCommit|{self.commit_id[2:]}}}}}]"
+
+    def format(self, format: str) -> str:
+        """
+        Format this line
+
+        :attr format: the desired format. Possible values are 'text', 'steam' or 'html'
+        :type string:
+        """
+        if format == 'html':
+            return self.__format_as_html()
+        elif format == 'steam':
+            return self.__format_as_steam()
+        elif format == 'wiki':
+            return self.__format_as_wiki()
+        else:
+            return self.__format_as_text()
+
+
+def format_title(title: str) -> str:
+    title = title.strip()
+    if not title.endswith("."):
+        title = title + "."
+    return title
+
+
+def extract_release_notes(version: str, task_id: int):
+    """
+    Extract all release notes logs
+
+    # Process
+
+    1. Retrieval of description of the gived `task_id`.
+    2. Find rows for the given `version` and convert to `ReleaseLogLine`.
+    3. based on the associated task or commit retrieves the title of the log
+       line.
+    """
+    phab = phabricator.Phabricator()
+    phab.update_interfaces()
+    task = phab.maniphest.info(task_id=task_id)
+    description = task["description"]
+    lines = description.split("\n")
+    start_index = lines.index(f"## Blender {version} ##")
+    lines = lines[start_index+1:]
+    for line in lines:
+        if not line.strip():
+            continue
+        if line.startswith("| **Report**"):
+            continue
+        if line.startswith("## Blender"):
+            break
+
+        log_line = ReleaseLogLine(line)
+        if log_line.task_id:
+            issue_task = phab.maniphest.info(task_id=log_line.task_id)
+            log_line.title = format_title(issue_task.title)
+            yield log_line
+        elif log_line.commit_id:
+            commits = phab.diffusion.commit.search(constraints={"identifiers":[log_line.commit_id]})
+            commit = commits.data[0]
+            commit_message = commit['fields']['message']
+            commit_title = commit_message.split("\n")[0]
+            log_line.title = format_title(commit_title)
+            yield log_line
+
+
+def print_release_notes(version: str, format: str, task_id: int):
+    """
+        Generate and print the release notes to the console.
+    """
+    if format == 'html':
+        print("<ul>")
+    if format == 'steam':
+        print("[ul]")
+    for log_item in extract_release_notes(version=version, task_id=task_id):
+        print(log_item.format(format=format))
+    if format == 'html':
+        print("</ul>")
+    if format == 'steam':
+        print("[/ul]")
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description=DESCRIPTION, usage=USAGE)
+    parser.add_argument(
+        "--version",
+        required=True,
+        help="Version string in the form of {major}.{minor}.{build} (e.g. 2.83.7)")
+    parser.add_argument(
+        "--task",
+        required=True,
+        help="Phabricator ticket that is contains the release notes information (e.g. T77348)")
+    parser.add_argument(
+        "--format",
+        help="Format the result in `text`, `steam`, `wiki` or `html`",
+        default="text")
+    args = parser.parse_args()
+
+    print_release_notes(version=args.version, format=args.format, task_id=int(args.task[1:]))
diff --git a/release/lts/requirements.txt b/release/lts/requirements.txt
new file mode 100644
index 00000000000..dc91ba85b01
--- /dev/null
+++ b/release/lts/requirements.txt
@@ -0,0 +1 @@
+phabricator==0.7.0
\ No newline at end of file