fish-shell/build_tools/fish_xgettext.fish
2020-07-05 08:55:11 +02:00

55 lines
2.9 KiB
Fish
Executable file

#!/usr/bin/env fish
#
# Tool to generate messages.pot
# Extended to replace the old Makefile rule which did not port easily to CMake
# This script was originally motivated to work around a quirk (or bug depending on your viewpoint)
# of the xgettext command. See https://lists.gnu.org/archive/html/bug-gettext/2014-11/msg00006.html.
# However, it turns out that even if that quirk did not exist we would still need something like
# this script to properly extract descriptions. That's because we need to normalize the strings to
# a format that xgettext will handle correctly. Also, `xgettext -LShell` doesn't correctly extract
# all the strings we want translated. So we extract and normalize all such strings into a format
# that `xgettext` can handle.
# Start with the C++ source
xgettext -k -k_ -kN_ -LC++ --no-wrap -o messages.pot src/*.cpp src/*.h
# This regex handles descriptions for `complete` and `function` statements. These messages are not
# particularly important to translate. Hence the "implicit" label.
set -l implicit_regex '(?:^| +)(?:complete|function).*? (?:-d|--description) (([\'"]).+?(?<!\\\\)\\2).*'
# This regex handles explicit requests to translate a message. These are more important to translate
# than messages which should be implicitly translated.
set -l explicit_regex '.*\( *_ (([\'"]).+?(?<!\\\\)\\2) *\).*'
rm -r /tmp/fish
mkdir -p /tmp/fish/implicit/share/completions /tmp/fish/implicit/share/functions
mkdir -p /tmp/fish/explicit/share/completions /tmp/fish/explicit/share/functions
for f in share/config.fish share/completions/*.fish share/functions/*.fish
# Extract explicit attempts to translate a message. That is, those that are of the form
# `(_ "message")`.
string replace --filter --regex $explicit_regex 'echo $1' <$f | fish >/tmp/fish/explicit/$f.tmp 2>/dev/null
while read description
echo 'N_ "'(string replace --all '"' '\\"' -- $description)'"'
end </tmp/fish/explicit/$f.tmp >/tmp/fish/explicit/$f
rm /tmp/fish/explicit/$f.tmp
# Handle `complete` / `function` description messages. The `| fish` is subtle. It basically
# avoids the need to use `source` with a command substitution that could affect the current
# shell.
string replace --filter --regex $implicit_regex 'echo $1' <$f | fish >/tmp/fish/implicit/$f.tmp 2>/dev/null
while read description
# We don't use `string escape` as shown in the next comment because it produces output that
# is not parsed correctly by xgettext. Instead just escape double-quotes and quote the
# resulting string.
echo 'N_ "'(string replace --all '"' '\\"' -- $description)'"'
end </tmp/fish/implicit/$f.tmp >/tmp/fish/implicit/$f
rm /tmp/fish/implicit/$f.tmp
end
xgettext -j -k -kN_ -LShell --from-code=UTF-8 -cDescription --no-wrap -o messages.pot /tmp/fish/explicit/share/*/*.fish
xgettext -j -k -kN_ -LShell --from-code=UTF-8 -cDescription --no-wrap -o messages.pot /tmp/fish/implicit/share/*/*.fish
rm -r /tmp/fish