#!/bin/bash

set -e

# Script for generating a debconf templates file from both files
# in debian/po/*.po and country names translations from the
# iso-codes package

TEMPLATES="$@"

# Translations location (relative to the build root directory)
ISO3166TRANSLATIONS=debian/iso-codes

if [ -z "$DEB_HOST_ARCH" ]; then
	DEB_HOST_ARCH="$(dpkg-architecture -qDEB_HOST_ARCH)"
fi

# Get the English names for the country codes in the list
country_names() {
	# Ensure commas in country names end up escaped
	perl -ne 'chomp; s/.*\t//; s/,/\\\\,/; print ", $_"' $1
}

# Get the ordered list of countries from the iso_3166.xml, sorted
# according to the regionmap.

printf "Creating the list of countries for HTTP mirrors..."
HTTPCODECHOICES="$(cut -f1 debian/httplist-countries | xargs | sed 's/ /, /g')"
HTTPCHOICES="$(country_names debian/httplist-countries)"
printf " Done.\n"

printf "Creating the list of countries for FTP mirrors..."
FTPCODECHOICES="$(cut -f1 debian/ftplist-countries | xargs | sed 's/ /, /g')"
FTPCHOICES="$(country_names debian/ftplist-countries)"
printf " Done.\n"

printf "Insert the lists of choices into the templates file..."
(
	for t in $TEMPLATES; do
		cat $t
		echo
	done
) | debian/templates-build.pl "$DEB_HOST_ARCH" | \
    perl -pe 'if (m,http/countries$,) { $found = 2; } elsif ($found and /^Choices-C:/ && length "'"$HTTPCODECHOICES"'") { s/$/, '"$HTTPCODECHOICES"'/; $found -= 1; }  elsif ($found and /^__Choices:/ && length "'"$HTTPCHOICES"'") { s/$/'"$HTTPCHOICES"'/; $found -= 1; }' | \
    perl -pe 'if (m,ftp/countries$,) { $found = 2; } elsif ($found and /^Choices-C:/ && length "'"$FTPCODECHOICES"'") { s/$/, '"$FTPCODECHOICES"'/;  $found -= 1; } elsif ($found and /^__Choices:/ && length "'"$FTPCHOICES"'") { s/$/'"$FTPCHOICES"'/;  $found -= 1; }' \
    >debian/templates.tmp
printf " Done.\n"

# Create temporary "pobuild" directories
rm -rf debian/pobuild* >/dev/null 2>&1
mkdir debian/pobuild

# Create the appropriate POTFILES.in file there
cat >debian/pobuild/POTFILES.in <<EOF
[encoding: UTF-8]
[type: gettext/rfc822deb] templates.tmp
EOF

# Create the appropriate output file also
cat >debian/pobuild/output <<EOF
2   utf8
EOF

# Run debconf-updatepo to create pobuild/templates.pot
debconf-updatepo --podir debian/pobuild

printf "Include country names translations into the templates file:\n"
# The following takes place for each language
# (each existing file in debian/po)
for pofile in debian/po/*.po ; do
    pofilename=`basename $pofile`
    langname=`basename $pofilename .po`
    printf "  $langname..."

    cp $pofile debian/pobuild/$pofilename.d-i
    # update with generated templates.pot
    msgmerge -U debian/pobuild/$pofilename.d-i \
		debian/pobuild/templates.pot 2>/dev/null
    if [ -f $ISO3166TRANSLATIONS/$pofilename ]; then
        # ensure iso-codes translations are in UTF-8
	msgconv -t UTF-8 "$ISO3166TRANSLATIONS/$pofilename" \
		> debian/pobuild/$pofilename.iso-codes
        # merge with iso-codes translations
	msgmerge debian/pobuild/$pofilename.iso-codes \
		 debian/pobuild/$pofilename.d-i \
		 > debian/pobuild/$pofilename 2>/dev/null
        # clean out the generated file
	msgmerge -U debian/pobuild/$pofilename \
		    debian/pobuild/templates.pot 2>/dev/null
    else
	cp debian/pobuild/$pofilename.d-i debian/pobuild/$pofilename
    fi
    printf " done\n"
done

# and now we generate the templates file from all this
PODEBCONF_LIB=. po2debconf --podir debian/pobuild debian/templates.tmp | \
    sed "s/\[ Default value for .*\]//" \
    >debian/choose-mirror-bin.templates

# give the new templates file the same mtime as the input file, so that
# po2debconf doesn't decide that it needs to run debconf-updatepo
touch -mr debian/choose-mirror-bin.templates-in debian/choose-mirror-bin.templates

rm -f debian/templates.tmp