Add grantlee5 plugin

Author: TheAssassin

grantlee5/README.md

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+# linuxdeploy-plugin-grantlee5
+
+This linuxdeploy plugin copies grantlee5's plugins into the AppDir and uses linuxdeploy and the Qt plugin to deploy the dependencies.
+
+The plugin uses CMake to auto-detect the plugins path. Should this fail (e.g., because they cannot be found by CMake, or during cross compilation), users can specify the directory manually in `$GRANTLEE5_PLUGINS_DIR`

grantlee5/linuxdeploy-plugin-grantlee5.sh

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+#! /bin/bash
+
+# exit whenever a command called in this script fails
+set -eo pipefail
+
+appdir=""
+
+show_usage() {
+    echo "Usage: bash $0 --appdir <AppDir>"
+}
+
+while [ "$1" != "" ]; do
+    case "$1" in
+        --plugin-api-version)
+            echo "0"
+            exit 0
+            ;;
+        --appdir)
+            appdir="$2"
+            shift
+            shift
+            ;;
+        *)
+            echo "Invalid argument: $1"
+            echo
+            show_usage
+            exit 2
+    esac
+done
+
+if [[ "$appdir" == "" ]]; then
+    show_usage
+    exit 2
+fi
+
+# we just need to copy the grantlee plugins properly to the Qt plugins dir which linuxdeploy-plugin-qt defines
+# http://www.grantlee.org/apidox_generictypes/using_and_deploying.html
+
+echo "### NOTE: THIS PLUGIN MUST BE USED IN COMBINATION WITH LINUXDEPLOY'S QT PLUGIN! ###"
+
+# grantlee doesn't provide any _easy_ way to find the plugins' path, therefore we ask CMake
+
+echo "Using CMake to find grantlee5 plugins path (note: you may need to specify your path manually using \$GRANTLEE5_PLUGINS_DIR, e.g., when cross-compiling)"
+
+if [[ "$GRANTLEE5_PLUGINS_DIR" == "" ]]; then
+    tempdir="$(mktemp -d /tmp/linuxdeploy-plugin-grantlee-XXXXX)"
+
+    _cleanup() {
+        cmake_log="$tempdir"/cmake.log
+        if [[ -f "$cmake_log" ]]; then
+            echo "CMake failed, log:"
+            cat "$cmake_log"
+        fi
+
+        [[ -d "$tempdir" ]] && rm -r "$tempdir"
+    }
+    trap _cleanup EXIT
+
+    pushd "$tempdir" &>/dev/null
+
+    cat > CMakeLists.txt <<\EOF
+cmake_minimum_required(VERSION 3.10)
+project(linuxdeploy-plugin-grantlee)
+
+find_package(Grantlee5 REQUIRED)
+
+set(imported_target "Grantlee5::defaultfilters")
+
+message(STATUS "Fetching imported location for target ${imported_target}")
+
+get_property(imported_location TARGET "${imported_target}" PROPERTY IMPORTED_LOCATION_NONE)
+message(STATUS "Imported location: ${imported_location}")
+
+file(WRITE "${CMAKE_CURRENT_SOURCE_DIR}/imported-location" "${imported_location}")
+EOF
+
+    cmake . &>cmake.log
+
+    # clean up log if everything worked, otherwise it would be printed by the cleanup handler
+    rm cmake.log
+
+    imported_location="$(cat imported-location)"
+
+    if [[ "$imported_location" == "" ]]; then
+        echo "Error: could not find plugins location with CMake"
+        exit 2
+    fi
+
+    GRANTLEE5_PLUGINS_DIR="$(dirname "$imported_location")"
+
+    popd &>/dev/null
+fi
+
+if [[ ! -d "$GRANTLEE5_PLUGINS_DIR" ]]; then
+    echo "Error: grantlee5 plugins directory does not exist or could not be found"
+    exit 2
+fi
+
+# guess grantlee version from the plugin path
+# this should always be the last component, as the plugins need to be stored in a directory like .../grantlee/<version>/grantlee*.so
+grantlee5_version="$(echo "$GRANTLEE5_PLUGINS_DIR" | rev | cut -d/ -f1 | rev)"
+
+target_dir="$appdir"/usr/plugins/grantlee/"$grantlee5_version"
+
+echo "Copying plugins from $GRANTLEE5_PLUGINS_DIR to $target_dir"
+install -v -D -t "$target_dir" "$GRANTLEE5_PLUGINS_DIR"/*
+
+echo "Using linuxdeploy to deploy dependencies"
+
+if ! test -x "$LINUXDEPLOY"; then
+    echo "Error: \$LINUXDEPLOY is not set"
+    exit 2
+fi
+
+"$LINUXDEPLOY" --appdir "$appdir" --plugin qt --deploy-deps-only "$target_dir"