[cli] Export list of `develop` PRs to be merged into `master` (#13944)

* Add developer-only command for exporting the list of PRs associated with a merge to `develop`.

* qmk pytest

* Imports.

* Remove dependencies from requirements file, manually handle.

* Reduce complexity, qmk generate-api taking too long so relying on CI

2 files changed, 120 insertions, 0 deletions

diff --git a/lib/python/qmk/cli/__init__.py b/lib/python/qmk/cli/__init__.py
index edf351d62..c51eece95 100644
--- a/lib/python/qmk/cli/__init__.py
+++ b/lib/python/qmk/cli/__init__.py
@@ -47,6 +47,7 @@ subcommands = [
     'qmk.cli.generate.api',
     'qmk.cli.generate.compilation_database',
     'qmk.cli.generate.config_h',
+    'qmk.cli.generate.develop_pr_list',
     'qmk.cli.generate.dfu_header',
     'qmk.cli.generate.docs',
     'qmk.cli.generate.info_json',
diff --git a/lib/python/qmk/cli/generate/develop_pr_list.py b/lib/python/qmk/cli/generate/develop_pr_list.py
new file mode 100755
index 000000000..de4eaa7d8
--- /dev/null
+++ b/lib/python/qmk/cli/generate/develop_pr_list.py
@@ -0,0 +1,119 @@
+"""Export the initial list of PRs associated with a `develop` merge to `master`.
+"""
+import os
+import re
+from pathlib import Path
+from subprocess import DEVNULL
+
+from milc import cli
+
+cache_timeout = 7 * 86400
+fix_expr = re.compile(r'fix', flags=re.IGNORECASE)
+clean1_expr = re.compile(r'\[(develop|keyboard|keymap|core|cli|bug|docs|feature)\]', flags=re.IGNORECASE)
+clean2_expr = re.compile(r'^(develop|keyboard|keymap|core|cli|bug|docs|feature):', flags=re.IGNORECASE)
+
+
+def _get_pr_info(cache, gh, pr_num):
+    pull = cache.get(f'pull:{pr_num}')
+    if pull is None:
+        print(f'Retrieving info for PR #{pr_num}')
+        pull = gh.pulls.get(owner='qmk', repo='qmk_firmware', pull_number=pr_num)
+        cache.set(f'pull:{pr_num}', pull, cache_timeout)
+    return pull
+
+
+def _try_open_cache(cli):
+    # These dependencies are manually handled because people complain. Fun.
+    try:
+        from sqlite_cache.sqlite_cache import SqliteCache
+    except ImportError:
+        return None
+
+    cache_loc = Path(cli.config_file).parent
+    return SqliteCache(cache_loc)
+
+
+def _get_github():
+    try:
+        from ghapi.all import GhApi
+    except ImportError:
+        return None
+
+    return GhApi()
+
+
+@cli.argument('-f', '--from-ref', default='0.11.0', help='Git revision/tag/reference/branch to begin search')
+@cli.argument('-b', '--branch', default='upstream/develop', help='Git branch to iterate (default: "upstream/develop")')
+@cli.subcommand('Creates the develop PR list.', hidden=False if cli.config.user.developer else True)
+def generate_develop_pr_list(cli):
+    """Retrieves information from GitHub regarding the list of PRs associated
+    with a merge of `develop` branch into `master`.
+
+    Requires environment variable GITHUB_TOKEN to be set.
+    """
+
+    if 'GITHUB_TOKEN' not in os.environ or os.environ['GITHUB_TOKEN'] == '':
+        cli.log.error('Environment variable "GITHUB_TOKEN" is not set.')
+        return 1
+
+    cache = _try_open_cache(cli)
+    gh = _get_github()
+
+    git_args = ['git', 'rev-list', '--oneline', '--no-merges', '--reverse', f'{cli.args.from_ref}...{cli.args.branch}', '^upstream/master']
+    commit_list = cli.run(git_args, capture_output=True, stdin=DEVNULL)
+
+    if cache is None or gh is None:
+        cli.log.error('Missing one or more dependent python packages: "ghapi", "python-sqlite-cache"')
+        return 1
+
+    pr_list_bugs = []
+    pr_list_dependencies = []
+    pr_list_core = []
+    pr_list_keyboards = []
+    pr_list_keyboard_fixes = []
+    pr_list_cli = []
+    pr_list_others = []
+
+    def _categorise_commit(commit_info):
+        def fix_or_normal(info, fixes_collection, normal_collection):
+            if "bug" in info['pr_labels'] or fix_expr.search(info['title']):
+                fixes_collection.append(info)
+            else:
+                normal_collection.append(info)
+
+        if "dependencies" in commit_info['pr_labels']:
+            fix_or_normal(commit_info, pr_list_bugs, pr_list_dependencies)
+        elif "core" in commit_info['pr_labels']:
+            fix_or_normal(commit_info, pr_list_bugs, pr_list_core)
+        elif "keyboard" in commit_info['pr_labels'] or "keymap" in commit_info['pr_labels'] or "via" in commit_info['pr_labels']:
+            fix_or_normal(commit_info, pr_list_keyboard_fixes, pr_list_keyboards)
+        elif "cli" in commit_info['pr_labels']:
+            fix_or_normal(commit_info, pr_list_bugs, pr_list_cli)
+        else:
+            fix_or_normal(commit_info, pr_list_bugs, pr_list_others)
+
+    git_expr = re.compile(r'^(?P<hash>[a-f0-9]+) (?P<title>.*) \(#(?P<pr>[0-9]+)\)$')
+    for line in commit_list.stdout.split('\n'):
+        match = git_expr.search(line)
+        if match:
+            pr_info = _get_pr_info(cache, gh, match.group("pr"))
+            commit_info = {'hash': match.group("hash"), 'title': match.group("title"), 'pr_num': int(match.group("pr")), 'pr_labels': [label.name for label in pr_info.labels.items]}
+            _categorise_commit(commit_info)
+
+    def _dump_commit_list(name, collection):
+        if len(collection) == 0:
+            return
+        print("")
+        print(f"{name}:")
+        for commit in sorted(collection, key=lambda x: x['pr_num']):
+            title = clean1_expr.sub('', clean2_expr.sub('', commit['title'])).strip()
+            pr_num = commit['pr_num']
+            print(f'* {title} ([#{pr_num}](https://github.com/qmk/qmk_firmware/pull/{pr_num}))')
+
+    _dump_commit_list("Bugs", pr_list_bugs)
+    _dump_commit_list("Core", pr_list_core)
+    _dump_commit_list("CLI", pr_list_cli)
+    _dump_commit_list("Submodule updates", pr_list_dependencies)
+    _dump_commit_list("Keyboards", pr_list_keyboards)
+    _dump_commit_list("Keyboard fixes", pr_list_keyboard_fixes)
+    _dump_commit_list("Others", pr_list_others)