build: add luacheck for static analysis

.luacheckrc

@@ -0,0 +1,91 @@
+unused_args = false
+std = "luajit"
+
+globals = {
+    "G_reader_settings",
+}
+
+read_globals = {
+    "DRCOUNTMAX",
+    "DHINTCOUNT",
+    "DFULL_SCREEN",
+    "DSCROLL_MODE",
+    "DGLOBALGAMMA",
+    "DRENDER_MODE",
+    "DGLOBAL_CACHE_SIZE_MINIMUM",
+    "DGLOBAL_CACHE_FREE_PROPORTION",
+    "DGLOBAL_CACHE_SIZE_MAXIMUM",
+    "DBACKGROUND_COLOR",
+    "DOUTER_PAGE_COLOR",
+    "DCREREADER_VIEW_MODE",
+    "DSHOWOVERLAP",
+    "DSHOWHIDDENFILES",
+    "DLANDSCAPE_CLOCKWISE_ROTATION",
+    "DCREREADER_TWO_PAGE_THRESHOLD",
+    "DOVERLAPPIXELS",
+    "FOLLOW_LINK_TIMEOUT",
+    "DTAP_ZONE_MENU",
+    "DTAP_ZONE_CONFIG",
+    "DTAP_ZONE_MINIBAR",
+    "DTAP_ZONE_FORWARD",
+    "DTAP_ZONE_BACKWARD",
+    "DTAP_ZONE_BOOKMARK",
+    "DTAP_ZONE_FLIPPING",
+    "DDOUBLE_TAP_ZONE_NEXT_CHAPTER",
+    "DDOUBLE_TAP_ZONE_PREV_CHAPTER",
+    "DCHANGE_WEST_SWIPE_TO_EAST",
+    "DCHANGE_EAST_SWIPE_TO_WEST",
+    "DKOPTREADER_CONFIG_FONT_SIZE",
+    "DKOPTREADER_CONFIG_TEXT_WRAP",
+    "DKOPTREADER_CONFIG_TRIM_PAGE",
+    "DKOPTREADER_CONFIG_DETECT_INDENT",
+    "DKOPTREADER_CONFIG_DEFECT_SIZE",
+    "DKOPTREADER_CONFIG_PAGE_MARGIN",
+    "DKOPTREADER_CONFIG_LINE_SPACING",
+    "DKOPTREADER_CONFIG_RENDER_QUALITY",
+    "DKOPTREADER_CONFIG_AUTO_STRAIGHTEN",
+    "DKOPTREADER_CONFIG_JUSTIFICATION",
+    "DKOPTREADER_CONFIG_MAX_COLUMNS",
+    "DKOPTREADER_CONFIG_CONTRAST",
+    "DKOPTREADER_CONFIG_WORD_SPACINGS",
+    "DKOPTREADER_CONFIG_DEFAULT_WORD_SPACING",
+    "DKOPTREADER_CONFIG_DOC_LANGS_TEXT",
+    "DKOPTREADER_CONFIG_DOC_LANGS_CODE",
+    "DKOPTREADER_CONFIG_DOC_DEFAULT_LANG_CODE",
+    "DCREREADER_CONFIG_FONT_SIZES",
+    "DCREREADER_CONFIG_DEFAULT_FONT_SIZE",
+    "DCREREADER_CONFIG_MARGIN_SIZES_SMALL",
+    "DCREREADER_CONFIG_MARGIN_SIZES_MEDIUM",
+    "DCREREADER_CONFIG_MARGIN_SIZES_LARGE",
+    "DCREREADER_CONFIG_LIGHTER_FONT_GAMMA",
+    "DCREREADER_CONFIG_DEFAULT_FONT_GAMMA",
+    "DCREREADER_CONFIG_DARKER_FONT_GAMMA",
+    "DCREREADER_CONFIG_LINE_SPACE_PERCENT_SMALL",
+    "DCREREADER_CONFIG_LINE_SPACE_PERCENT_MEDIUM",
+    "DCREREADER_CONFIG_LINE_SPACE_PERCENT_LARGE",
+    "DCREREADER_PROGRESS_BAR",
+    "DMINIBAR_TOC_MARKER_WIDTH",
+    "DMINIBAR_HEIGHT",
+    "DMINIBAR_CONTAINER_HEIGHT",
+    "DMINIBAR_FONT_SIZE",
+    "DGESDETECT_DISABLE_DOUBLE_TAP",
+    "DAUTO_SAVE_PAGING_COUNT",
+    "DDICT_FONT_SIZE",
+    "FRONTLIGHT_SENSITIVITY_DECREASE",
+    "DALPHA_SORT_CASE_INSENSITIVE",
+    "SEARCH_LIBRARY_PATH",
+    "SEARCH_LIBRARY_PATH2",
+    "SEARCH_CASESENSITIVE",
+    "SEARCH_AUTHORS",
+    "SEARCH_TITLE",
+    "SEARCH_TAGS",
+    "SEARCH_SERIES",
+    "SEARCH_PATH",
+    "KOBO_LIGHT_ON_START",
+    "KOBO_SCREEN_SAVER",
+    "KOBO_SCREEN_SAVER_LAST_BOOK",
+    "NETWORK_PROXY",
+    "cre",
+    "lfs",
+    "lipc",
+}

Makefile

@@ -251,4 +251,9 @@ pot:
 po:
 	$(MAKE) -i -C l10n bootstrap pull
 
+static-check:
+	@if which luacheck > /dev/null; then luacheck frontend; else \
+		echo "[!] luacheck not found. "\
+		"you can install it with 'luarocks install luacheck'"; fi
+
 .PHONY: test

README.md

@@ -74,7 +74,7 @@ Your GCC should be at least of version 4.7 for both native and cross compiling.
 
 Users of Debian and Ubuntu can install the required packages using:
 ```
-sudo apt-get install build-essential libtool gcc-multilib \
+sudo apt-get install build-essential libtool gcc-multilib libffi-dev \
 patch wget unzip git autoconf subversion cmake nasm libsdl1.2-dev
 ```
 
@@ -181,6 +181,11 @@ To run unit tests in KOReader:
 make test
 ```
 
+To run Lua static-analysis for KOReader:
+```
+make statick-check
+```
+
 You may need to checkout the [travis config file][travis-conf] to setup up
 a proper testing environment. Briefly, you need to install `luarocks` and
 then install `busted` with `luarocks`. The "eng" language data file for