make changelog gist for moment

moment-gist.py

# coding: utf-8
import sys
if len(sys.argv) < 3:
    print("Must specify before and after tags. Example: 'python moment-gist.py 2.19.2 2.19.3'")
    sys.exit(1)

BEFORE = sys.argv[1]
AFTER = sys.argv[2]

import re
BEFORE_MATCH = re.compile(".*"+BEFORE+"$")
AFTER_MATCH = re.compile(".*"+AFTER+"$")

import subprocess
git_logs = subprocess.check_output(["git", "log", "--oneline"]).decode('utf-8').split('\n')

BEFORE_NUM = len(git_logs) - 1
AFTER_NUM = -1
for idx,log in enumerate(git_logs):
    if AFTER_MATCH.match(log):
        AFTER_NUM = max(AFTER_NUM, idx)
    elif BEFORE_MATCH.match(log):
        BEFORE_NUM = min(BEFORE_NUM, idx)

OTHER = "__OTHER__"
## converts header -> [changelog header, ordering, commits in this bucket]
CONVERT_CHART = {
    "[bugfix]": ["Bugfixes", 1, []],
    "[feature]": ["Features", 2, []],
    "[critical]": ["Critical", 0, []],
    "[new locale]": ["New locales", 3, []],
    "[locale]": ["Locale improvements", 4, []],
    "[misc]": ["Misc", 5, []],
    "[tests]": ["Tests", 7, []],
    "[pkg]": ["Packaging", 6, []],
    OTHER: ["Other", 8, []]
}

def linkify(entry):
    return re.sub(r'(#)(\d+)', r'[\1\2](https://github.com/moment/moment/pull/\2)', entry)

def make_entry(split_log):
    return linkify("* "
                   + split_log[-1][1:-1]
                   + " "
                   + " ".join(split_log[1:-1]))

for log in git_logs[AFTER_NUM+1:BEFORE_NUM]:
    split_log = log.split(" ")
    one_word_prefix = split_log[1]
    two_word_prefix = " ".join(split_log[1:3])
    if one_word_prefix in CONVERT_CHART:
        CONVERT_CHART[one_word_prefix][2].append(make_entry(split_log))
    elif two_word_prefix in CONVERT_CHART:
        CONVERT_CHART[two_word_prefix][2].append(make_entry(split_log))
    else:
        CONVERT_CHART[OTHER][2].append(make_entry(split_log))

sorted_keys = sorted(CONVERT_CHART, key=lambda x: CONVERT_CHART[x][1])
used_keys = list(filter(lambda key: 0 != len(CONVERT_CHART[key][2]), sorted_keys))

print("# moment %s changelog\n" % AFTER)
for key in used_keys:
    print("## %s\n" % CONVERT_CHART[key][0])
    print("\n".join(CONVERT_CHART[key][2]) + "\n")