Improve the commit-msg Git hook for unibyte environments

* build-aux/git-hooks/commit-msg: Set LC_ALL=C, before running Awk
in unibyte environments.  (Suggested by Paul Eggert
<eggert@cs.ucla.edu>.)  Use a more accurate approximation to
[:print:], based on UTF-8 sequences of the unprintable characters.
This commit is contained in:
Eli Zaretskii 2015-04-14 21:57:23 +03:00
parent 807a0e98f0
commit 95cee7f6a6

View file

@ -36,8 +36,11 @@ at_sign=`$awk "$print_at_sign" </dev/null 2>/dev/null`
if test "$at_sign" != @; then
at_sign=`LC_ALL=en_US.UTF-8 $awk "$print_at_sign" </dev/null 2>/dev/null`
if test "$at_sign" = @; then
LC_ALL=en_US.UTF-8; export LC_ALL
LC_ALL=en_US.UTF-8
else
LC_ALL=C
fi
export LC_ALL
fi
# Check the log entry.
@ -45,10 +48,13 @@ exec $awk -v at_sign="$at_sign" -v cent_sign="$cent_sign" '
BEGIN {
# These regular expressions assume traditional Unix unibyte behavior.
# They are needed for old or broken versions of awk, e.g.,
# mawk 1.3.3 (1996), or gawk on MSYS (2015).
# mawk 1.3.3 (1996), or gawk on MSYS (2015), and/or for systems that
# cannot use UTF-8 as the codeset for the locale.
space = "[ \f\n\r\t\v]"
non_space = "[^ \f\n\r\t\v]"
non_print = "[\1-\37\177]"
# The non_print below rejects control characters and surrogates
# UTF-8 for: 0x01-0x1f 0x7f 0x80-0x9f 0xd800-0xdbff 0xdc00-0xdfff
non_print = "[\1-\37\177]|\302[\200-\237]|\355[\240-\277][\200-\277]"
# Prefer POSIX regular expressions if available, as they do a
# better job of checking. Similarly, prefer POSIX negated