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prepare-multi-lang.sh
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prepare-multi-lang.sh
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#!/usr/bin/env bash
#
# Prepare the site to be used by apache with mod_negotiation.
#
# Takes a file tree that looks like this:
# _site/
# en/
# index.html
# packages/
# org.fdroid.fdroid/index.html
# ...
# fr/
# index.html
# packages/
# org.fdroid.fdroid/index.html
# ...
#
# And transforms it into this:
#
# _site/
# index.html.en -> en/index.html
# index.html.fr -> fr/index.html
# packages/
# org.fdroid.fdroid/index.html.en -> en/packages/org.fdroid.fdroid/index.html
# org.fdroid.fdroid/index.html.fr -> fr/packages/org.fdroid.fdroid/index.html
# ...
# en/
# index.html
# packages/
# org.fdroid.fdroid/index.html
# ...
# fr/
# index.html
# packages/
# org.fdroid.fdroid/index.html
# ...
#
# This is the format used by Apache's MultiViews directive, meaning we don't need to write out Type Maps for each file.
# Note that it doesn't try to i18n the following files: .htaccess, *.css, *.js.
# These are just copied from the en/ subdirectory into the webroot.
#
# Fail on errors.
set -eu -o pipefail
function assert_file {
if [[ ! -f ${1} ]]; then
echo "Expected file at ${1}, but not found."
exit 1
fi
}
#
# When in _site and creating a symlink from assets/blah.png.fr to fr/assets/blah.png, the link needs
# to point to a relative path (i.e. ln -s ../fr/assets.blah.png assets/blah.png.fr).
# This function uses `realpath --relative-to` to ensure that the relative path is used.
#
function relative_symlink {
SRC=$1
DEST=$2
DEST_DIR=`dirname ${DEST}`
SRC_RELATIVE_TO_DEST=`realpath --relative-to="${DEST_DIR}" "${SRC}"`
ln -sf ${SRC_RELATIVE_TO_DEST} ${DEST}
}
function convert_weblate_language_code {
LANG_CODE=$1
echo ${LANG_CODE} | tr '[:upper:]' '[:lower:]' | tr '_' '-'
}
function write_typemap {
OUTPUT_FILE=$1
LANGS_TO_WRITE=$2
echo "" > ${OUTPUT_FILE}
FILE_NAME=`basename ${OUTPUT_FILE}`
for WEBLATE_LANG in ${LANGS_TO_WRITE}; do
HTTP_LANG=`convert_weblate_language_code ${WEBLATE_LANG}`
cat<<TXT >> ${OUTPUT_FILE}
URI: ${FILE_NAME}.${WEBLATE_LANG}
Content-language: ${HTTP_LANG}
Content-type: text/html
TXT
done
}
if [ ! -f .supported-langs ]; then
echo "Must be run from the same directory as the .supported-langs file (the Jekyll source dir)."
echo "If that file doesn't exist, then you can generate it with ./tools/update_langs.sh"
exit 1
fi
if [[ $# == 0 || ! -d $1/en ]]; then
echo "First argument must be the directory of the Jekyll website."
echo "This should take into account the baseurl as well. If the site"
echo "is output to 'build/' and the baseurl is 'fdroid-website/' then"
echo "the first argument should be 'build/fdroid-website/'"
exit 1
fi
# This populates the SUPPORTED_LANGS variable.
source .supported-langs
# This populates the WEBLATE_LANGS variable.
source tools/weblate-supported-langs.sh
cd $1
# For deploying to GitLab or surge.sh, we still want it to work, which requires leaving original English *.html files
# in the webroot rather than just MultiView compatible *.html.LANG files.
if [[ $# == 2 && $2 == "--no-type-maps" ]]; then
MULTI_VIEWS=false
else
MULTI_VIEWS=true
fi
find en/ -type f -print0 | while IFS= read -r -d '' FILE_PATH
do
DIR=${FILE_PATH#*/} # Strip off the leading "en/" from the path
DIR=`dirname ${DIR}`
FILE=`basename ${FILE_PATH}`
EXTENSION=${FILE_PATH##*.}
mkdir -p ${DIR}
# At this stage we are only translating .html files.
# In the future when we support i18n of graphics too, then this will need to be updated.
if [[ ${MULTI_VIEWS} = false || ${EXTENSION} != "html" ]]; then
echo "Not generating i18n version of ${DIR}/${FILE}"
cp ${FILE_PATH} ${DIR}/${FILE}
continue;
fi
echo "Processing ${DIR}/${FILE}"
for LANG in $SUPPORTED_LANGS; do
SRC_I18N_FILE=${LANG}/${DIR}/${FILE}
DEST_I18N_FILE=${DIR}/${FILE}.${LANG}
assert_file ${SRC_I18N_FILE}
relative_symlink ${SRC_I18N_FILE} ${DEST_I18N_FILE}
done
write_typemap ${DIR}/${FILE} "$SUPPORTED_LANGS"
done
if [[ ${MULTI_VIEWS} = true ]]; then
ALIAS_MATCH=""
SIMPLE_LANGS=""
SET_ENV_IF=""
for WEBLATE_LANG in ${WEBLATE_LANGS}; do
if [[ ${ALIAS_MATCH} == "" ]]; then
ALIAS_MATCH=${WEBLATE_LANG}
else
ALIAS_MATCH="${ALIAS_MATCH}|${WEBLATE_LANG}"
fi
HTTP_LANG=`convert_weblate_language_code ${WEBLATE_LANG}`
if [ ${HTTP_LANG} == ${WEBLATE_LANG} ]; then
if [[ ${SIMPLE_LANGS} == "" ]]; then
SIMPLE_LANGS=${WEBLATE_LANG}
else
SIMPLE_LANGS="$SIMPLE_LANGS|$WEBLATE_LANG"
fi
else
SET_ENV_IF=`echo -e "SetEnvIf Request_URI ^/$WEBLATE_LANG/ prefer-language=$HTTP_LANG\n $SET_ENV_IF"`
fi
done
cat<<HELP
Finished preparing site for i18n using Apache2 and mod_negotiation.
Ensure that you have the following in your Apache2 Server/VirtualHost config, where "/var/www/html" is replaced with your webroot:
<Files *.html>
SetHandler type-map
</Files>
# Virtualize the language sub"directories"
AliasMatch ^(?:/(?:${ALIAS_MATCH})/)?(.*)?\$ /var/www/html/\$1
# Tell mod_negotiation which language to prefer
SetEnvIf Request_URI ^/(${SIMPLE_LANGS})/ prefer-language=\$1
# Language codes from Weblate containing capital letters and underscores need to be treated
# differently, namely the language they refer to is lower case with a hyphen
$SET_ENV_IF
HELP
fi