Mercurial のリポジトリにおける、case folding collision を回避するための Python スクリプトです。 セントラルリポジトリの pretxnchangegroup フックでこのスクリプトを実行するように設定します。

avoid-case-folding-collision.py

#!/usr/bin/env python

import commands
import sys

latest_node = commands.getoutput("hg head --template '{node}'")
file_statuses = commands.getoutput("hg status --all --rev %(latest_node)s" % { "latest_node": latest_node })

file_status_list = file_statuses.split('\n')
latest_files = [x[2:] for x in file_status_list if len(x) >= 3 and x[0] != "A" and x[0] != " "]
latest_file_set = set([x.lower() for x in latest_files])

case_sensitive_file_count = len(latest_files)
case_insensitive_file_count = len(latest_file_set)

if case_insensitive_file_count < case_sensitive_file_count:
    print "Error: You cannot push changesets which cause case folding collision problems."

    for filename in latest_files:
        lower_filename = filename.lower()
        if lower_filename in latest_file_set:
            print filename
            break

        latest_file_set.remove(lower_filename)
    
    sys.exit(1)

else:
    sys.exit(0)

example-hgrc

[hooks]
pretxnchangegroup.avoidcasefoldingcollision=/path/to/avoid-case-folding-collision.py