#!/bin/sh
# Build the `ltk/` tree an Android package carries under `assets/`: the
# themes, the font files their theme.json names by absolute path, the
# on-screen keyboard's layouts, and the MANIFEST that src/platform/android/assets.rs unpacks from, whose first
# line is a hash of the contents so a changed tree is unpacked again.
# web-assets.sh builds the same tree for a page through this script.
#
# Usage: scripts/android-assets.sh OUT_DIR [THEMES_DIR [THEME_ID...]]
# THEMES_DIR defaults to /usr/share/ltk/themes, THEME_ID to `default`.
# EXTRA_FONTS, space-separated paths, adds fonts the app itself reads from
# `ltk::resource_dir()/fonts`, such as a terminal's monospace face.
# KEYBOARDS_DIR defaults to the `keyboards/` next to this script's directory.
# MIME_DIR, shared-mime-info's directory, whose globs2, which
# `ltk::files::mime_type` reads from `mime/`, and subclasses are copied there,
# defaults to /usr/share/mime.
set -eu

keyboards=${KEYBOARDS_DIR:-$( cd "$( dirname "$0" )/.." && pwd )/keyboards}

if [ $# -lt 1 ]
then
	echo "usage: $0 OUT_DIR [THEMES_DIR [THEME_ID...]]" >&2
	exit 2
fi
out=$1
shift
themes=/usr/share/ltk/themes
if [ $# -gt 0 ]
then
	themes=$1
	shift
fi
[ $# -gt 0 ] || set -- default

root=$out/ltk
rm -rf "$root"
mkdir -p "$root/themes" "$root/fonts" "$root/keyboards"
cp "$keyboards"/*.json "$root/keyboards/"

for id in "$@"
do
	cp -r "$themes/$id" "$root/themes/$id"
	# ltk draws no cursor of its own on Android.
	rm -rf "$root/themes/$id/cursors" "$root/themes/$id/cursor.theme"
	grep -o '"path"[[:space:]]*:[[:space:]]*"/[^"]*"' "$themes/$id/theme.json" \
		| sed 's/.*"\(\/[^"]*\)"$/\1/' \
		| while read -r font
		do
			if [ -f "$font" ]
			then
				cp "$font" "$root/fonts/"
			else
				echo "android-assets: $font not found, skipped" >&2
			fi
		done
done

for font in ${EXTRA_FONTS:-}
do
	cp "$font" "$root/fonts/"
done

mime=${MIME_DIR:-/usr/share/mime}
for table in globs2 subclasses
do
	if [ -f "$mime/$table" ]
	then
		mkdir -p "$root/mime"
		cp "$mime/$table" "$root/mime/$table"
	else
		echo "android-assets: $mime/$table not found, skipped" >&2
	fi
done

cd "$root"
hash=$( find . -type f ! -name MANIFEST -print0 | LC_ALL=C sort -z | xargs -0 sha256sum | sha256sum | cut -d' ' -f1 )
{
	printf '# %s\n' "$hash"
	find . -type f ! -name MANIFEST | sed 's|^\./||' | LC_ALL=C sort
} > MANIFEST